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6-K 1 gmab-20250414x6k.htm 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



FORM 6-K


REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF APRIL 2025


COMMISSION FILE NUMBER 001-38976

Genmab A/S
(Exact name of Registrant as specified in its charter)

Carl Jacobsens Vej 30

2500 Valby

Denmark

+45 70 20 27 28
(Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ⌧ Form 40-F ◻

This report on Form 6-K shall be deemed to be incorporated by reference in Genmab A/S’s registration statements on Form S-8 (File No. 333-232693, 333-253519, 333-262970, 333-277273 and 333-284876) and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.


SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

nthony

GENMAB A/S

BY:

/s/ Anthony Pagano

Name: Anthony Pagano

Title: Executive Vice President & Chief Financial Officer

DATE: APRIL 14, 2025


EXHIBIT INDEX

O

Exhibit

Description of Exhibit

99.1

Company Announcement Dated April 14, 2025: Transactions in Connection with Share Buy-back Program

99.1(a)

Appendix Share buyback program – Specification for April 7 – April 9, 2025

99.1(b)

Appendix Share buyback program – Specification for April 10 – April 11, 2025


EX-99.1 2 gmab-20250414xex99d1.htm EX-99.1

Exhibit 99.1

Graphic

Transactions in Connection with Share Buy-back Program

Company Announcement

COPENHAGEN, Denmark; April 14, 2025 – Genmab A/S (Nasdaq: GMAB). On March 25, 2025, Genmab announced the initiation of a share buy-back program to repurchase up to 2.2 million shares to reduce capital and to honor our commitments under the Restricted Stock Unit program. The share buy-back program is expected to be completed no later than July 10, 2025.

The following transactions were executed under the program from April 7 to April 11, 2025:

Trading Platform

No. of shares

Average price (DKK)

Total value (DKK)

Accumulated through last announcement

636,089

842,761,475.78

April 7, 2025

XCSE

57,453

1,220.89

BCXE

28,000

1,220.60

AQEU

4,700

1,218.75

TQEX

5,500

1,218.54

Total

95,653

116,750,732.64

April 8, 2025

XCSE

54,200

1,269.18

BCXE

26,400

1,269.08

AQEU

4,400

1,269.80

TQEX

5,000

1,268.78

Total

90,000

114,224,256.00

April 9, 2025

XCSE

51,000

1,189.42

BCXE

26,000

1,189.36

AQEU

3,752

1,187.35

TQEX

5,000

1,190.17

Total

85,752

101,989,587.11

April 10, 2025

XCSE

51,010

1,250.98

BCXE

26,579

1,250.91

AQEU

4,800

1,250.99

TQEX

5,100

1,251.84

Total

87,489

109,449,263.93

April 11, 2025

XCSE

52,840

1,222.93

BCXE

27,400

1,222.90

AQEU

3,579

1,222.79

TQEX

5,100

1,222.09

Total

88,919

108,735,915.15

Total

447,813

551,149,754.83

Accumulated under the program 

1,083,902

1,393,911,230.61

Genmab A/S

Tel: +45 7020 2728

Company Announcement no. 19

Carl Jacobsens Vej 30

Fax: +45 7020 2729

Page 1/2

2500 Valby, Denmark

www.genmab.com

CVR no. 2102 3884

LEI Code 529900MTJPDPE4MHJ122


Graphic

Transactions in Connection with Share Buy-back Program

Details of each transaction are included as an appendix to this announcement.

Following these transactions, Genmab holds 1,536,655 shares as treasury shares, corresponding to 2.40% of the total share capital and voting rights.

The share buy-back program is undertaken in accordance with Regulation (EU) No. 596/2014 (‘MAR’) and the Commission Delegated Regulation (EU) 2016/1052, also referred to as the “Safe Harbour Regulation.” Further details on the terms of the share buy-back program can be found in our company announcement no. 14 dated March 25, 2025.

About Genmab

Genmab is an international biotechnology company with a core purpose of guiding its unstoppable team to strive toward improving the lives of patients with innovative and differentiated antibody therapeutics. For more than 25 years, its passionate, innovative and collaborative team has invented next-generation antibody technology platforms and leveraged translational, quantitative and data sciences, resulting in a proprietary pipeline including bispecific T-cell engagers, antibody-drug conjugates, next-generation immune checkpoint modulators and effector function-enhanced antibodies. By 2030, Genmab’s vision is to transform the lives of people with cancer and other serious diseases with knock-your-socks-off (KYSO) antibody medicines®. 

 

Established in 1999, Genmab is headquartered in Copenhagen, Denmark, with international presence across North America, Europe and Asia Pacific. For more information, please visit Genmab.com and follow us on LinkedIn and X.

Contact:
Marisol Peron, Senior Vice President, Global Communications & Corporate Affairs

T: +1 609 524 0065; E: mmp@genmab.com

Andrew Carlsen, Vice President, Head of Investor Relations

T: +45 3377 9558; E: acn@genmab.com


This Company Announcement contains forward looking statements. The words “believe,” “expect,” “anticipate,” “intend” and “plan” and similar expressions identify forward looking statements. Actual results or performance may differ materially from any future results or performance expressed or implied by such statements. The important factors that could cause our actual results or performance to differ materially include, among others, risks associated with pre-clinical and clinical development of products, uncertainties related to the outcome and conduct of clinical trials including unforeseen safety issues, uncertainties related to product manufacturing, the lack of market acceptance of our products, our inability to manage growth, the competitive environment in relation to our business area and markets, our inability to attract and retain suitably qualified personnel, the unenforceability or lack of protection of our patents and proprietary rights, our relationships with affiliated entities, changes and developments in technology which may render our products or technologies obsolete, and other factors. For a further discussion of these risks, please refer to the risk management sections in Genmab’s most recent financial reports, which are available on www.genmab.com and the risk factors included in Genmab’s most recent Annual Report on Form 20-F and other filings with the U.S. Securities and Exchange Commission (SEC), which are available at www.sec.gov. Genmab does not undertake any obligation to update or revise forward looking statements in this Company Announcement nor to confirm such statements to reflect subsequent events or circumstances after the date made or in relation to actual results, unless required by law.


Genmab A/S and/or its subsidiaries own the following trademarks: Genmab®; the Y-shaped Genmab logo®; Genmab in combination with the Y-shaped Genmab logo®; HuMax®; DuoBody®; HexaBody®; DuoHexaBody®, HexElect® and KYSO®.

Genmab A/S

Tel: +45 7020 2728

Company Announcement no. 19

Carl Jacobsens Vej 30

Fax: +45 7020 2729

Page 2/2

2500 Valby, Denmark

www.genmab.com

CVR no. 2102 3884

LEI Code 529900MTJPDPE4MHJ122


EX-99.1(A) 3 gmab-20250414xex99d1a.htm EX-99.1(A)

Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

Issuer

Date

Time CET

Quantity

Price (DKK)

Venue

GENMAB A/S

07-Apr-2025

09:35:27 AM

42

1177.00

XCSE

GENMAB A/S

07-Apr-2025

09:35:27 AM

32

1177.00

XCSE

GENMAB A/S

07-Apr-2025

09:35:27 AM

80

1177.00

AQEU

GENMAB A/S

07-Apr-2025

09:35:27 AM

73

1177.00

CEUX

GENMAB A/S

07-Apr-2025

09:35:33 AM

54

1177.00

XCSE

GENMAB A/S

07-Apr-2025

09:35:33 AM

49

1177.00

CEUX

GENMAB A/S

07-Apr-2025

09:35:34 AM

54

1177.00

AQEU

GENMAB A/S

07-Apr-2025

09:36:09 AM

26

1178.00

XCSE

GENMAB A/S

07-Apr-2025

09:36:09 AM

28

1178.00

CEUX

GENMAB A/S

07-Apr-2025

09:36:36 AM

33

1177.50

AQEU

GENMAB A/S

07-Apr-2025

09:36:36 AM

76

1177.50

TQEX

GENMAB A/S

07-Apr-2025

09:36:39 AM

26

1177.00

XCSE

GENMAB A/S

07-Apr-2025

09:36:39 AM

31

1176.50

AQEU

GENMAB A/S

07-Apr-2025

09:36:39 AM

71

1176.50

TQEX

GENMAB A/S

07-Apr-2025

09:36:39 AM

28

1177.00

CEUX

GENMAB A/S

07-Apr-2025

09:37:32 AM

28

1179.00

XCSE

GENMAB A/S

07-Apr-2025

09:37:32 AM

55

1179.00

XCSE

GENMAB A/S

07-Apr-2025

09:37:35 AM

87

1178.00

XCSE

GENMAB A/S

07-Apr-2025

09:37:35 AM

27

1178.50

TQEX

GENMAB A/S

07-Apr-2025

09:37:35 AM

51

1178.00

CEUX

GENMAB A/S

07-Apr-2025

09:37:39 AM

25

1177.50

TQEX

GENMAB A/S

07-Apr-2025

09:37:40 AM

86

1177.00

XCSE

GENMAB A/S

07-Apr-2025

09:37:40 AM

9

1177.00

CEUX

GENMAB A/S

07-Apr-2025

09:37:40 AM

46

1177.00

CEUX

GENMAB A/S

07-Apr-2025

09:37:48 AM

64

1176.00

XCSE

GENMAB A/S

07-Apr-2025

09:37:48 AM

75

1176.00

CEUX

GENMAB A/S

07-Apr-2025

09:38:01 AM

24

1174.50

XCSE

GENMAB A/S

07-Apr-2025

09:38:31 AM

28

1173.00

XCSE

GENMAB A/S

07-Apr-2025

09:38:31 AM

12

1173.00

TQEX

GENMAB A/S

07-Apr-2025

09:38:31 AM

18

1173.00

TQEX

GENMAB A/S

07-Apr-2025

09:38:36 AM

24

1172.00

XCSE

GENMAB A/S

07-Apr-2025

09:40:29 AM

84

1180.00

XCSE

GENMAB A/S

07-Apr-2025

09:40:29 AM

24

1180.00

TQEX

GENMAB A/S

07-Apr-2025

09:40:29 AM

22

1180.00

CEUX

GENMAB A/S

07-Apr-2025

09:40:49 AM

63

1180.50

XCSE

GENMAB A/S

07-Apr-2025

09:41:20 AM

40

1180.00

CEUX

GENMAB A/S

07-Apr-2025

09:41:39 AM

5

1180.50

CEUX

GENMAB A/S

07-Apr-2025

09:42:22 AM

46

1183.00

XCSE

GENMAB A/S

07-Apr-2025

09:42:22 AM

44

1183.00

XCSE

GENMAB A/S

07-Apr-2025

09:42:52 AM

24

1182.50

TQEX

GENMAB A/S

07-Apr-2025

09:42:52 AM

64

1182.50

CEUX

1


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

09:44:20 AM

87

1185.50

XCSE

GENMAB A/S

07-Apr-2025

09:44:20 AM

56

1185.50

CEUX

GENMAB A/S

07-Apr-2025

09:44:32 AM

45

1185.00

TQEX

GENMAB A/S

07-Apr-2025

09:44:37 AM

87

1184.00

XCSE

GENMAB A/S

07-Apr-2025

09:44:37 AM

58

1184.50

CEUX

GENMAB A/S

07-Apr-2025

09:44:54 AM

7

1185.50

CEUX

GENMAB A/S

07-Apr-2025

09:45:12 AM

25

1188.00

XCSE

GENMAB A/S

07-Apr-2025

09:45:12 AM

20

1188.00

XCSE

GENMAB A/S

07-Apr-2025

09:45:12 AM

38

1188.00

XCSE

GENMAB A/S

07-Apr-2025

09:47:05 AM

86

1192.00

XCSE

GENMAB A/S

07-Apr-2025

09:47:05 AM

10

1191.00

XCSE

GENMAB A/S

07-Apr-2025

09:47:05 AM

79

1191.00

XCSE

GENMAB A/S

07-Apr-2025

09:47:05 AM

86

1192.50

CEUX

GENMAB A/S

07-Apr-2025

09:47:05 AM

79

1191.50

CEUX

GENMAB A/S

07-Apr-2025

09:47:15 AM

26

1191.50

CEUX

GENMAB A/S

07-Apr-2025

09:47:21 AM

31

1190.50

CEUX

GENMAB A/S

07-Apr-2025

09:47:48 AM

84

1191.00

XCSE

GENMAB A/S

07-Apr-2025

09:48:04 AM

11

1192.00

CEUX

GENMAB A/S

07-Apr-2025

09:48:04 AM

21

1192.00

CEUX

GENMAB A/S

07-Apr-2025

09:48:05 AM

88

1191.50

XCSE

GENMAB A/S

07-Apr-2025

09:48:15 AM

4

1190.50

CEUX

GENMAB A/S

07-Apr-2025

09:48:34 AM

84

1192.00

XCSE

GENMAB A/S

07-Apr-2025

09:48:34 AM

27

1192.00

AQEU

GENMAB A/S

07-Apr-2025

09:48:48 AM

66

1192.00

XCSE

GENMAB A/S

07-Apr-2025

09:48:48 AM

31

1192.00

AQEU

GENMAB A/S

07-Apr-2025

09:48:49 AM

32

1191.50

CEUX

GENMAB A/S

07-Apr-2025

09:48:53 AM

85

1191.00

XCSE

GENMAB A/S

07-Apr-2025

09:48:53 AM

25

1191.00

TQEX

GENMAB A/S

07-Apr-2025

09:48:53 AM

26

1191.00

AQEU

GENMAB A/S

07-Apr-2025

09:48:58 AM

21

1190.50

CEUX

GENMAB A/S

07-Apr-2025

09:49:00 AM

90

1190.00

XCSE

GENMAB A/S

07-Apr-2025

09:49:00 AM

24

1190.00

AQEU

GENMAB A/S

07-Apr-2025

09:51:02 AM

66

1194.00

XCSE

GENMAB A/S

07-Apr-2025

09:51:02 AM

25

1194.00

AQEU

GENMAB A/S

07-Apr-2025

09:51:02 AM

47

1194.00

CEUX

GENMAB A/S

07-Apr-2025

09:51:20 AM

24

1194.00

TQEX

GENMAB A/S

07-Apr-2025

09:51:20 AM

40

1194.50

CEUX

GENMAB A/S

07-Apr-2025

09:51:36 AM

27

1193.00

XCSE

GENMAB A/S

07-Apr-2025

09:51:36 AM

2

1193.00

XCSE

GENMAB A/S

07-Apr-2025

09:51:36 AM

28

1193.00

XCSE

GENMAB A/S

07-Apr-2025

09:51:36 AM

36

1193.00

CEUX

GENMAB A/S

07-Apr-2025

09:51:37 AM

54

1192.00

XCSE

GENMAB A/S

07-Apr-2025

09:51:37 AM

41

1192.00

CEUX

2


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

09:52:07 AM

24

1191.00

CEUX

GENMAB A/S

07-Apr-2025

09:52:51 AM

86

1191.50

XCSE

GENMAB A/S

07-Apr-2025

09:52:51 AM

12

1191.50

CEUX

GENMAB A/S

07-Apr-2025

09:52:51 AM

14

1191.50

CEUX

GENMAB A/S

07-Apr-2025

09:53:19 AM

45

1192.50

TQEX

GENMAB A/S

07-Apr-2025

09:53:19 AM

2

1192.50

TQEX

GENMAB A/S

07-Apr-2025

09:53:19 AM

12

1192.50

CEUX

GENMAB A/S

07-Apr-2025

09:53:19 AM

13

1192.50

CEUX

GENMAB A/S

07-Apr-2025

09:53:21 AM

11

1192.00

AQEU

GENMAB A/S

07-Apr-2025

09:53:56 AM

62

1191.50

XCSE

GENMAB A/S

07-Apr-2025

09:53:56 AM

51

1190.50

XCSE

GENMAB A/S

07-Apr-2025

09:53:59 AM

19

1190.00

CEUX

GENMAB A/S

07-Apr-2025

09:53:59 AM

5

1190.00

CEUX

GENMAB A/S

07-Apr-2025

09:54:03 AM

27

1189.50

CEUX

GENMAB A/S

07-Apr-2025

09:55:58 AM

85

1193.50

XCSE

GENMAB A/S

07-Apr-2025

09:55:58 AM

29

1193.50

AQEU

GENMAB A/S

07-Apr-2025

09:55:58 AM

35

1193.50

CEUX

GENMAB A/S

07-Apr-2025

09:56:05 AM

52

1195.00

XCSE

GENMAB A/S

07-Apr-2025

09:56:05 AM

36

1195.00

XCSE

GENMAB A/S

07-Apr-2025

09:56:05 AM

24

1195.50

CEUX

GENMAB A/S

07-Apr-2025

09:56:57 AM

85

1195.00

XCSE

GENMAB A/S

07-Apr-2025

09:56:58 AM

85

1194.00

XCSE

GENMAB A/S

07-Apr-2025

09:56:58 AM

34

1194.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:00 AM

61

1195.50

XCSE

GENMAB A/S

07-Apr-2025

09:58:00 AM

26

1195.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:21 AM

44

1194.50

XCSE

GENMAB A/S

07-Apr-2025

09:58:21 AM

24

1194.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:31 AM

27

1194.00

AQEU

GENMAB A/S

07-Apr-2025

09:58:33 AM

3

1193.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:33 AM

30

1193.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:41 AM

1

1193.00

XCSE

GENMAB A/S

07-Apr-2025

09:58:41 AM

83

1193.00

XCSE

GENMAB A/S

07-Apr-2025

09:58:45 AM

2

1192.50

CEUX

GENMAB A/S

07-Apr-2025

09:58:45 AM

24

1192.50

CEUX

GENMAB A/S

07-Apr-2025

09:59:09 AM

24

1195.00

CEUX

GENMAB A/S

07-Apr-2025

09:59:23 AM

13

1196.00

XCSE

GENMAB A/S

07-Apr-2025

09:59:23 AM

54

1196.00

XCSE

GENMAB A/S

07-Apr-2025

09:59:23 AM

27

1196.00

CEUX

GENMAB A/S

07-Apr-2025

10:00:10 AM

35

1196.50

TQEX

GENMAB A/S

07-Apr-2025

10:00:12 AM

72

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:00:32 AM

10

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:00:32 AM

30

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:00:34 AM

31

1196.00

CEUX

3


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:00:38 AM

63

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:00:38 AM

24

1195.00

CEUX

GENMAB A/S

07-Apr-2025

10:00:43 AM

20

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:00:43 AM

7

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:00:43 AM

27

1195.00

AQEU

GENMAB A/S

07-Apr-2025

10:00:43 AM

25

1195.00

CEUX

GENMAB A/S

07-Apr-2025

10:00:46 AM

54

1194.00

XCSE

GENMAB A/S

07-Apr-2025

10:01:04 AM

24

1194.50

CEUX

GENMAB A/S

07-Apr-2025

10:01:28 AM

34

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:03:02 AM

75

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:05:04 AM

87

1205.00

XCSE

GENMAB A/S

07-Apr-2025

10:05:04 AM

87

1203.50

XCSE

GENMAB A/S

07-Apr-2025

10:05:04 AM

13

1202.50

XCSE

GENMAB A/S

07-Apr-2025

10:05:04 AM

71

1202.50

XCSE

GENMAB A/S

07-Apr-2025

10:05:04 AM

33

1205.00

TQEX

GENMAB A/S

07-Apr-2025

10:05:04 AM

26

1204.00

TQEX

GENMAB A/S

07-Apr-2025

10:05:04 AM

24

1205.00

AQEU

GENMAB A/S

07-Apr-2025

10:05:04 AM

62

1205.00

CEUX

GENMAB A/S

07-Apr-2025

10:05:04 AM

56

1203.50

CEUX

GENMAB A/S

07-Apr-2025

10:05:04 AM

54

1202.50

CEUX

GENMAB A/S

07-Apr-2025

10:05:05 AM

89

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:05:05 AM

56

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:05:37 AM

24

1202.50

XCSE

GENMAB A/S

07-Apr-2025

10:05:45 AM

26

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:08:07 AM

27

1205.50

TQEX

GENMAB A/S

07-Apr-2025

10:08:07 AM

20

1205.50

TQEX

GENMAB A/S

07-Apr-2025

10:08:48 AM

90

1204.50

XCSE

GENMAB A/S

07-Apr-2025

10:08:48 AM

25

1204.50

AQEU

GENMAB A/S

07-Apr-2025

10:08:48 AM

51

1205.00

CEUX

GENMAB A/S

07-Apr-2025

10:09:14 AM

35

1204.00

CEUX

GENMAB A/S

07-Apr-2025

10:09:31 AM

62

1203.50

XCSE

GENMAB A/S

07-Apr-2025

10:09:31 AM

26

1203.50

AQEU

GENMAB A/S

07-Apr-2025

10:09:31 AM

3

1203.00

CEUX

GENMAB A/S

07-Apr-2025

10:09:31 AM

21

1203.00

CEUX

GENMAB A/S

07-Apr-2025

10:10:02 AM

3

1202.50

XCSE

GENMAB A/S

07-Apr-2025

10:10:02 AM

40

1202.50

XCSE

GENMAB A/S

07-Apr-2025

10:10:21 AM

85

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:10:21 AM

48

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:11:05 AM

52

1201.00

CEUX

GENMAB A/S

07-Apr-2025

10:11:29 AM

7

1202.00

CEUX

GENMAB A/S

07-Apr-2025

10:11:29 AM

33

1202.00

CEUX

GENMAB A/S

07-Apr-2025

10:11:31 AM

45

1202.00

AQEU

GENMAB A/S

07-Apr-2025

10:11:42 AM

85

1201.50

XCSE

4


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:11:51 AM

25

1201.00

CEUX

GENMAB A/S

07-Apr-2025

10:11:58 AM

88

1200.50

XCSE

GENMAB A/S

07-Apr-2025

10:12:11 AM

87

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:12:11 AM

25

1200.00

CEUX

GENMAB A/S

07-Apr-2025

10:12:11 AM

30

1200.00

CEUX

GENMAB A/S

07-Apr-2025

10:12:31 AM

29

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:13:07 AM

33

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:13:37 AM

24

1201.00

CEUX

GENMAB A/S

07-Apr-2025

10:13:54 AM

29

1200.00

TQEX

GENMAB A/S

07-Apr-2025

10:13:59 AM

11

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:13:59 AM

16

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:13:59 AM

56

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:15:01 AM

6

1200.50

XCSE

GENMAB A/S

07-Apr-2025

10:15:06 AM

83

1200.50

XCSE

GENMAB A/S

07-Apr-2025

10:15:06 AM

28

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:15:33 AM

33

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:15:45 AM

31

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:15:48 AM

7

1201.00

XCSE

GENMAB A/S

07-Apr-2025

10:15:48 AM

78

1201.00

XCSE

GENMAB A/S

07-Apr-2025

10:16:15 AM

36

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:17:03 AM

42

1202.00

XCSE

GENMAB A/S

07-Apr-2025

10:17:03 AM

30

1202.00

XCSE

GENMAB A/S

07-Apr-2025

10:17:03 AM

10

1202.00

XCSE

GENMAB A/S

07-Apr-2025

10:17:03 AM

12

1202.00

XCSE

GENMAB A/S

07-Apr-2025

10:18:14 AM

41

1202.00

CEUX

GENMAB A/S

07-Apr-2025

10:18:20 AM

83

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:18:20 AM

32

1201.50

TQEX

GENMAB A/S

07-Apr-2025

10:18:20 AM

24

1201.50

AQEU

GENMAB A/S

07-Apr-2025

10:18:33 AM

32

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:18:33 AM

15

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:18:33 AM

11

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:18:33 AM

55

1201.50

XCSE

GENMAB A/S

07-Apr-2025

10:18:46 AM

24

1200.50

TQEX

GENMAB A/S

07-Apr-2025

10:18:46 AM

30

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:18:53 AM

89

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:18:53 AM

11

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:18:53 AM

14

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:19:01 AM

77

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:19:01 AM

85

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:19:01 AM

15

1197.50

AQEU

GENMAB A/S

07-Apr-2025

10:19:01 AM

39

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:19:01 AM

37

1197.50

CEUX

GENMAB A/S

07-Apr-2025

10:20:33 AM

20

1202.00

TQEX

5


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:20:41 AM

35

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:20:45 AM

1

1201.50

CEUX

GENMAB A/S

07-Apr-2025

10:20:46 AM

87

1201.00

XCSE

GENMAB A/S

07-Apr-2025

10:20:46 AM

5

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:22:25 AM

83

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:22:25 AM

1

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:22:25 AM

31

1200.50

CEUX

GENMAB A/S

07-Apr-2025

10:22:37 AM

31

1201.50

AQEU

GENMAB A/S

07-Apr-2025

10:22:37 AM

4

1201.00

CEUX

GENMAB A/S

07-Apr-2025

10:22:37 AM

34

1201.00

CEUX

GENMAB A/S

07-Apr-2025

10:22:42 AM

89

1200.50

XCSE

GENMAB A/S

07-Apr-2025

10:22:55 AM

13

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:22:55 AM

11

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:22:55 AM

45

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:22:55 AM

11

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:22:55 AM

22

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:23:27 AM

83

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:25:07 AM

4

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:07 AM

79

1200.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:07 AM

24

1200.00

TQEX

GENMAB A/S

07-Apr-2025

10:25:10 AM

19

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:10 AM

55

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:10 AM

8

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:25:10 AM

35

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:25:24 AM

13

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:24 AM

46

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:25:24 AM

24

1198.50

AQEU

GENMAB A/S

07-Apr-2025

10:25:24 AM

33

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:26:24 AM

58

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:26:24 AM

4

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:26:24 AM

34

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:27:59 AM

85

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:27:59 AM

84

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:27:59 AM

24

1199.00

TQEX

GENMAB A/S

07-Apr-2025

10:27:59 AM

24

1199.00

AQEU

GENMAB A/S

07-Apr-2025

10:27:59 AM

63

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:27:59 AM

44

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:28:28 AM

67

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:28:28 AM

44

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:28:41 AM

10

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:28:41 AM

14

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:28:41 AM

1

1198.00

TQEX

GENMAB A/S

07-Apr-2025

10:28:41 AM

28

1198.00

TQEX

6


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:28:41 AM

29

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:29:23 AM

24

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:29:44 AM

85

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:29:44 AM

27

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:29:44 AM

7

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:29:55 AM

30

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:29:55 AM

34

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:29:55 AM

27

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:30:05 AM

86

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:30:05 AM

29

1197.50

CEUX

GENMAB A/S

07-Apr-2025

10:30:29 AM

28

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:30:56 AM

34

1197.50

AQEU

GENMAB A/S

07-Apr-2025

10:31:09 AM

26

1197.50

CEUX

GENMAB A/S

07-Apr-2025

10:31:10 AM

34

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:31:10 AM

26

1197.00

TQEX

GENMAB A/S

07-Apr-2025

10:31:11 AM

28

1196.50

CEUX

GENMAB A/S

07-Apr-2025

10:31:17 AM

25

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:31:56 AM

35

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:33:22 AM

8

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:35:06 AM

25

1198.00

TQEX

GENMAB A/S

07-Apr-2025

10:35:06 AM

65

1198.00

CEUX

GENMAB A/S

07-Apr-2025

10:35:09 AM

1

1198.00

CEUX

GENMAB A/S

07-Apr-2025

10:35:23 AM

88

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:35:23 AM

47

1197.00

CEUX

GENMAB A/S

07-Apr-2025

10:35:25 AM

75

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:35:27 AM

4

1196.00

CEUX

GENMAB A/S

07-Apr-2025

10:35:30 AM

33

1196.00

CEUX

GENMAB A/S

07-Apr-2025

10:35:40 AM

21

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:35:41 AM

61

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:35:41 AM

24

1196.00

CEUX

GENMAB A/S

07-Apr-2025

10:37:44 AM

12

1199.00

CEUX

GENMAB A/S

07-Apr-2025

10:37:44 AM

31

1199.00

CEUX

GENMAB A/S

07-Apr-2025

10:37:46 AM

70

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:37:46 AM

14

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:38:03 AM

85

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:38:22 AM

24

1198.00

TQEX

GENMAB A/S

07-Apr-2025

10:38:22 AM

4

1198.00

AQEU

GENMAB A/S

07-Apr-2025

10:38:22 AM

29

1198.00

CEUX

GENMAB A/S

07-Apr-2025

10:39:24 AM

31

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:39:32 AM

23

1198.00

AQEU

GENMAB A/S

07-Apr-2025

10:39:35 AM

40

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:39:56 AM

6

1197.00

CEUX

GENMAB A/S

07-Apr-2025

10:39:56 AM

19

1197.00

CEUX

7


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:40:00 AM

13

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:40:00 AM

24

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:40:00 AM

25

1196.50

TQEX

GENMAB A/S

07-Apr-2025

10:40:07 AM

21

1195.50

XCSE

GENMAB A/S

07-Apr-2025

10:40:28 AM

88

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:40:28 AM

15

1196.50

CEUX

GENMAB A/S

07-Apr-2025

10:40:28 AM

23

1196.50

CEUX

GENMAB A/S

07-Apr-2025

10:40:52 AM

75

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:40:52 AM

25

1197.00

AQEU

GENMAB A/S

07-Apr-2025

10:40:52 AM

43

1197.00

CEUX

GENMAB A/S

07-Apr-2025

10:40:52 AM

1

1197.00

CEUX

GENMAB A/S

07-Apr-2025

10:41:00 AM

64

1195.50

XCSE

GENMAB A/S

07-Apr-2025

10:41:00 AM

24

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:41:26 AM

87

1194.50

XCSE

GENMAB A/S

07-Apr-2025

10:41:26 AM

26

1194.50

CEUX

GENMAB A/S

07-Apr-2025

10:42:09 AM

15

1196.00

TQEX

GENMAB A/S

07-Apr-2025

10:43:53 AM

28

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:43:53 AM

39

1197.50

XCSE

GENMAB A/S

07-Apr-2025

10:44:00 AM

56

1196.50

XCSE

GENMAB A/S

07-Apr-2025

10:44:00 AM

35

1196.50

CEUX

GENMAB A/S

07-Apr-2025

10:44:33 AM

37

1195.50

XCSE

GENMAB A/S

07-Apr-2025

10:44:33 AM

29

1196.50

AQEU

GENMAB A/S

07-Apr-2025

10:44:33 AM

25

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:45:28 AM

60

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:45:28 AM

20

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:45:50 AM

63

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:45:50 AM

26

1196.50

TQEX

GENMAB A/S

07-Apr-2025

10:45:50 AM

53

1196.50

CEUX

GENMAB A/S

07-Apr-2025

10:45:50 AM

44

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:46:00 AM

62

1195.00

XCSE

GENMAB A/S

07-Apr-2025

10:46:00 AM

27

1194.50

CEUX

GENMAB A/S

07-Apr-2025

10:46:35 AM

24

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:47:34 AM

53

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:47:42 AM

11

1196.00

XCSE

GENMAB A/S

07-Apr-2025

10:48:00 AM

1

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:48:00 AM

25

1195.50

CEUX

GENMAB A/S

07-Apr-2025

10:48:18 AM

45

1195.00

AQEU

GENMAB A/S

07-Apr-2025

10:49:46 AM

28

1196.50

TQEX

GENMAB A/S

07-Apr-2025

10:49:46 AM

49

1197.00

CEUX

GENMAB A/S

07-Apr-2025

10:52:02 AM

113

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:52:28 AM

16

1199.50

TQEX

GENMAB A/S

07-Apr-2025

10:53:14 AM

25

1201.00

XCSE

GENMAB A/S

07-Apr-2025

10:53:14 AM

42

1201.00

XCSE

8


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

10:53:14 AM

30

1201.00

XCSE

GENMAB A/S

07-Apr-2025

10:54:50 AM

50

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:54:50 AM

20

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:54:50 AM

1

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:54:50 AM

73

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:54:53 AM

32

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:54:53 AM

16

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:55:13 AM

5

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:55:13 AM

11

1199.50

XCSE

GENMAB A/S

07-Apr-2025

10:55:26 AM

71

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:55:50 AM

19

1199.50

CEUX

GENMAB A/S

07-Apr-2025

10:55:55 AM

80

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:55:55 AM

3

1199.00

XCSE

GENMAB A/S

07-Apr-2025

10:55:55 AM

24

1199.00

AQEU

GENMAB A/S

07-Apr-2025

10:56:09 AM

24

1198.50

TQEX

GENMAB A/S

07-Apr-2025

10:56:09 AM

3

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:56:09 AM

78

1198.50

CEUX

GENMAB A/S

07-Apr-2025

10:56:33 AM

90

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:56:33 AM

39

1198.50

XCSE

GENMAB A/S

07-Apr-2025

10:56:38 AM

33

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:56:52 AM

51

1198.00

XCSE

GENMAB A/S

07-Apr-2025

10:56:54 AM

47

1197.50

CEUX

GENMAB A/S

07-Apr-2025

10:56:54 AM

20

1197.50

CEUX

GENMAB A/S

07-Apr-2025

10:58:21 AM

56

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:58:21 AM

34

1197.00

XCSE

GENMAB A/S

07-Apr-2025

10:58:21 AM

26

1197.00

TQEX

GENMAB A/S

07-Apr-2025

10:58:26 AM

44

1196.50

AQEU

GENMAB A/S

07-Apr-2025

11:00:08 AM

87

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:00:45 AM

83

1198.00

CEUX

GENMAB A/S

07-Apr-2025

11:00:48 AM

85

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:00:48 AM

24

1197.50

TQEX

GENMAB A/S

07-Apr-2025

11:01:27 AM

14

1197.00

CEUX

GENMAB A/S

07-Apr-2025

11:01:59 AM

90

1196.50

XCSE

GENMAB A/S

07-Apr-2025

11:01:59 AM

27

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:01:59 AM

57

1197.00

CEUX

GENMAB A/S

07-Apr-2025

11:02:30 AM

17

1195.50

XCSE

GENMAB A/S

07-Apr-2025

11:02:30 AM

66

1195.50

XCSE

GENMAB A/S

07-Apr-2025

11:02:30 AM

33

1196.00

CEUX

GENMAB A/S

07-Apr-2025

11:02:43 AM

24

1195.50

TQEX

GENMAB A/S

07-Apr-2025

11:04:31 AM

13

1195.50

XCSE

GENMAB A/S

07-Apr-2025

11:04:31 AM

75

1195.50

XCSE

GENMAB A/S

07-Apr-2025

11:04:31 AM

24

1195.50

AQEU

GENMAB A/S

07-Apr-2025

11:04:34 AM

42

1195.00

CEUX

9


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

11:04:37 AM

76

1194.50

XCSE

GENMAB A/S

07-Apr-2025

11:04:37 AM

9

1194.50

XCSE

GENMAB A/S

07-Apr-2025

11:04:51 AM

4

1194.00

CEUX

GENMAB A/S

07-Apr-2025

11:04:51 AM

1

1194.00

CEUX

GENMAB A/S

07-Apr-2025

11:05:03 AM

4

1193.00

XCSE

GENMAB A/S

07-Apr-2025

11:05:03 AM

43

1194.00

CEUX

GENMAB A/S

07-Apr-2025

11:05:11 AM

1

1193.00

XCSE

GENMAB A/S

07-Apr-2025

11:06:00 AM

84

1193.00

XCSE

GENMAB A/S

07-Apr-2025

11:06:00 AM

49

1193.00

CEUX

GENMAB A/S

07-Apr-2025

11:06:15 AM

25

1192.50

TQEX

GENMAB A/S

07-Apr-2025

11:06:45 AM

85

1192.00

XCSE

GENMAB A/S

07-Apr-2025

11:06:45 AM

1

1191.50

CEUX

GENMAB A/S

07-Apr-2025

11:06:45 AM

56

1191.50

CEUX

GENMAB A/S

07-Apr-2025

11:06:59 AM

84

1194.50

XCSE

GENMAB A/S

07-Apr-2025

11:06:59 AM

10

1194.00

AQEU

GENMAB A/S

07-Apr-2025

11:06:59 AM

10

1194.50

CEUX

GENMAB A/S

07-Apr-2025

11:06:59 AM

31

1194.50

CEUX

GENMAB A/S

07-Apr-2025

11:06:59 AM

30

1194.50

CEUX

GENMAB A/S

07-Apr-2025

11:07:27 AM

89

1194.50

XCSE

GENMAB A/S

07-Apr-2025

11:07:27 AM

25

1194.50

CEUX

GENMAB A/S

07-Apr-2025

11:09:47 AM

83

1194.50

XCSE

GENMAB A/S

07-Apr-2025

11:09:48 AM

16

1195.50

TQEX

GENMAB A/S

07-Apr-2025

11:10:37 AM

6

1196.00

CEUX

GENMAB A/S

07-Apr-2025

11:10:37 AM

49

1196.00

CEUX

GENMAB A/S

07-Apr-2025

11:11:44 AM

55

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:11:57 AM

40

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:11:57 AM

21

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:11:57 AM

7

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:12:57 AM

21

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:12:57 AM

23

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:13:10 AM

1

1198.00

XCSE

GENMAB A/S

07-Apr-2025

11:13:25 AM

87

1198.00

XCSE

GENMAB A/S

07-Apr-2025

11:13:25 AM

25

1198.00

TQEX

GENMAB A/S

07-Apr-2025

11:13:29 AM

4

1198.00

AQEU

GENMAB A/S

07-Apr-2025

11:13:31 AM

25

1198.00

AQEU

GENMAB A/S

07-Apr-2025

11:13:38 AM

53

1197.50

CEUX

GENMAB A/S

07-Apr-2025

11:14:54 AM

20

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:15:01 AM

88

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:15:01 AM

5

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:15:01 AM

12

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:15:27 AM

40

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:15:27 AM

30

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:15:27 AM

12

1197.00

XCSE

10


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

11:16:31 AM

26

1196.50

XCSE

GENMAB A/S

07-Apr-2025

11:16:31 AM

24

1196.00

TQEX

GENMAB A/S

07-Apr-2025

11:16:31 AM

26

1196.00

AQEU

GENMAB A/S

07-Apr-2025

11:16:31 AM

28

1196.00

CEUX

GENMAB A/S

07-Apr-2025

11:16:45 AM

85

1195.50

XCSE

GENMAB A/S

07-Apr-2025

11:17:21 AM

83

1197.00

XCSE

GENMAB A/S

07-Apr-2025

11:17:32 AM

16

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:17:56 AM

74

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:18:11 AM

35

1197.00

CEUX

GENMAB A/S

07-Apr-2025

11:18:26 AM

26

1198.00

TQEX

GENMAB A/S

07-Apr-2025

11:18:26 AM

39

1198.00

CEUX

GENMAB A/S

07-Apr-2025

11:18:26 AM

26

1198.00

CEUX

GENMAB A/S

07-Apr-2025

11:18:50 AM

10

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:18:50 AM

75

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:19:15 AM

12

1197.00

AQEU

GENMAB A/S

07-Apr-2025

11:19:15 AM

35

1197.00

CEUX

GENMAB A/S

07-Apr-2025

11:20:26 AM

89

1196.00

XCSE

GENMAB A/S

07-Apr-2025

11:20:26 AM

68

1196.00

CEUX

GENMAB A/S

07-Apr-2025

11:21:28 AM

21

1196.00

TQEX

GENMAB A/S

07-Apr-2025

11:21:28 AM

5

1196.00

TQEX

GENMAB A/S

07-Apr-2025

11:21:28 AM

30

1196.00

AQEU

GENMAB A/S

07-Apr-2025

11:22:28 AM

32

1196.50

XCSE

GENMAB A/S

07-Apr-2025

11:22:28 AM

16

1196.50

XCSE

GENMAB A/S

07-Apr-2025

11:23:57 AM

70

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:23:57 AM

18

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:23:57 AM

24

1197.50

TQEX

GENMAB A/S

07-Apr-2025

11:23:57 AM

75

1197.50

CEUX

GENMAB A/S

07-Apr-2025

11:24:28 AM

10

1198.00

XCSE

GENMAB A/S

07-Apr-2025

11:24:28 AM

74

1198.00

XCSE

GENMAB A/S

07-Apr-2025

11:25:44 AM

12

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:26:46 AM

40

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:26:46 AM

65

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:26:46 AM

8

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:26:59 AM

7

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:27:23 AM

16

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:27:27 AM

70

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:27:27 AM

83

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:27:46 AM

75

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:27:46 AM

24

1198.00

TQEX

GENMAB A/S

07-Apr-2025

11:27:46 AM

27

1197.50

AQEU

GENMAB A/S

07-Apr-2025

11:27:46 AM

63

1197.50

CEUX

GENMAB A/S

07-Apr-2025

11:30:05 AM

5

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:31:38 AM

25

1198.00

AQEU

11


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

11:31:41 AM

89

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:32:00 AM

44

1197.50

TQEX

GENMAB A/S

07-Apr-2025

11:32:28 AM

34

1199.00

CEUX

GENMAB A/S

07-Apr-2025

11:32:28 AM

36

1199.00

CEUX

GENMAB A/S

07-Apr-2025

11:33:27 AM

83

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:33:27 AM

43

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:33:27 AM

11

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:33:27 AM

24

1199.50

AQEU

GENMAB A/S

07-Apr-2025

11:35:26 AM

28

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:26 AM

16

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:26 AM

40

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:26 AM

11

1199.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:26 AM

18

1199.00

CEUX

GENMAB A/S

07-Apr-2025

11:35:36 AM

89

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:36 AM

85

1197.50

XCSE

GENMAB A/S

07-Apr-2025

11:35:36 AM

25

1199.00

AQEU

GENMAB A/S

07-Apr-2025

11:35:36 AM

48

1199.00

CEUX

GENMAB A/S

07-Apr-2025

11:35:36 AM

38

1199.00

CEUX

GENMAB A/S

07-Apr-2025

11:37:41 AM

12

1199.00

TQEX

GENMAB A/S

07-Apr-2025

11:37:41 AM

19

1199.50

CEUX

GENMAB A/S

07-Apr-2025

11:37:41 AM

69

1199.50

CEUX

GENMAB A/S

07-Apr-2025

11:38:09 AM

26

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:09 AM

30

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:09 AM

16

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:09 AM

40

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

81

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

9

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

40

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

4

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

10

1198.50

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

26

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

30

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

3

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:38:12 AM

90

1198.50

CEUX

GENMAB A/S

07-Apr-2025

11:38:45 AM

85

1197.50

CEUX

GENMAB A/S

07-Apr-2025

11:40:31 AM

34

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:40:32 AM

5

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:40:32 AM

46

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:40:32 AM

27

1199.00

TQEX

GENMAB A/S

07-Apr-2025

11:40:55 AM

46

1199.00

AQEU

GENMAB A/S

07-Apr-2025

11:41:08 AM

40

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:41:08 AM

30

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:41:08 AM

16

1199.00

XCSE

12


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

11:41:08 AM

15

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:41:47 AM

16

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:41:47 AM

47

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:41:59 AM

10

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:42:00 AM

2

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:42:00 AM

15

1199.00

XCSE

GENMAB A/S

07-Apr-2025

11:42:08 AM

43

1199.50

CEUX

GENMAB A/S

07-Apr-2025

11:42:08 AM

37

1199.50

CEUX

GENMAB A/S

07-Apr-2025

11:43:21 AM

36

1200.00

XCSE

GENMAB A/S

07-Apr-2025

11:44:00 AM

71

1199.50

CEUX

GENMAB A/S

07-Apr-2025

11:45:30 AM

40

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:45:30 AM

11

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:45:30 AM

76

1200.50

CEUX

GENMAB A/S

07-Apr-2025

11:46:16 AM

87

1202.00

XCSE

GENMAB A/S

07-Apr-2025

11:46:16 AM

26

1202.00

XCSE

GENMAB A/S

07-Apr-2025

11:46:18 AM

83

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:46:18 AM

29

1201.00

TQEX

GENMAB A/S

07-Apr-2025

11:46:50 AM

47

1200.50

CEUX

GENMAB A/S

07-Apr-2025

11:47:01 AM

84

1200.00

XCSE

GENMAB A/S

07-Apr-2025

11:47:01 AM

28

1200.00

TQEX

GENMAB A/S

07-Apr-2025

11:48:27 AM

83

1201.50

XCSE

GENMAB A/S

07-Apr-2025

11:48:27 AM

62

1201.50

CEUX

GENMAB A/S

07-Apr-2025

11:48:27 AM

26

1202.00

CEUX

GENMAB A/S

07-Apr-2025

11:49:27 AM

24

1202.50

CEUX

GENMAB A/S

07-Apr-2025

11:49:37 AM

40

1203.00

XCSE

GENMAB A/S

07-Apr-2025

11:49:37 AM

4

1203.00

XCSE

GENMAB A/S

07-Apr-2025

11:50:02 AM

83

1202.00

XCSE

GENMAB A/S

07-Apr-2025

11:50:02 AM

34

1202.00

AQEU

GENMAB A/S

07-Apr-2025

11:50:02 AM

13

1202.00

AQEU

GENMAB A/S

07-Apr-2025

11:50:37 AM

23

1202.00

XCSE

GENMAB A/S

07-Apr-2025

11:50:54 AM

66

1202.00

XCSE

GENMAB A/S

07-Apr-2025

11:51:35 AM

47

1201.50

CEUX

GENMAB A/S

07-Apr-2025

11:51:39 AM

87

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:52:06 AM

50

1200.50

CEUX

GENMAB A/S

07-Apr-2025

11:53:27 AM

87

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:53:51 AM

1

1201.00

TQEX

GENMAB A/S

07-Apr-2025

11:53:51 AM

32

1201.00

TQEX

GENMAB A/S

07-Apr-2025

11:53:52 AM

1

1200.50

CEUX

GENMAB A/S

07-Apr-2025

11:53:52 AM

41

1200.50

CEUX

GENMAB A/S

07-Apr-2025

11:55:08 AM

86

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:55:28 AM

83

1201.00

XCSE

GENMAB A/S

07-Apr-2025

11:55:32 AM

3

1206.50

XCSE

GENMAB A/S

07-Apr-2025

11:55:32 AM

34

1206.50

XCSE

13


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

11:55:32 AM

1

1206.50

XCSE

GENMAB A/S

07-Apr-2025

11:55:32 AM

22

1206.50

XCSE

GENMAB A/S

07-Apr-2025

11:55:32 AM

27

1206.50

XCSE

GENMAB A/S

07-Apr-2025

11:55:32 AM

1

1206.00

CEUX

GENMAB A/S

07-Apr-2025

11:55:32 AM

18

1206.00

CEUX

GENMAB A/S

07-Apr-2025

11:55:34 AM

89

1205.50

XCSE

GENMAB A/S

07-Apr-2025

11:55:34 AM

38

1206.00

CEUX

GENMAB A/S

07-Apr-2025

11:56:02 AM

54

1208.00

XCSE

GENMAB A/S

07-Apr-2025

11:56:02 AM

43

1208.00

CEUX

GENMAB A/S

07-Apr-2025

11:56:22 AM

54

1207.00

XCSE

GENMAB A/S

07-Apr-2025

11:56:22 AM

44

1207.00

CEUX

GENMAB A/S

07-Apr-2025

11:56:48 AM

24

1206.50

TQEX

GENMAB A/S

07-Apr-2025

11:57:31 AM

24

1206.00

XCSE

GENMAB A/S

07-Apr-2025

11:57:31 AM

24

1206.00

CEUX

GENMAB A/S

07-Apr-2025

11:57:48 AM

49

1205.50

XCSE

GENMAB A/S

07-Apr-2025

11:57:54 AM

40

1206.00

XCSE

GENMAB A/S

07-Apr-2025

11:58:43 AM

42

1204.50

XCSE

GENMAB A/S

07-Apr-2025

11:58:43 AM

27

1204.50

CEUX

GENMAB A/S

07-Apr-2025

11:59:49 AM

37

1205.00

XCSE

GENMAB A/S

07-Apr-2025

12:00:21 PM

20

1205.50

TQEX

GENMAB A/S

07-Apr-2025

12:00:21 PM

30

1205.50

AQEU

GENMAB A/S

07-Apr-2025

12:00:23 PM

1

1205.00

CEUX

GENMAB A/S

07-Apr-2025

12:00:25 PM

2

1205.00

CEUX

GENMAB A/S

07-Apr-2025

12:01:22 PM

11

1205.00

XCSE

GENMAB A/S

07-Apr-2025

12:01:30 PM

22

1205.00

CEUX

GENMAB A/S

07-Apr-2025

12:01:30 PM

18

1205.00

CEUX

GENMAB A/S

07-Apr-2025

12:03:28 PM

88

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:03:28 PM

24

1217.00

TQEX

GENMAB A/S

07-Apr-2025

12:03:28 PM

68

1216.50

CEUX

GENMAB A/S

07-Apr-2025

12:03:28 PM

31

1217.00

AQEU

GENMAB A/S

07-Apr-2025

12:03:43 PM

88

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:03:55 PM

44

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:03:55 PM

15

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:04:24 PM

78

1221.50

XCSE

GENMAB A/S

07-Apr-2025

12:04:24 PM

64

1221.00

CEUX

GENMAB A/S

07-Apr-2025

12:04:27 PM

7

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:04:27 PM

11

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:04:27 PM

50

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:04:27 PM

66

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:04:36 PM

27

1220.00

XCSE

GENMAB A/S

07-Apr-2025

12:04:46 PM

31

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:04:52 PM

24

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:05:00 PM

24

1217.50

XCSE

14


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

12:05:02 PM

24

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:05:29 PM

24

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:05:29 PM

29

1218.50

CEUX

GENMAB A/S

07-Apr-2025

12:06:06 PM

24

1220.00

XCSE

GENMAB A/S

07-Apr-2025

12:06:20 PM

27

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:06:24 PM

25

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:06:58 PM

28

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:06:58 PM

29

1218.00

TQEX

GENMAB A/S

07-Apr-2025

12:06:58 PM

24

1218.50

CEUX

GENMAB A/S

07-Apr-2025

12:07:16 PM

29

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:07:47 PM

26

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:07:48 PM

46

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:07:49 PM

24

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:07:49 PM

24

1219.50

AQEU

GENMAB A/S

07-Apr-2025

12:08:57 PM

31

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:10:01 PM

27

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:10:06 PM

24

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:10:06 PM

24

1218.50

CEUX

GENMAB A/S

07-Apr-2025

12:11:32 PM

55

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:11:32 PM

24

1219.50

TQEX

GENMAB A/S

07-Apr-2025

12:11:32 PM

24

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:11:35 PM

60

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:11:35 PM

28

1218.50

CEUX

GENMAB A/S

07-Apr-2025

12:12:14 PM

24

1220.00

AQEU

GENMAB A/S

07-Apr-2025

12:12:37 PM

40

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:12:37 PM

11

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:12:37 PM

24

1220.50

CEUX

GENMAB A/S

07-Apr-2025

12:12:52 PM

5

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:12:52 PM

41

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:12:52 PM

26

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:12:56 PM

36

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:13:32 PM

28

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:13:32 PM

8

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:14:22 PM

28

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:14:22 PM

24

1219.00

TQEX

GENMAB A/S

07-Apr-2025

12:14:22 PM

4

1219.00

TQEX

GENMAB A/S

07-Apr-2025

12:15:28 PM

55

1220.00

XCSE

GENMAB A/S

07-Apr-2025

12:15:39 PM

56

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:15:39 PM

36

1219.00

CEUX

GENMAB A/S

07-Apr-2025

12:16:49 PM

27

1220.50

CEUX

GENMAB A/S

07-Apr-2025

12:17:06 PM

24

1220.00

AQEU

GENMAB A/S

07-Apr-2025

12:17:26 PM

69

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:18:40 PM

48

1220.50

CEUX

15


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

12:19:00 PM

33

1220.50

CEUX

GENMAB A/S

07-Apr-2025

12:19:22 PM

1

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:19:22 PM

24

1220.00

TQEX

GENMAB A/S

07-Apr-2025

12:19:49 PM

43

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:19:49 PM

32

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:20:05 PM

9

1220.50

CEUX

GENMAB A/S

07-Apr-2025

12:20:05 PM

15

1220.50

CEUX

GENMAB A/S

07-Apr-2025

12:20:52 PM

1

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:20:52 PM

80

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:20:52 PM

26

1221.00

CEUX

GENMAB A/S

07-Apr-2025

12:20:52 PM

24

1220.50

AQEU

GENMAB A/S

07-Apr-2025

12:22:33 PM

46

1220.00

TQEX

GENMAB A/S

07-Apr-2025

12:22:34 PM

75

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:22:34 PM

27

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:22:36 PM

29

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:24:00 PM

75

1220.00

XCSE

GENMAB A/S

07-Apr-2025

12:24:00 PM

24

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:24:26 PM

31

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:25:13 PM

33

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:25:13 PM

12

1220.50

XCSE

GENMAB A/S

07-Apr-2025

12:25:13 PM

34

1220.00

CEUX

GENMAB A/S

07-Apr-2025

12:25:15 PM

82

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:25:40 PM

26

1219.00

CEUX

GENMAB A/S

07-Apr-2025

12:25:40 PM

24

1219.00

AQEU

GENMAB A/S

07-Apr-2025

12:26:17 PM

80

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:26:17 PM

25

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:26:26 PM

58

1217.50

XCSE

GENMAB A/S

07-Apr-2025

12:26:36 PM

30

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:27:10 PM

10

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:27:10 PM

10

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:27:10 PM

20

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:27:10 PM

32

1219.00

CEUX

GENMAB A/S

07-Apr-2025

12:27:20 PM

25

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:27:48 PM

34

1220.00

XCSE

GENMAB A/S

07-Apr-2025

12:28:03 PM

25

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:29:28 PM

26

1219.50

CEUX

GENMAB A/S

07-Apr-2025

12:30:00 PM

45

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:30:00 PM

45

1218.50

TQEX

GENMAB A/S

07-Apr-2025

12:30:00 PM

24

1218.50

CEUX

GENMAB A/S

07-Apr-2025

12:30:00 PM

24

1218.50

AQEU

GENMAB A/S

07-Apr-2025

12:31:00 PM

10

1218.00

XCSE

GENMAB A/S

07-Apr-2025

12:31:00 PM

29

1218.00

XCSE

GENMAB A/S

07-Apr-2025

12:31:00 PM

25

1218.00

CEUX

16


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

12:31:01 PM

27

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:31:26 PM

33

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:33:40 PM

65

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:33:40 PM

20

1215.50

XCSE

GENMAB A/S

07-Apr-2025

12:33:40 PM

6

1215.50

XCSE

GENMAB A/S

07-Apr-2025

12:33:40 PM

24

1216.50

CEUX

GENMAB A/S

07-Apr-2025

12:33:42 PM

20

1215.50

XCSE

GENMAB A/S

07-Apr-2025

12:34:54 PM

88

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:35:00 PM

16

1217.50

XCSE

GENMAB A/S

07-Apr-2025

12:35:00 PM

53

1217.50

XCSE

GENMAB A/S

07-Apr-2025

12:35:00 PM

30

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:35:00 PM

24

1218.00

AQEU

GENMAB A/S

07-Apr-2025

12:35:23 PM

30

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:35:24 PM

67

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:35:24 PM

1

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:35:30 PM

30

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:35:35 PM

28

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:35:56 PM

25

1216.50

CEUX

GENMAB A/S

07-Apr-2025

12:36:44 PM

7

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:36:44 PM

24

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:36:44 PM

24

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:39:16 PM

81

1219.00

XCSE

GENMAB A/S

07-Apr-2025

12:39:16 PM

32

1219.00

CEUX

GENMAB A/S

07-Apr-2025

12:39:16 PM

46

1219.00

AQEU

GENMAB A/S

07-Apr-2025

12:39:34 PM

24

1219.50

XCSE

GENMAB A/S

07-Apr-2025

12:39:34 PM

24

1219.50

TQEX

GENMAB A/S

07-Apr-2025

12:40:29 PM

34

1219.00

CEUX

GENMAB A/S

07-Apr-2025

12:40:46 PM

75

1218.00

XCSE

GENMAB A/S

07-Apr-2025

12:40:46 PM

25

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:41:51 PM

59

1218.00

XCSE

GENMAB A/S

07-Apr-2025

12:41:51 PM

1

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:41:51 PM

23

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:42:07 PM

44

1218.00

TQEX

GENMAB A/S

07-Apr-2025

12:44:32 PM

88

1218.00

XCSE

GENMAB A/S

07-Apr-2025

12:45:03 PM

56

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:45:03 PM

31

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:45:23 PM

24

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:45:23 PM

26

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:46:58 PM

39

1217.50

CEUX

GENMAB A/S

07-Apr-2025

12:47:02 PM

61

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:47:02 PM

13

1217.00

XCSE

GENMAB A/S

07-Apr-2025

12:47:02 PM

40

1216.50

CEUX

GENMAB A/S

07-Apr-2025

12:48:26 PM

78

1217.00

XCSE

17


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

12:48:26 PM

25

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:48:45 PM

64

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:48:45 PM

24

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:49:39 PM

46

1216.50

AQEU

GENMAB A/S

07-Apr-2025

12:49:46 PM

5

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:50:50 PM

70

1216.00

XCSE

GENMAB A/S

07-Apr-2025

12:50:50 PM

24

1216.00

TQEX

GENMAB A/S

07-Apr-2025

12:50:50 PM

33

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:52:33 PM

32

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:52:33 PM

55

1218.50

XCSE

GENMAB A/S

07-Apr-2025

12:52:55 PM

46

1218.00

CEUX

GENMAB A/S

07-Apr-2025

12:53:11 PM

2

1217.50

XCSE

GENMAB A/S

07-Apr-2025

12:53:11 PM

83

1217.50

XCSE

GENMAB A/S

07-Apr-2025

12:53:26 PM

35

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:54:05 PM

28

1217.00

CEUX

GENMAB A/S

07-Apr-2025

12:54:08 PM

83

1216.50

XCSE

GENMAB A/S

07-Apr-2025

12:55:14 PM

24

1216.00

TQEX

GENMAB A/S

07-Apr-2025

12:55:14 PM

1

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:55:14 PM

27

1216.00

CEUX

GENMAB A/S

07-Apr-2025

12:56:19 PM

32

1216.50

CEUX

GENMAB A/S

07-Apr-2025

12:57:04 PM

57

1215.50

XCSE

GENMAB A/S

07-Apr-2025

12:57:09 PM

24

1215.00

CEUX

GENMAB A/S

07-Apr-2025

12:57:42 PM

89

1215.50

XCSE

GENMAB A/S

07-Apr-2025

12:57:42 PM

35

1215.50

CEUX

GENMAB A/S

07-Apr-2025

12:58:07 PM

31

1214.50

XCSE

GENMAB A/S

07-Apr-2025

12:58:07 PM

32

1214.50

CEUX

GENMAB A/S

07-Apr-2025

12:58:45 PM

28

1214.50

CEUX

GENMAB A/S

07-Apr-2025

13:00:06 PM

10

1216.00

XCSE

GENMAB A/S

07-Apr-2025

13:00:06 PM

1

1216.00

XCSE

GENMAB A/S

07-Apr-2025

13:00:06 PM

78

1216.00

XCSE

GENMAB A/S

07-Apr-2025

13:00:07 PM

47

1215.50

TQEX

GENMAB A/S

07-Apr-2025

13:00:07 PM

25

1215.50

CEUX

GENMAB A/S

07-Apr-2025

13:00:07 PM

46

1215.50

AQEU

GENMAB A/S

07-Apr-2025

13:00:27 PM

4

1215.00

XCSE

GENMAB A/S

07-Apr-2025

13:00:27 PM

83

1215.00

XCSE

GENMAB A/S

07-Apr-2025

13:01:33 PM

89

1214.00

XCSE

GENMAB A/S

07-Apr-2025

13:01:33 PM

25

1214.50

CEUX

GENMAB A/S

07-Apr-2025

13:03:28 PM

40

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:03:28 PM

12

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:03:28 PM

23

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:03:28 PM

11

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:03:56 PM

70

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:06:21 PM

70

1217.50

CEUX

18


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

13:06:34 PM

13

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:07:29 PM

58

1217.50

CEUX

GENMAB A/S

07-Apr-2025

13:07:57 PM

10

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:09:27 PM

39

1220.00

XCSE

GENMAB A/S

07-Apr-2025

13:09:27 PM

23

1220.00

XCSE

GENMAB A/S

07-Apr-2025

13:09:27 PM

30

1220.00

XCSE

GENMAB A/S

07-Apr-2025

13:09:54 PM

83

1219.00

XCSE

GENMAB A/S

07-Apr-2025

13:09:54 PM

35

1219.50

TQEX

GENMAB A/S

07-Apr-2025

13:09:54 PM

57

1219.00

CEUX

GENMAB A/S

07-Apr-2025

13:09:54 PM

44

1219.50

AQEU

GENMAB A/S

07-Apr-2025

13:10:56 PM

89

1218.00

XCSE

GENMAB A/S

07-Apr-2025

13:10:56 PM

61

1218.00

CEUX

GENMAB A/S

07-Apr-2025

13:11:01 PM

25

1217.50

CEUX

GENMAB A/S

07-Apr-2025

13:11:11 PM

60

1217.00

XCSE

GENMAB A/S

07-Apr-2025

13:11:11 PM

41

1216.50

XCSE

GENMAB A/S

07-Apr-2025

13:11:11 PM

42

1216.50

XCSE

GENMAB A/S

07-Apr-2025

13:11:11 PM

43

1216.50

CEUX

GENMAB A/S

07-Apr-2025

13:11:15 PM

87

1215.50

XCSE

GENMAB A/S

07-Apr-2025

13:11:15 PM

46

1215.50

CEUX

GENMAB A/S

07-Apr-2025

13:11:56 PM

43

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:11:56 PM

46

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:12:05 PM

46

1213.00

XCSE

GENMAB A/S

07-Apr-2025

13:13:18 PM

9

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:13:18 PM

31

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:13:18 PM

9

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:13:18 PM

16

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:14:50 PM

34

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:14:50 PM

30

1213.50

TQEX

GENMAB A/S

07-Apr-2025

13:14:50 PM

14

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:14:50 PM

13

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:15:54 PM

30

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:15:54 PM

25

1213.50

AQEU

GENMAB A/S

07-Apr-2025

13:19:04 PM

90

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:19:04 PM

25

1214.00

TQEX

GENMAB A/S

07-Apr-2025

13:19:04 PM

19

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:20:12 PM

63

1214.50

CEUX

GENMAB A/S

07-Apr-2025

13:20:20 PM

24

1215.00

TQEX

GENMAB A/S

07-Apr-2025

13:20:20 PM

21

1215.00

CEUX

GENMAB A/S

07-Apr-2025

13:20:21 PM

25

1215.00

CEUX

GENMAB A/S

07-Apr-2025

13:20:34 PM

88

1215.00

XCSE

GENMAB A/S

07-Apr-2025

13:20:34 PM

4

1215.00

CEUX

GENMAB A/S

07-Apr-2025

13:20:34 PM

47

1215.00

AQEU

GENMAB A/S

07-Apr-2025

13:20:42 PM

12

1214.00

XCSE

19


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

13:20:42 PM

58

1214.00

XCSE

GENMAB A/S

07-Apr-2025

13:20:42 PM

15

1214.00

XCSE

GENMAB A/S

07-Apr-2025

13:20:43 PM

34

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:20:43 PM

11

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:21:03 PM

4

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:22:54 PM

33

1214.00

CEUX

GENMAB A/S

07-Apr-2025

13:23:12 PM

31

1214.00

CEUX

GENMAB A/S

07-Apr-2025

13:24:09 PM

26

1214.00

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

40

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

30

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

26

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

4

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

13

1214.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

79

1213.50

XCSE

GENMAB A/S

07-Apr-2025

13:25:05 PM

44

1214.00

TQEX

GENMAB A/S

07-Apr-2025

13:25:05 PM

46

1214.00

CEUX

GENMAB A/S

07-Apr-2025

13:25:07 PM

33

1213.50

CEUX

GENMAB A/S

07-Apr-2025

13:25:34 PM

25

1212.50

CEUX

GENMAB A/S

07-Apr-2025

13:25:46 PM

34

1212.50

XCSE

GENMAB A/S

07-Apr-2025

13:26:45 PM

2

1212.50

XCSE

GENMAB A/S

07-Apr-2025

13:26:45 PM

84

1212.50

XCSE

GENMAB A/S

07-Apr-2025

13:26:45 PM

27

1212.50

CEUX

GENMAB A/S

07-Apr-2025

13:28:57 PM

39

1212.50

CEUX

GENMAB A/S

07-Apr-2025

13:29:00 PM

86

1212.00

XCSE

GENMAB A/S

07-Apr-2025

13:29:00 PM

25

1211.50

CEUX

GENMAB A/S

07-Apr-2025

13:29:41 PM

88

1211.00

XCSE

GENMAB A/S

07-Apr-2025

13:29:44 PM

3

1210.50

CEUX

GENMAB A/S

07-Apr-2025

13:29:44 PM

21

1210.50

CEUX

GENMAB A/S

07-Apr-2025

13:29:44 PM

2

1210.50

CEUX

GENMAB A/S

07-Apr-2025

13:30:01 PM

90

1210.00

XCSE

GENMAB A/S

07-Apr-2025

13:30:01 PM

8

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:30:02 PM

28

1209.00

CEUX

GENMAB A/S

07-Apr-2025

13:30:03 PM

1

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:30:03 PM

1

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:30:03 PM

80

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:32:09 PM

25

1209.00

TQEX

GENMAB A/S

07-Apr-2025

13:33:42 PM

21

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:33:42 PM

68

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:35:14 PM

84

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:35:14 PM

42

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:35:14 PM

10

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:35:14 PM

28

1208.50

AQEU

GENMAB A/S

07-Apr-2025

13:35:37 PM

20

1208.50

CEUX

20


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

13:35:37 PM

40

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:36:02 PM

87

1210.00

XCSE

GENMAB A/S

07-Apr-2025

13:36:02 PM

24

1210.00

TQEX

GENMAB A/S

07-Apr-2025

13:36:52 PM

34

1209.50

CEUX

GENMAB A/S

07-Apr-2025

13:37:17 PM

23

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:37:17 PM

23

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:37:17 PM

37

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:37:28 PM

37

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:38:09 PM

85

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:38:09 PM

30

1207.50

CEUX

GENMAB A/S

07-Apr-2025

13:38:09 PM

31

1207.50

AQEU

GENMAB A/S

07-Apr-2025

13:38:13 PM

83

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:41:20 PM

83

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:41:20 PM

44

1209.50

TQEX

GENMAB A/S

07-Apr-2025

13:41:20 PM

58

1209.50

CEUX

GENMAB A/S

07-Apr-2025

13:41:21 PM

51

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:41:41 PM

3

1208.00

AQEU

GENMAB A/S

07-Apr-2025

13:41:44 PM

50

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:41:44 PM

35

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:41:44 PM

27

1208.00

AQEU

GENMAB A/S

07-Apr-2025

13:43:21 PM

9

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:43:59 PM

83

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:44:08 PM

14

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:44:52 PM

40

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:45:00 PM

21

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:45:00 PM

53

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:45:17 PM

22

1207.50

CEUX

GENMAB A/S

07-Apr-2025

13:45:17 PM

16

1207.50

CEUX

GENMAB A/S

07-Apr-2025

13:45:48 PM

28

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:46:10 PM

45

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:46:13 PM

11

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:46:24 PM

20

1206.50

AQEU

GENMAB A/S

07-Apr-2025

13:49:06 PM

24

1209.50

XCSE

GENMAB A/S

07-Apr-2025

13:49:06 PM

54

1209.50

XCSE

GENMAB A/S

07-Apr-2025

13:49:06 PM

11

1209.50

XCSE

GENMAB A/S

07-Apr-2025

13:49:06 PM

70

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:49:06 PM

27

1209.00

XCSE

GENMAB A/S

07-Apr-2025

13:49:06 PM

24

1209.00

TQEX

GENMAB A/S

07-Apr-2025

13:49:06 PM

63

1208.50

CEUX

GENMAB A/S

07-Apr-2025

13:49:06 PM

24

1209.00

AQEU

GENMAB A/S

07-Apr-2025

13:49:14 PM

7

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:49:14 PM

79

1208.00

XCSE

GENMAB A/S

07-Apr-2025

13:49:22 PM

24

1207.50

TQEX

21


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

13:49:22 PM

53

1207.50

CEUX

GENMAB A/S

07-Apr-2025

13:50:27 PM

55

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:50:47 PM

34

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:51:21 PM

44

1206.50

CEUX

GENMAB A/S

07-Apr-2025

13:51:52 PM

88

1206.50

XCSE

GENMAB A/S

07-Apr-2025

13:51:52 PM

24

1206.50

TQEX

GENMAB A/S

07-Apr-2025

13:52:32 PM

84

1205.50

XCSE

GENMAB A/S

07-Apr-2025

13:52:32 PM

53

1205.50

CEUX

GENMAB A/S

07-Apr-2025

13:52:32 PM

25

1205.00

AQEU

GENMAB A/S

07-Apr-2025

13:52:39 PM

45

1204.50

CEUX

GENMAB A/S

07-Apr-2025

13:52:39 PM

1

1204.50

CEUX

GENMAB A/S

07-Apr-2025

13:52:53 PM

10

1204.50

CEUX

GENMAB A/S

07-Apr-2025

13:53:25 PM

85

1204.00

XCSE

GENMAB A/S

07-Apr-2025

13:54:30 PM

89

1205.00

XCSE

GENMAB A/S

07-Apr-2025

13:54:30 PM

47

1205.00

TQEX

GENMAB A/S

07-Apr-2025

13:56:44 PM

83

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:56:44 PM

63

1207.00

XCSE

GENMAB A/S

07-Apr-2025

13:57:35 PM

86

1207.50

CEUX

GENMAB A/S

07-Apr-2025

14:01:29 PM

12

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:29 PM

11

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:29 PM

7

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:29 PM

37

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:46 PM

60

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:46 PM

11

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:46 PM

87

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:01:46 PM

86

1210.50

CEUX

GENMAB A/S

07-Apr-2025

14:01:46 PM

26

1210.50

AQEU

GENMAB A/S

07-Apr-2025

14:01:53 PM

83

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

2

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

11

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

12

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

30

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

10

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

17

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

11

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:53 PM

35

1210.00

AQEU

GENMAB A/S

07-Apr-2025

14:01:54 PM

12

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:01:54 PM

12

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:02:07 PM

11

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:02:07 PM

11

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:02:07 PM

16

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:02:07 PM

40

1210.50

XCSE

GENMAB A/S

07-Apr-2025

14:02:07 PM

19

1210.50

XCSE

22


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:02:22 PM

89

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:02:22 PM

87

1209.50

CEUX

GENMAB A/S

07-Apr-2025

14:03:45 PM

84

1211.00

XCSE

GENMAB A/S

07-Apr-2025

14:03:45 PM

33

1211.00

TQEX

GENMAB A/S

07-Apr-2025

14:04:21 PM

83

1210.50

CEUX

GENMAB A/S

07-Apr-2025

14:05:11 PM

1

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:05:11 PM

79

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:05:11 PM

10

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:05:11 PM

83

1209.50

CEUX

GENMAB A/S

07-Apr-2025

14:05:11 PM

26

1209.50

AQEU

GENMAB A/S

07-Apr-2025

14:07:32 PM

30

1210.50

TQEX

GENMAB A/S

07-Apr-2025

14:07:32 PM

85

1210.50

CEUX

GENMAB A/S

07-Apr-2025

14:07:46 PM

29

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:07:46 PM

57

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:05 PM

47

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:08:05 PM

22

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:08:05 PM

10

1209.50

XCSE

GENMAB A/S

07-Apr-2025

14:08:05 PM

26

1209.50

TQEX

GENMAB A/S

07-Apr-2025

14:08:05 PM

82

1209.50

CEUX

GENMAB A/S

07-Apr-2025

14:08:05 PM

7

1209.50

CEUX

GENMAB A/S

07-Apr-2025

14:08:05 PM

28

1209.50

AQEU

GENMAB A/S

07-Apr-2025

14:08:08 PM

16

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:19 PM

67

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:21 PM

36

1208.50

CEUX

GENMAB A/S

07-Apr-2025

14:08:21 PM

49

1208.50

CEUX

GENMAB A/S

07-Apr-2025

14:08:30 PM

12

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:30 PM

23

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:38 PM

25

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:08:38 PM

28

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:09:37 PM

1

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:09:44 PM

30

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:09:44 PM

2

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:10:14 PM

24

1209.00

AQEU

GENMAB A/S

07-Apr-2025

14:10:38 PM

27

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:10:38 PM

7

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:11:18 PM

24

1208.50

TQEX

GENMAB A/S

07-Apr-2025

14:11:18 PM

72

1208.50

CEUX

GENMAB A/S

07-Apr-2025

14:11:56 PM

20

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:11:56 PM

67

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:11:56 PM

2

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:11:56 PM

53

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:13:15 PM

17

1207.50

XCSE

GENMAB A/S

07-Apr-2025

14:13:15 PM

9

1207.50

XCSE

23


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:13:56 PM

2

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:13:56 PM

4

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:13:56 PM

20

1207.50

AQEU

GENMAB A/S

07-Apr-2025

14:13:57 PM

17

1208.00

XCSE

GENMAB A/S

07-Apr-2025

14:16:00 PM

25

1210.50

TQEX

GENMAB A/S

07-Apr-2025

14:16:46 PM

89

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:16:47 PM

12

1210.00

CEUX

GENMAB A/S

07-Apr-2025

14:16:47 PM

73

1210.00

CEUX

GENMAB A/S

07-Apr-2025

14:17:08 PM

24

1209.50

TQEX

GENMAB A/S

07-Apr-2025

14:17:43 PM

34

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:02 PM

50

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:02 PM

89

1209.00

CEUX

GENMAB A/S

07-Apr-2025

14:18:42 PM

26

1209.50

AQEU

GENMAB A/S

07-Apr-2025

14:18:43 PM

10

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

30

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

10

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

23

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

12

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

10

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

11

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

12

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

12

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:43 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:44 PM

10

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:44 PM

12

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:44 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:18:44 PM

40

1210.00

XCSE

GENMAB A/S

07-Apr-2025

14:19:04 PM

27

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:19:04 PM

62

1209.00

XCSE

GENMAB A/S

07-Apr-2025

14:19:04 PM

25

1209.00

TQEX

GENMAB A/S

07-Apr-2025

14:19:04 PM

83

1209.00

CEUX

GENMAB A/S

07-Apr-2025

14:19:31 PM

6

1211.00

XCSE

GENMAB A/S

07-Apr-2025

14:20:29 PM

63

1211.50

CEUX

GENMAB A/S

07-Apr-2025

14:20:29 PM

25

1211.50

CEUX

GENMAB A/S

07-Apr-2025

14:20:32 PM

85

1211.00

XCSE

GENMAB A/S

07-Apr-2025

14:20:32 PM

24

1211.50

TQEX

GENMAB A/S

07-Apr-2025

14:20:32 PM

86

1211.50

CEUX

GENMAB A/S

07-Apr-2025

14:20:32 PM

24

1211.00

AQEU

GENMAB A/S

07-Apr-2025

14:20:33 PM

3

1210.50

CEUX

24


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:21:22 PM

10

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:22 PM

40

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:22 PM

11

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:22 PM

11

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:23 PM

40

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:57 PM

17

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:21:57 PM

11

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:22:25 PM

88

1213.00

XCSE

GENMAB A/S

07-Apr-2025

14:22:25 PM

90

1212.50

CEUX

GENMAB A/S

07-Apr-2025

14:22:25 PM

46

1212.50

AQEU

GENMAB A/S

07-Apr-2025

14:23:22 PM

40

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:23:22 PM

11

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:23:22 PM

10

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:23:22 PM

45

1214.50

TQEX

GENMAB A/S

07-Apr-2025

14:23:24 PM

90

1213.50

XCSE

GENMAB A/S

07-Apr-2025

14:23:24 PM

3

1214.50

CEUX

GENMAB A/S

07-Apr-2025

14:23:24 PM

86

1214.50

CEUX

GENMAB A/S

07-Apr-2025

14:23:24 PM

72

1213.50

CEUX

GENMAB A/S

07-Apr-2025

14:24:00 PM

3

1213.50

CEUX

GENMAB A/S

07-Apr-2025

14:24:00 PM

22

1213.50

CEUX

GENMAB A/S

07-Apr-2025

14:24:37 PM

88

1212.50

XCSE

GENMAB A/S

07-Apr-2025

14:24:37 PM

57

1212.50

CEUX

GENMAB A/S

07-Apr-2025

14:24:38 PM

90

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:24:40 PM

37

1211.00

CEUX

GENMAB A/S

07-Apr-2025

14:25:39 PM

27

1211.00

CEUX

GENMAB A/S

07-Apr-2025

14:27:29 PM

84

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:27:35 PM

30

1211.00

CEUX

GENMAB A/S

07-Apr-2025

14:27:37 PM

40

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:27:37 PM

28

1211.50

XCSE

GENMAB A/S

07-Apr-2025

14:28:31 PM

25

1212.50

TQEX

GENMAB A/S

07-Apr-2025

14:29:01 PM

12

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:29:01 PM

11

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:29:01 PM

10

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:29:01 PM

12

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:31:23 PM

44

1219.00

TQEX

GENMAB A/S

07-Apr-2025

14:31:34 PM

81

1218.50

CEUX

GENMAB A/S

07-Apr-2025

14:31:34 PM

24

1219.00

AQEU

GENMAB A/S

07-Apr-2025

14:31:44 PM

85

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:31:44 PM

40

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:31:44 PM

32

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:31:44 PM

40

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:31:44 PM

46

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:31:44 PM

1

1218.00

XCSE

25


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:31:44 PM

85

1217.50

CEUX

GENMAB A/S

07-Apr-2025

14:32:06 PM

86

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

40

1217.50

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

10

1217.50

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

40

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

11

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

1

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:32:06 PM

24

1217.50

CEUX

GENMAB A/S

07-Apr-2025

14:32:22 PM

18

1216.50

CEUX

GENMAB A/S

07-Apr-2025

14:32:22 PM

51

1216.50

CEUX

GENMAB A/S

07-Apr-2025

14:32:31 PM

84

1216.00

XCSE

GENMAB A/S

07-Apr-2025

14:33:41 PM

85

1215.50

XCSE

GENMAB A/S

07-Apr-2025

14:35:04 PM

18

1215.00

CEUX

GENMAB A/S

07-Apr-2025

14:35:05 PM

88

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:35:05 PM

39

1215.00

CEUX

GENMAB A/S

07-Apr-2025

14:35:30 PM

1

1216.00

AQEU

GENMAB A/S

07-Apr-2025

14:36:17 PM

28

1216.00

AQEU

GENMAB A/S

07-Apr-2025

14:36:23 PM

64

1215.50

XCSE

GENMAB A/S

07-Apr-2025

14:36:23 PM

1

1215.50

XCSE

GENMAB A/S

07-Apr-2025

14:36:23 PM

19

1215.50

XCSE

GENMAB A/S

07-Apr-2025

14:36:59 PM

25

1215.50

TQEX

GENMAB A/S

07-Apr-2025

14:37:56 PM

84

1215.50

XCSE

GENMAB A/S

07-Apr-2025

14:37:59 PM

50

1215.00

CEUX

GENMAB A/S

07-Apr-2025

14:38:17 PM

4

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:38:41 PM

86

1214.50

XCSE

GENMAB A/S

07-Apr-2025

14:38:41 PM

31

1214.50

AQEU

GENMAB A/S

07-Apr-2025

14:38:57 PM

26

1214.00

CEUX

GENMAB A/S

07-Apr-2025

14:39:34 PM

87

1213.50

XCSE

GENMAB A/S

07-Apr-2025

14:39:50 PM

3

1213.00

CEUX

GENMAB A/S

07-Apr-2025

14:39:50 PM

21

1213.00

CEUX

GENMAB A/S

07-Apr-2025

14:40:28 PM

40

1214.00

XCSE

GENMAB A/S

07-Apr-2025

14:40:28 PM

19

1214.00

XCSE

GENMAB A/S

07-Apr-2025

14:40:28 PM

10

1214.00

XCSE

GENMAB A/S

07-Apr-2025

14:40:28 PM

11

1214.00

XCSE

GENMAB A/S

07-Apr-2025

14:40:28 PM

24

1213.50

TQEX

GENMAB A/S

07-Apr-2025

14:40:28 PM

84

1213.50

CEUX

GENMAB A/S

07-Apr-2025

14:40:28 PM

43

1213.50

CEUX

GENMAB A/S

07-Apr-2025

14:41:47 PM

11

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:41:47 PM

14

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:41:49 PM

42

1215.00

XCSE

GENMAB A/S

07-Apr-2025

14:42:00 PM

37

1216.00

XCSE

GENMAB A/S

07-Apr-2025

14:42:00 PM

2

1216.00

TQEX

GENMAB A/S

07-Apr-2025

14:42:00 PM

75

1216.00

CEUX

26


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:42:00 PM

1

1216.00

AQEU

GENMAB A/S

07-Apr-2025

14:42:01 PM

24

1216.00

AQEU

GENMAB A/S

07-Apr-2025

14:42:21 PM

27

1216.00

XCSE

GENMAB A/S

07-Apr-2025

14:42:21 PM

44

1216.00

CEUX

GENMAB A/S

07-Apr-2025

14:43:23 PM

88

1216.50

XCSE

GENMAB A/S

07-Apr-2025

14:43:23 PM

42

1216.50

XCSE

GENMAB A/S

07-Apr-2025

14:44:25 PM

3

1216.00

AQEU

GENMAB A/S

07-Apr-2025

14:44:29 PM

10

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:44:29 PM

11

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:44:29 PM

11

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:44:31 PM

23

1218.50

XCSE

GENMAB A/S

07-Apr-2025

14:44:31 PM

11

1218.50

XCSE

GENMAB A/S

07-Apr-2025

14:44:31 PM

12

1218.50

XCSE

GENMAB A/S

07-Apr-2025

14:44:35 PM

41

1217.50

XCSE

GENMAB A/S

07-Apr-2025

14:44:35 PM

66

1217.50

CEUX

GENMAB A/S

07-Apr-2025

14:44:43 PM

25

1217.00

AQEU

GENMAB A/S

07-Apr-2025

14:44:46 PM

32

1216.50

TQEX

GENMAB A/S

07-Apr-2025

14:44:46 PM

20

1216.00

CEUX

GENMAB A/S

07-Apr-2025

14:45:35 PM

40

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:35 PM

12

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:35 PM

11

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:37 PM

31

1216.00

CEUX

GENMAB A/S

07-Apr-2025

14:45:48 PM

28

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:48 PM

11

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:48 PM

40

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:45:48 PM

16

1217.00

XCSE

GENMAB A/S

07-Apr-2025

14:46:12 PM

90

1216.00

XCSE

GENMAB A/S

07-Apr-2025

14:46:12 PM

49

1216.50

CEUX

GENMAB A/S

07-Apr-2025

14:47:57 PM

35

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:47:57 PM

11

1218.00

XCSE

GENMAB A/S

07-Apr-2025

14:48:29 PM

50

1219.00

XCSE

GENMAB A/S

07-Apr-2025

14:48:29 PM

27

1219.00

XCSE

GENMAB A/S

07-Apr-2025

14:48:36 PM

1

1219.00

AQEU

GENMAB A/S

07-Apr-2025

14:48:36 PM

1

1219.00

AQEU

GENMAB A/S

07-Apr-2025

14:48:50 PM

28

1218.50

TQEX

GENMAB A/S

07-Apr-2025

14:48:50 PM

23

1219.00

AQEU

GENMAB A/S

07-Apr-2025

14:49:13 PM

84

1223.50

XCSE

GENMAB A/S

07-Apr-2025

14:49:13 PM

84

1223.50

CEUX

GENMAB A/S

07-Apr-2025

14:49:19 PM

7

1224.50

XCSE

GENMAB A/S

07-Apr-2025

14:49:19 PM

83

1224.50

XCSE

GENMAB A/S

07-Apr-2025

14:50:33 PM

25

1226.50

TQEX

GENMAB A/S

07-Apr-2025

14:50:33 PM

74

1226.50

CEUX

GENMAB A/S

07-Apr-2025

14:50:37 PM

86

1226.00

XCSE

27


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

14:50:37 PM

85

1225.00

XCSE

GENMAB A/S

07-Apr-2025

14:50:37 PM

76

1225.50

CEUX

GENMAB A/S

07-Apr-2025

14:50:37 PM

46

1225.50

AQEU

GENMAB A/S

07-Apr-2025

14:51:35 PM

86

1227.50

XCSE

GENMAB A/S

07-Apr-2025

14:51:50 PM

90

1226.50

XCSE

GENMAB A/S

07-Apr-2025

14:51:50 PM

24

1226.50

CEUX

GENMAB A/S

07-Apr-2025

14:52:02 PM

42

1225.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:02 PM

43

1225.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:02 PM

16

1226.00

TQEX

GENMAB A/S

07-Apr-2025

14:52:02 PM

9

1226.00

TQEX

GENMAB A/S

07-Apr-2025

14:52:02 PM

39

1225.50

CEUX

GENMAB A/S

07-Apr-2025

14:52:24 PM

30

1227.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:24 PM

23

1227.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:24 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:24 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

14:52:57 PM

48

1227.50

CEUX

GENMAB A/S

07-Apr-2025

14:53:46 PM

71

1228.00

XCSE

GENMAB A/S

07-Apr-2025

14:55:18 PM

85

1229.00

XCSE

GENMAB A/S

07-Apr-2025

14:55:18 PM

25

1229.00

TQEX

GENMAB A/S

07-Apr-2025

14:55:18 PM

16

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:55:18 PM

33

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:55:18 PM

25

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:55:38 PM

47

1229.00

AQEU

GENMAB A/S

07-Apr-2025

14:56:21 PM

53

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:56:21 PM

13

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:56:24 PM

90

1229.00

XCSE

GENMAB A/S

07-Apr-2025

14:56:30 PM

59

1228.50

CEUX

GENMAB A/S

07-Apr-2025

14:56:49 PM

10

1228.00

XCSE

GENMAB A/S

07-Apr-2025

14:56:49 PM

77

1228.00

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

40

1229.50

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

16

1229.50

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

11

1229.50

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

10

1229.50

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

8

1229.50

XCSE

GENMAB A/S

07-Apr-2025

14:57:22 PM

24

1230.00

TQEX

GENMAB A/S

07-Apr-2025

14:57:22 PM

32

1229.50

CEUX

GENMAB A/S

07-Apr-2025

14:58:44 PM

89

1229.00

XCSE

GENMAB A/S

07-Apr-2025

14:59:30 PM

1

1229.00

XCSE

GENMAB A/S

07-Apr-2025

14:59:30 PM

88

1229.00

XCSE

GENMAB A/S

07-Apr-2025

14:59:30 PM

24

1229.00

TQEX

GENMAB A/S

07-Apr-2025

14:59:38 PM

25

1228.50

CEUX

GENMAB A/S

07-Apr-2025

14:59:38 PM

12

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:00:01 PM

17

1229.00

XCSE

28


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:00:02 PM

10

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:00:02 PM

1

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:00:50 PM

57

1229.50

CEUX

GENMAB A/S

07-Apr-2025

15:01:03 PM

62

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:01:03 PM

86

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:01:03 PM

55

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:02:32 PM

85

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:02:32 PM

24

1229.00

TQEX

GENMAB A/S

07-Apr-2025

15:02:32 PM

30

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:03:11 PM

90

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:04:56 PM

12

1228.00

TQEX

GENMAB A/S

07-Apr-2025

15:04:56 PM

33

1228.00

AQEU

GENMAB A/S

07-Apr-2025

15:06:08 PM

89

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:06:08 PM

40

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:06:08 PM

17

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:06:08 PM

24

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:06:08 PM

32

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:06:08 PM

1

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:06:08 PM

83

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:06:09 PM

2

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:07:09 PM

85

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:07:09 PM

38

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:07:43 PM

54

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:08:49 PM

22

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:09:23 PM

89

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:09:23 PM

54

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:09:23 PM

30

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:09:23 PM

85

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:10:23 PM

30

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:10:23 PM

16

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:12:49 PM

85

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:12:49 PM

34

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:12:49 PM

26

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:12:49 PM

24

1229.00

TQEX

GENMAB A/S

07-Apr-2025

15:12:49 PM

20

1229.50

CEUX

GENMAB A/S

07-Apr-2025

15:12:49 PM

66

1229.50

CEUX

GENMAB A/S

07-Apr-2025

15:12:49 PM

33

1229.50

AQEU

GENMAB A/S

07-Apr-2025

15:12:50 PM

34

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:13:21 PM

83

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:13:21 PM

24

1229.00

TQEX

GENMAB A/S

07-Apr-2025

15:14:23 PM

45

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

26

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

40

1229.00

XCSE

29


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:14:23 PM

2

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

27

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

23

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

11

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

40

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

12

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:23 PM

32

1229.00

CEUX

GENMAB A/S

07-Apr-2025

15:14:23 PM

89

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:14:23 PM

33

1228.50

AQEU

GENMAB A/S

07-Apr-2025

15:14:47 PM

26

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:14:47 PM

12

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:15:48 PM

83

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:15:48 PM

58

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:15:48 PM

27

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:15:48 PM

31

1228.50

AQEU

GENMAB A/S

07-Apr-2025

15:16:16 PM

23

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:16 PM

7

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:16 PM

59

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:16 PM

24

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:16 PM

24

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:16 PM

9

1228.00

TQEX

GENMAB A/S

07-Apr-2025

15:16:16 PM

15

1228.00

TQEX

GENMAB A/S

07-Apr-2025

15:16:17 PM

28

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:16:27 PM

5

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:50 PM

29

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:50 PM

40

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:50 PM

18

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:16:50 PM

58

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:17:32 PM

4

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:17:32 PM

11

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:17:32 PM

40

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:17:33 PM

11

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:17:38 PM

90

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:17:38 PM

17

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:17:38 PM

7

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:17:38 PM

64

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:17:38 PM

28

1228.00

AQEU

GENMAB A/S

07-Apr-2025

15:18:55 PM

85

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:18:55 PM

25

1229.00

TQEX

GENMAB A/S

07-Apr-2025

15:18:55 PM

90

1229.00

CEUX

GENMAB A/S

07-Apr-2025

15:19:07 PM

87

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:19:10 PM

24

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:19:28 PM

16

1228.50

XCSE

30


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:19:28 PM

1

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:19:36 PM

71

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:20:01 PM

26

1228.00

TQEX

GENMAB A/S

07-Apr-2025

15:20:01 PM

59

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:20:01 PM

24

1228.00

AQEU

GENMAB A/S

07-Apr-2025

15:20:07 PM

40

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:20:07 PM

26

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:20:07 PM

39

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:20:22 PM

84

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:20:22 PM

90

1227.00

CEUX

GENMAB A/S

07-Apr-2025

15:21:39 PM

24

1228.50

AQEU

GENMAB A/S

07-Apr-2025

15:23:16 PM

28

1230.00

CEUX

GENMAB A/S

07-Apr-2025

15:23:27 PM

16

1230.50

TQEX

GENMAB A/S

07-Apr-2025

15:23:27 PM

6

1230.50

TQEX

GENMAB A/S

07-Apr-2025

15:23:27 PM

3

1230.50

TQEX

GENMAB A/S

07-Apr-2025

15:23:27 PM

88

1230.50

CEUX

GENMAB A/S

07-Apr-2025

15:23:42 PM

87

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

43

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

40

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

30

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

12

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

11

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:42 PM

6

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:45 PM

10

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:45 PM

10

1230.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:49 PM

26

1230.00

TQEX

GENMAB A/S

07-Apr-2025

15:23:50 PM

11

1230.00

XCSE

GENMAB A/S

07-Apr-2025

15:23:50 PM

16

1230.00

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

89

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

40

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

30

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

6

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

11

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

12

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:23:56 PM

87

1229.50

CEUX

GENMAB A/S

07-Apr-2025

15:23:56 PM

24

1229.50

AQEU

GENMAB A/S

07-Apr-2025

15:24:07 PM

40

1229.50

XCSE

GENMAB A/S

07-Apr-2025

15:24:12 PM

87

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:24:12 PM

7

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:24:12 PM

78

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:24:12 PM

24

1228.50

AQEU

GENMAB A/S

07-Apr-2025

15:24:57 PM

40

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:24:57 PM

10

1228.50

XCSE

31


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:24:57 PM

11

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:24:57 PM

21

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:24:57 PM

20

1228.50

XCSE

GENMAB A/S

07-Apr-2025

15:25:00 PM

89

1227.00

CEUX

GENMAB A/S

07-Apr-2025

15:25:06 PM

30

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:25:06 PM

28

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:25:06 PM

56

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:25:34 PM

89

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:25:34 PM

63

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:25:34 PM

23

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:25:47 PM

22

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:25:47 PM

3

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:26:07 PM

89

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:26:07 PM

40

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:26:07 PM

24

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:26:07 PM

35

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:26:07 PM

24

1226.00

AQEU

GENMAB A/S

07-Apr-2025

15:26:49 PM

32

1226.50

TQEX

GENMAB A/S

07-Apr-2025

15:27:18 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:18 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:18 PM

27

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:18 PM

1

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:18 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:19 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:19 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:19 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:19 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:19 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

85

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

60

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

2

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

27

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

11

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:30 PM

26

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:27:30 PM

84

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:27:30 PM

46

1227.50

AQEU

GENMAB A/S

07-Apr-2025

15:27:30 PM

1

1227.50

AQEU

GENMAB A/S

07-Apr-2025

15:27:40 PM

25

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:40 PM

64

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:27:40 PM

55

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:27:40 PM

30

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:28:10 PM

89

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:28:10 PM

87

1225.50

XCSE

32


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:28:10 PM

85

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:29:06 PM

20

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:29:06 PM

42

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:29:07 PM

26

1225.00

TQEX

GENMAB A/S

07-Apr-2025

15:29:07 PM

7

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:29:26 PM

1

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:29:26 PM

84

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:29:32 PM

46

1223.50

XCSE

GENMAB A/S

07-Apr-2025

15:29:32 PM

41

1223.50

XCSE

GENMAB A/S

07-Apr-2025

15:29:32 PM

47

1224.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:00 PM

30

1223.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:00 PM

26

1223.00

AQEU

GENMAB A/S

07-Apr-2025

15:30:00 PM

18

1223.00

AQEU

GENMAB A/S

07-Apr-2025

15:30:04 PM

34

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:04 PM

24

1222.50

TQEX

GENMAB A/S

07-Apr-2025

15:30:14 PM

8

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:14 PM

17

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:14 PM

51

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:14 PM

8

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:14 PM

58

1222.50

CEUX

GENMAB A/S

07-Apr-2025

15:30:22 PM

11

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:27 PM

74

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:27 PM

50

1221.50

CEUX

GENMAB A/S

07-Apr-2025

15:30:31 PM

15

1220.50

TQEX

GENMAB A/S

07-Apr-2025

15:30:44 PM

10

1221.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:44 PM

26

1221.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:44 PM

16

1221.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:44 PM

15

1221.00

CEUX

GENMAB A/S

07-Apr-2025

15:30:46 PM

89

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:46 PM

94

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:30:46 PM

9

1221.00

CEUX

GENMAB A/S

07-Apr-2025

15:31:44 PM

25

1224.50

TQEX

GENMAB A/S

07-Apr-2025

15:31:44 PM

43

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:31:45 PM

40

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:31:56 PM

100

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

90

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

34

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

12

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

30

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

37

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

12

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

11

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

10

1225.50

XCSE

33


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:32:06 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

34

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

27

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

10

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

17

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

10

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

9

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:06 PM

31

1225.00

TQEX

GENMAB A/S

07-Apr-2025

15:32:07 PM

12

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:07 PM

11

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:07 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:11 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:11 PM

27

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:14 PM

88

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:32:14 PM

27

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:32:14 PM

27

1225.00

TQEX

GENMAB A/S

07-Apr-2025

15:32:14 PM

20

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:32:20 PM

2

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:32:20 PM

11

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:32:37 PM

8

1226.00

TQEX

GENMAB A/S

07-Apr-2025

15:32:37 PM

6

1226.00

TQEX

GENMAB A/S

07-Apr-2025

15:32:45 PM

85

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:32:45 PM

89

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:32:45 PM

15

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:32:45 PM

8

1225.50

AQEU

GENMAB A/S

07-Apr-2025

15:33:03 PM

22

1225.50

AQEU

GENMAB A/S

07-Apr-2025

15:33:08 PM

5

1225.50

AQEU

GENMAB A/S

07-Apr-2025

15:33:14 PM

25

1225.50

TQEX

GENMAB A/S

07-Apr-2025

15:33:22 PM

36

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:33:34 PM

36

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:33:34 PM

25

1224.50

AQEU

GENMAB A/S

07-Apr-2025

15:33:42 PM

43

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:33:42 PM

42

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:33:42 PM

36

1225.00

CEUX

GENMAB A/S

07-Apr-2025

15:33:42 PM

2

1224.50

AQEU

GENMAB A/S

07-Apr-2025

15:33:56 PM

100

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:34:02 PM

60

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:08 PM

40

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:08 PM

26

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:08 PM

10

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:08 PM

24

1224.50

TQEX

GENMAB A/S

07-Apr-2025

15:34:08 PM

87

1224.50

CEUX

34


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:34:08 PM

40

1224.50

AQEU

GENMAB A/S

07-Apr-2025

15:34:30 PM

40

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:30 PM

11

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:30 PM

26

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:30 PM

24

1224.50

TQEX

GENMAB A/S

07-Apr-2025

15:34:30 PM

68

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:30 PM

18

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:30 PM

28

1224.50

AQEU

GENMAB A/S

07-Apr-2025

15:34:30 PM

2

1224.50

AQEU

GENMAB A/S

07-Apr-2025

15:34:35 PM

20

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:35 PM

22

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:41 PM

36

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:41 PM

15

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:45 PM

34

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:48 PM

20

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:49 PM

24

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:49 PM

16

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:49 PM

10

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:49 PM

12

1229.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:49 PM

86

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:50 PM

16

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:50 PM

36

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:52 PM

33

1229.00

CEUX

GENMAB A/S

07-Apr-2025

15:34:53 PM

85

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:53 PM

79

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:34:53 PM

15

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:34:53 PM

17

1227.50

TQEX

GENMAB A/S

07-Apr-2025

15:34:53 PM

32

1228.00

CEUX

GENMAB A/S

07-Apr-2025

15:34:53 PM

90

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:34:53 PM

33

1227.50

AQEU

GENMAB A/S

07-Apr-2025

15:35:03 PM

8

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:03 PM

60

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:03 PM

22

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

87

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

40

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

23

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

27

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

10

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

13

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

10

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

23

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

11

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

47

1227.00

XCSE

35


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:35:11 PM

22

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

1

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:11 PM

29

1226.50

TQEX

GENMAB A/S

07-Apr-2025

15:35:11 PM

84

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:11 PM

27

1226.50

AQEU

GENMAB A/S

07-Apr-2025

15:35:12 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

75

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:12 PM

14

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

11

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

23

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

10

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

40

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

29

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:16 PM

27

1225.50

TQEX

GENMAB A/S

07-Apr-2025

15:35:16 PM

86

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:17 PM

13

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:17 PM

11

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:17 PM

10

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:17 PM

26

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:19 PM

87

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:19 PM

29

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:19 PM

55

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:20 PM

70

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:20 PM

11

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:20 PM

11

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:20 PM

21

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:26 PM

86

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:26 PM

90

1224.00

CEUX

GENMAB A/S

07-Apr-2025

15:35:31 PM

27

1223.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:46 PM

85

1223.00

XCSE

GENMAB A/S

07-Apr-2025

15:35:46 PM

33

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:46 PM

50

1222.50

XCSE

GENMAB A/S

07-Apr-2025

15:35:46 PM

78

1222.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:46 PM

10

1222.50

CEUX

GENMAB A/S

07-Apr-2025

15:35:46 PM

27

1223.00

AQEU

36


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:36:25 PM

38

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:25 PM

50

1221.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:25 PM

27

1221.50

CEUX

GENMAB A/S

07-Apr-2025

15:36:27 PM

89

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:27 PM

78

1219.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:27 PM

5

1219.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:27 PM

85

1218.00

XCSE

GENMAB A/S

07-Apr-2025

15:36:27 PM

26

1221.00

TQEX

GENMAB A/S

07-Apr-2025

15:36:27 PM

25

1220.50

CEUX

GENMAB A/S

07-Apr-2025

15:36:27 PM

30

1219.00

CEUX

GENMAB A/S

07-Apr-2025

15:36:27 PM

9

1220.00

AQEU

GENMAB A/S

07-Apr-2025

15:36:27 PM

16

1220.00

AQEU

GENMAB A/S

07-Apr-2025

15:36:28 PM

41

1219.00

XCSE

GENMAB A/S

07-Apr-2025

15:36:32 PM

25

1218.00

XCSE

GENMAB A/S

07-Apr-2025

15:36:44 PM

27

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:36:44 PM

24

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:36:44 PM

30

1217.50

CEUX

GENMAB A/S

07-Apr-2025

15:36:44 PM

24

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:36:44 PM

13

1215.50

CEUX

GENMAB A/S

07-Apr-2025

15:36:45 PM

24

1215.50

XCSE

GENMAB A/S

07-Apr-2025

15:36:45 PM

25

1215.50

TQEX

GENMAB A/S

07-Apr-2025

15:36:58 PM

31

1214.50

XCSE

GENMAB A/S

07-Apr-2025

15:37:27 PM

25

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:37:27 PM

44

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:37:27 PM

39

1215.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:02 PM

90

1219.00

XCSE

GENMAB A/S

07-Apr-2025

15:38:02 PM

90

1218.00

XCSE

GENMAB A/S

07-Apr-2025

15:38:02 PM

24

1219.00

TQEX

GENMAB A/S

07-Apr-2025

15:38:02 PM

19

1218.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:02 PM

31

1218.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:02 PM

24

1219.00

AQEU

GENMAB A/S

07-Apr-2025

15:38:11 PM

32

1217.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:11 PM

15

1217.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:12 PM

27

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:38:15 PM

56

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:38:15 PM

23

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:15 PM

16

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:38:25 PM

32

1215.50

XCSE

GENMAB A/S

07-Apr-2025

15:38:25 PM

6

1215.50

XCSE

GENMAB A/S

07-Apr-2025

15:38:29 PM

42

1215.00

CEUX

GENMAB A/S

07-Apr-2025

15:38:30 PM

25

1214.00

XCSE

GENMAB A/S

07-Apr-2025

15:38:30 PM

27

1214.00

CEUX

GENMAB A/S

07-Apr-2025

15:38:30 PM

27

1214.00

AQEU

37


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:38:31 PM

14

1214.50

TQEX

GENMAB A/S

07-Apr-2025

15:39:57 PM

40

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:39:57 PM

22

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:39:57 PM

25

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:39:57 PM

26

1218.00

XCSE

GENMAB A/S

07-Apr-2025

15:40:17 PM

27

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:17 PM

30

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:17 PM

9

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

41

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

16

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

29

1216.00

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

86

1215.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

37

1214.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

52

1214.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:19 PM

29

1216.00

TQEX

GENMAB A/S

07-Apr-2025

15:40:19 PM

70

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:40:19 PM

52

1215.50

CEUX

GENMAB A/S

07-Apr-2025

15:40:19 PM

49

1214.50

CEUX

GENMAB A/S

07-Apr-2025

15:40:19 PM

1

1216.00

AQEU

GENMAB A/S

07-Apr-2025

15:40:19 PM

23

1216.00

AQEU

GENMAB A/S

07-Apr-2025

15:40:29 PM

1

1214.50

CEUX

GENMAB A/S

07-Apr-2025

15:40:29 PM

30

1214.50

CEUX

GENMAB A/S

07-Apr-2025

15:40:31 PM

1

1214.50

AQEU

GENMAB A/S

07-Apr-2025

15:40:31 PM

45

1214.50

AQEU

GENMAB A/S

07-Apr-2025

15:40:35 PM

6

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:35 PM

77

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:40:35 PM

31

1214.00

TQEX

GENMAB A/S

07-Apr-2025

15:40:42 PM

45

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:40:58 PM

2

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:40:58 PM

16

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:20 PM

24

1214.00

TQEX

GENMAB A/S

07-Apr-2025

15:41:20 PM

36

1214.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:20 PM

13

1214.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:23 PM

24

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:41:23 PM

36

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:41:23 PM

24

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:41:23 PM

46

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:34 PM

85

1214.00

XCSE

GENMAB A/S

07-Apr-2025

15:41:34 PM

35

1214.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:47 PM

24

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:41:51 PM

57

1212.50

XCSE

GENMAB A/S

07-Apr-2025

15:41:51 PM

27

1212.50

XCSE

GENMAB A/S

07-Apr-2025

15:41:51 PM

1

1213.00

CEUX

38


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:42:01 PM

15

1212.50

CEUX

GENMAB A/S

07-Apr-2025

15:42:01 PM

9

1212.50

CEUX

GENMAB A/S

07-Apr-2025

15:42:19 PM

34

1211.50

XCSE

GENMAB A/S

07-Apr-2025

15:42:19 PM

42

1211.50

XCSE

GENMAB A/S

07-Apr-2025

15:42:19 PM

46

1211.50

TQEX

GENMAB A/S

07-Apr-2025

15:42:19 PM

29

1211.50

CEUX

GENMAB A/S

07-Apr-2025

15:42:35 PM

24

1214.00

AQEU

GENMAB A/S

07-Apr-2025

15:42:47 PM

2

1215.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:47 PM

12

1215.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:47 PM

23

1215.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:47 PM

33

1215.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:47 PM

11

1215.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

84

1214.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

85

1213.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

27

1212.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

30

1212.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

29

1212.00

XCSE

GENMAB A/S

07-Apr-2025

15:42:52 PM

51

1214.00

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

22

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

27

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

11

1211.50

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

20

1211.50

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

16

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:42:52 PM

6

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:42:59 PM

66

1213.00

XCSE

GENMAB A/S

07-Apr-2025

15:43:21 PM

3

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:43:21 PM

31

1213.00

CEUX

GENMAB A/S

07-Apr-2025

15:44:09 PM

60

1213.00

XCSE

GENMAB A/S

07-Apr-2025

15:44:09 PM

40

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:44:09 PM

11

1213.50

XCSE

GENMAB A/S

07-Apr-2025

15:44:09 PM

50

1213.50

CEUX

GENMAB A/S

07-Apr-2025

15:44:11 PM

24

1213.00

XCSE

GENMAB A/S

07-Apr-2025

15:44:16 PM

25

1213.50

TQEX

GENMAB A/S

07-Apr-2025

15:44:16 PM

50

1213.50

CEUX

GENMAB A/S

07-Apr-2025

15:44:16 PM

24

1213.50

AQEU

GENMAB A/S

07-Apr-2025

15:45:05 PM

85

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:05 PM

40

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:05 PM

12

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:33 PM

45

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:33 PM

38

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:33 PM

40

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:33 PM

24

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:33 PM

12

1217.50

XCSE

39


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:45:33 PM

24

1216.50

TQEX

GENMAB A/S

07-Apr-2025

15:45:33 PM

19

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:45:34 PM

40

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:34 PM

16

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:34 PM

10

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:34 PM

10

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:34 PM

6

1217.50

XCSE

GENMAB A/S

07-Apr-2025

15:45:36 PM

30

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:45:36 PM

8

1216.50

CEUX

GENMAB A/S

07-Apr-2025

15:45:38 PM

20

1216.50

AQEU

GENMAB A/S

07-Apr-2025

15:45:48 PM

36

1217.00

XCSE

GENMAB A/S

07-Apr-2025

15:45:48 PM

82

1217.00

CEUX

GENMAB A/S

07-Apr-2025

15:46:33 PM

8

1220.00

TQEX

GENMAB A/S

07-Apr-2025

15:46:33 PM

4

1220.00

TQEX

GENMAB A/S

07-Apr-2025

15:46:33 PM

12

1220.00

TQEX

GENMAB A/S

07-Apr-2025

15:46:38 PM

44

1219.50

CEUX

GENMAB A/S

07-Apr-2025

15:46:38 PM

30

1219.50

CEUX

GENMAB A/S

07-Apr-2025

15:47:08 PM

24

1221.00

TQEX

GENMAB A/S

07-Apr-2025

15:47:09 PM

6

1220.50

CEUX

GENMAB A/S

07-Apr-2025

15:47:11 PM

34

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:47:11 PM

50

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:47:11 PM

40

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:47:11 PM

10

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:47:11 PM

59

1220.50

CEUX

GENMAB A/S

07-Apr-2025

15:47:11 PM

13

1220.50

CEUX

GENMAB A/S

07-Apr-2025

15:47:11 PM

25

1220.50

AQEU

GENMAB A/S

07-Apr-2025

15:47:12 PM

17

1220.00

TQEX

GENMAB A/S

07-Apr-2025

15:47:13 PM

23

1220.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:22 PM

23

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:48:28 PM

10

1224.00

TQEX

GENMAB A/S

07-Apr-2025

15:48:36 PM

19

1225.50

AQEU

GENMAB A/S

07-Apr-2025

15:48:38 PM

10

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

25

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

10

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

14

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

14

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

30

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

56

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:48:38 PM

33

1225.50

TQEX

GENMAB A/S

07-Apr-2025

15:48:38 PM

13

1225.50

AQEU

GENMAB A/S

07-Apr-2025

15:48:38 PM

26

1225.00

AQEU

GENMAB A/S

07-Apr-2025

15:48:50 PM

86

1225.50

XCSE

40


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:48:50 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:50 PM

12

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:50 PM

24

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:48:50 PM

83

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:49:01 PM

84

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:49:06 PM

90

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:49:46 PM

3

1225.00

AQEU

GENMAB A/S

07-Apr-2025

15:49:46 PM

30

1225.00

AQEU

GENMAB A/S

07-Apr-2025

15:49:55 PM

18

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

10

1224.50

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

33

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

10

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

40

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

2

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:49:55 PM

90

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:49:56 PM

40

1225.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:12 PM

89

1224.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:12 PM

32

1224.00

TQEX

GENMAB A/S

07-Apr-2025

15:50:12 PM

60

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:50:12 PM

24

1224.50

CEUX

GENMAB A/S

07-Apr-2025

15:50:17 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:50:17 PM

23

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:50:17 PM

21

1225.50

XCSE

GENMAB A/S

07-Apr-2025

15:50:39 PM

43

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:50:39 PM

45

1225.50

CEUX

GENMAB A/S

07-Apr-2025

15:50:45 PM

45

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:45 PM

10

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

45

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

30

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

3

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

12

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

23

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

92

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

11

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:50:48 PM

10

1226.00

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

30

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

40

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

34

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

9

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

12

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

2

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

40

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:02 PM

10

1227.50

XCSE

41


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:51:03 PM

12

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

40

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

10

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

10

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

12

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

29

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

11

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

11

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

34

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

10

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

10

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:03 PM

32

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:34 PM

86

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:34 PM

83

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:51:34 PM

6

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:51:46 PM

17

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:51:56 PM

26

1227.00

TQEX

GENMAB A/S

07-Apr-2025

15:51:58 PM

34

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:51:58 PM

34

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:51:58 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:51:58 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:03 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:03 PM

40

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:03 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:15 PM

13

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

83

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

40

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

1

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

30

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

10

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

10

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:19 PM

84

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:52:37 PM

40

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:37 PM

13

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:52:37 PM

53

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:52:37 PM

23

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:52:40 PM

87

1227.50

XCSE

GENMAB A/S

07-Apr-2025

15:52:40 PM

24

1227.00

TQEX

GENMAB A/S

07-Apr-2025

15:52:40 PM

12

1227.50

CEUX

GENMAB A/S

07-Apr-2025

15:52:46 PM

88

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:52:46 PM

87

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:52:46 PM

31

1227.00

AQEU

GENMAB A/S

07-Apr-2025

15:53:23 PM

24

1226.50

TQEX

42


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:53:24 PM

3

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:53:24 PM

29

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:53:24 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:53:51 PM

89

1226.50

XCSE

GENMAB A/S

07-Apr-2025

15:53:51 PM

25

1226.50

TQEX

GENMAB A/S

07-Apr-2025

15:53:51 PM

87

1226.50

CEUX

GENMAB A/S

07-Apr-2025

15:53:51 PM

28

1226.00

AQEU

GENMAB A/S

07-Apr-2025

15:54:01 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:01 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:01 PM

61

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:01 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:01 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:01 PM

24

1227.00

AQEU

GENMAB A/S

07-Apr-2025

15:54:09 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:12 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:12 PM

11

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:13 PM

12

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:13 PM

10

1227.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:30 PM

11

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:54:32 PM

65

1228.00

XCSE

GENMAB A/S

07-Apr-2025

15:55:02 PM

44

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:55:02 PM

42

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:55:02 PM

27

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:55:22 PM

56

1228.50

CEUX

GENMAB A/S

07-Apr-2025

15:56:08 PM

7

1230.50

TQEX

GENMAB A/S

07-Apr-2025

15:56:08 PM

36

1230.50

TQEX

GENMAB A/S

07-Apr-2025

15:56:41 PM

26

1231.50

TQEX

GENMAB A/S

07-Apr-2025

15:57:01 PM

86

1231.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

76

1231.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

17

1231.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

76

1231.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

12

1231.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

1

1231.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

24

1231.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:01 PM

90

1231.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:01 PM

36

1231.50

CEUX

GENMAB A/S

07-Apr-2025

15:57:01 PM

6

1231.50

CEUX

GENMAB A/S

07-Apr-2025

15:57:01 PM

7

1231.50

CEUX

GENMAB A/S

07-Apr-2025

15:57:01 PM

36

1231.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:01 PM

7

1231.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:21 PM

83

1232.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

12

1232.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

11

1232.00

XCSE

43


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:57:34 PM

40

1232.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

2

1232.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

10

1232.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

10

1232.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:34 PM

41

1232.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:34 PM

48

1232.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:34 PM

36

1232.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:34 PM

6

1232.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:34 PM

6

1232.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:34 PM

45

1232.00

AQEU

GENMAB A/S

07-Apr-2025

15:57:41 PM

10

1233.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:41 PM

11

1233.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:41 PM

40

1233.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:41 PM

40

1233.50

XCSE

GENMAB A/S

07-Apr-2025

15:57:41 PM

83

1233.00

XCSE

GENMAB A/S

07-Apr-2025

15:57:41 PM

66

1233.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:42 PM

21

1233.00

CEUX

GENMAB A/S

07-Apr-2025

15:57:54 PM

14

1233.00

AQEU

GENMAB A/S

07-Apr-2025

15:58:32 PM

40

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:32 PM

2

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:32 PM

10

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:32 PM

33

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:32 PM

12

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:32 PM

11

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:41 PM

36

1233.50

TQEX

GENMAB A/S

07-Apr-2025

15:58:41 PM

87

1233.50

CEUX

GENMAB A/S

07-Apr-2025

15:58:45 PM

11

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:45 PM

10

1234.00

XCSE

GENMAB A/S

07-Apr-2025

15:58:58 PM

5

1233.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:14 PM

56

1234.50

CEUX

GENMAB A/S

07-Apr-2025

15:59:14 PM

31

1234.50

CEUX

GENMAB A/S

07-Apr-2025

15:59:20 PM

37

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

21

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

40

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

11

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

4

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

75

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

3

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

10

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

12

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

10

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

10

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

40

1234.50

XCSE

44


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

15:59:20 PM

53

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:20 PM

33

1234.00

TQEX

GENMAB A/S

07-Apr-2025

15:59:21 PM

10

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

12

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

12

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

40

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

11

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

28

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

12

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

12

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

40

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

37

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:21 PM

11

1234.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:33 PM

6

1234.50

TQEX

GENMAB A/S

07-Apr-2025

15:59:35 PM

18

1234.50

TQEX

GENMAB A/S

07-Apr-2025

15:59:37 PM

6

1235.00

CEUX

GENMAB A/S

07-Apr-2025

15:59:37 PM

75

1235.00

CEUX

GENMAB A/S

07-Apr-2025

15:59:39 PM

40

1238.00

XCSE

GENMAB A/S

07-Apr-2025

15:59:39 PM

26

1237.50

CEUX

GENMAB A/S

07-Apr-2025

15:59:39 PM

30

1237.50

CEUX

GENMAB A/S

07-Apr-2025

15:59:43 PM

92

1238.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:43 PM

12

1238.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:43 PM

9

1238.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:43 PM

40

1238.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:49 PM

40

1239.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

6

1240.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

12

1240.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

15

1240.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

75

1240.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

5

1240.50

XCSE

GENMAB A/S

07-Apr-2025

15:59:53 PM

85

1240.00

CEUX

GENMAB A/S

07-Apr-2025

15:59:57 PM

24

1241.00

XCSE

GENMAB A/S

07-Apr-2025

15:59:57 PM

25

1240.50

TQEX

GENMAB A/S

07-Apr-2025

15:59:57 PM

89

1240.50

CEUX

GENMAB A/S

07-Apr-2025

15:59:58 PM

41

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:00:03 PM

19

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:00:03 PM

25

1240.50

AQEU

GENMAB A/S

07-Apr-2025

16:00:15 PM

84

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:00:15 PM

84

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:00:15 PM

16

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:00:15 PM

13

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:15 PM

85

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:15 PM

22

1240.50

CEUX

45


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:00:15 PM

6

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:00:15 PM

10

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:00:15 PM

85

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:15 PM

26

1241.00

AQEU

GENMAB A/S

07-Apr-2025

16:00:15 PM

12

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:00:15 PM

18

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:00:45 PM

85

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:45 PM

89

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:45 PM

10

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:45 PM

76

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:45 PM

45

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:45 PM

51

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:45 PM

5

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:45 PM

20

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:47 PM

40

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:47 PM

8

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:00:47 PM

2

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:48 PM

22

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:00:55 PM

29

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:01:04 PM

45

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:01:04 PM

25

1238.00

TQEX

GENMAB A/S

07-Apr-2025

16:01:04 PM

24

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:01:15 PM

24

1237.00

CEUX

GENMAB A/S

07-Apr-2025

16:01:25 PM

10

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:01:25 PM

23

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:01:27 PM

20

1236.00

CEUX

GENMAB A/S

07-Apr-2025

16:01:27 PM

4

1236.00

CEUX

GENMAB A/S

07-Apr-2025

16:01:56 PM

60

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:01:56 PM

45

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:02:25 PM

83

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:02:25 PM

3

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:02:25 PM

41

1236.50

TQEX

GENMAB A/S

07-Apr-2025

16:02:25 PM

22

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:02:25 PM

10

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:02:25 PM

33

1236.50

AQEU

GENMAB A/S

07-Apr-2025

16:03:29 PM

35

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:29 PM

12

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:29 PM

40

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:41 PM

40

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:41 PM

22

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:41 PM

11

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:41 PM

40

1237.50

CEUX

GENMAB A/S

07-Apr-2025

16:03:41 PM

14

1237.50

CEUX

46


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:03:41 PM

34

1237.50

AQEU

GENMAB A/S

07-Apr-2025

16:03:42 PM

40

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:42 PM

15

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:43 PM

40

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:43 PM

12

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:47 PM

80

1237.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:47 PM

5

1237.00

XCSE

GENMAB A/S

07-Apr-2025

16:03:47 PM

6

1237.00

TQEX

GENMAB A/S

07-Apr-2025

16:03:48 PM

18

1237.00

TQEX

GENMAB A/S

07-Apr-2025

16:03:49 PM

18

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:03:49 PM

5

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:04:47 PM

90

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:04:47 PM

81

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:04:47 PM

9

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:04:49 PM

87

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:04:49 PM

30

1242.00

TQEX

GENMAB A/S

07-Apr-2025

16:04:49 PM

86

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:04:56 PM

36

1242.00

AQEU

GENMAB A/S

07-Apr-2025

16:04:58 PM

40

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:04:58 PM

73

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:05:07 PM

89

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:05:07 PM

12

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:05:07 PM

75

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:05:08 PM

26

1240.50

TQEX

GENMAB A/S

07-Apr-2025

16:05:19 PM

83

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:05:19 PM

84

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:05:37 PM

39

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:05:39 PM

5

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:05:48 PM

78

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:05:48 PM

27

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:06:07 PM

10

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:07 PM

40

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:07 PM

23

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:07 PM

10

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:17 PM

37

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:17 PM

10

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:17 PM

10

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:17 PM

11

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:06:17 PM

12

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:02 PM

35

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:02 PM

51

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:02 PM

44

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:07:19 PM

31

1241.00

TQEX

47


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:07:19 PM

82

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:07:25 PM

6

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:25 PM

79

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:25 PM

29

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:07:25 PM

38

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:07:26 PM

40

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:26 PM

11

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:26 PM

11

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:26 PM

11

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:07:29 PM

73

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:29 PM

10

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:29 PM

41

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:07:47 PM

40

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:47 PM

22

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:47 PM

10

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:48 PM

87

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:07:48 PM

32

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:07:48 PM

14

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:08:11 PM

38

1238.50

XCSE

GENMAB A/S

07-Apr-2025

16:08:11 PM

45

1238.50

XCSE

GENMAB A/S

07-Apr-2025

16:08:11 PM

14

1238.50

CEUX

GENMAB A/S

07-Apr-2025

16:08:11 PM

13

1238.50

CEUX

GENMAB A/S

07-Apr-2025

16:09:05 PM

40

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:09:05 PM

19

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:09:05 PM

30

1240.00

TQEX

GENMAB A/S

07-Apr-2025

16:09:05 PM

58

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:09:05 PM

37

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:09:13 PM

83

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:28 PM

29

1241.00

TQEX

GENMAB A/S

07-Apr-2025

16:09:28 PM

68

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:09:28 PM

2

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:09:31 PM

39

1241.00

AQEU

GENMAB A/S

07-Apr-2025

16:09:32 PM

83

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:09:32 PM

69

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:09:47 PM

4

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:47 PM

11

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:47 PM

40

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:47 PM

11

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:47 PM

30

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:48 PM

11

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:48 PM

40

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:48 PM

11

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:48 PM

11

1240.50

XCSE

48


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:09:57 PM

12

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:57 PM

40

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:57 PM

20

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:57 PM

12

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:57 PM

14

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:09:57 PM

4

1240.00

TQEX

GENMAB A/S

07-Apr-2025

16:09:58 PM

24

1240.00

TQEX

GENMAB A/S

07-Apr-2025

16:10:29 PM

76

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:10:34 PM

88

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:10:34 PM

55

1243.00

CEUX

GENMAB A/S

07-Apr-2025

16:10:42 PM

105

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:10:48 PM

47

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:10:59 PM

86

1244.50

XCSE

GENMAB A/S

07-Apr-2025

16:11:12 PM

86

1246.50

XCSE

GENMAB A/S

07-Apr-2025

16:11:12 PM

37

1246.50

CEUX

GENMAB A/S

07-Apr-2025

16:11:15 PM

28

1247.00

CEUX

GENMAB A/S

07-Apr-2025

16:11:19 PM

40

1249.00

XCSE

GENMAB A/S

07-Apr-2025

16:11:19 PM

21

1249.00

XCSE

GENMAB A/S

07-Apr-2025

16:11:19 PM

23

1249.00

XCSE

GENMAB A/S

07-Apr-2025

16:11:19 PM

34

1249.00

CEUX

GENMAB A/S

07-Apr-2025

16:11:21 PM

23

1249.00

CEUX

GENMAB A/S

07-Apr-2025

16:11:23 PM

71

1249.50

XCSE

GENMAB A/S

07-Apr-2025

16:11:23 PM

31

1250.00

CEUX

GENMAB A/S

07-Apr-2025

16:11:31 PM

22

1249.50

CEUX

GENMAB A/S

07-Apr-2025

16:11:43 PM

19

1250.50

TQEX

GENMAB A/S

07-Apr-2025

16:11:46 PM

83

1249.50

XCSE

GENMAB A/S

07-Apr-2025

16:11:46 PM

43

1249.50

CEUX

GENMAB A/S

07-Apr-2025

16:11:51 PM

69

1249.50

XCSE

GENMAB A/S

07-Apr-2025

16:11:54 PM

55

1248.50

XCSE

GENMAB A/S

07-Apr-2025

16:12:16 PM

44

1248.50

XCSE

GENMAB A/S

07-Apr-2025

16:12:16 PM

25

1248.50

CEUX

GENMAB A/S

07-Apr-2025

16:12:21 PM

40

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:12:21 PM

30

1250.00

CEUX

GENMAB A/S

07-Apr-2025

16:12:34 PM

24

1250.50

XCSE

GENMAB A/S

07-Apr-2025

16:12:36 PM

30

1251.00

XCSE

GENMAB A/S

07-Apr-2025

16:12:40 PM

25

1252.00

CEUX

GENMAB A/S

07-Apr-2025

16:12:48 PM

28

1251.50

AQEU

GENMAB A/S

07-Apr-2025

16:13:16 PM

86

1252.00

XCSE

GENMAB A/S

07-Apr-2025

16:13:21 PM

34

1251.50

TQEX

GENMAB A/S

07-Apr-2025

16:13:21 PM

34

1251.50

CEUX

GENMAB A/S

07-Apr-2025

16:13:30 PM

43

1254.00

CEUX

GENMAB A/S

07-Apr-2025

16:13:30 PM

28

1254.00

AQEU

GENMAB A/S

07-Apr-2025

16:13:55 PM

6

1257.50

XCSE

49


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:13:55 PM

12

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:13:55 PM

40

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:13:55 PM

16

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:15 PM

83

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:16 PM

89

1258.00

XCSE

GENMAB A/S

07-Apr-2025

16:14:16 PM

10

1258.00

TQEX

GENMAB A/S

07-Apr-2025

16:14:16 PM

24

1258.00

TQEX

GENMAB A/S

07-Apr-2025

16:14:19 PM

90

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:19 PM

29

1256.50

CEUX

GENMAB A/S

07-Apr-2025

16:14:20 PM

17

1256.50

CEUX

GENMAB A/S

07-Apr-2025

16:14:29 PM

44

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:31 PM

4

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:34 PM

70

1258.00

XCSE

GENMAB A/S

07-Apr-2025

16:14:42 PM

28

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:42 PM

51

1256.50

CEUX

GENMAB A/S

07-Apr-2025

16:14:47 PM

42

1255.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:47 PM

45

1255.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:47 PM

36

1255.50

CEUX

GENMAB A/S

07-Apr-2025

16:14:50 PM

36

1254.50

XCSE

GENMAB A/S

07-Apr-2025

16:14:52 PM

24

1256.00

XCSE

GENMAB A/S

07-Apr-2025

16:14:52 PM

38

1256.00

CEUX

GENMAB A/S

07-Apr-2025

16:15:02 PM

28

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:15:02 PM

24

1256.00

CEUX

GENMAB A/S

07-Apr-2025

16:15:04 PM

18

1255.50

TQEX

GENMAB A/S

07-Apr-2025

16:15:11 PM

7

1256.00

XCSE

GENMAB A/S

07-Apr-2025

16:15:14 PM

14

1256.00

XCSE

GENMAB A/S

07-Apr-2025

16:15:28 PM

19

1257.50

CEUX

GENMAB A/S

07-Apr-2025

16:15:38 PM

37

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:15:44 PM

13

1259.50

CEUX

GENMAB A/S

07-Apr-2025

16:15:44 PM

28

1259.50

CEUX

GENMAB A/S

07-Apr-2025

16:15:49 PM

42

1259.50

XCSE

GENMAB A/S

07-Apr-2025

16:15:49 PM

24

1259.50

CEUX

GENMAB A/S

07-Apr-2025

16:16:12 PM

14

1263.00

XCSE

GENMAB A/S

07-Apr-2025

16:16:12 PM

4

1263.00

TQEX

GENMAB A/S

07-Apr-2025

16:16:12 PM

20

1263.00

TQEX

GENMAB A/S

07-Apr-2025

16:16:12 PM

32

1263.00

CEUX

GENMAB A/S

07-Apr-2025

16:16:29 PM

24

1264.50

AQEU

GENMAB A/S

07-Apr-2025

16:16:36 PM

87

1265.50

XCSE

GENMAB A/S

07-Apr-2025

16:16:36 PM

47

1265.00

CEUX

GENMAB A/S

07-Apr-2025

16:16:36 PM

28

1265.00

AQEU

GENMAB A/S

07-Apr-2025

16:16:38 PM

85

1264.50

XCSE

GENMAB A/S

07-Apr-2025

16:16:38 PM

42

1264.00

CEUX

GENMAB A/S

07-Apr-2025

16:16:38 PM

2

1264.00

CEUX

50


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:16:39 PM

41

1263.00

XCSE

GENMAB A/S

07-Apr-2025

16:16:39 PM

11

1263.00

XCSE

GENMAB A/S

07-Apr-2025

16:16:41 PM

45

1263.00

CEUX

GENMAB A/S

07-Apr-2025

16:16:59 PM

34

1265.00

XCSE

GENMAB A/S

07-Apr-2025

16:16:59 PM

16

1265.00

XCSE

GENMAB A/S

07-Apr-2025

16:17:12 PM

46

1266.50

XCSE

GENMAB A/S

07-Apr-2025

16:17:12 PM

29

1266.00

CEUX

GENMAB A/S

07-Apr-2025

16:17:18 PM

30

1265.50

XCSE

GENMAB A/S

07-Apr-2025

16:17:21 PM

16

1265.50

XCSE

GENMAB A/S

07-Apr-2025

16:17:46 PM

70

1268.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:06 PM

75

1268.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:06 PM

7

1267.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:06 PM

4

1267.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:06 PM

59

1267.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:06 PM

30

1268.00

TQEX

GENMAB A/S

07-Apr-2025

16:18:06 PM

42

1268.50

CEUX

GENMAB A/S

07-Apr-2025

16:18:06 PM

8

1267.50

CEUX

GENMAB A/S

07-Apr-2025

16:18:06 PM

32

1267.50

CEUX

GENMAB A/S

07-Apr-2025

16:18:11 PM

42

1266.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:11 PM

32

1267.00

TQEX

GENMAB A/S

07-Apr-2025

16:18:11 PM

25

1266.00

CEUX

GENMAB A/S

07-Apr-2025

16:18:11 PM

37

1267.00

AQEU

GENMAB A/S

07-Apr-2025

16:18:12 PM

46

1265.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:12 PM

7

1266.00

CEUX

GENMAB A/S

07-Apr-2025

16:18:14 PM

27

1265.00

CEUX

GENMAB A/S

07-Apr-2025

16:18:28 PM

20

1266.50

CEUX

GENMAB A/S

07-Apr-2025

16:18:28 PM

9

1266.50

CEUX

GENMAB A/S

07-Apr-2025

16:18:47 PM

58

1267.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:56 PM

43

1266.50

XCSE

GENMAB A/S

07-Apr-2025

16:18:56 PM

26

1266.00

CEUX

GENMAB A/S

07-Apr-2025

16:19:00 PM

24

1265.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:11 PM

22

1264.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:11 PM

19

1264.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:11 PM

27

1265.00

CEUX

GENMAB A/S

07-Apr-2025

16:19:12 PM

24

1264.00

CEUX

GENMAB A/S

07-Apr-2025

16:19:35 PM

20

1264.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:35 PM

60

1264.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:35 PM

2

1263.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:45 PM

24

1264.00

CEUX

GENMAB A/S

07-Apr-2025

16:19:46 PM

32

1263.50

XCSE

GENMAB A/S

07-Apr-2025

16:19:48 PM

36

1263.50

AQEU

GENMAB A/S

07-Apr-2025

16:19:49 PM

27

1263.00

CEUX

GENMAB A/S

07-Apr-2025

16:20:00 PM

55

1262.00

XCSE

51


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:20:00 PM

40

1262.00

TQEX

GENMAB A/S

07-Apr-2025

16:20:00 PM

24

1262.00

CEUX

GENMAB A/S

07-Apr-2025

16:20:53 PM

50

1260.50

XCSE

GENMAB A/S

07-Apr-2025

16:20:53 PM

40

1260.50

XCSE

GENMAB A/S

07-Apr-2025

16:20:53 PM

30

1260.50

XCSE

GENMAB A/S

07-Apr-2025

16:20:53 PM

24

1260.50

CEUX

GENMAB A/S

07-Apr-2025

16:21:05 PM

27

1259.50

XCSE

GENMAB A/S

07-Apr-2025

16:21:05 PM

25

1259.50

CEUX

GENMAB A/S

07-Apr-2025

16:21:23 PM

58

1259.00

XCSE

GENMAB A/S

07-Apr-2025

16:21:25 PM

55

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:21:25 PM

32

1258.50

CEUX

GENMAB A/S

07-Apr-2025

16:21:25 PM

33

1258.00

AQEU

GENMAB A/S

07-Apr-2025

16:21:37 PM

47

1257.00

CEUX

GENMAB A/S

07-Apr-2025

16:21:48 PM

23

1258.00

XCSE

GENMAB A/S

07-Apr-2025

16:21:48 PM

30

1258.00

XCSE

GENMAB A/S

07-Apr-2025

16:21:48 PM

7

1258.00

XCSE

GENMAB A/S

07-Apr-2025

16:21:48 PM

42

1258.00

CEUX

GENMAB A/S

07-Apr-2025

16:22:02 PM

86

1258.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:06 PM

31

1258.00

CEUX

GENMAB A/S

07-Apr-2025

16:22:07 PM

2

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:07 PM

17

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:07 PM

70

1257.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:08 PM

80

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:08 PM

5

1256.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:08 PM

24

1256.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:08 PM

46

1257.00

CEUX

GENMAB A/S

07-Apr-2025

16:22:10 PM

29

1255.50

CEUX

GENMAB A/S

07-Apr-2025

16:22:14 PM

37

1256.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:16 PM

1

1255.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:16 PM

32

1255.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:16 PM

28

1254.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:16 PM

25

1254.00

CEUX

GENMAB A/S

07-Apr-2025

16:22:52 PM

45

1257.00

XCSE

GENMAB A/S

07-Apr-2025

16:22:52 PM

30

1257.50

TQEX

GENMAB A/S

07-Apr-2025

16:22:53 PM

33

1256.50

CEUX

GENMAB A/S

07-Apr-2025

16:22:54 PM

39

1255.50

XCSE

GENMAB A/S

07-Apr-2025

16:22:54 PM

24

1255.50

CEUX

GENMAB A/S

07-Apr-2025

16:23:02 PM

24

1254.50

CEUX

GENMAB A/S

07-Apr-2025

16:23:24 PM

26

1254.00

XCSE

GENMAB A/S

07-Apr-2025

16:23:24 PM

27

1253.00

XCSE

GENMAB A/S

07-Apr-2025

16:23:24 PM

12

1253.00

XCSE

GENMAB A/S

07-Apr-2025

16:23:24 PM

24

1253.00

CEUX

GENMAB A/S

07-Apr-2025

16:23:24 PM

34

1253.00

AQEU

52


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:23:33 PM

25

1252.50

TQEX

GENMAB A/S

07-Apr-2025

16:23:33 PM

19

1252.00

CEUX

GENMAB A/S

07-Apr-2025

16:23:44 PM

69

1252.50

XCSE

GENMAB A/S

07-Apr-2025

16:23:49 PM

16

1251.50

XCSE

GENMAB A/S

07-Apr-2025

16:23:49 PM

10

1251.50

XCSE

GENMAB A/S

07-Apr-2025

16:23:49 PM

15

1252.00

CEUX

GENMAB A/S

07-Apr-2025

16:23:59 PM

26

1251.00

CEUX

GENMAB A/S

07-Apr-2025

16:24:07 PM

24

1250.50

CEUX

GENMAB A/S

07-Apr-2025

16:24:24 PM

36

1250.50

TQEX

GENMAB A/S

07-Apr-2025

16:24:24 PM

24

1250.50

CEUX

GENMAB A/S

07-Apr-2025

16:24:56 PM

50

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:24:56 PM

40

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:24:56 PM

15

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:07 PM

40

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:07 PM

11

1250.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:08 PM

40

1249.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:08 PM

36

1249.50

XCSE

GENMAB A/S

07-Apr-2025

16:25:08 PM

27

1249.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:08 PM

24

1248.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:19 PM

59

1247.50

XCSE

GENMAB A/S

07-Apr-2025

16:25:19 PM

25

1247.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:19 PM

31

1247.00

AQEU

GENMAB A/S

07-Apr-2025

16:25:24 PM

88

1246.50

XCSE

GENMAB A/S

07-Apr-2025

16:25:24 PM

30

1245.50

XCSE

GENMAB A/S

07-Apr-2025

16:25:24 PM

56

1245.50

XCSE

GENMAB A/S

07-Apr-2025

16:25:24 PM

26

1246.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:24 PM

30

1245.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:24 PM

4

1245.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:56 PM

50

1247.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:56 PM

24

1246.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:59 PM

16

1246.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:59 PM

11

1246.00

XCSE

GENMAB A/S

07-Apr-2025

16:25:59 PM

21

1245.50

CEUX

GENMAB A/S

07-Apr-2025

16:25:59 PM

3

1245.50

CEUX

GENMAB A/S

07-Apr-2025

16:26:06 PM

20

1246.00

XCSE

GENMAB A/S

07-Apr-2025

16:26:14 PM

35

1246.00

XCSE

GENMAB A/S

07-Apr-2025

16:26:14 PM

29

1245.50

CEUX

GENMAB A/S

07-Apr-2025

16:26:15 PM

49

1245.00

XCSE

GENMAB A/S

07-Apr-2025

16:26:45 PM

61

1247.50

XCSE

GENMAB A/S

07-Apr-2025

16:26:45 PM

1

1247.50

XCSE

GENMAB A/S

07-Apr-2025

16:27:03 PM

66

1247.50

XCSE

GENMAB A/S

07-Apr-2025

16:27:04 PM

41

1247.00

CEUX

GENMAB A/S

07-Apr-2025

16:27:18 PM

51

1246.50

XCSE

53


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:27:18 PM

44

1246.50

TQEX

GENMAB A/S

07-Apr-2025

16:27:24 PM

31

1246.00

CEUX

GENMAB A/S

07-Apr-2025

16:27:24 PM

41

1246.00

AQEU

GENMAB A/S

07-Apr-2025

16:27:36 PM

90

1247.50

XCSE

GENMAB A/S

07-Apr-2025

16:27:38 PM

32

1247.00

CEUX

GENMAB A/S

07-Apr-2025

16:27:38 PM

26

1247.00

CEUX

GENMAB A/S

07-Apr-2025

16:27:55 PM

78

1246.50

XCSE

GENMAB A/S

07-Apr-2025

16:28:00 PM

54

1246.00

CEUX

GENMAB A/S

07-Apr-2025

16:28:07 PM

59

1245.50

XCSE

GENMAB A/S

07-Apr-2025

16:28:07 PM

29

1245.00

CEUX

GENMAB A/S

07-Apr-2025

16:28:15 PM

8

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:28:15 PM

33

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:28:22 PM

52

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:28:22 PM

44

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:28:24 PM

58

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:28:24 PM

21

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:28:24 PM

7

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:28:43 PM

45

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:28:43 PM

24

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:28:48 PM

29

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:28:50 PM

29

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:29:04 PM

24

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:29:14 PM

16

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:29:14 PM

8

1239.00

XCSE

GENMAB A/S

07-Apr-2025

16:29:17 PM

24

1238.50

CEUX

GENMAB A/S

07-Apr-2025

16:29:23 PM

8

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:29:23 PM

30

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:29:23 PM

24

1237.50

CEUX

GENMAB A/S

07-Apr-2025

16:29:51 PM

40

1237.00

XCSE

GENMAB A/S

07-Apr-2025

16:30:01 PM

11

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:30:03 PM

40

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:30:03 PM

19

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:30:03 PM

15

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:08 PM

2

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:30:08 PM

56

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:30:08 PM

2

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:30:08 PM

17

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:30:08 PM

3

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:08 PM

14

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:08 PM

13

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:12 PM

11

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:30:12 PM

10

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:12 PM

2

1238.00

CEUX

54


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:30:28 PM

90

1238.00

XCSE

GENMAB A/S

07-Apr-2025

16:30:28 PM

27

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:30:28 PM

3

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:30:28 PM

5

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:30:28 PM

25

1238.50

AQEU

GENMAB A/S

07-Apr-2025

16:30:57 PM

15

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:30:57 PM

20

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:30:57 PM

40

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:31:07 PM

17

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:31:07 PM

40

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:31:07 PM

20

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:31:07 PM

86

1240.00

XCSE

GENMAB A/S

07-Apr-2025

16:31:07 PM

59

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:31:07 PM

10

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:31:08 PM

24

1239.50

AQEU

GENMAB A/S

07-Apr-2025

16:31:30 PM

77

1238.50

XCSE

GENMAB A/S

07-Apr-2025

16:31:30 PM

38

1238.50

TQEX

GENMAB A/S

07-Apr-2025

16:31:30 PM

37

1239.00

CEUX

GENMAB A/S

07-Apr-2025

16:31:31 PM

15

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:31:31 PM

19

1238.00

CEUX

GENMAB A/S

07-Apr-2025

16:31:43 PM

75

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:31:52 PM

25

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:08 PM

8

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:32:10 PM

8

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:32:10 PM

58

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:32:10 PM

29

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:11 PM

24

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:12 PM

8

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:32:12 PM

47

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:32:12 PM

12

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:32:13 PM

19

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:14 PM

2

1240.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:33 PM

26

1243.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:38 PM

16

1243.00

CEUX

GENMAB A/S

07-Apr-2025

16:32:47 PM

20

1243.50

XCSE

GENMAB A/S

07-Apr-2025

16:32:47 PM

40

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:32:47 PM

20

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:32:47 PM

88

1243.50

XCSE

GENMAB A/S

07-Apr-2025

16:32:47 PM

37

1244.00

TQEX

GENMAB A/S

07-Apr-2025

16:32:47 PM

9

1243.50

AQEU

GENMAB A/S

07-Apr-2025

16:32:47 PM

1

1243.50

AQEU

GENMAB A/S

07-Apr-2025

16:32:47 PM

29

1243.50

AQEU

GENMAB A/S

07-Apr-2025

16:32:49 PM

39

1243.00

CEUX

55


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:32:51 PM

67

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:33:05 PM

30

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:33:05 PM

38

1243.00

CEUX

GENMAB A/S

07-Apr-2025

16:33:06 PM

46

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:33:15 PM

33

1241.50

XCSE

GENMAB A/S

07-Apr-2025

16:33:15 PM

26

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:33:33 PM

2

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:33:33 PM

19

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:33:33 PM

14

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:33:46 PM

23

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:33:52 PM

40

1244.00

XCSE

GENMAB A/S

07-Apr-2025

16:33:52 PM

36

1243.50

CEUX

GENMAB A/S

07-Apr-2025

16:33:54 PM

58

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:04 PM

10

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:04 PM

43

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:37 PM

21

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:37 PM

24

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:37 PM

40

1243.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:37 PM

26

1242.50

CEUX

GENMAB A/S

07-Apr-2025

16:34:45 PM

23

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:45 PM

18

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:45 PM

1

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:34:45 PM

2

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:34:45 PM

40

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:34:45 PM

5

1242.50

XCSE

GENMAB A/S

07-Apr-2025

16:34:54 PM

63

1242.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:54 PM

33

1242.00

CEUX

GENMAB A/S

07-Apr-2025

16:34:59 PM

62

1241.00

XCSE

GENMAB A/S

07-Apr-2025

16:34:59 PM

26

1241.00

CEUX

GENMAB A/S

07-Apr-2025

16:35:10 PM

24

1241.00

AQEU

GENMAB A/S

07-Apr-2025

16:35:12 PM

41

1240.50

XCSE

GENMAB A/S

07-Apr-2025

16:35:12 PM

36

1240.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

48

1239.50

XCSE

GENMAB A/S

07-Apr-2025

16:35:13 PM

3

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

2

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

5

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

28

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

3

1239.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:13 PM

24

1240.00

AQEU

GENMAB A/S

07-Apr-2025

16:35:16 PM

25

1239.50

TQEX

GENMAB A/S

07-Apr-2025

16:35:26 PM

24

1239.00

TQEX

GENMAB A/S

07-Apr-2025

16:35:36 PM

24

1238.50

XCSE

GENMAB A/S

07-Apr-2025

16:35:36 PM

31

1238.00

CEUX

56


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:35:48 PM

39

1237.00

XCSE

GENMAB A/S

07-Apr-2025

16:35:48 PM

34

1236.00

XCSE

GENMAB A/S

07-Apr-2025

16:35:48 PM

25

1236.50

CEUX

GENMAB A/S

07-Apr-2025

16:35:49 PM

49

1236.50

XCSE

GENMAB A/S

07-Apr-2025

16:36:03 PM

28

1236.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:07 PM

34

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:07 PM

31

1235.00

CEUX

GENMAB A/S

07-Apr-2025

16:36:36 PM

40

1235.50

XCSE

GENMAB A/S

07-Apr-2025

16:36:36 PM

43

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:40 PM

29

1236.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:40 PM

27

1236.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:43 PM

17

1235.50

CEUX

GENMAB A/S

07-Apr-2025

16:36:49 PM

31

1235.50

CEUX

GENMAB A/S

07-Apr-2025

16:36:52 PM

45

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:57 PM

1

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:36:57 PM

28

1234.00

CEUX

GENMAB A/S

07-Apr-2025

16:37:22 PM

60

1234.50

XCSE

GENMAB A/S

07-Apr-2025

16:37:22 PM

40

1234.50

XCSE

GENMAB A/S

07-Apr-2025

16:37:22 PM

1

1234.50

TQEX

GENMAB A/S

07-Apr-2025

16:37:22 PM

23

1234.50

TQEX

GENMAB A/S

07-Apr-2025

16:37:22 PM

39

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:37:22 PM

4

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:37:22 PM

19

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:37:41 PM

15

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:37:41 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:37:42 PM

13

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:37:51 PM

24

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:37:51 PM

63

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:37:51 PM

24

1234.50

TQEX

GENMAB A/S

07-Apr-2025

16:37:51 PM

48

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:37:51 PM

61

1233.50

CEUX

GENMAB A/S

07-Apr-2025

16:37:51 PM

38

1234.00

AQEU

GENMAB A/S

07-Apr-2025

16:38:02 PM

53

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:02 PM

15

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:38:03 PM

12

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:38:31 PM

88

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

40

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

10

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

11

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

40

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

10

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

2

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:31 PM

20

1233.50

CEUX

57


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:38:31 PM

21

1233.50

CEUX

GENMAB A/S

07-Apr-2025

16:38:36 PM

42

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:38:36 PM

35

1233.00

AQEU

GENMAB A/S

07-Apr-2025

16:38:57 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:57 PM

11

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:57 PM

30

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:38:57 PM

58

1232.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:03 PM

37

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:04 PM

34

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:04 PM

48

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:32 PM

36

1232.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:33 PM

27

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:34 PM

24

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:34 PM

18

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:35 PM

38

1231.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:36 PM

71

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:36 PM

7

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:39:36 PM

30

1230.50

TQEX

GENMAB A/S

07-Apr-2025

16:39:37 PM

27

1229.50

TQEX

GENMAB A/S

07-Apr-2025

16:39:37 PM

34

1230.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:46 PM

43

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:39:46 PM

24

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:39:58 PM

30

1228.50

XCSE

GENMAB A/S

07-Apr-2025

16:40:13 PM

11

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:40:13 PM

40

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:40:13 PM

10

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:40:13 PM

9

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:40:13 PM

36

1230.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:13 PM

35

1229.50

AQEU

GENMAB A/S

07-Apr-2025

16:40:22 PM

55

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:40:22 PM

2

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:22 PM

40

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:22 PM

2

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:22 PM

10

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:23 PM

5

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:23 PM

7

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:28 PM

39

1227.50

XCSE

GENMAB A/S

07-Apr-2025

16:40:30 PM

2

1227.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:30 PM

32

1227.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:39 PM

40

1227.00

CEUX

GENMAB A/S

07-Apr-2025

16:40:40 PM

44

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:33 PM

58

1226.00

XCSE

GENMAB A/S

07-Apr-2025

16:41:33 PM

30

1226.50

XCSE

58


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:41:33 PM

12

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:33 PM

11

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:33 PM

42

1225.50

TQEX

GENMAB A/S

07-Apr-2025

16:41:33 PM

24

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:41:50 PM

87

1226.00

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

40

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

22

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

12

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

2

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

12

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

12

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

40

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

11

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

38

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

3

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:41:50 PM

44

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:41:50 PM

36

1226.00

AQEU

GENMAB A/S

07-Apr-2025

16:41:59 PM

37

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:41:59 PM

3

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:42:04 PM

15

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:42:04 PM

13

1225.50

CEUX

GENMAB A/S

07-Apr-2025

16:42:07 PM

14

1226.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:07 PM

40

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:42:07 PM

22

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:42:07 PM

16

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:42:14 PM

19

1226.50

XCSE

GENMAB A/S

07-Apr-2025

16:42:17 PM

45

1226.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:17 PM

40

1225.50

XCSE

GENMAB A/S

07-Apr-2025

16:42:17 PM

2

1226.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:17 PM

39

1225.50

TQEX

GENMAB A/S

07-Apr-2025

16:42:17 PM

46

1226.00

CEUX

GENMAB A/S

07-Apr-2025

16:42:29 PM

36

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:29 PM

11

1227.00

CEUX

GENMAB A/S

07-Apr-2025

16:42:29 PM

26

1227.00

CEUX

GENMAB A/S

07-Apr-2025

16:42:44 PM

45

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:45 PM

19

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:46 PM

11

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:42:57 PM

40

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:43:08 PM

36

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:08 PM

27

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:08 PM

43

1227.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:09 PM

53

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:43:09 PM

14

1227.00

XCSE

59


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:43:16 PM

66

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:43:16 PM

70

1227.50

XCSE

GENMAB A/S

07-Apr-2025

16:43:16 PM

37

1227.50

XCSE

GENMAB A/S

07-Apr-2025

16:43:16 PM

28

1227.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:29 PM

39

1227.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:34 PM

37

1227.00

XCSE

GENMAB A/S

07-Apr-2025

16:43:34 PM

33

1226.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:37 PM

35

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:43:38 PM

20

1228.50

XCSE

GENMAB A/S

07-Apr-2025

16:43:38 PM

16

1228.50

XCSE

GENMAB A/S

07-Apr-2025

16:43:38 PM

22

1228.00

TQEX

GENMAB A/S

07-Apr-2025

16:43:38 PM

16

1228.00

TQEX

GENMAB A/S

07-Apr-2025

16:43:38 PM

35

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:44:00 PM

39

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:44:04 PM

15

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:44:10 PM

81

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:44:10 PM

5

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:44:10 PM

31

1229.50

AQEU

GENMAB A/S

07-Apr-2025

16:44:11 PM

42

1228.50

XCSE

GENMAB A/S

07-Apr-2025

16:44:11 PM

24

1228.50

AQEU

GENMAB A/S

07-Apr-2025

16:44:15 PM

20

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:44:16 PM

53

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:44:16 PM

16

1228.00

CEUX

GENMAB A/S

07-Apr-2025

16:44:26 PM

1

1228.00

XCSE

GENMAB A/S

07-Apr-2025

16:44:47 PM

88

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:44:53 PM

67

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:44:53 PM

5

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:44:53 PM

40

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:00 PM

7

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:45:00 PM

18

1229.00

CEUX

GENMAB A/S

07-Apr-2025

16:45:14 PM

40

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:14 PM

20

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:14 PM

40

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:14 PM

44

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:45:26 PM

20

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:45:26 PM

20

1230.00

TQEX

GENMAB A/S

07-Apr-2025

16:45:26 PM

9

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:45:26 PM

36

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:45:49 PM

89

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:49 PM

24

1231.00

CEUX

GENMAB A/S

07-Apr-2025

16:45:53 PM

81

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:53 PM

6

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:53 PM

32

1232.00

CEUX

60


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:45:54 PM

12

1232.50

XCSE

GENMAB A/S

07-Apr-2025

16:45:54 PM

40

1232.50

XCSE

GENMAB A/S

07-Apr-2025

16:45:55 PM

32

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:45:55 PM

16

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:12 PM

52

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:12 PM

32

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:14 PM

88

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:14 PM

36

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:15 PM

31

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:15 PM

13

1230.00

TQEX

GENMAB A/S

07-Apr-2025

16:46:15 PM

18

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:15 PM

22

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:15 PM

35

1230.50

AQEU

GENMAB A/S

07-Apr-2025

16:46:16 PM

3

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:33 PM

2

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:38 PM

40

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:38 PM

39

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:38 PM

11

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:38 PM

4

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:46:44 PM

12

1231.00

TQEX

GENMAB A/S

07-Apr-2025

16:46:45 PM

10

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

11

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

40

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

12

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

12

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

40

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

11

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

9

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:46:45 PM

28

1231.00

TQEX

GENMAB A/S

07-Apr-2025

16:46:52 PM

38

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:46:52 PM

24

1231.00

TQEX

GENMAB A/S

07-Apr-2025

16:46:52 PM

35

1231.00

AQEU

GENMAB A/S

07-Apr-2025

16:47:04 PM

50

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:04 PM

36

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

6

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

14

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

5

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

7

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

8

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

7

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

3

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

2

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:04 PM

1

1230.50

CEUX

61


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:47:06 PM

42

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:07 PM

31

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:07 PM

7

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:09 PM

24

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:16 PM

10

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:16 PM

21

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:30 PM

40

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:47:30 PM

32

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:30 PM

24

1228.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:31 PM

72

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:39 PM

29

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:39 PM

32

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:47:47 PM

40

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:47:47 PM

20

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:47:47 PM

12

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:47:57 PM

28

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:47:57 PM

28

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:02 PM

4

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:02 PM

34

1229.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:19 PM

36

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:20 PM

32

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:25 PM

40

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

10

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

11

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

12

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

12

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

40

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

11

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

40

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:25 PM

6

1230.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:30 PM

3

1229.50

TQEX

GENMAB A/S

07-Apr-2025

16:48:30 PM

61

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:30 PM

39

1230.00

AQEU

GENMAB A/S

07-Apr-2025

16:48:31 PM

22

1229.50

TQEX

GENMAB A/S

07-Apr-2025

16:48:31 PM

2

1229.50

TQEX

GENMAB A/S

07-Apr-2025

16:48:31 PM

16

1229.50

TQEX

GENMAB A/S

07-Apr-2025

16:48:37 PM

12

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:37 PM

12

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:37 PM

20

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:37 PM

10

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:37 PM

10

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:37 PM

4

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:48 PM

51

1229.00

XCSE

62


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:48:48 PM

11

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:48 PM

11

1229.50

XCSE

GENMAB A/S

07-Apr-2025

16:48:48 PM

32

1229.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:54 PM

31

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:55 PM

10

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:55 PM

40

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:55 PM

11

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:55 PM

14

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:56 PM

4

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:48:59 PM

23

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:48:59 PM

19

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:17 PM

41

1230.00

TQEX

GENMAB A/S

07-Apr-2025

16:49:17 PM

36

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:17 PM

11

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:29 PM

54

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:29 PM

40

1230.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:29 PM

36

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:29 PM

9

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:41 PM

34

1230.00

AQEU

GENMAB A/S

07-Apr-2025

16:49:42 PM

18

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:42 PM

40

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:42 PM

1

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:49:43 PM

36

1231.00

CEUX

GENMAB A/S

07-Apr-2025

16:49:45 PM

32

1231.00

CEUX

GENMAB A/S

07-Apr-2025

16:49:54 PM

29

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:54 PM

18

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:49:56 PM

25

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:50:03 PM

55

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:03 PM

17

1231.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:03 PM

45

1230.50

CEUX

GENMAB A/S

07-Apr-2025

16:50:21 PM

15

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:21 PM

17

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:50:24 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:24 PM

39

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:24 PM

7

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:50:24 PM

27

1233.50

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

30

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

20

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

12

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

39

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:50:27 PM

16

1233.00

CEUX

63


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:50:33 PM

24

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:50:35 PM

14

1233.00

TQEX

GENMAB A/S

07-Apr-2025

16:50:37 PM

32

1233.50

CEUX

GENMAB A/S

07-Apr-2025

16:50:38 PM

27

1233.00

TQEX

GENMAB A/S

07-Apr-2025

16:51:02 PM

16

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:02 PM

16

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:11 PM

28

1232.50

XCSE

GENMAB A/S

07-Apr-2025

16:51:11 PM

85

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:11 PM

29

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:11 PM

29

1232.00

AQEU

GENMAB A/S

07-Apr-2025

16:51:23 PM

16

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:23 PM

6

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:25 PM

26

1233.50

CEUX

GENMAB A/S

07-Apr-2025

16:51:25 PM

11

1233.50

CEUX

GENMAB A/S

07-Apr-2025

16:51:26 PM

47

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:26 PM

39

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:31 PM

5

1232.50

TQEX

GENMAB A/S

07-Apr-2025

16:51:31 PM

26

1232.50

TQEX

GENMAB A/S

07-Apr-2025

16:51:31 PM

36

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:31 PM

6

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

27

1235.50

XCSE

GENMAB A/S

07-Apr-2025

16:51:41 PM

40

1235.50

XCSE

GENMAB A/S

07-Apr-2025

16:51:41 PM

86

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:41 PM

36

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

7

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

7

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

36

1235.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

7

1235.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

7

1235.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

13

1235.00

CEUX

GENMAB A/S

07-Apr-2025

16:51:41 PM

24

1234.50

AQEU

GENMAB A/S

07-Apr-2025

16:51:47 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:47 PM

12

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:47 PM

11

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:47 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

85

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

40

1234.50

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

33

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

18

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

12

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

10

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:49 PM

36

1235.00

XCSE

64


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:51:58 PM

24

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:51:58 PM

36

1235.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:02 PM

32

1235.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:03 PM

29

1235.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:09 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:09 PM

11

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:09 PM

10

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:09 PM

20

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:09 PM

21

1234.50

TQEX

GENMAB A/S

07-Apr-2025

16:52:09 PM

15

1234.50

TQEX

GENMAB A/S

07-Apr-2025

16:52:09 PM

26

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:13 PM

40

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:13 PM

11

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:13 PM

10

1235.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:13 PM

18

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:14 PM

6

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:16 PM

42

1234.50

CEUX

GENMAB A/S

07-Apr-2025

16:52:20 PM

33

1234.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:20 PM

36

1234.50

XCSE

GENMAB A/S

07-Apr-2025

16:52:20 PM

27

1234.00

AQEU

GENMAB A/S

07-Apr-2025

16:52:22 PM

33

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:22 PM

8

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:52:23 PM

18

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:52:24 PM

9

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:24 PM

28

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:24 PM

24

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:52:48 PM

37

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:52:50 PM

32

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:52:52 PM

26

1231.50

TQEX

GENMAB A/S

07-Apr-2025

16:52:52 PM

41

1231.50

CEUX

GENMAB A/S

07-Apr-2025

16:53:09 PM

32

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:53:09 PM

24

1232.00

AQEU

GENMAB A/S

07-Apr-2025

16:53:16 PM

24

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:53:19 PM

88

1231.50

XCSE

GENMAB A/S

07-Apr-2025

16:53:19 PM

27

1232.00

CEUX

GENMAB A/S

07-Apr-2025

16:53:28 PM

10

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:53:28 PM

12

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:53:29 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:53:29 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:53:29 PM

10

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:53:30 PM

4

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:53:30 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:53:33 PM

30

1233.00

CEUX

65


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

07-Apr-2025

16:53:41 PM

5

1232.50

CEUX

GENMAB A/S

07-Apr-2025

16:53:41 PM

17

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:53:41 PM

19

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:53:49 PM

3

1232.00

AQEU

GENMAB A/S

07-Apr-2025

16:53:51 PM

40

1232.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:07 PM

47

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:54:11 PM

37

1233.00

TQEX

GENMAB A/S

07-Apr-2025

16:54:11 PM

7

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:54:11 PM

19

1233.00

AQEU

GENMAB A/S

07-Apr-2025

16:54:11 PM

10

1233.00

AQEU

GENMAB A/S

07-Apr-2025

16:54:12 PM

33

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:54:13 PM

7

1233.00

CEUX

GENMAB A/S

07-Apr-2025

16:54:15 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:15 PM

11

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:15 PM

12

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:16 PM

40

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:16 PM

73

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:16 PM

113

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:17 PM

113

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:19 PM

36

1233.00

XCSE

GENMAB A/S

07-Apr-2025

16:54:34 PM

1

1233.50

XCSE

GENMAB A/S

08-Apr-2025

09:59:10 AM

72

1241.00

XCSE

GENMAB A/S

08-Apr-2025

09:59:10 AM

76

1241.00

CEUX

GENMAB A/S

08-Apr-2025

10:00:02 AM

82

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:00:02 AM

71

1240.00

CEUX

GENMAB A/S

08-Apr-2025

10:00:02 AM

79

1240.00

AQEU

GENMAB A/S

08-Apr-2025

10:00:07 AM

27

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:00:11 AM

24

1239.00

XCSE

GENMAB A/S

08-Apr-2025

10:00:11 AM

65

1239.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:11 AM

17

1239.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:11 AM

72

1239.00

AQEU

GENMAB A/S

08-Apr-2025

10:00:13 AM

13

1238.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:13 AM

58

1238.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:13 AM

53

1238.50

CEUX

GENMAB A/S

08-Apr-2025

10:00:18 AM

24

1238.00

XCSE

GENMAB A/S

08-Apr-2025

10:00:18 AM

50

1238.00

AQEU

GENMAB A/S

08-Apr-2025

10:00:23 AM

16

1237.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:24 AM

14

1237.50

TQEX

GENMAB A/S

08-Apr-2025

10:00:24 AM

5

1237.50

TQEX

GENMAB A/S

08-Apr-2025

10:01:00 AM

25

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:01:03 AM

28

1239.00

CEUX

GENMAB A/S

08-Apr-2025

10:01:12 AM

28

1238.50

XCSE

GENMAB A/S

08-Apr-2025

10:01:12 AM

32

1238.00

CEUX

66


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

10:01:22 AM

26

1237.50

XCSE

GENMAB A/S

08-Apr-2025

10:01:57 AM

31

1236.50

CEUX

GENMAB A/S

08-Apr-2025

10:02:52 AM

33

1237.00

XCSE

GENMAB A/S

08-Apr-2025

10:02:52 AM

42

1237.50

CEUX

GENMAB A/S

08-Apr-2025

10:03:21 AM

34

1236.50

CEUX

GENMAB A/S

08-Apr-2025

10:04:38 AM

49

1238.50

CEUX

GENMAB A/S

08-Apr-2025

10:04:49 AM

69

1238.00

XCSE

GENMAB A/S

08-Apr-2025

10:04:49 AM

35

1237.50

CEUX

GENMAB A/S

08-Apr-2025

10:04:53 AM

80

1237.00

XCSE

GENMAB A/S

08-Apr-2025

10:05:18 AM

27

1236.00

XCSE

GENMAB A/S

08-Apr-2025

10:05:18 AM

8

1236.50

CEUX

GENMAB A/S

08-Apr-2025

10:05:18 AM

28

1236.50

CEUX

GENMAB A/S

08-Apr-2025

10:05:22 AM

3

1235.50

CEUX

GENMAB A/S

08-Apr-2025

10:05:22 AM

22

1235.50

CEUX

GENMAB A/S

08-Apr-2025

10:06:37 AM

33

1237.50

CEUX

GENMAB A/S

08-Apr-2025

10:06:46 AM

4

1237.00

XCSE

GENMAB A/S

08-Apr-2025

10:09:44 AM

2

1239.50

TQEX

GENMAB A/S

08-Apr-2025

10:09:44 AM

4

1239.50

CEUX

GENMAB A/S

08-Apr-2025

10:09:44 AM

47

1239.50

CEUX

GENMAB A/S

08-Apr-2025

10:09:45 AM

26

1239.50

TQEX

GENMAB A/S

08-Apr-2025

10:10:18 AM

22

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:18 AM

23

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:18 AM

1

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:18 AM

47

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:18 AM

16

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:18 AM

4

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:10:27 AM

82

1240.50

CEUX

GENMAB A/S

08-Apr-2025

10:10:32 AM

50

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:10:32 AM

35

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:10:34 AM

82

1239.50

CEUX

GENMAB A/S

08-Apr-2025

10:10:37 AM

83

1239.00

XCSE

GENMAB A/S

08-Apr-2025

10:10:42 AM

53

1238.50

CEUX

GENMAB A/S

08-Apr-2025

10:10:44 AM

84

1238.00

XCSE

GENMAB A/S

08-Apr-2025

10:12:19 AM

33

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:12:20 AM

53

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:12:20 AM

29

1240.50

CEUX

GENMAB A/S

08-Apr-2025

10:12:43 AM

84

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:12:58 AM

25

1239.50

CEUX

GENMAB A/S

08-Apr-2025

10:13:01 AM

2

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:14:07 AM

1

1241.00

CEUX

GENMAB A/S

08-Apr-2025

10:14:07 AM

40

1241.00

CEUX

GENMAB A/S

08-Apr-2025

10:14:58 AM

85

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:14:58 AM

42

1241.00

CEUX

67


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

10:15:08 AM

36

1240.00

CEUX

GENMAB A/S

08-Apr-2025

10:15:26 AM

15

1240.00

CEUX

GENMAB A/S

08-Apr-2025

10:15:26 AM

11

1240.00

CEUX

GENMAB A/S

08-Apr-2025

10:15:37 AM

84

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:15:39 AM

45

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:15:39 AM

16

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:16:16 AM

27

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:16:16 AM

3

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:16:16 AM

15

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:18:01 AM

26

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:18:01 AM

5

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:18:01 AM

29

1240.50

AQEU

GENMAB A/S

08-Apr-2025

10:18:02 AM

55

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

84

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

39

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

30

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

39

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

5

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:24 AM

87

1240.50

CEUX

GENMAB A/S

08-Apr-2025

10:19:25 AM

15

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:19:25 AM

9

1240.50

XCSE

GENMAB A/S

08-Apr-2025

10:20:16 AM

22

1241.00

XCSE

GENMAB A/S

08-Apr-2025

10:20:16 AM

67

1241.00

XCSE

GENMAB A/S

08-Apr-2025

10:21:23 AM

86

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:21:23 AM

44

1239.50

CEUX

GENMAB A/S

08-Apr-2025

10:21:24 AM

64

1238.50

XCSE

GENMAB A/S

08-Apr-2025

10:21:24 AM

22

1238.50

XCSE

GENMAB A/S

08-Apr-2025

10:21:24 AM

24

1238.50

CEUX

GENMAB A/S

08-Apr-2025

10:22:06 AM

88

1238.50

XCSE

GENMAB A/S

08-Apr-2025

10:22:06 AM

75

1238.50

CEUX

GENMAB A/S

08-Apr-2025

10:23:01 AM

74

1239.00

CEUX

GENMAB A/S

08-Apr-2025

10:23:25 AM

14

1238.50

XCSE

GENMAB A/S

08-Apr-2025

10:23:46 AM

40

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:23:46 AM

16

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:23:46 AM

39

1239.50

XCSE

GENMAB A/S

08-Apr-2025

10:24:04 AM

35

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:04 AM

36

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:04 AM

39

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

16

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

39

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

16

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

16

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

26

1240.00

XCSE

68


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

10:24:05 AM

15

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

39

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

16

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

40

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:05 AM

3

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:18 AM

54

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:18 AM

40

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:18 AM

10

1240.00

XCSE

GENMAB A/S

08-Apr-2025

10:24:31 AM

46

1239.00

CEUX

GENMAB A/S

08-Apr-2025

10:25:58 AM

85

1241.50

XCSE

GENMAB A/S

08-Apr-2025

10:26:11 AM

34

1241.50

XCSE

GENMAB A/S

08-Apr-2025

10:26:11 AM

16

1241.50

XCSE

GENMAB A/S

08-Apr-2025

10:26:31 AM

99

1242.00

XCSE

GENMAB A/S

08-Apr-2025

10:26:47 AM

86

1241.50

XCSE

GENMAB A/S

08-Apr-2025

10:27:23 AM

86

1242.50

XCSE

GENMAB A/S

08-Apr-2025

10:29:05 AM

87

1243.50

XCSE

GENMAB A/S

08-Apr-2025

10:29:05 AM

85

1243.50

CEUX

GENMAB A/S

08-Apr-2025

10:30:11 AM

86

1242.50

XCSE

GENMAB A/S

08-Apr-2025

10:30:11 AM

88

1242.50

CEUX

GENMAB A/S

08-Apr-2025

10:30:26 AM

86

1241.50

XCSE

GENMAB A/S

08-Apr-2025

10:30:26 AM

43

1241.50

CEUX

GENMAB A/S

08-Apr-2025

10:30:26 AM

43

1241.50

CEUX

GENMAB A/S

08-Apr-2025

10:30:30 AM

24

1241.00

TQEX

GENMAB A/S

08-Apr-2025

10:30:50 AM

25

1242.00

TQEX

GENMAB A/S

08-Apr-2025

10:32:01 AM

31

1241.00

XCSE

GENMAB A/S

08-Apr-2025

10:32:01 AM

57

1241.00

XCSE

GENMAB A/S

08-Apr-2025

10:32:01 AM

27

1241.00

AQEU

GENMAB A/S

08-Apr-2025

10:32:01 AM

61

1241.00

CEUX

GENMAB A/S

08-Apr-2025

10:33:42 AM

83

1245.50

XCSE

GENMAB A/S

08-Apr-2025

10:34:05 AM

36

1245.00

CEUX

GENMAB A/S

08-Apr-2025

10:34:05 AM

46

1245.00

CEUX

GENMAB A/S

08-Apr-2025

10:35:00 AM

41

1246.00

XCSE

GENMAB A/S

08-Apr-2025

10:35:00 AM

39

1246.00

XCSE

GENMAB A/S

08-Apr-2025

10:35:00 AM

10

1246.00

XCSE

GENMAB A/S

08-Apr-2025

10:35:16 AM

90

1245.00

XCSE

GENMAB A/S

08-Apr-2025

10:35:16 AM

23

1244.50

TQEX

GENMAB A/S

08-Apr-2025

10:36:15 AM

88

1245.00

XCSE

GENMAB A/S

08-Apr-2025

10:36:15 AM

5

1245.00

CEUX

GENMAB A/S

08-Apr-2025

10:36:57 AM

21

1245.00

CEUX

GENMAB A/S

08-Apr-2025

10:37:36 AM

24

1245.50

XCSE

GENMAB A/S

08-Apr-2025

10:37:36 AM

17

1245.50

XCSE

GENMAB A/S

08-Apr-2025

10:39:50 AM

84

1247.50

XCSE

GENMAB A/S

08-Apr-2025

10:39:50 AM

24

1248.00

XCSE

69


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

10:39:50 AM

62

1248.00

XCSE

GENMAB A/S

08-Apr-2025

10:39:50 AM

27

1248.00

XCSE

GENMAB A/S

08-Apr-2025

10:39:50 AM

84

1247.50

CEUX

GENMAB A/S

08-Apr-2025

10:39:50 AM

2

1247.50

CEUX

GENMAB A/S

08-Apr-2025

10:40:37 AM

27

1249.00

TQEX

GENMAB A/S

08-Apr-2025

10:40:40 AM

31

1248.50

XCSE

GENMAB A/S

08-Apr-2025

10:41:25 AM

25

1249.50

XCSE

GENMAB A/S

08-Apr-2025

10:41:25 AM

30

1249.50

XCSE

GENMAB A/S

08-Apr-2025

10:41:26 AM

58

1249.50

XCSE

GENMAB A/S

08-Apr-2025

10:41:58 AM

28

1249.50

XCSE

GENMAB A/S

08-Apr-2025

10:41:58 AM

28

1249.50

XCSE

GENMAB A/S

08-Apr-2025

10:43:21 AM

50

1251.50

XCSE

GENMAB A/S

08-Apr-2025

10:43:21 AM

40

1251.50

XCSE

GENMAB A/S

08-Apr-2025

10:43:21 AM

36

1251.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:21 AM

49

1251.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:38 AM

89

1250.50

XCSE

GENMAB A/S

08-Apr-2025

10:43:38 AM

29

1251.00

TQEX

GENMAB A/S

08-Apr-2025

10:43:38 AM

1

1250.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:38 AM

63

1250.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:38 AM

11

1250.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:38 AM

1

1250.50

CEUX

GENMAB A/S

08-Apr-2025

10:43:40 AM

7

1250.50

CEUX

GENMAB A/S

08-Apr-2025

10:44:48 AM

11

1253.00

TQEX

GENMAB A/S

08-Apr-2025

10:45:29 AM

14

1253.00

TQEX

GENMAB A/S

08-Apr-2025

10:45:29 AM

39

1253.00

AQEU

GENMAB A/S

08-Apr-2025

10:45:30 AM

46

1253.00

XCSE

GENMAB A/S

08-Apr-2025

10:45:30 AM

21

1253.00

XCSE

GENMAB A/S

08-Apr-2025

10:45:54 AM

30

1253.00

XCSE

GENMAB A/S

08-Apr-2025

10:45:54 AM

16

1253.00

XCSE

GENMAB A/S

08-Apr-2025

10:45:54 AM

15

1253.00

XCSE

GENMAB A/S

08-Apr-2025

10:45:54 AM

83

1252.50

CEUX

GENMAB A/S

08-Apr-2025

10:45:58 AM

86

1252.50

XCSE

GENMAB A/S

08-Apr-2025

10:47:07 AM

88

1254.00

XCSE

GENMAB A/S

08-Apr-2025

10:48:34 AM

13

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:48:34 AM

30

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:48:34 AM

45

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:48:34 AM

25

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:49:11 AM

26

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:49:11 AM

61

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:49:11 AM

49

1254.50

CEUX

GENMAB A/S

08-Apr-2025

10:49:11 AM

38

1254.50

CEUX

GENMAB A/S

08-Apr-2025

10:49:45 AM

6

1253.50

XCSE

GENMAB A/S

08-Apr-2025

10:49:45 AM

1

1253.50

TQEX

70


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

10:49:45 AM

55

1253.50

CEUX

GENMAB A/S

08-Apr-2025

10:49:45 AM

21

1253.50

CEUX

GENMAB A/S

08-Apr-2025

10:49:49 AM

77

1253.50

XCSE

GENMAB A/S

08-Apr-2025

10:49:49 AM

23

1253.50

TQEX

GENMAB A/S

08-Apr-2025

10:49:49 AM

14

1253.50

CEUX

GENMAB A/S

08-Apr-2025

10:49:53 AM

15

1252.50

CEUX

GENMAB A/S

08-Apr-2025

10:50:00 AM

35

1252.50

XCSE

GENMAB A/S

08-Apr-2025

10:50:00 AM

54

1252.50

XCSE

GENMAB A/S

08-Apr-2025

10:50:00 AM

1

1252.50

CEUX

GENMAB A/S

08-Apr-2025

10:50:00 AM

71

1252.50

CEUX

GENMAB A/S

08-Apr-2025

10:52:37 AM

87

1254.00

XCSE

GENMAB A/S

08-Apr-2025

10:52:37 AM

40

1254.00

TQEX

GENMAB A/S

08-Apr-2025

10:52:37 AM

28

1253.50

AQEU

GENMAB A/S

08-Apr-2025

10:52:37 AM

88

1254.00

CEUX

GENMAB A/S

08-Apr-2025

10:53:38 AM

22

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:53:38 AM

25

1254.50

XCSE

GENMAB A/S

08-Apr-2025

10:53:38 AM

44

1254.50

TQEX

GENMAB A/S

08-Apr-2025

10:54:32 AM

85

1256.00

XCSE

GENMAB A/S

08-Apr-2025

10:54:32 AM

39

1256.00

CEUX

GENMAB A/S

08-Apr-2025

10:54:32 AM

43

1256.00

CEUX

GENMAB A/S

08-Apr-2025

10:55:12 AM

29

1256.50

XCSE

GENMAB A/S

08-Apr-2025

10:55:12 AM

10

1256.50

XCSE

GENMAB A/S

08-Apr-2025

10:55:12 AM

39

1256.50

TQEX

GENMAB A/S

08-Apr-2025

10:58:04 AM

53

1260.00

CEUX

GENMAB A/S

08-Apr-2025

10:59:28 AM

30

1260.50

XCSE

GENMAB A/S

08-Apr-2025

10:59:28 AM

16

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:03 AM

90

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:03 AM

45

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:03 AM

16

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:03 AM

44

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:03 AM

32

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:00:11 AM

30

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:11 AM

45

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:11 AM

14

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:11 AM

24

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:12 AM

27

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:13 AM

3

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:13 AM

4

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:13 AM

2

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:33 AM

33

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:37 AM

69

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:00:45 AM

29

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:00:45 AM

38

1260.00

TQEX

71


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:00:45 AM

18

1260.00

AQEU

GENMAB A/S

08-Apr-2025

11:00:45 AM

8

1260.00

AQEU

GENMAB A/S

08-Apr-2025

11:00:45 AM

17

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:00:58 AM

33

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:00:58 AM

13

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:00:58 AM

47

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:00:59 AM

2

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:00:59 AM

85

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:02:18 AM

39

1259.00

TQEX

GENMAB A/S

08-Apr-2025

11:02:18 AM

24

1259.00

AQEU

GENMAB A/S

08-Apr-2025

11:02:18 AM

1

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:02:18 AM

86

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:02:32 AM

88

1258.50

XCSE

GENMAB A/S

08-Apr-2025

11:04:02 AM

24

1259.50

TQEX

GENMAB A/S

08-Apr-2025

11:04:02 AM

24

1259.50

AQEU

GENMAB A/S

08-Apr-2025

11:04:15 AM

15

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:04:15 AM

72

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:04:15 AM

89

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:05:36 AM

5

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:05:36 AM

3

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:05:36 AM

1

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:05:36 AM

12

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:06:42 AM

10

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:07:34 AM

45

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:08:51 AM

7

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:09:09 AM

46

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:09:09 AM

40

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:09:09 AM

27

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:09:09 AM

14

1260.00

TQEX

GENMAB A/S

08-Apr-2025

11:09:09 AM

24

1260.00

TQEX

GENMAB A/S

08-Apr-2025

11:09:09 AM

46

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:09:09 AM

36

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:10:06 AM

24

1260.00

AQEU

GENMAB A/S

08-Apr-2025

11:10:51 AM

34

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:08 AM

32

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:08 AM

30

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:08 AM

13

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:08 AM

38

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:12 AM

29

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:12 AM

30

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:12 AM

39

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:12 AM

15

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:23 AM

30

1260.00

XCSE

72


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:11:23 AM

31

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:41 AM

35

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:11:41 AM

1

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:11:44 AM

80

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:11:44 AM

30

1259.00

TQEX

GENMAB A/S

08-Apr-2025

11:11:44 AM

40

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:11:44 AM

8

1259.00

CEUX

GENMAB A/S

08-Apr-2025

11:11:57 AM

34

1258.50

AQEU

GENMAB A/S

08-Apr-2025

11:12:28 AM

13

1258.00

TQEX

GENMAB A/S

08-Apr-2025

11:12:28 AM

32

1258.00

CEUX

GENMAB A/S

08-Apr-2025

11:12:28 AM

57

1258.00

CEUX

GENMAB A/S

08-Apr-2025

11:12:30 AM

1

1258.00

TQEX

GENMAB A/S

08-Apr-2025

11:12:30 AM

1

1258.00

TQEX

GENMAB A/S

08-Apr-2025

11:12:31 AM

20

1258.00

TQEX

GENMAB A/S

08-Apr-2025

11:12:34 AM

87

1257.50

XCSE

GENMAB A/S

08-Apr-2025

11:13:58 AM

35

1258.50

XCSE

GENMAB A/S

08-Apr-2025

11:13:58 AM

15

1258.50

XCSE

GENMAB A/S

08-Apr-2025

11:15:01 AM

83

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:15:01 AM

24

1260.00

AQEU

GENMAB A/S

08-Apr-2025

11:15:07 AM

50

1259.50

TQEX

GENMAB A/S

08-Apr-2025

11:15:12 AM

86

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:15:14 AM

24

1259.00

AQEU

GENMAB A/S

08-Apr-2025

11:18:08 AM

45

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:18:11 AM

35

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:18:11 AM

65

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:19:08 AM

45

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:19:14 AM

36

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:19:14 AM

20

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

7

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

5

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

6

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

3

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

36

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:25 AM

56

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:34 AM

29

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:19:51 AM

45

1260.50

TQEX

GENMAB A/S

08-Apr-2025

11:19:51 AM

12

1260.50

AQEU

GENMAB A/S

08-Apr-2025

11:19:51 AM

12

1260.50

AQEU

GENMAB A/S

08-Apr-2025

11:20:33 AM

43

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:20:38 AM

41

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:21:24 AM

74

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

16

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

39

1260.50

XCSE

73


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:21:24 AM

13

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

28

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

30

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

3

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:21:24 AM

31

1260.50

TQEX

GENMAB A/S

08-Apr-2025

11:21:24 AM

24

1260.50

AQEU

GENMAB A/S

08-Apr-2025

11:21:36 AM

87

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:21:58 AM

17

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:21:58 AM

15

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:24:38 AM

87

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:24:38 AM

44

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:24:38 AM

66

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:24:38 AM

3

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:24:38 AM

24

1260.00

AQEU

GENMAB A/S

08-Apr-2025

11:24:38 AM

83

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:24:42 AM

27

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:25:10 AM

59

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:25:14 AM

5

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:25:14 AM

80

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:25:14 AM

26

1260.50

TQEX

GENMAB A/S

08-Apr-2025

11:25:18 AM

83

1260.00

CEUX

GENMAB A/S

08-Apr-2025

11:25:47 AM

82

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:25:47 AM

2

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:25:47 AM

37

1259.50

TQEX

GENMAB A/S

08-Apr-2025

11:25:59 AM

1

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:26:00 AM

65

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:27:45 AM

36

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:27:45 AM

1

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:27:45 AM

39

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:27:45 AM

37

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:28:18 AM

35

1258.50

CEUX

GENMAB A/S

08-Apr-2025

11:28:38 AM

4

1259.00

XCSE

GENMAB A/S

08-Apr-2025

11:32:00 AM

79

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:32:00 AM

9

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:32:38 AM

36

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:32:40 AM

51

1261.00

CEUX

GENMAB A/S

08-Apr-2025

11:32:43 AM

30

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:32:43 AM

14

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:32:43 AM

39

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:00 AM

29

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:00 AM

39

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:00 AM

16

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:00 AM

29

1261.00

XCSE

74


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:33:00 AM

28

1260.50

TQEX

GENMAB A/S

08-Apr-2025

11:33:01 AM

13

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:01 AM

16

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:01 AM

39

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:33:01 AM

39

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:35:11 AM

39

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:35:11 AM

35

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:35:45 AM

85

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:35:50 AM

8

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:36:00 AM

20

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:00 AM

39

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:00 AM

27

1260.50

TQEX

GENMAB A/S

08-Apr-2025

11:36:00 AM

39

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:36:04 AM

54

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

29

1259.50

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

39

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

39

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

14

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

13

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:36:04 AM

18

1259.50

TQEX

GENMAB A/S

08-Apr-2025

11:36:04 AM

1

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:36:04 AM

3

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:36:04 AM

1

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:36:04 AM

81

1259.50

CEUX

GENMAB A/S

08-Apr-2025

11:38:29 AM

39

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:38:29 AM

30

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:38:29 AM

1

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:38:38 AM

59

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:39:28 AM

3

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:39:28 AM

4

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:39:28 AM

3

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:39:28 AM

3

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:39:28 AM

33

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:44:36 AM

26

1261.00

TQEX

GENMAB A/S

08-Apr-2025

11:44:36 AM

28

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:44:36 AM

5

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:44:36 AM

2

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:44:36 AM

27

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:44:40 AM

3

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:44:45 AM

83

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:44:45 AM

15

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:44:45 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:44:45 AM

16

1261.50

XCSE

75


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:44:45 AM

15

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:45:00 AM

15

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:45:00 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:45:00 AM

13

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:45:30 AM

13

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:00 AM

14

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:24 AM

13

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:24 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:24 AM

1

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:24 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:26 AM

12

1261.50

CEUX

GENMAB A/S

08-Apr-2025

11:46:26 AM

28

1261.50

CEUX

GENMAB A/S

08-Apr-2025

11:46:29 AM

14

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:29 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:29 AM

39

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:30 AM

15

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:30 AM

33

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:46:48 AM

87

1261.00

XCSE

GENMAB A/S

08-Apr-2025

11:46:48 AM

28

1261.00

TQEX

GENMAB A/S

08-Apr-2025

11:46:49 AM

3

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:46:49 AM

7

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:47:57 AM

24

1260.50

AQEU

GENMAB A/S

08-Apr-2025

11:47:57 AM

74

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:48:28 AM

31

1260.00

XCSE

GENMAB A/S

08-Apr-2025

11:48:28 AM

25

1260.00

TQEX

GENMAB A/S

08-Apr-2025

11:50:34 AM

3

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:50:34 AM

58

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:50:34 AM

23

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:50:34 AM

14

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:50:34 AM

25

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:50:34 AM

85

1260.50

CEUX

GENMAB A/S

08-Apr-2025

11:52:15 AM

16

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:52:26 AM

71

1260.50

XCSE

GENMAB A/S

08-Apr-2025

11:53:03 AM

7

1264.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:03 AM

89

1264.00

CEUX

GENMAB A/S

08-Apr-2025

11:53:04 AM

27

1264.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:04 AM

29

1264.00

AQEU

GENMAB A/S

08-Apr-2025

11:53:08 AM

54

1264.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:08 AM

30

1264.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:08 AM

15

1264.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:34 AM

25

1263.50

TQEX

GENMAB A/S

08-Apr-2025

11:53:43 AM

62

1263.00

XCSE

GENMAB A/S

08-Apr-2025

11:53:43 AM

28

1263.00

XCSE

76


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

11:53:43 AM

84

1263.00

CEUX

GENMAB A/S

08-Apr-2025

11:53:49 AM

27

1262.50

TQEX

GENMAB A/S

08-Apr-2025

11:53:49 AM

39

1262.50

AQEU

GENMAB A/S

08-Apr-2025

11:53:54 AM

55

1262.00

CEUX

GENMAB A/S

08-Apr-2025

11:53:54 AM

34

1262.00

CEUX

GENMAB A/S

08-Apr-2025

11:54:01 AM

89

1263.50

XCSE

GENMAB A/S

08-Apr-2025

11:54:01 AM

32

1263.50

AQEU

GENMAB A/S

08-Apr-2025

11:54:14 AM

90

1262.50

XCSE

GENMAB A/S

08-Apr-2025

11:54:14 AM

86

1262.50

CEUX

GENMAB A/S

08-Apr-2025

11:54:17 AM

62

1262.50

CEUX

GENMAB A/S

08-Apr-2025

11:55:25 AM

84

1261.50

XCSE

GENMAB A/S

08-Apr-2025

11:55:25 AM

6

1261.50

CEUX

GENMAB A/S

08-Apr-2025

11:55:25 AM

76

1261.50

CEUX

GENMAB A/S

08-Apr-2025

11:58:00 AM

85

1263.50

XCSE

GENMAB A/S

08-Apr-2025

11:58:00 AM

33

1263.50

AQEU

GENMAB A/S

08-Apr-2025

11:58:00 AM

7

1263.00

CEUX

GENMAB A/S

08-Apr-2025

11:58:00 AM

2

1263.00

CEUX

GENMAB A/S

08-Apr-2025

11:58:03 AM

44

1263.00

CEUX

GENMAB A/S

08-Apr-2025

11:58:09 AM

4

1262.50

XCSE

GENMAB A/S

08-Apr-2025

11:58:09 AM

1

1262.50

XCSE

GENMAB A/S

08-Apr-2025

11:58:26 AM

3

1262.50

XCSE

GENMAB A/S

08-Apr-2025

11:58:33 AM

75

1262.50

XCSE

GENMAB A/S

08-Apr-2025

12:00:04 PM

54

1262.00

CEUX

GENMAB A/S

08-Apr-2025

12:00:22 PM

71

1261.50

XCSE

GENMAB A/S

08-Apr-2025

12:01:01 PM

33

1261.50

XCSE

GENMAB A/S

08-Apr-2025

12:01:01 PM

54

1261.50

XCSE

GENMAB A/S

08-Apr-2025

12:01:01 PM

35

1261.50

TQEX

GENMAB A/S

08-Apr-2025

12:01:01 PM

7

1261.50

CEUX

GENMAB A/S

08-Apr-2025

12:01:01 PM

36

1261.50

CEUX

GENMAB A/S

08-Apr-2025

12:01:09 PM

90

1260.50

XCSE

GENMAB A/S

08-Apr-2025

12:02:46 PM

23

1261.50

CEUX

GENMAB A/S

08-Apr-2025

12:02:46 PM

32

1261.50

CEUX

GENMAB A/S

08-Apr-2025

12:05:46 PM

3

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:05:46 PM

6

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:05:46 PM

15

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:05:46 PM

39

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:05:46 PM

49

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:06:21 PM

22

1266.50

CEUX

GENMAB A/S

08-Apr-2025

12:06:21 PM

52

1266.50

CEUX

GENMAB A/S

08-Apr-2025

12:08:08 PM

31

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:14 PM

43

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:14 PM

43

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:14 PM

27

1267.00

XCSE

77


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

12:10:14 PM

13

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:14 PM

64

1266.50

CEUX

GENMAB A/S

08-Apr-2025

12:10:18 PM

13

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:18 PM

16

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:19 PM

13

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:20 PM

15

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:20 PM

14

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:22 PM

13

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:22 PM

23

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:48 PM

39

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:48 PM

39

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:48 PM

32

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:10:48 PM

3

1267.00

XCSE

GENMAB A/S

08-Apr-2025

12:11:40 PM

19

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:11:40 PM

6

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:12:13 PM

67

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:12:13 PM

19

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:12:13 PM

4

1265.50

CEUX

GENMAB A/S

08-Apr-2025

12:12:13 PM

67

1265.50

CEUX

GENMAB A/S

08-Apr-2025

12:12:19 PM

84

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:12:19 PM

25

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:12:28 PM

20

1265.50

AQEU

GENMAB A/S

08-Apr-2025

12:13:05 PM

83

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:13:05 PM

32

1265.00

TQEX

GENMAB A/S

08-Apr-2025

12:13:05 PM

6

1265.50

AQEU

GENMAB A/S

08-Apr-2025

12:13:05 PM

26

1265.50

CEUX

GENMAB A/S

08-Apr-2025

12:13:05 PM

49

1265.50

CEUX

GENMAB A/S

08-Apr-2025

12:13:07 PM

37

1264.50

CEUX

GENMAB A/S

08-Apr-2025

12:14:26 PM

23

1264.50

CEUX

GENMAB A/S

08-Apr-2025

12:14:31 PM

36

1264.00

XCSE

GENMAB A/S

08-Apr-2025

12:14:31 PM

50

1264.00

XCSE

GENMAB A/S

08-Apr-2025

12:14:49 PM

12

1263.50

AQEU

GENMAB A/S

08-Apr-2025

12:15:06 PM

15

1263.50

AQEU

GENMAB A/S

08-Apr-2025

12:15:22 PM

4

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:15:30 PM

80

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:16:23 PM

24

1263.50

AQEU

GENMAB A/S

08-Apr-2025

12:18:43 PM

3

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:22:31 PM

31

1268.50

XCSE

GENMAB A/S

08-Apr-2025

12:22:31 PM

4

1268.50

XCSE

GENMAB A/S

08-Apr-2025

12:22:31 PM

26

1268.50

XCSE

GENMAB A/S

08-Apr-2025

12:22:31 PM

27

1268.50

XCSE

GENMAB A/S

08-Apr-2025

12:22:31 PM

86

1268.00

CEUX

GENMAB A/S

08-Apr-2025

12:22:34 PM

1

1269.00

XCSE

78


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

12:22:34 PM

38

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

15

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

16

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

39

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

4

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

22

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

60

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:22:34 PM

31

1269.00

XCSE

GENMAB A/S

08-Apr-2025

12:23:46 PM

84

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:24:10 PM

11

1267.00

TQEX

GENMAB A/S

08-Apr-2025

12:24:10 PM

22

1267.00

TQEX

GENMAB A/S

08-Apr-2025

12:24:10 PM

36

1267.00

AQEU

GENMAB A/S

08-Apr-2025

12:24:10 PM

89

1267.00

CEUX

GENMAB A/S

08-Apr-2025

12:25:47 PM

72

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:25:47 PM

14

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:26:28 PM

1

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:26:30 PM

28

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:26:58 PM

4

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

21

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

4

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

3

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

37

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

19

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

1

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:43 PM

28

1268.00

XCSE

GENMAB A/S

08-Apr-2025

12:28:52 PM

89

1267.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:52 PM

83

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:52 PM

24

1267.00

TQEX

GENMAB A/S

08-Apr-2025

12:28:52 PM

32

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:28:52 PM

34

1267.00

AQEU

GENMAB A/S

08-Apr-2025

12:28:52 PM

86

1267.00

CEUX

GENMAB A/S

08-Apr-2025

12:28:52 PM

46

1266.00

CEUX

GENMAB A/S

08-Apr-2025

12:28:52 PM

10

1266.00

CEUX

GENMAB A/S

08-Apr-2025

12:28:52 PM

34

1266.00

CEUX

GENMAB A/S

08-Apr-2025

12:28:53 PM

50

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:53 PM

35

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:53 PM

61

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:28:53 PM

38

1265.50

AQEU

GENMAB A/S

08-Apr-2025

12:28:53 PM

77

1265.50

CEUX

GENMAB A/S

08-Apr-2025

12:29:51 PM

22

1264.50

CEUX

GENMAB A/S

08-Apr-2025

12:30:38 PM

46

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:30:38 PM

36

1264.50

CEUX

GENMAB A/S

08-Apr-2025

12:30:38 PM

29

1264.50

CEUX

79


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

12:31:21 PM

8

1265.00

AQEU

GENMAB A/S

08-Apr-2025

12:31:46 PM

17

1265.00

AQEU

GENMAB A/S

08-Apr-2025

12:31:46 PM

11

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:31:46 PM

13

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:32:20 PM

40

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:32:30 PM

1

1264.00

TQEX

GENMAB A/S

08-Apr-2025

12:32:30 PM

1

1264.00

TQEX

GENMAB A/S

08-Apr-2025

12:32:30 PM

24

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:32:35 PM

30

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:32:35 PM

53

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:34:30 PM

17

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:34:30 PM

7

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:35:01 PM

25

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:35:01 PM

39

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:35:10 PM

31

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:35:10 PM

1

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:35:12 PM

16

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:38:37 PM

1

1264.00

TQEX

GENMAB A/S

08-Apr-2025

12:38:37 PM

33

1264.00

TQEX

GENMAB A/S

08-Apr-2025

12:38:37 PM

25

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:41:11 PM

29

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:41:45 PM

2

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:41:45 PM

3

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:42:03 PM

1

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:42:03 PM

54

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:42:03 PM

18

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:42:03 PM

30

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:43:13 PM

8

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:44:45 PM

87

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:44:45 PM

69

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:44:45 PM

42

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:44:45 PM

2

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:44:45 PM

21

1265.00

TQEX

GENMAB A/S

08-Apr-2025

12:44:45 PM

12

1265.00

TQEX

GENMAB A/S

08-Apr-2025

12:44:45 PM

24

1265.00

AQEU

GENMAB A/S

08-Apr-2025

12:44:45 PM

87

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:45:01 PM

44

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:45:17 PM

15

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:45:17 PM

22

1265.00

XCSE

GENMAB A/S

08-Apr-2025

12:45:17 PM

35

1264.50

TQEX

GENMAB A/S

08-Apr-2025

12:45:29 PM

11

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:45:29 PM

72

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:46:01 PM

34

1264.00

CEUX

80


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

12:46:30 PM

11

1264.00

AQEU

GENMAB A/S

08-Apr-2025

12:48:16 PM

13

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:48:52 PM

15

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:48:52 PM

63

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:48:52 PM

1

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:48:52 PM

15

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:48:52 PM

16

1266.00

XCSE

GENMAB A/S

08-Apr-2025

12:50:01 PM

88

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:50:01 PM

42

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:50:01 PM

15

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:50:01 PM

4

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:50:03 PM

24

1265.00

AQEU

GENMAB A/S

08-Apr-2025

12:50:03 PM

85

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:50:20 PM

83

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:50:26 PM

34

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:50:26 PM

4

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:50:31 PM

11

1264.00

AQEU

GENMAB A/S

08-Apr-2025

12:50:35 PM

2

1264.00

AQEU

GENMAB A/S

08-Apr-2025

12:51:10 PM

37

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:51:10 PM

37

1263.50

XCSE

GENMAB A/S

08-Apr-2025

12:51:35 PM

11

1263.50

AQEU

GENMAB A/S

08-Apr-2025

12:51:58 PM

14

1263.50

AQEU

GENMAB A/S

08-Apr-2025

12:52:57 PM

84

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:53:02 PM

8

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:53:02 PM

8

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:53:02 PM

74

1264.00

CEUX

GENMAB A/S

08-Apr-2025

12:56:50 PM

27

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:56:51 PM

42

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:57:04 PM

42

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:57:04 PM

30

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:57:46 PM

10

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:57:46 PM

14

1266.00

TQEX

GENMAB A/S

08-Apr-2025

12:57:46 PM

43

1266.00

CEUX

GENMAB A/S

08-Apr-2025

12:57:46 PM

46

1266.00

CEUX

GENMAB A/S

08-Apr-2025

12:58:06 PM

9

1266.50

CEUX

GENMAB A/S

08-Apr-2025

12:58:50 PM

85

1266.50

XCSE

GENMAB A/S

08-Apr-2025

12:58:50 PM

24

1266.50

TQEX

GENMAB A/S

08-Apr-2025

12:58:50 PM

74

1266.50

CEUX

GENMAB A/S

08-Apr-2025

12:59:00 PM

30

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:59:00 PM

57

1265.50

XCSE

GENMAB A/S

08-Apr-2025

12:59:16 PM

27

1265.00

AQEU

GENMAB A/S

08-Apr-2025

12:59:16 PM

86

1265.00

CEUX

GENMAB A/S

08-Apr-2025

12:59:43 PM

10

1264.50

XCSE

81


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

12:59:43 PM

1

1264.50

XCSE

GENMAB A/S

08-Apr-2025

12:59:43 PM

77

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:01:20 PM

36

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:02:10 PM

6

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:02:31 PM

42

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:02:31 PM

31

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:03:51 PM

48

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:03:51 PM

23

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:04:28 PM

42

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:04:28 PM

22

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:05:06 PM

34

1264.00

XCSE

GENMAB A/S

08-Apr-2025

13:05:06 PM

49

1264.00

XCSE

GENMAB A/S

08-Apr-2025

13:05:06 PM

3

1264.00

TQEX

GENMAB A/S

08-Apr-2025

13:05:06 PM

21

1264.00

TQEX

GENMAB A/S

08-Apr-2025

13:05:06 PM

89

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:05:18 PM

26

1263.00

CEUX

GENMAB A/S

08-Apr-2025

13:05:24 PM

87

1263.00

XCSE

GENMAB A/S

08-Apr-2025

13:05:25 PM

27

1263.00

TQEX

GENMAB A/S

08-Apr-2025

13:05:25 PM

60

1263.00

CEUX

GENMAB A/S

08-Apr-2025

13:09:43 PM

42

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:09:43 PM

32

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:09:43 PM

39

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:09:58 PM

26

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:09:58 PM

12

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:10:03 PM

24

1265.00

TQEX

GENMAB A/S

08-Apr-2025

13:10:03 PM

24

1265.00

AQEU

GENMAB A/S

08-Apr-2025

13:10:03 PM

83

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:11:22 PM

27

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:11:22 PM

3

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:11:22 PM

39

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:11:22 PM

16

1265.50

XCSE

GENMAB A/S

08-Apr-2025

13:11:25 PM

72

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:11:39 PM

2

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:11:39 PM

1

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:11:39 PM

83

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:11:39 PM

1

1265.00

AQEU

GENMAB A/S

08-Apr-2025

13:11:39 PM

18

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:11:41 PM

24

1265.00

AQEU

GENMAB A/S

08-Apr-2025

13:11:51 PM

89

1264.00

XCSE

GENMAB A/S

08-Apr-2025

13:11:51 PM

36

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:11:51 PM

26

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:12:57 PM

25

1265.00

AQEU

GENMAB A/S

08-Apr-2025

13:12:57 PM

23

1265.00

CEUX

82


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

13:12:57 PM

9

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:13:03 PM

24

1265.00

TQEX

GENMAB A/S

08-Apr-2025

13:13:03 PM

20

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:13:25 PM

85

1264.00

XCSE

GENMAB A/S

08-Apr-2025

13:13:25 PM

10

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:13:25 PM

48

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:14:46 PM

39

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:14:55 PM

29

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:15:08 PM

26

1264.50

AQEU

GENMAB A/S

08-Apr-2025

13:15:11 PM

87

1264.00

XCSE

GENMAB A/S

08-Apr-2025

13:15:11 PM

26

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:17:39 PM

28

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:17:39 PM

5

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:17:39 PM

28

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:17:39 PM

7

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:17:39 PM

8

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:18:21 PM

31

1266.50

CEUX

GENMAB A/S

08-Apr-2025

13:18:49 PM

24

1267.50

TQEX

GENMAB A/S

08-Apr-2025

13:19:52 PM

40

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:19:52 PM

48

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:19:52 PM

24

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:19:52 PM

21

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:20:15 PM

17

1266.50

CEUX

GENMAB A/S

08-Apr-2025

13:20:44 PM

63

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:22:58 PM

16

1266.00

AQEU

GENMAB A/S

08-Apr-2025

13:23:45 PM

65

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:23:45 PM

16

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:23:45 PM

7

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:23:45 PM

25

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:24:00 PM

64

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:24:00 PM

28

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:24:38 PM

57

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:24:57 PM

3

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:24:57 PM

1

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:24:58 PM

10

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:24:58 PM

9

1266.00

AQEU

GENMAB A/S

08-Apr-2025

13:25:14 PM

89

1265.00

XCSE

GENMAB A/S

08-Apr-2025

13:25:14 PM

24

1265.00

TQEX

GENMAB A/S

08-Apr-2025

13:25:14 PM

41

1265.00

CEUX

GENMAB A/S

08-Apr-2025

13:26:41 PM

26

1264.00

CEUX

GENMAB A/S

08-Apr-2025

13:27:08 PM

3

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:27:08 PM

4

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:27:08 PM

42

1264.50

XCSE

83


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

13:27:08 PM

28

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:28:18 PM

10

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:28:39 PM

33

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:28:58 PM

39

1264.50

XCSE

GENMAB A/S

08-Apr-2025

13:30:26 PM

24

1264.00

TQEX

GENMAB A/S

08-Apr-2025

13:30:32 PM

9

1263.50

XCSE

GENMAB A/S

08-Apr-2025

13:30:32 PM

77

1263.50

XCSE

GENMAB A/S

08-Apr-2025

13:32:15 PM

52

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:15 PM

25

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:15 PM

3

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:15 PM

4

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:15 PM

29

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:34 PM

2

1266.00

CEUX

GENMAB A/S

08-Apr-2025

13:32:34 PM

35

1266.00

CEUX

GENMAB A/S

08-Apr-2025

13:32:51 PM

24

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:58 PM

43

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:58 PM

15

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:32:58 PM

23

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:34:08 PM

34

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:34:08 PM

2

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:34:24 PM

1

1266.00

CEUX

GENMAB A/S

08-Apr-2025

13:34:24 PM

32

1266.00

CEUX

GENMAB A/S

08-Apr-2025

13:34:48 PM

1

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:34:48 PM

4

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:34:48 PM

4

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:35:15 PM

8

1266.00

AQEU

GENMAB A/S

08-Apr-2025

13:35:37 PM

1

1266.50

TQEX

GENMAB A/S

08-Apr-2025

13:35:37 PM

6

1266.50

TQEX

GENMAB A/S

08-Apr-2025

13:35:37 PM

22

1266.50

TQEX

GENMAB A/S

08-Apr-2025

13:35:43 PM

10

1266.00

XCSE

GENMAB A/S

08-Apr-2025

13:36:31 PM

36

1266.50

CEUX

GENMAB A/S

08-Apr-2025

13:37:12 PM

6

1267.00

CEUX

GENMAB A/S

08-Apr-2025

13:37:12 PM

31

1267.00

CEUX

GENMAB A/S

08-Apr-2025

13:37:16 PM

8

1267.50

XCSE

GENMAB A/S

08-Apr-2025

13:37:22 PM

24

1267.50

CEUX

GENMAB A/S

08-Apr-2025

13:37:22 PM

20

1267.50

CEUX

GENMAB A/S

08-Apr-2025

13:38:20 PM

37

1267.50

XCSE

GENMAB A/S

08-Apr-2025

13:38:20 PM

7

1267.50

TQEX

GENMAB A/S

08-Apr-2025

13:38:20 PM

25

1267.50

TQEX

GENMAB A/S

08-Apr-2025

13:38:28 PM

32

1267.50

CEUX

GENMAB A/S

08-Apr-2025

13:38:31 PM

1

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

82

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

25

1267.00

XCSE

84


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

13:38:31 PM

25

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

42

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

16

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

5

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:38:31 PM

28

1267.00

AQEU

GENMAB A/S

08-Apr-2025

13:38:31 PM

88

1267.00

CEUX

GENMAB A/S

08-Apr-2025

13:38:42 PM

30

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:39:08 PM

29

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:39:28 PM

4

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:39:41 PM

23

1266.00

CEUX

GENMAB A/S

08-Apr-2025

13:40:05 PM

14

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:40:05 PM

25

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:40:05 PM

42

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:40:42 PM

26

1266.50

TQEX

GENMAB A/S

08-Apr-2025

13:41:08 PM

42

1267.00

XCSE

GENMAB A/S

08-Apr-2025

13:41:24 PM

24

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:41:38 PM

45

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:42:18 PM

4

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:42:18 PM

9

1266.50

XCSE

GENMAB A/S

08-Apr-2025

13:43:14 PM

83

1269.00

XCSE

GENMAB A/S

08-Apr-2025

13:43:14 PM

25

1269.00

TQEX

GENMAB A/S

08-Apr-2025

13:43:14 PM

43

1269.00

CEUX

GENMAB A/S

08-Apr-2025

13:43:14 PM

41

1269.00

CEUX

GENMAB A/S

08-Apr-2025

13:43:41 PM

33

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:44:19 PM

40

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:44:19 PM

43

1270.00

AQEU

GENMAB A/S

08-Apr-2025

13:44:38 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:44:38 PM

7

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:45:16 PM

88

1269.50

XCSE

GENMAB A/S

08-Apr-2025

13:45:16 PM

32

1270.00

CEUX

GENMAB A/S

08-Apr-2025

13:45:46 PM

36

1270.00

CEUX

GENMAB A/S

08-Apr-2025

13:45:46 PM

35

1270.00

CEUX

GENMAB A/S

08-Apr-2025

13:45:47 PM

24

1269.50

AQEU

GENMAB A/S

08-Apr-2025

13:45:47 PM

85

1269.50

CEUX

GENMAB A/S

08-Apr-2025

13:47:12 PM

86

1269.00

XCSE

GENMAB A/S

08-Apr-2025

13:47:12 PM

24

1269.00

TQEX

GENMAB A/S

08-Apr-2025

13:47:12 PM

25

1269.00

AQEU

GENMAB A/S

08-Apr-2025

13:47:12 PM

38

1269.00

CEUX

GENMAB A/S

08-Apr-2025

13:47:12 PM

46

1269.00

CEUX

GENMAB A/S

08-Apr-2025

13:47:14 PM

24

1269.00

AQEU

GENMAB A/S

08-Apr-2025

13:48:12 PM

90

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:48:12 PM

30

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:48:12 PM

42

1270.00

XCSE

85


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

13:48:12 PM

29

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:48:12 PM

78

1270.00

AQEU

GENMAB A/S

08-Apr-2025

13:48:12 PM

83

1270.00

CEUX

GENMAB A/S

08-Apr-2025

13:49:52 PM

24

1271.00

TQEX

GENMAB A/S

08-Apr-2025

13:49:53 PM

9

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:49:53 PM

85

1270.50

CEUX

GENMAB A/S

08-Apr-2025

13:49:59 PM

6

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:49:59 PM

6

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:50:02 PM

2

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:50:02 PM

2

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:50:02 PM

1

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:50:08 PM

62

1270.50

XCSE

GENMAB A/S

08-Apr-2025

13:50:08 PM

37

1270.50

AQEU

GENMAB A/S

08-Apr-2025

13:52:30 PM

22

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:52:30 PM

11

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:52:30 PM

9

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

83

1269.00

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

42

1269.50

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

7

1269.50

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

27

1269.50

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

37

1269.50

XCSE

GENMAB A/S

08-Apr-2025

13:53:47 PM

30

1269.50

TQEX

GENMAB A/S

08-Apr-2025

13:53:47 PM

14

1269.50

TQEX

GENMAB A/S

08-Apr-2025

13:53:47 PM

37

1269.00

CEUX

GENMAB A/S

08-Apr-2025

13:54:40 PM

10

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:54:40 PM

25

1270.00

AQEU

GENMAB A/S

08-Apr-2025

13:54:40 PM

88

1270.00

CEUX

GENMAB A/S

08-Apr-2025

13:56:07 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:56:07 PM

6

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:56:07 PM

30

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:56:07 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

13:59:19 PM

23

1270.00

AQEU

GENMAB A/S

08-Apr-2025

13:59:19 PM

14

1270.00

AQEU

GENMAB A/S

08-Apr-2025

13:59:19 PM

90

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:00:29 PM

3

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:00:29 PM

7

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:00:45 PM

3

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:00:56 PM

2

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:01:23 PM

49

1271.00

AQEU

GENMAB A/S

08-Apr-2025

14:01:23 PM

12

1271.00

AQEU

GENMAB A/S

08-Apr-2025

14:01:23 PM

32

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:01:24 PM

42

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:24 PM

39

1271.00

XCSE

86


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:01:24 PM

90

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:24 PM

24

1270.50

TQEX

GENMAB A/S

08-Apr-2025

14:01:24 PM

88

1270.50

CEUX

GENMAB A/S

08-Apr-2025

14:01:25 PM

85

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

28

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

19

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

24

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

42

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

28

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

46

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

14

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

16

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:25 PM

37

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:26 PM

14

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:26 PM

13

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:26 PM

13

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:26 PM

16

1270.50

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

27

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:01:30 PM

10

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:04:15 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:18 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:19 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:20 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:21 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:25 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:04:26 PM

16

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:05:06 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:05:06 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:05:06 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:05:06 PM

87

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:05:06 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:05:50 PM

13

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:06:10 PM

3

1270.50

CEUX

GENMAB A/S

08-Apr-2025

14:06:41 PM

4

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:09:25 PM

24

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:09:25 PM

33

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:09:29 PM

79

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:09:29 PM

24

1271.00

TQEX

GENMAB A/S

08-Apr-2025

14:09:29 PM

33

1271.00

CEUX

87


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:09:29 PM

41

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:09:29 PM

7

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:09:29 PM

9

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:03 PM

87

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:03 PM

11

1271.00

TQEX

GENMAB A/S

08-Apr-2025

14:12:04 PM

39

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:04 PM

6

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:20 PM

3

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

1

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

79

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

9

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:20 PM

15

1271.00

TQEX

GENMAB A/S

08-Apr-2025

14:12:20 PM

1

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:20 PM

38

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:20 PM

8

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:20 PM

7

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:35 PM

26

1271.00

TQEX

GENMAB A/S

08-Apr-2025

14:12:35 PM

41

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:35 PM

9

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:35 PM

7

1271.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:43 PM

42

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:43 PM

16

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

30

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

42

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

15

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

42

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:57 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

30

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

42

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

85

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

83

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

4

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:12:58 PM

26

1270.00

TQEX

GENMAB A/S

08-Apr-2025

14:12:58 PM

41

1270.50

CEUX

GENMAB A/S

08-Apr-2025

14:12:58 PM

25

1270.50

CEUX

88


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:12:58 PM

73

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:12:58 PM

4

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:12:58 PM

1

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:12:58 PM

21

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:14:39 PM

14

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:17:11 PM

57

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:17:45 PM

27

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:17:45 PM

1

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:17:45 PM

31

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:17:45 PM

53

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:17:45 PM

40

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:17:45 PM

41

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:17:45 PM

68

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:18:06 PM

19

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:19:33 PM

44

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:20:30 PM

40

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:21:15 PM

60

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:15 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:15 PM

88

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:21:16 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:16 PM

16

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:16 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:16 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:17 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:17 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:17 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:18 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:18 PM

42

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:18 PM

2

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:18 PM

28

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:18 PM

28

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:20 PM

16

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:23 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:23 PM

1

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:34 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

85

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

30

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

16

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

18

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

16

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

33

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:45 PM

85

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:21:45 PM

83

1270.00

CEUX

89


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:21:45 PM

51

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:21:47 PM

3

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:47 PM

5

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:47 PM

1

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:21:47 PM

25

1269.50

TQEX

GENMAB A/S

08-Apr-2025

14:21:48 PM

80

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:08 PM

3

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:15 PM

82

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:15 PM

83

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:23:30 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:48 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:48 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:23:48 PM

34

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

60

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

20

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

2

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

14:25:14 PM

86

1270.00

CEUX

GENMAB A/S

08-Apr-2025

14:25:14 PM

1

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:25:14 PM

4

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:25:14 PM

1

1270.00

AQEU

GENMAB A/S

08-Apr-2025

14:28:23 PM

100

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:28:23 PM

13

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:29:44 PM

53

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:29:44 PM

19

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:29:44 PM

17

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:29:44 PM

85

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:29:44 PM

20

1274.50

TQEX

GENMAB A/S

08-Apr-2025

14:29:44 PM

21

1274.50

TQEX

GENMAB A/S

08-Apr-2025

14:29:44 PM

41

1273.50

TQEX

GENMAB A/S

08-Apr-2025

14:29:44 PM

85

1275.00

CEUX

GENMAB A/S

08-Apr-2025

14:29:44 PM

70

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:29:44 PM

72

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:29:44 PM

11

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:29:44 PM

51

1274.50

AQEU

GENMAB A/S

08-Apr-2025

14:29:44 PM

53

1273.00

AQEU

GENMAB A/S

08-Apr-2025

14:29:54 PM

3

1273.00

XCSE

GENMAB A/S

08-Apr-2025

14:30:35 PM

2

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:32:57 PM

88

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:32:57 PM

52

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:32:57 PM

53

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:32:57 PM

8

1275.00

XCSE

90


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:32:57 PM

88

1275.00

CEUX

GENMAB A/S

08-Apr-2025

14:34:30 PM

55

1276.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

4

1276.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

4

1276.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

50

1276.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

87

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

3

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

24

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

53

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

3

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:30 PM

4

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:34:33 PM

87

1275.00

CEUX

GENMAB A/S

08-Apr-2025

14:34:33 PM

32

1275.00

AQEU

GENMAB A/S

08-Apr-2025

14:34:38 PM

15

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:38 PM

53

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:34:38 PM

7

1275.00

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

38

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

50

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

25

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

18

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

4

1275.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:29 PM

38

1275.50

TQEX

GENMAB A/S

08-Apr-2025

14:36:29 PM

84

1275.50

CEUX

GENMAB A/S

08-Apr-2025

14:36:29 PM

24

1275.50

AQEU

GENMAB A/S

08-Apr-2025

14:36:38 PM

83

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:38 PM

24

1274.50

TQEX

GENMAB A/S

08-Apr-2025

14:36:42 PM

80

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:36:42 PM

29

1274.00

AQEU

GENMAB A/S

08-Apr-2025

14:36:45 PM

89

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:36:45 PM

10

1273.50

TQEX

GENMAB A/S

08-Apr-2025

14:36:45 PM

15

1273.50

TQEX

GENMAB A/S

08-Apr-2025

14:36:49 PM

36

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:36:49 PM

16

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:36:50 PM

8

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:38:17 PM

87

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:39:58 PM

3

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:39:59 PM

16

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:39:59 PM

8

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:40:19 PM

13

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:40:19 PM

53

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:40:58 PM

2

1274.50

XCSE

91


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:40:58 PM

47

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:40:59 PM

25

1274.00

TQEX

GENMAB A/S

08-Apr-2025

14:40:59 PM

41

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:41:24 PM

85

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:41:24 PM

46

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:42:22 PM

85

1273.00

XCSE

GENMAB A/S

08-Apr-2025

14:42:22 PM

4

1273.00

TQEX

GENMAB A/S

08-Apr-2025

14:42:22 PM

1

1273.00

TQEX

GENMAB A/S

08-Apr-2025

14:42:22 PM

20

1273.00

TQEX

GENMAB A/S

08-Apr-2025

14:42:22 PM

29

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:42:22 PM

34

1273.00

AQEU

GENMAB A/S

08-Apr-2025

14:43:12 PM

90

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:43:12 PM

27

1273.50

AQEU

GENMAB A/S

08-Apr-2025

14:43:15 PM

84

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:43:20 PM

24

1272.50

TQEX

GENMAB A/S

08-Apr-2025

14:43:33 PM

83

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:43:33 PM

28

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:43:33 PM

49

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:45:48 PM

12

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:45:48 PM

2

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:45:55 PM

16

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:46:49 PM

83

1271.50

XCSE

GENMAB A/S

08-Apr-2025

14:46:49 PM

85

1271.50

CEUX

GENMAB A/S

08-Apr-2025

14:47:31 PM

71

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:47:31 PM

10

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:47:32 PM

3

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:48:34 PM

30

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:39 PM

16

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:39 PM

25

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:39 PM

40

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

11

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

25

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

56

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

12

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

4

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:48:40 PM

5

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:49:08 PM

9

1272.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

67

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

17

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

30

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

15

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

40

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

28

1274.00

XCSE

92


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:51:56 PM

83

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

30

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:51:56 PM

33

1273.50

TQEX

GENMAB A/S

08-Apr-2025

14:51:56 PM

26

1273.50

AQEU

GENMAB A/S

08-Apr-2025

14:52:38 PM

30

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:52:42 PM

14

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:52:48 PM

14

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:52:58 PM

1

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:52:58 PM

4

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:53:26 PM

18

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:53:43 PM

1

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:53:46 PM

18

1274.50

CEUX

GENMAB A/S

08-Apr-2025

14:54:42 PM

30

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:42 PM

25

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:42 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:42 PM

15

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:42 PM

24

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:42 PM

32

1274.50

CEUX

GENMAB A/S

08-Apr-2025

14:54:43 PM

24

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:43 PM

3

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:43 PM

11

1274.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:47 PM

27

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:54:47 PM

88

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:54:49 PM

88

1273.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:49 PM

28

1273.50

TQEX

GENMAB A/S

08-Apr-2025

14:54:49 PM

88

1273.00

CEUX

GENMAB A/S

08-Apr-2025

14:54:49 PM

24

1273.50

AQEU

GENMAB A/S

08-Apr-2025

14:54:50 PM

84

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:54:50 PM

33

1272.50

TQEX

GENMAB A/S

08-Apr-2025

14:54:50 PM

48

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:54:50 PM

25

1272.50

AQEU

GENMAB A/S

08-Apr-2025

14:54:51 PM

24

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:54:52 PM

11

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:55:25 PM

7

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:56:09 PM

52

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:56:09 PM

11

1272.00

CEUX

GENMAB A/S

08-Apr-2025

14:56:55 PM

3

1272.50

XCSE

GENMAB A/S

08-Apr-2025

14:58:19 PM

85

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:58:19 PM

87

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:59:58 PM

83

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:59:58 PM

50

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:59:58 PM

16

1274.00

XCSE

GENMAB A/S

08-Apr-2025

14:59:58 PM

15

1274.00

XCSE

93


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

14:59:58 PM

20

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:59:58 PM

3

1274.00

CEUX

GENMAB A/S

08-Apr-2025

14:59:58 PM

67

1274.00

CEUX

GENMAB A/S

08-Apr-2025

15:02:10 PM

28

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:02:10 PM

34

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:02:10 PM

30

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:02:10 PM

4

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

13

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

30

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

16

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

14

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:04:18 PM

5

1274.50

TQEX

GENMAB A/S

08-Apr-2025

15:04:18 PM

23

1274.50

TQEX

GENMAB A/S

08-Apr-2025

15:04:20 PM

7

1274.50

TQEX

GENMAB A/S

08-Apr-2025

15:06:09 PM

7

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:06:09 PM

8

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:06:09 PM

5

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:08:14 PM

36

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:08:46 PM

47

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:08:46 PM

16

1275.00

TQEX

GENMAB A/S

08-Apr-2025

15:08:46 PM

88

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:08:47 PM

7

1275.00

TQEX

GENMAB A/S

08-Apr-2025

15:08:47 PM

13

1275.00

TQEX

GENMAB A/S

08-Apr-2025

15:09:00 PM

32

1275.50

AQEU

GENMAB A/S

08-Apr-2025

15:09:00 PM

9

1275.50

AQEU

GENMAB A/S

08-Apr-2025

15:09:05 PM

29

1275.50

TQEX

GENMAB A/S

08-Apr-2025

15:09:05 PM

84

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:09:58 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:09:58 PM

22

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:09:58 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:09:58 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:09:58 PM

31

1275.50

TQEX

GENMAB A/S

08-Apr-2025

15:09:58 PM

84

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:09:58 PM

25

1275.50

AQEU

GENMAB A/S

08-Apr-2025

15:09:59 PM

12

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:09:59 PM

17

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

88

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

17

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

26

1275.50

XCSE

94


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:10:03 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

18

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:03 PM

25

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:18 PM

22

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:10:18 PM

78

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:18 PM

3

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:18 PM

3

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:18 PM

7

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:19 PM

40

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:19 PM

15

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:19 PM

15

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:19 PM

16

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:19 PM

19

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:20 PM

40

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:20 PM

13

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:20 PM

47

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:20 PM

1

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:10:20 PM

10

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:02 PM

90

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:11:02 PM

15

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:11:02 PM

15

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:11:02 PM

32

1276.50

CEUX

GENMAB A/S

08-Apr-2025

15:11:04 PM

14

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:11:04 PM

7

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:11:37 PM

32

1277.00

TQEX

GENMAB A/S

08-Apr-2025

15:11:37 PM

88

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:11:38 PM

2

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:38 PM

1

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:41 PM

15

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:44 PM

4

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:44 PM

16

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:44 PM

30

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:45 PM

3

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:46 PM

16

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:47 PM

13

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:11:47 PM

11

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:12:01 PM

16

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:12:10 PM

40

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:12:10 PM

13

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:12:10 PM

10

1277.00

XCSE

GENMAB A/S

08-Apr-2025

15:12:11 PM

1

1276.50

XCSE

95


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:12:56 PM

15

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:12:56 PM

9

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:16 PM

2

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:16 PM

1

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:16 PM

14

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:16 PM

19

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:18 PM

82

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:13:18 PM

24

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:13:18 PM

27

1276.00

TQEX

GENMAB A/S

08-Apr-2025

15:13:18 PM

43

1276.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:18 PM

43

1276.00

CEUX

GENMAB A/S

08-Apr-2025

15:13:18 PM

26

1276.50

AQEU

GENMAB A/S

08-Apr-2025

15:15:08 PM

54

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:08 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:10 PM

89

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:10 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:10 PM

11

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:10 PM

11

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:15:10 PM

15

1275.50

AQEU

GENMAB A/S

08-Apr-2025

15:15:10 PM

21

1275.50

AQEU

GENMAB A/S

08-Apr-2025

15:15:18 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:28 PM

4

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:28 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:28 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:28 PM

12

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:15:36 PM

52

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:15:55 PM

25

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:16:08 PM

1

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:08 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:08 PM

4

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:28 PM

2

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:28 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:28 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:28 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:48 PM

1

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:48 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:49 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:49 PM

2

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:16:59 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:10 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:10 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:21 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:21 PM

34

1275.50

XCSE

96


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:17:38 PM

2

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:38 PM

4

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:39 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:54 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:17:55 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:02 PM

1

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:12 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:12 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:29 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:30 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:18:30 PM

34

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:19:08 PM

19

1275.50

TQEX

GENMAB A/S

08-Apr-2025

15:19:08 PM

16

1275.50

TQEX

GENMAB A/S

08-Apr-2025

15:19:30 PM

13

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:31 PM

113

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:31 PM

5

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:31 PM

12

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:31 PM

46

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:31 PM

50

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:19:40 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:19:40 PM

15

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:19:40 PM

14

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:19:40 PM

90

1275.00

CEUX

GENMAB A/S

08-Apr-2025

15:19:41 PM

11

1275.00

TQEX

GENMAB A/S

08-Apr-2025

15:19:41 PM

11

1274.50

AQEU

GENMAB A/S

08-Apr-2025

15:20:26 PM

38

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:20:26 PM

15

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:22:05 PM

30

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:22:05 PM

9

1276.00

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

89

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

40

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

10

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

31

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

19

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:22:59 PM

7

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:22:59 PM

78

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:22:59 PM

8

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:22:59 PM

7

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:22:59 PM

13

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:23:05 PM

90

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:05 PM

12

1282.00

TQEX

GENMAB A/S

08-Apr-2025

15:23:05 PM

89

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:23:08 PM

30

1282.50

XCSE

97


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:23:08 PM

40

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:08 PM

30

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:08 PM

14

1282.00

TQEX

GENMAB A/S

08-Apr-2025

15:23:08 PM

2

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:23:17 PM

40

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:17 PM

30

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:29 PM

40

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:23:29 PM

6

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:23:29 PM

4

1282.00

AQEU

GENMAB A/S

08-Apr-2025

15:24:15 PM

27

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

4

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

40

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

14

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

40

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

16

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:15 PM

30

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:24:21 PM

86

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:24:21 PM

24

1283.00

TQEX

GENMAB A/S

08-Apr-2025

15:24:21 PM

86

1283.50

CEUX

GENMAB A/S

08-Apr-2025

15:24:21 PM

5

1283.00

AQEU

GENMAB A/S

08-Apr-2025

15:24:21 PM

26

1283.00

AQEU

GENMAB A/S

08-Apr-2025

15:24:48 PM

24

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:24:48 PM

40

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:24:48 PM

30

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:25:00 PM

88

1285.50

XCSE

GENMAB A/S

08-Apr-2025

15:25:00 PM

29

1285.00

TQEX

GENMAB A/S

08-Apr-2025

15:25:00 PM

40

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:00 PM

47

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:00 PM

24

1285.00

AQEU

GENMAB A/S

08-Apr-2025

15:25:04 PM

90

1285.50

XCSE

GENMAB A/S

08-Apr-2025

15:25:04 PM

52

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:04 PM

35

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:04 PM

24

1285.00

AQEU

GENMAB A/S

08-Apr-2025

15:25:24 PM

25

1286.00

TQEX

GENMAB A/S

08-Apr-2025

15:25:26 PM

11

1285.50

AQEU

GENMAB A/S

08-Apr-2025

15:25:29 PM

85

1285.50

XCSE

GENMAB A/S

08-Apr-2025

15:25:29 PM

79

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:29 PM

6

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:25:29 PM

13

1285.50

AQEU

GENMAB A/S

08-Apr-2025

15:26:37 PM

11

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:26:38 PM

3

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:26:55 PM

3

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:26:55 PM

48

1286.50

XCSE

98


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:27:22 PM

87

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:27:22 PM

31

1286.00

AQEU

GENMAB A/S

08-Apr-2025

15:28:00 PM

49

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:28:00 PM

36

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:28:00 PM

11

1285.50

TQEX

GENMAB A/S

08-Apr-2025

15:28:00 PM

1

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:28:00 PM

13

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:28:42 PM

40

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:28:42 PM

45

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:28:42 PM

50

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:28:42 PM

35

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:28:42 PM

20

1286.50

XCSE

GENMAB A/S

08-Apr-2025

15:28:42 PM

29

1286.50

TQEX

GENMAB A/S

08-Apr-2025

15:28:42 PM

87

1286.50

CEUX

GENMAB A/S

08-Apr-2025

15:28:42 PM

24

1287.00

AQEU

GENMAB A/S

08-Apr-2025

15:28:42 PM

11

1286.00

AQEU

GENMAB A/S

08-Apr-2025

15:29:34 PM

83

1285.50

XCSE

GENMAB A/S

08-Apr-2025

15:29:34 PM

14

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:29:34 PM

13

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:29:34 PM

15

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:29:34 PM

32

1286.00

TQEX

GENMAB A/S

08-Apr-2025

15:29:34 PM

76

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:29:34 PM

36

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:29:35 PM

15

1285.00

CEUX

GENMAB A/S

08-Apr-2025

15:29:35 PM

2

1285.00

AQEU

GENMAB A/S

08-Apr-2025

15:30:01 PM

88

1284.50

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

49

1287.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

13

1287.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

9

1287.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

9

1287.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

83

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:01 PM

10

1285.00

CEUX

GENMAB A/S

08-Apr-2025

15:30:01 PM

86

1284.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:01 PM

85

1286.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:01 PM

24

1285.00

AQEU

GENMAB A/S

08-Apr-2025

15:30:02 PM

41

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:02 PM

17

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:02 PM

31

1285.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:03 PM

13

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:03 PM

55

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:03 PM

20

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:08 PM

87

1284.50

CEUX

GENMAB A/S

08-Apr-2025

15:30:10 PM

84

1284.00

XCSE

99


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:30:10 PM

5

1283.00

CEUX

GENMAB A/S

08-Apr-2025

15:30:10 PM

8

1283.00

CEUX

GENMAB A/S

08-Apr-2025

15:30:11 PM

30

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:21 PM

56

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:30:21 PM

27

1283.00

TQEX

GENMAB A/S

08-Apr-2025

15:30:21 PM

77

1283.00

CEUX

GENMAB A/S

08-Apr-2025

15:30:38 PM

14

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:30:38 PM

40

1283.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:09 PM

31

1286.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

85

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

21

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

40

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

21

1285.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

31

1285.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:11 PM

21

1285.50

TQEX

GENMAB A/S

08-Apr-2025

15:31:11 PM

9

1285.50

TQEX

GENMAB A/S

08-Apr-2025

15:31:11 PM

27

1284.50

TQEX

GENMAB A/S

08-Apr-2025

15:31:11 PM

83

1285.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:11 PM

9

1284.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:11 PM

27

1285.00

AQEU

GENMAB A/S

08-Apr-2025

15:31:11 PM

14

1284.00

AQEU

GENMAB A/S

08-Apr-2025

15:31:12 PM

50

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:13 PM

38

1284.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:13 PM

76

1284.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:13 PM

14

1284.00

AQEU

GENMAB A/S

08-Apr-2025

15:31:16 PM

56

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:31:17 PM

13

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:17 PM

77

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:26 PM

90

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:26 PM

86

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:31:26 PM

77

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:26 PM

88

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

5

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

3

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

8

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

41

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

1

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

6

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:26 PM

17

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:27 PM

30

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:29 PM

72

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:34 PM

32

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:34 PM

10

1280.00

TQEX

100


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:31:37 PM

48

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:37 PM

11

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:31:37 PM

24

1279.00

TQEX

GENMAB A/S

08-Apr-2025

15:31:37 PM

33

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:37 PM

24

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:31:37 PM

30

1280.00

AQEU

GENMAB A/S

08-Apr-2025

15:31:54 PM

29

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:02 PM

40

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:02 PM

21

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:02 PM

30

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:02 PM

16

1283.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:02 PM

30

1282.50

TQEX

GENMAB A/S

08-Apr-2025

15:33:02 PM

20

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:33:02 PM

67

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:33:03 PM

88

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:03 PM

85

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:33:03 PM

33

1281.50

TQEX

GENMAB A/S

08-Apr-2025

15:33:03 PM

50

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:33:03 PM

11

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:33:03 PM

30

1281.50

AQEU

GENMAB A/S

08-Apr-2025

15:33:03 PM

19

1280.50

AQEU

GENMAB A/S

08-Apr-2025

15:33:33 PM

85

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:33 PM

90

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:33 PM

16

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:33 PM

83

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:33 PM

5

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:33 PM

20

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:33 PM

1

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:33 PM

63

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:33 PM

30

1281.50

AQEU

GENMAB A/S

08-Apr-2025

15:33:43 PM

10

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:43 PM

73

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:43 PM

87

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:44 PM

28

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:33:48 PM

10

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:33:48 PM

44

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:33:49 PM

20

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:34:00 PM

10

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:34:00 PM

30

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:34:00 PM

14

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:34:05 PM

40

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:05 PM

43

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:38 PM

15

1281.50

XCSE

101


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:34:38 PM

15

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:34:38 PM

40

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:38 PM

16

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:38 PM

21

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:38 PM

6

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:50 PM

86

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:51 PM

57

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:51 PM

40

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:51 PM

16

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:34:51 PM

39

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:34:51 PM

20

1280.50

AQEU

GENMAB A/S

08-Apr-2025

15:35:00 PM

35

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:35:00 PM

47

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:00 PM

6

1280.50

AQEU

GENMAB A/S

08-Apr-2025

15:35:27 PM

15

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:35:36 PM

30

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

1

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

20

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

2

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

63

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

36

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

14

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:36 PM

25

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:35:36 PM

32

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:36 PM

33

1280.50

AQEU

GENMAB A/S

08-Apr-2025

15:35:42 PM

5

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:51 PM

12

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:51 PM

12

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:55 PM

89

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

30

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

15

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

40

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

16

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

12

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

21

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

14

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

2

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

15

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

40

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

10

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

11

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:55 PM

20

1280.50

CEUX

102


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:35:55 PM

41

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:55 PM

27

1281.00

AQEU

GENMAB A/S

08-Apr-2025

15:35:56 PM

15

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:35:56 PM

18

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:56 PM

5

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:35:57 PM

47

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:35:57 PM

16

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:36:15 PM

19

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:36:25 PM

36

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:25 PM

49

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:37 PM

43

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:36:37 PM

44

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:36:37 PM

29

1278.50

TQEX

GENMAB A/S

08-Apr-2025

15:36:37 PM

89

1278.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:44 PM

37

1277.50

XCSE

GENMAB A/S

08-Apr-2025

15:36:44 PM

52

1277.50

XCSE

GENMAB A/S

08-Apr-2025

15:36:44 PM

44

1277.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:44 PM

38

1277.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:45 PM

6

1277.50

CEUX

GENMAB A/S

08-Apr-2025

15:36:53 PM

20

1277.00

AQEU

GENMAB A/S

08-Apr-2025

15:37:22 PM

89

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:37:22 PM

25

1279.50

TQEX

GENMAB A/S

08-Apr-2025

15:37:47 PM

86

1278.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

30

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

40

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

16

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

21

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

6

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:37:47 PM

83

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:01 PM

84

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:01 PM

15

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:01 PM

13

1279.50

AQEU

GENMAB A/S

08-Apr-2025

15:38:09 PM

73

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:24 PM

24

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:29 PM

89

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:54 PM

87

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:54 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:54 PM

15

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:54 PM

16

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:54 PM

15

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:38:54 PM

79

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:55 PM

36

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:38:56 PM

20

1280.00

CEUX

103


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:39:08 PM

27

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:08 PM

13

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:08 PM

16

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:08 PM

2

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:08 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:08 PM

21

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:14 PM

79

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:14 PM

7

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:39:14 PM

28

1279.50

TQEX

GENMAB A/S

08-Apr-2025

15:39:25 PM

45

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:39:25 PM

3

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:39:26 PM

14

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:39:26 PM

4

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:39:53 PM

17

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:39:53 PM

26

1280.00

TQEX

GENMAB A/S

08-Apr-2025

15:40:01 PM

69

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

40

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

18

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

13

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

22

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

13

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:01 PM

61

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:40:01 PM

24

1279.50

AQEU

GENMAB A/S

08-Apr-2025

15:40:09 PM

34

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:40:09 PM

52

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:40:09 PM

36

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:40:09 PM

24

1278.50

AQEU

GENMAB A/S

08-Apr-2025

15:40:20 PM

28

1278.50

TQEX

GENMAB A/S

08-Apr-2025

15:40:20 PM

10

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:20 PM

12

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:20 PM

23

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:20 PM

45

1278.50

AQEU

GENMAB A/S

08-Apr-2025

15:40:35 PM

89

1277.50

XCSE

GENMAB A/S

08-Apr-2025

15:40:35 PM

42

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:47 PM

14

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:48 PM

28

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:48 PM

21

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:52 PM

86

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:40:52 PM

10

1277.50

XCSE

GENMAB A/S

08-Apr-2025

15:40:57 PM

35

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:40:57 PM

3

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:41:00 PM

2

1278.00

CEUX

GENMAB A/S

08-Apr-2025

15:41:02 PM

76

1277.50

XCSE

104


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:41:27 PM

25

1277.50

TQEX

GENMAB A/S

08-Apr-2025

15:41:42 PM

5

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:41:42 PM

46

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:42:05 PM

16

1277.00

TQEX

GENMAB A/S

08-Apr-2025

15:42:05 PM

20

1277.00

AQEU

GENMAB A/S

08-Apr-2025

15:42:15 PM

90

1278.00

XCSE

GENMAB A/S

08-Apr-2025

15:42:32 PM

13

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:42:32 PM

15

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:42:32 PM

15

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:02 PM

28

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:02 PM

15

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:02 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:02 PM

15

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:03 PM

14

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:03 PM

16

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:03 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:08 PM

16

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:08 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:13 PM

85

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:43:13 PM

10

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:13 PM

4

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:13 PM

2

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:13 PM

3

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:13 PM

2

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:13 PM

3

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:43:28 PM

16

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:28 PM

16

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:28 PM

16

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:28 PM

14

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:28 PM

14

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:29 PM

14

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:29 PM

13

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:31 PM

55

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:37 PM

14

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:37 PM

40

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:43:48 PM

23

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:04 PM

31

1281.50

TQEX

GENMAB A/S

08-Apr-2025

15:44:04 PM

11

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:04 PM

4

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:04 PM

27

1281.50

AQEU

GENMAB A/S

08-Apr-2025

15:44:12 PM

41

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:44:12 PM

50

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:44:12 PM

3

1282.50

XCSE

105


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:44:17 PM

32

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:44:17 PM

1

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:17 PM

21

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:17 PM

5

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:17 PM

5

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:21 PM

89

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:21 PM

52

1282.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:35 PM

40

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:35 PM

6

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:35 PM

30

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:35 PM

14

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:35 PM

23

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:35 PM

16

1281.50

TQEX

GENMAB A/S

08-Apr-2025

15:44:35 PM

8

1281.50

TQEX

GENMAB A/S

08-Apr-2025

15:44:35 PM

24

1281.50

AQEU

GENMAB A/S

08-Apr-2025

15:44:36 PM

83

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:44:36 PM

13

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:44:36 PM

45

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:36 PM

29

1281.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:44 PM

83

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:44:44 PM

3

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:44 PM

46

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:44 PM

36

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:44 PM

88

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:50 PM

1

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:44:50 PM

1

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:44:58 PM

12

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:44:58 PM

43

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:45:09 PM

86

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:45:18 PM

63

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:45:47 PM

22

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:45:49 PM

21

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:45:56 PM

8

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:45:56 PM

10

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:46:01 PM

30

1281.00

TQEX

GENMAB A/S

08-Apr-2025

15:46:02 PM

3

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:46:02 PM

45

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:46:27 PM

13

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:46:40 PM

81

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

7

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

70

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

15

1282.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

15

1282.50

XCSE

106


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:47:00 PM

13

1282.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

1

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

1

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

1

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

24

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

20

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

28

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

1

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:00 PM

24

1282.50

TQEX

GENMAB A/S

08-Apr-2025

15:47:00 PM

89

1282.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:00 PM

10

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:00 PM

24

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:00 PM

32

1281.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:00 PM

25

1282.50

AQEU

GENMAB A/S

08-Apr-2025

15:47:00 PM

24

1281.50

AQEU

GENMAB A/S

08-Apr-2025

15:47:07 PM

82

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:07 PM

48

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:07 PM

40

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:07 PM

19

1280.50

XCSE

GENMAB A/S

08-Apr-2025

15:47:07 PM

12

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:07 PM

8

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:47:07 PM

27

1280.50

AQEU

GENMAB A/S

08-Apr-2025

15:47:28 PM

13

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:28 PM

11

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:28 PM

14

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:28 PM

20

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:29 PM

1

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:29 PM

60

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:29 PM

23

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:47:29 PM

44

1280.00

CEUX

GENMAB A/S

08-Apr-2025

15:47:36 PM

30

1279.50

TQEX

GENMAB A/S

08-Apr-2025

15:47:36 PM

83

1279.00

CEUX

GENMAB A/S

08-Apr-2025

15:48:07 PM

1

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

61

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

40

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

15

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

14

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

16

1281.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

24

1281.00

XCSE

GENMAB A/S

08-Apr-2025

15:48:11 PM

12

1281.00

AQEU

GENMAB A/S

08-Apr-2025

15:48:14 PM

4

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:48:14 PM

12

1280.50

TQEX

GENMAB A/S

08-Apr-2025

15:48:14 PM

20

1280.50

CEUX

107


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:48:14 PM

17

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:14 PM

20

1280.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:27 PM

85

1280.00

XCSE

GENMAB A/S

08-Apr-2025

15:48:28 PM

3

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

33

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:48:33 PM

52

1279.00

XCSE

GENMAB A/S

08-Apr-2025

15:48:33 PM

14

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:33 PM

16

1279.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:33 PM

10

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

9

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

3

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

12

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

30

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

8

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

5

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

1

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:33 PM

6

1279.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:35 PM

23

1278.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:45 PM

15

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:45 PM

12

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:45 PM

15

1279.00

TQEX

GENMAB A/S

08-Apr-2025

15:48:45 PM

6

1279.00

TQEX

GENMAB A/S

08-Apr-2025

15:48:45 PM

3

1279.00

TQEX

GENMAB A/S

08-Apr-2025

15:48:45 PM

7

1278.50

CEUX

GENMAB A/S

08-Apr-2025

15:48:57 PM

60

1278.50

XCSE

GENMAB A/S

08-Apr-2025

15:48:57 PM

14

1278.50

CEUX

GENMAB A/S

08-Apr-2025

15:49:00 PM

88

1277.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:08 PM

48

1277.00

CEUX

GENMAB A/S

08-Apr-2025

15:49:09 PM

83

1276.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

87

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

90

1274.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

12

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

1

1275.50

XCSE

GENMAB A/S

08-Apr-2025

15:49:09 PM

26

1275.50

CEUX

GENMAB A/S

08-Apr-2025

15:49:09 PM

49

1274.00

CEUX

GENMAB A/S

08-Apr-2025

15:49:09 PM

26

1274.50

CEUX

GENMAB A/S

08-Apr-2025

15:49:09 PM

31

1276.00

AQEU

GENMAB A/S

08-Apr-2025

15:49:09 PM

27

1275.00

AQEU

GENMAB A/S

08-Apr-2025

15:49:18 PM

14

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:49:54 PM

12

1275.00

XCSE

GENMAB A/S

08-Apr-2025

15:49:54 PM

24

1275.50

CEUX

108


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:49:57 PM

15

1274.50

CEUX

GENMAB A/S

08-Apr-2025

15:49:57 PM

11

1274.50

CEUX

GENMAB A/S

08-Apr-2025

15:50:17 PM

33

1274.50

CEUX

GENMAB A/S

08-Apr-2025

15:50:27 PM

25

1274.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:27 PM

5

1273.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:27 PM

33

1273.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:27 PM

30

1274.00

TQEX

GENMAB A/S

08-Apr-2025

15:50:27 PM

16

1273.00

TQEX

GENMAB A/S

08-Apr-2025

15:50:27 PM

15

1273.00

CEUX

GENMAB A/S

08-Apr-2025

15:50:27 PM

10

1273.00

CEUX

GENMAB A/S

08-Apr-2025

15:50:49 PM

7

1273.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:49 PM

59

1273.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:49 PM

21

1273.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:50 PM

89

1272.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:53 PM

10

1272.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:53 PM

40

1272.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:53 PM

38

1272.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:53 PM

7

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:50:53 PM

15

1271.50

CEUX

GENMAB A/S

08-Apr-2025

15:50:53 PM

5

1271.50

CEUX

GENMAB A/S

08-Apr-2025

15:50:53 PM

11

1271.50

CEUX

GENMAB A/S

08-Apr-2025

15:50:53 PM

4

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:51:01 PM

76

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:51:01 PM

25

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:01 PM

36

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:51:01 PM

24

1270.00

AQEU

GENMAB A/S

08-Apr-2025

15:51:09 PM

36

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:09 PM

12

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:27 PM

33

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:55 PM

86

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:56 PM

57

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:51:56 PM

24

1270.00

TQEX

GENMAB A/S

08-Apr-2025

15:51:56 PM

10

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:51:56 PM

33

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:52:00 PM

30

1269.00

AQEU

GENMAB A/S

08-Apr-2025

15:52:30 PM

15

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:52:31 PM

25

1270.00

TQEX

GENMAB A/S

08-Apr-2025

15:52:31 PM

64

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:52:57 PM

90

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:52:59 PM

29

1270.50

TQEX

GENMAB A/S

08-Apr-2025

15:52:59 PM

24

1270.50

AQEU

GENMAB A/S

08-Apr-2025

15:53:09 PM

5

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:53:09 PM

79

1270.50

XCSE

109


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:53:09 PM

84

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:53:17 PM

11

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:53:17 PM

77

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:53:17 PM

5

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:53:17 PM

90

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:53:17 PM

9

1268.50

CEUX

GENMAB A/S

08-Apr-2025

15:53:34 PM

41

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:53:34 PM

13

1268.50

CEUX

GENMAB A/S

08-Apr-2025

15:53:34 PM

22

1268.50

CEUX

GENMAB A/S

08-Apr-2025

15:53:48 PM

12

1268.00

TQEX

GENMAB A/S

08-Apr-2025

15:54:02 PM

30

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:02 PM

52

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:03 PM

5

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:17 PM

75

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:54:27 PM

90

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:27 PM

64

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:54:38 PM

34

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:38 PM

43

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:38 PM

8

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:54:38 PM

5

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:54:38 PM

22

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:54:57 PM

7

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:54:57 PM

29

1268.50

TQEX

GENMAB A/S

08-Apr-2025

15:54:57 PM

11

1268.50

CEUX

GENMAB A/S

08-Apr-2025

15:54:57 PM

14

1268.50

CEUX

GENMAB A/S

08-Apr-2025

15:54:57 PM

24

1268.50

AQEU

GENMAB A/S

08-Apr-2025

15:55:11 PM

3

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

40

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

22

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

1

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

16

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

13

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

41

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:55:30 PM

25

1268.50

TQEX

GENMAB A/S

08-Apr-2025

15:55:30 PM

24

1268.50

AQEU

GENMAB A/S

08-Apr-2025

15:55:57 PM

48

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:55:57 PM

40

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:55:57 PM

16

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:55:57 PM

43

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:55:57 PM

20

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:56:00 PM

40

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:00 PM

20

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:00 PM

16

1269.50

XCSE

110


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:56:00 PM

14

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:00 PM

23

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:00 PM

22

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:56:41 PM

15

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:41 PM

30

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:41 PM

18

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:56:41 PM

37

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:56:41 PM

48

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:56:41 PM

25

1270.50

AQEU

GENMAB A/S

08-Apr-2025

15:56:45 PM

86

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

3

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

40

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

19

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

30

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

10

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:56:45 PM

24

1270.00

TQEX

GENMAB A/S

08-Apr-2025

15:56:46 PM

83

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:03 PM

28

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:03 PM

22

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:03 PM

40

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:04 PM

21

1268.00

AQEU

GENMAB A/S

08-Apr-2025

15:57:16 PM

49

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:16 PM

40

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:57:16 PM

20

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:57:16 PM

16

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:57:16 PM

8

1268.50

XCSE

GENMAB A/S

08-Apr-2025

15:57:16 PM

5

1268.50

TQEX

GENMAB A/S

08-Apr-2025

15:57:16 PM

16

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:16 PM

18

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:16 PM

41

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:22 PM

86

1269.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:22 PM

29

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:22 PM

40

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:22 PM

11

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:22 PM

45

1269.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:22 PM

50

1268.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:23 PM

10

1268.00

XCSE

GENMAB A/S

08-Apr-2025

15:57:27 PM

74

1267.00

CEUX

GENMAB A/S

08-Apr-2025

15:57:47 PM

84

1267.50

XCSE

GENMAB A/S

08-Apr-2025

15:58:05 PM

11

1268.00

AQEU

GENMAB A/S

08-Apr-2025

15:58:34 PM

68

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:58:35 PM

1

1269.50

XCSE

111


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

15:58:35 PM

5

1270.00

TQEX

GENMAB A/S

08-Apr-2025

15:58:35 PM

25

1270.00

TQEX

GENMAB A/S

08-Apr-2025

15:58:44 PM

61

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

11

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

20

1271.50

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

3

1272.00

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:58:52 PM

30

1271.50

TQEX

GENMAB A/S

08-Apr-2025

15:58:52 PM

64

1271.50

CEUX

GENMAB A/S

08-Apr-2025

15:58:52 PM

10

1271.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:05 PM

62

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:14 PM

85

1271.00

XCSE

GENMAB A/S

08-Apr-2025

15:59:28 PM

25

1271.00

CEUX

GENMAB A/S

08-Apr-2025

15:59:28 PM

5

1271.00

AQEU

GENMAB A/S

08-Apr-2025

15:59:28 PM

19

1271.00

AQEU

GENMAB A/S

08-Apr-2025

15:59:30 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:30 PM

14

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:30 PM

15

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:30 PM

20

1270.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:30 PM

6

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:30 PM

31

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:30 PM

19

1270.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:58 PM

88

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

14

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

15

1269.50

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

40

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

18

1270.00

XCSE

GENMAB A/S

08-Apr-2025

15:59:58 PM

19

1269.50

CEUX

GENMAB A/S

08-Apr-2025

15:59:58 PM

20

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:00:03 PM

24

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:00:03 PM

9

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:00:06 PM

83

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:00:06 PM

9

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:00:06 PM

37

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:00:06 PM

8

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:00:17 PM

85

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:00:17 PM

32

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:00:17 PM

13

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:00:25 PM

80

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:00:28 PM

7

1270.00

XCSE

112


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:00:28 PM

4

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:00:28 PM

15

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:00:28 PM

26

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:00:28 PM

32

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:00:42 PM

83

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:00:42 PM

33

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:00:59 PM

17

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:00:59 PM

65

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:00:59 PM

28

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:05 PM

6

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:05 PM

11

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:06 PM

10

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:15 PM

87

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:15 PM

20

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:15 PM

11

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:01:37 PM

84

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:53 PM

74

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:53 PM

4

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:53 PM

3

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:53 PM

3

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:01:53 PM

24

1268.50

CEUX

GENMAB A/S

08-Apr-2025

16:01:53 PM

35

1269.00

AQEU

GENMAB A/S

08-Apr-2025

16:02:10 PM

73

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:02:11 PM

11

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:02:11 PM

14

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:02:12 PM

84

1267.50

XCSE

GENMAB A/S

08-Apr-2025

16:02:12 PM

11

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:02:12 PM

15

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:02:12 PM

27

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:02:57 PM

52

1267.50

XCSE

GENMAB A/S

08-Apr-2025

16:03:03 PM

59

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:03:17 PM

29

1266.50

XCSE

GENMAB A/S

08-Apr-2025

16:03:28 PM

88

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:03:28 PM

26

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:03:28 PM

12

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:03:34 PM

83

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:03:34 PM

73

1268.50

CEUX

GENMAB A/S

08-Apr-2025

16:03:47 PM

47

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:03:47 PM

18

1268.00

AQEU

GENMAB A/S

08-Apr-2025

16:03:47 PM

16

1268.00

AQEU

GENMAB A/S

08-Apr-2025

16:04:00 PM

24

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:04:02 PM

20

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:02 PM

34

1268.00

CEUX

113


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:04:13 PM

89

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:04:13 PM

3

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:13 PM

12

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:35 PM

89

1267.50

XCSE

GENMAB A/S

08-Apr-2025

16:04:35 PM

49

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:42 PM

45

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:04:42 PM

40

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:04:42 PM

22

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:04:42 PM

1

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:04:42 PM

24

1267.50

TQEX

GENMAB A/S

08-Apr-2025

16:04:46 PM

63

1267.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:51 PM

21

1267.00

CEUX

GENMAB A/S

08-Apr-2025

16:04:51 PM

10

1267.00

CEUX

GENMAB A/S

08-Apr-2025

16:05:04 PM

28

1266.50

XCSE

GENMAB A/S

08-Apr-2025

16:05:04 PM

18

1266.50

XCSE

GENMAB A/S

08-Apr-2025

16:05:04 PM

18

1266.00

CEUX

GENMAB A/S

08-Apr-2025

16:05:04 PM

11

1266.00

CEUX

GENMAB A/S

08-Apr-2025

16:05:05 PM

69

1265.50

XCSE

GENMAB A/S

08-Apr-2025

16:05:05 PM

20

1265.50

XCSE

GENMAB A/S

08-Apr-2025

16:05:15 PM

38

1265.50

CEUX

GENMAB A/S

08-Apr-2025

16:05:16 PM

24

1266.00

CEUX

GENMAB A/S

08-Apr-2025

16:05:26 PM

36

1267.00

XCSE

GENMAB A/S

08-Apr-2025

16:05:26 PM

10

1266.50

CEUX

GENMAB A/S

08-Apr-2025

16:05:29 PM

10

1266.50

CEUX

GENMAB A/S

08-Apr-2025

16:05:29 PM

4

1266.50

CEUX

GENMAB A/S

08-Apr-2025

16:05:29 PM

31

1266.50

AQEU

GENMAB A/S

08-Apr-2025

16:05:43 PM

46

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:05:43 PM

10

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:05:43 PM

40

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:05:43 PM

6

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:06:07 PM

48

1267.00

XCSE

GENMAB A/S

08-Apr-2025

16:06:11 PM

48

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:06:34 PM

16

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:06:34 PM

40

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:06:35 PM

40

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:06:36 PM

36

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:06:43 PM

89

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:06:43 PM

4

1268.00

TQEX

GENMAB A/S

08-Apr-2025

16:06:43 PM

1

1268.00

TQEX

GENMAB A/S

08-Apr-2025

16:06:44 PM

28

1268.00

TQEX

GENMAB A/S

08-Apr-2025

16:07:06 PM

37

1267.50

CEUX

GENMAB A/S

08-Apr-2025

16:07:17 PM

40

1267.00

XCSE

GENMAB A/S

08-Apr-2025

16:07:37 PM

83

1268.00

XCSE

114


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:07:41 PM

2

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:07:41 PM

62

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:07:41 PM

20

1268.00

AQEU

GENMAB A/S

08-Apr-2025

16:07:42 PM

21

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:07:45 PM

40

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:07:45 PM

5

1268.00

AQEU

GENMAB A/S

08-Apr-2025

16:07:56 PM

5

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:07:57 PM

7

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:07:58 PM

14

1268.50

TQEX

GENMAB A/S

08-Apr-2025

16:08:10 PM

8

1269.00

TQEX

GENMAB A/S

08-Apr-2025

16:08:10 PM

86

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:08:10 PM

10

1269.00

AQEU

GENMAB A/S

08-Apr-2025

16:08:10 PM

7

1269.00

AQEU

GENMAB A/S

08-Apr-2025

16:09:07 PM

50

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

38

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

19

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

33

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

34

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

40

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

30

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

13

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

30

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:07 PM

33

1269.50

TQEX

GENMAB A/S

08-Apr-2025

16:09:07 PM

24

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:09:07 PM

59

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:09:07 PM

21

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:09:07 PM

15

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:09:07 PM

26

1270.00

AQEU

GENMAB A/S

08-Apr-2025

16:09:07 PM

7

1269.00

AQEU

GENMAB A/S

08-Apr-2025

16:09:08 PM

16

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

40

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

15

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

22

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

15

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

5

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

8

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

13

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

40

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:09:08 PM

15

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

84

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

60

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

20

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

9

1271.50

XCSE

115


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:10:15 PM

40

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

29

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

16

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

26

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

2

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:10:15 PM

38

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:10:15 PM

85

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:10:15 PM

6

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:10:15 PM

20

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:10:15 PM

64

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:10:15 PM

39

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:10:21 PM

36

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:10:27 PM

83

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:11:01 PM

85

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:11:01 PM

30

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:11:01 PM

28

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:11:01 PM

20

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:11:01 PM

7

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:11:17 PM

48

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:11:17 PM

40

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:11:19 PM

24

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:11:20 PM

3

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:11:20 PM

12

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:11:31 PM

84

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:11:31 PM

79

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:11:57 PM

87

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:12:17 PM

2

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:12:17 PM

35

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:12:17 PM

1

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:12:17 PM

13

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:12:24 PM

11

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:12:25 PM

3

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:12:25 PM

58

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:13:27 PM

47

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:13:47 PM

13

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:13:59 PM

6

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:13:59 PM

22

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:14:17 PM

81

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:17 PM

20

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:14:18 PM

46

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:18 PM

45

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:18 PM

30

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:18 PM

15

1271.50

XCSE

116


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:14:18 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:18 PM

8

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:18 PM

84

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:14:18 PM

36

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:14:18 PM

8

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:14:18 PM

27

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:14:18 PM

20

1271.00

AQEU

GENMAB A/S

08-Apr-2025

16:14:18 PM

13

1271.00

AQEU

GENMAB A/S

08-Apr-2025

16:14:28 PM

46

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

27

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

20

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

16

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:28 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

16

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

21

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:14:29 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:15:17 PM

32

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:15:17 PM

24

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:15:23 PM

55

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

15

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

14

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

85

1268.50

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

30

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

21

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:15:23 PM

13

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:15:23 PM

5

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:15:23 PM

21

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:15:23 PM

1

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

20

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

30

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

39

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

85

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

24

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

46

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:15:23 PM

28

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:15:37 PM

85

1269.50

XCSE

117


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:15:45 PM

71

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:15:46 PM

16

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:16:06 PM

86

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:16:38 PM

30

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:16:38 PM

81

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:16:39 PM

3

1270.00

AQEU

GENMAB A/S

08-Apr-2025

16:16:39 PM

8

1270.00

AQEU

GENMAB A/S

08-Apr-2025

16:17:15 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:15 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:15 PM

18

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:17:16 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:16 PM

23

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:52 PM

24

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:17:58 PM

71

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:17:58 PM

15

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:17:58 PM

17

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:17:59 PM

47

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:59 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:17:59 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:00 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:00 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:00 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:00 PM

3

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:00 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:01 PM

23

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:01 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:07 PM

25

1271.00

AQEU

GENMAB A/S

08-Apr-2025

16:18:08 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:08 PM

23

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:08 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:08 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:08 PM

23

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:22 PM

86

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:18:22 PM

2

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:18:22 PM

39

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:18:24 PM

89

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:18:24 PM

26

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:18:30 PM

12

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:18:30 PM

73

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:19:07 PM

90

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:19:27 PM

24

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:19:42 PM

37

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:19:44 PM

49

1270.50

CEUX

118


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:19:47 PM

14

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:15 PM

40

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:20:15 PM

24

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:20:15 PM

10

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:20:15 PM

4

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:20:15 PM

5

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:20:22 PM

9

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:22 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:22 PM

13

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:22 PM

15

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:42 PM

24

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:42 PM

49

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:20:47 PM

24

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:21:25 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:21:25 PM

24

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:25 PM

40

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:25 PM

9

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

40

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

16

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

9

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

9

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

22

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

40

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

16

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:26 PM

7

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:21:26 PM

9

1270.50

TQEX

GENMAB A/S

08-Apr-2025

16:21:27 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:21:45 PM

12

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:22:12 PM

31

1272.50

TQEX

GENMAB A/S

08-Apr-2025

16:22:14 PM

36

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:22:37 PM

36

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:22:57 PM

36

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:22:57 PM

38

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:23:02 PM

36

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:23:08 PM

4

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:23:25 PM

18

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:23:29 PM

71

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:23:29 PM

36

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:23:29 PM

25

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:23:29 PM

24

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:23:47 PM

87

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:23:47 PM

45

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:23:47 PM

16

1272.50

TQEX

119


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:23:47 PM

13

1272.50

TQEX

GENMAB A/S

08-Apr-2025

16:23:47 PM

36

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:23:48 PM

48

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:23:48 PM

10

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:23:48 PM

4

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:23:51 PM

13

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:23:51 PM

16

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:23:51 PM

20

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:23:55 PM

30

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:23:55 PM

14

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:23:55 PM

83

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:23:55 PM

3

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:23:56 PM

48

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:23:56 PM

30

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:23:56 PM

26

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:24:28 PM

90

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:24:28 PM

48

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:24:28 PM

12

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:24:28 PM

13

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:24:28 PM

21

1271.50

TQEX

GENMAB A/S

08-Apr-2025

16:24:57 PM

50

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:24:57 PM

36

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:24:57 PM

90

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:25:17 PM

1

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

33

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

10

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

45

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

15

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

13

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:25:17 PM

21

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:25:17 PM

3

1270.00

TQEX

GENMAB A/S

08-Apr-2025

16:25:17 PM

6

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:25:17 PM

20

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:25:17 PM

10

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:25:17 PM

45

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:25:24 PM

100

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:26 PM

45

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:26 PM

33

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:26:26 PM

20

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:26:41 PM

20

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:26:41 PM

41

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:26:41 PM

23

1271.00

CEUX

120


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:26:41 PM

16

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:26:41 PM

5

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:26:42 PM

15

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:42 PM

31

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

8

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

31

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

20

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

47

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

40

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

15

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

11

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:49 PM

89

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:26:50 PM

13

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:50 PM

31

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:50 PM

40

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:50 PM

14

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:50 PM

15

1271.00

XCSE

GENMAB A/S

08-Apr-2025

16:26:56 PM

24

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:26:56 PM

39

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:26:56 PM

7

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:27:00 PM

14

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:01 PM

9

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:01 PM

5

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:17 PM

53

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:17 PM

46

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:27:28 PM

3

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:28 PM

30

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:28 PM

16

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:27:28 PM

1

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:27:30 PM

48

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:30 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:30 PM

23

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:30 PM

10

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:27:57 PM

87

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:27:57 PM

1

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:06 PM

43

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:17 PM

43

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:17 PM

83

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:17 PM

29

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:28:17 PM

37

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:28:45 PM

40

1271.50

XCSE

121


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:28:45 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:45 PM

48

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:45 PM

21

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:45 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:45 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:28:45 PM

68

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:29:17 PM

24

1271.50

AQEU

GENMAB A/S

08-Apr-2025

16:29:26 PM

45

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

15

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

30

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

15

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

14

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

15

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:26 PM

39

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:27 PM

13

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:27 PM

25

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:27 PM

40

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:27 PM

16

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:27 PM

19

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:29:31 PM

6

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:29:47 PM

24

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:29:48 PM

10

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:29:52 PM

2

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:29:52 PM

24

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:30:03 PM

21

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:03 PM

40

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:03 PM

39

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:03 PM

13

1271.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:03 PM

84

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:03 PM

19

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:30:03 PM

87

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:30:04 PM

6

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:30:11 PM

22

1270.50

AQEU

GENMAB A/S

08-Apr-2025

16:30:35 PM

2

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:30:35 PM

41

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:30:35 PM

43

1270.50

CEUX

GENMAB A/S

08-Apr-2025

16:30:36 PM

27

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:36 PM

31

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:37 PM

29

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:55 PM

75

1269.50

XCSE

GENMAB A/S

08-Apr-2025

16:30:55 PM

2

1269.50

CEUX

GENMAB A/S

08-Apr-2025

16:30:55 PM

49

1269.50

CEUX

122


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:31:27 PM

27

1268.00

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

90

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

13

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

21

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

31

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

15

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:26 PM

14

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:27 PM

13

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:27 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:27 PM

16

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:29 PM

36

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:32:29 PM

44

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:32:29 PM

42

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:32:38 PM

13

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:38 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:38 PM

30

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:38 PM

8

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:38 PM

34

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:32:38 PM

49

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:32:45 PM

25

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:32:54 PM

7

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:33:07 PM

23

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:33:07 PM

26

1273.00

TQEX

GENMAB A/S

08-Apr-2025

16:33:27 PM

44

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:33:37 PM

42

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:33:37 PM

2

1273.00

TQEX

GENMAB A/S

08-Apr-2025

16:33:37 PM

85

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:33:37 PM

36

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:33:37 PM

25

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:33:47 PM

45

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:33:47 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:33:47 PM

44

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:33:49 PM

16

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:33:50 PM

9

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:33:55 PM

5

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:34:07 PM

14

1273.00

TQEX

GENMAB A/S

08-Apr-2025

16:34:07 PM

9

1273.00

TQEX

GENMAB A/S

08-Apr-2025

16:34:07 PM

24

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:34:15 PM

40

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:15 PM

24

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:15 PM

66

1272.50

XCSE

123


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:34:15 PM

6

1273.00

TQEX

GENMAB A/S

08-Apr-2025

16:34:56 PM

37

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:56 PM

51

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:56 PM

30

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:56 PM

15

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:34:56 PM

38

1274.00

TQEX

GENMAB A/S

08-Apr-2025

16:34:56 PM

17

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:34:56 PM

72

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:34:56 PM

27

1274.00

AQEU

GENMAB A/S

08-Apr-2025

16:34:57 PM

25

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:07 PM

5

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:35:07 PM

20

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:35:13 PM

84

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

29

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

1

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

10

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

1

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

4

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

40

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

13

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

25

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

16

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

19

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:13 PM

25

1276.00

AQEU

GENMAB A/S

08-Apr-2025

16:35:14 PM

70

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:35:38 PM

47

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:38 PM

17

1276.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:46 PM

10

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:46 PM

51

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:35:46 PM

20

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:35:57 PM

29

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:35:57 PM

45

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:36:19 PM

83

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:36:19 PM

42

1277.00

CEUX

GENMAB A/S

08-Apr-2025

16:36:19 PM

24

1277.00

CEUX

GENMAB A/S

08-Apr-2025

16:36:19 PM

61

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:36:19 PM

36

1277.00

AQEU

GENMAB A/S

08-Apr-2025

16:36:23 PM

15

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

20

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

40

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

25

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

13

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

10

1276.50

XCSE

124


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:36:30 PM

55

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:36:30 PM

42

1276.50

TQEX

GENMAB A/S

08-Apr-2025

16:36:30 PM

10

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:36:30 PM

14

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:36:52 PM

35

1277.00

CEUX

GENMAB A/S

08-Apr-2025

16:36:57 PM

3

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:09 PM

40

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:09 PM

24

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:09 PM

38

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:09 PM

11

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:09 PM

33

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:37:17 PM

33

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:37:21 PM

20

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:21 PM

70

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:21 PM

10

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:37:21 PM

19

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:37:31 PM

50

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:31 PM

3

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:48 PM

67

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:50 PM

4

1275.50

AQEU

GENMAB A/S

08-Apr-2025

16:37:50 PM

12

1275.50

AQEU

GENMAB A/S

08-Apr-2025

16:37:50 PM

19

1275.50

AQEU

GENMAB A/S

08-Apr-2025

16:37:56 PM

42

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:37:56 PM

25

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:38:12 PM

67

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:38:24 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:38:24 PM

12

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:38:24 PM

17

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:38:24 PM

1

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:38:29 PM

24

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:38:56 PM

26

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:38:56 PM

32

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:38:56 PM

36

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:39:01 PM

5

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:39:03 PM

18

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:39:07 PM

84

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:39:07 PM

11

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:39:12 PM

13

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:39:19 PM

79

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:39:25 PM

8

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:39:25 PM

5

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:39:30 PM

1

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:39:30 PM

5

1275.00

TQEX

125


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:39:47 PM

39

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:39:47 PM

32

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:07 PM

50

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

40

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

28

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

15

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

16

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

14

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:20 PM

7

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

8

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

23

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

13

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

11

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

9

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

7

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:20 PM

8

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:40:21 PM

40

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:21 PM

16

1276.50

XCSE

GENMAB A/S

08-Apr-2025

16:40:21 PM

14

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:21 PM

40

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:21 PM

16

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:22 PM

14

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:22 PM

40

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:22 PM

13

1277.00

XCSE

GENMAB A/S

08-Apr-2025

16:40:26 PM

25

1276.00

AQEU

GENMAB A/S

08-Apr-2025

16:40:28 PM

14

1276.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:02 PM

2

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:02 PM

36

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:41:02 PM

36

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:02 PM

10

1276.00

AQEU

GENMAB A/S

08-Apr-2025

16:41:03 PM

27

1276.00

TQEX

GENMAB A/S

08-Apr-2025

16:41:04 PM

19

1276.00

AQEU

GENMAB A/S

08-Apr-2025

16:41:10 PM

88

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:10 PM

25

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:10 PM

10

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:10 PM

10

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:10 PM

8

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:26 PM

3

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:41:26 PM

14

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:41:29 PM

16

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:37 PM

15

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:37 PM

7

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:41:37 PM

4

1275.00

TQEX

126


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:41:37 PM

21

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:45 PM

35

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:45 PM

13

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:41:48 PM

6

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:41:53 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:53 PM

21

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:53 PM

6

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:41:53 PM

42

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:42:01 PM

47

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:42:01 PM

66

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:42:01 PM

34

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:42:01 PM

17

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:42:01 PM

1

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:42:01 PM

3

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:42:06 PM

10

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:42:06 PM

15

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:42:17 PM

68

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:42:17 PM

27

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:43:17 PM

33

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:17 PM

14

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:43:17 PM

4

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:43:17 PM

36

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:17 PM

43

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:17 PM

4

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:23 PM

3

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:43:23 PM

3

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:24 PM

45

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:24 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:24 PM

26

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:24 PM

2

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:24 PM

15

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:43:25 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:25 PM

26

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:25 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:25 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:25 PM

20

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:26 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:26 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

46

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

40

1275.50

XCSE

127


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:43:27 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:27 PM

1

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:43:27 PM

9

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:28 PM

37

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

11

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

65

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

35

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

32

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:28 PM

2

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:29 PM

7

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:34 PM

36

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:34 PM

7

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:34 PM

8

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:34 PM

5

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:34 PM

1

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:36 PM

24

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:43:36 PM

36

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:36 PM

9

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:36 PM

7

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:43:39 PM

1

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:44 PM

1

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:47 PM

4

1275.00

AQEU

GENMAB A/S

08-Apr-2025

16:43:53 PM

1

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:44:03 PM

26

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:03 PM

10

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:08 PM

51

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:44:08 PM

30

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:08 PM

1

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:08 PM

13

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:08 PM

24

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:24 PM

1

1274.00

TQEX

GENMAB A/S

08-Apr-2025

16:44:37 PM

87

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:44:47 PM

38

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:44:47 PM

19

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:44:57 PM

84

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:44:57 PM

2

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:44:57 PM

32

1274.50

AQEU

GENMAB A/S

08-Apr-2025

16:45:10 PM

12

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

38

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

40

1275.50

XCSE

128


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:45:10 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

8

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

6

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

10

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

6

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

32

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:10 PM

30

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:26 PM

38

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:26 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:26 PM

48

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:26 PM

58

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:27 PM

16

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:45:27 PM

36

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:45:28 PM

36

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:45:28 PM

10

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:28 PM

7

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:33 PM

21

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:35 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:35 PM

8

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:45:35 PM

27

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:35 PM

24

1275.00

TQEX

GENMAB A/S

08-Apr-2025

16:45:36 PM

24

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:45:39 PM

2

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:47 PM

16

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:47 PM

32

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:47 PM

25

1274.50

AQEU

GENMAB A/S

08-Apr-2025

16:45:54 PM

24

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:54 PM

23

1274.00

TQEX

GENMAB A/S

08-Apr-2025

16:45:54 PM

31

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:45:54 PM

26

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:45:55 PM

45

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:45:55 PM

67

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:46:01 PM

12

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:46:01 PM

15

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:46:06 PM

1

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:46:06 PM

52

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:46:37 PM

36

1273.50

CEUX

129


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:46:37 PM

8

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:46:37 PM

38

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:46:53 PM

2

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:46:53 PM

8

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:46:53 PM

19

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:46:53 PM

3

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:46:53 PM

57

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:46:57 PM

89

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:47:07 PM

36

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:47:31 PM

44

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:47:31 PM

44

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:47:40 PM

25

1274.00

AQEU

GENMAB A/S

08-Apr-2025

16:48:07 PM

70

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:07 PM

4

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:07 PM

32

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:48:07 PM

48

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:07 PM

36

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:08 PM

40

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:08 PM

14

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:08 PM

33

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:08 PM

26

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:08 PM

7

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:08 PM

9

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:08 PM

38

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:11 PM

47

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:11 PM

39

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:11 PM

27

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

6

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

38

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

29

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

14

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

14

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

12

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

40

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

15

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

29

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

15

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

14

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

30

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

13

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

29

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

13

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:12 PM

28

1274.00

XCSE

130


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:48:14 PM

1

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:14 PM

36

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:48:18 PM

15

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:18 PM

25

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:48:20 PM

10

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:20 PM

3

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:20 PM

6

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:48:31 PM

11

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:48:31 PM

1

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:49:04 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

19

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

14

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

15

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

14

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:04 PM

11

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:49:07 PM

77

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:49:27 PM

65

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

3

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

15

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

32

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

23

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:36 PM

21

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:49:44 PM

40

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:44 PM

13

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:44 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:49:45 PM

39

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:49:59 PM

3

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:49:59 PM

13

1276.00

CEUX

GENMAB A/S

08-Apr-2025

16:50:04 PM

36

1275.50

TQEX

GENMAB A/S

08-Apr-2025

16:50:04 PM

68

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:04 PM

10

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:04 PM

6

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:09 PM

28

1275.50

AQEU

GENMAB A/S

08-Apr-2025

16:50:17 PM

67

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:19 PM

23

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:22 PM

38

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:22 PM

16

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:22 PM

14

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:22 PM

38

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:22 PM

7

1275.50

XCSE

131


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:50:22 PM

26

1275.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:22 PM

36

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:22 PM

7

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:22 PM

8

1275.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:23 PM

54

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:23 PM

25

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:23 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:23 PM

15

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:23 PM

8

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:50:23 PM

12

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:50:23 PM

5

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:50:23 PM

11

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:50:23 PM

36

1275.00

CEUX

GENMAB A/S

08-Apr-2025

16:50:23 PM

85

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:23 PM

24

1274.50

AQEU

GENMAB A/S

08-Apr-2025

16:50:27 PM

5

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:27 PM

10

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:27 PM

6

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:31 PM

10

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:31 PM

20

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:32 PM

10

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:32 PM

20

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:50:32 PM

10

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:32 PM

20

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:50:50 PM

49

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:07 PM

9

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:07 PM

12

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:09 PM

40

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

15

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

40

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

18

1275.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

43

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

14

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

14

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

15

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

11

1274.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:09 PM

24

1274.50

TQEX

GENMAB A/S

08-Apr-2025

16:51:09 PM

40

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:09 PM

36

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:09 PM

34

1274.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:09 PM

40

1274.50

AQEU

GENMAB A/S

08-Apr-2025

16:51:27 PM

27

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:27 PM

1

1274.00

XCSE

132


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:51:27 PM

27

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:27 PM

40

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:27 PM

2

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:27 PM

29

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:51:27 PM

87

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:27 PM

36

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:51:27 PM

8

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:51:27 PM

7

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:51:37 PM

57

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:51:47 PM

12

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:47 PM

2

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:51:47 PM

30

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:51:47 PM

2

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:47 PM

44

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:51:57 PM

39

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:51:57 PM

1

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:52:06 PM

13

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:06 PM

13

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:06 PM

13

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:06 PM

13

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:06 PM

11

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:06 PM

1

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:52:06 PM

27

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:52:07 PM

16

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:52:07 PM

22

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:07 PM

19

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:08 PM

13

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:52:10 PM

3

1273.50

XCSE

GENMAB A/S

08-Apr-2025

16:52:14 PM

44

1273.00

AQEU

GENMAB A/S

08-Apr-2025

16:52:15 PM

1

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:15 PM

8

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:15 PM

1

1273.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:20 PM

1

1272.50

TQEX

GENMAB A/S

08-Apr-2025

16:52:20 PM

11

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:20 PM

1

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:21 PM

10

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:21 PM

15

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:23 PM

27

1272.50

CEUX

GENMAB A/S

08-Apr-2025

16:52:26 PM

14

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:52:47 PM

90

1273.00

XCSE

GENMAB A/S

08-Apr-2025

16:53:13 PM

13

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:53:13 PM

16

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:53:13 PM

38

1274.00

XCSE

133


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:53:13 PM

18

1274.00

CEUX

GENMAB A/S

08-Apr-2025

16:53:13 PM

1

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:53:16 PM

13

1274.00

XCSE

GENMAB A/S

08-Apr-2025

16:53:18 PM

42

1273.00

CEUX

GENMAB A/S

08-Apr-2025

16:53:18 PM

2

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:53:18 PM

20

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:53:18 PM

1

1273.50

AQEU

GENMAB A/S

08-Apr-2025

16:53:27 PM

17

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:53:28 PM

15

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:53:28 PM

15

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:53:28 PM

9

1273.50

TQEX

GENMAB A/S

08-Apr-2025

16:53:57 PM

23

1272.50

TQEX

GENMAB A/S

08-Apr-2025

16:53:57 PM

49

1272.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:00 PM

14

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:54:01 PM

32

1272.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

53

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

89

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

90

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

90

1267.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

90

1266.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:01 PM

30

1271.00

TQEX

GENMAB A/S

08-Apr-2025

16:54:01 PM

36

1271.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

86

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

90

1269.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

36

1271.50

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

46

1270.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

64

1268.00

CEUX

GENMAB A/S

08-Apr-2025

16:54:01 PM

10

1272.00

AQEU

GENMAB A/S

08-Apr-2025

16:54:03 PM

40

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:03 PM

32

1270.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:03 PM

90

1269.00

XCSE

GENMAB A/S

08-Apr-2025

16:54:26 PM

40

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:26 PM

28

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:45 PM

35

1270.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

23

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

36

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

16

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

16

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

6

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

26

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

13

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:53 PM

13

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

30

1272.50

XCSE

134


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

08-Apr-2025

16:54:54 PM

15

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

35

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

23

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

10

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

12

1272.50

XCSE

GENMAB A/S

08-Apr-2025

16:54:54 PM

3

1272.50

XCSE

GENMAB A/S

09-Apr-2025

09:30:02 AM

81

1203.00

CEUX

GENMAB A/S

09-Apr-2025

09:30:21 AM

12

1204.00

AQEU

GENMAB A/S

09-Apr-2025

09:30:22 AM

70

1204.00

AQEU

GENMAB A/S

09-Apr-2025

09:30:33 AM

84

1203.50

XCSE

GENMAB A/S

09-Apr-2025

09:30:33 AM

25

1203.50

CEUX

GENMAB A/S

09-Apr-2025

09:30:43 AM

10

1203.00

AQEU

GENMAB A/S

09-Apr-2025

09:30:43 AM

31

1203.00

AQEU

GENMAB A/S

09-Apr-2025

09:30:44 AM

28

1203.00

AQEU

GENMAB A/S

09-Apr-2025

09:30:51 AM

55

1202.50

XCSE

GENMAB A/S

09-Apr-2025

09:30:51 AM

14

1202.50

XCSE

GENMAB A/S

09-Apr-2025

09:30:51 AM

69

1202.50

TQEX

GENMAB A/S

09-Apr-2025

09:30:51 AM

17

1202.50

TQEX

GENMAB A/S

09-Apr-2025

09:30:51 AM

10

1202.50

CEUX

GENMAB A/S

09-Apr-2025

09:30:51 AM

45

1202.50

CEUX

GENMAB A/S

09-Apr-2025

09:30:51 AM

3

1202.50

CEUX

GENMAB A/S

09-Apr-2025

09:30:59 AM

86

1201.50

XCSE

GENMAB A/S

09-Apr-2025

09:30:59 AM

75

1201.50

CEUX

GENMAB A/S

09-Apr-2025

09:30:59 AM

8

1201.50

AQEU

GENMAB A/S

09-Apr-2025

09:30:59 AM

74

1201.50

AQEU

GENMAB A/S

09-Apr-2025

09:31:24 AM

24

1202.00

CEUX

GENMAB A/S

09-Apr-2025

09:31:26 AM

26

1201.50

XCSE

GENMAB A/S

09-Apr-2025

09:31:32 AM

24

1200.00

XCSE

GENMAB A/S

09-Apr-2025

09:31:32 AM

30

1201.00

TQEX

GENMAB A/S

09-Apr-2025

09:31:32 AM

37

1201.00

TQEX

GENMAB A/S

09-Apr-2025

09:31:32 AM

24

1201.00

CEUX

GENMAB A/S

09-Apr-2025

09:31:33 AM

13

1200.00

XCSE

GENMAB A/S

09-Apr-2025

09:31:33 AM

1

1200.00

XCSE

GENMAB A/S

09-Apr-2025

09:31:33 AM

37

1200.00

XCSE

GENMAB A/S

09-Apr-2025

09:31:34 AM

20

1199.50

CEUX

GENMAB A/S

09-Apr-2025

09:31:54 AM

43

1199.50

TQEX

GENMAB A/S

09-Apr-2025

09:31:55 AM

27

1199.00

XCSE

GENMAB A/S

09-Apr-2025

09:32:37 AM

26

1201.00

CEUX

GENMAB A/S

09-Apr-2025

09:33:18 AM

41

1202.50

XCSE

GENMAB A/S

09-Apr-2025

09:33:18 AM

46

1202.50

XCSE

GENMAB A/S

09-Apr-2025

09:35:09 AM

81

1205.50

XCSE

GENMAB A/S

09-Apr-2025

09:35:09 AM

64

1205.50

CEUX

GENMAB A/S

09-Apr-2025

09:35:28 AM

85

1205.50

XCSE

135


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

09:35:28 AM

40

1205.50

CEUX

GENMAB A/S

09-Apr-2025

09:36:49 AM

87

1208.50

XCSE

GENMAB A/S

09-Apr-2025

09:37:50 AM

86

1207.50

XCSE

GENMAB A/S

09-Apr-2025

09:37:50 AM

55

1207.50

CEUX

GENMAB A/S

09-Apr-2025

09:39:35 AM

92

1208.50

XCSE

GENMAB A/S

09-Apr-2025

09:39:55 AM

14

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:39:55 AM

42

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:39:55 AM

5

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

15

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

42

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

14

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

13

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

3

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:41:07 AM

43

1209.50

TQEX

GENMAB A/S

09-Apr-2025

09:41:07 AM

88

1209.50

CEUX

GENMAB A/S

09-Apr-2025

09:41:09 AM

85

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:41:09 AM

16

1210.50

XCSE

GENMAB A/S

09-Apr-2025

09:41:09 AM

8

1210.50

XCSE

GENMAB A/S

09-Apr-2025

09:42:02 AM

79

1211.50

CEUX

GENMAB A/S

09-Apr-2025

09:42:02 AM

3

1211.50

CEUX

GENMAB A/S

09-Apr-2025

09:42:14 AM

27

1212.50

XCSE

GENMAB A/S

09-Apr-2025

09:42:42 AM

42

1213.00

XCSE

GENMAB A/S

09-Apr-2025

09:42:42 AM

4

1213.00

XCSE

GENMAB A/S

09-Apr-2025

09:42:44 AM

25

1212.50

TQEX

GENMAB A/S

09-Apr-2025

09:42:53 AM

88

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:42:55 AM

25

1211.50

CEUX

GENMAB A/S

09-Apr-2025

09:42:55 AM

63

1211.50

CEUX

GENMAB A/S

09-Apr-2025

09:43:04 AM

47

1211.00

XCSE

GENMAB A/S

09-Apr-2025

09:43:04 AM

38

1211.00

XCSE

GENMAB A/S

09-Apr-2025

09:43:04 AM

53

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:43:04 AM

31

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:43:04 AM

81

1210.50

CEUX

GENMAB A/S

09-Apr-2025

09:43:11 AM

84

1209.50

CEUX

GENMAB A/S

09-Apr-2025

09:43:18 AM

81

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:44:17 AM

24

1209.50

TQEX

GENMAB A/S

09-Apr-2025

09:45:01 AM

78

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:45:01 AM

22

1209.00

CEUX

GENMAB A/S

09-Apr-2025

09:45:01 AM

2

1209.00

CEUX

GENMAB A/S

09-Apr-2025

09:47:01 AM

82

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:47:01 AM

24

1209.00

TQEX

GENMAB A/S

09-Apr-2025

09:47:01 AM

75

1209.00

CEUX

GENMAB A/S

09-Apr-2025

09:47:34 AM

53

1211.00

CEUX

GENMAB A/S

09-Apr-2025

09:48:05 AM

26

1210.50

TQEX

136


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

09:48:15 AM

85

1210.00

XCSE

GENMAB A/S

09-Apr-2025

09:48:15 AM

5

1210.00

CEUX

GENMAB A/S

09-Apr-2025

09:48:15 AM

39

1210.00

CEUX

GENMAB A/S

09-Apr-2025

09:48:31 AM

24

1209.50

TQEX

GENMAB A/S

09-Apr-2025

09:48:55 AM

12

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:49:15 AM

12

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:49:15 AM

12

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:49:22 AM

12

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:49:22 AM

14

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:49:22 AM

10

1209.50

XCSE

GENMAB A/S

09-Apr-2025

09:49:27 AM

69

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:49:27 AM

56

1209.00

CEUX

GENMAB A/S

09-Apr-2025

09:49:28 AM

12

1208.50

CEUX

GENMAB A/S

09-Apr-2025

09:50:00 AM

81

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:50:08 AM

83

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:50:19 AM

85

1209.00

XCSE

GENMAB A/S

09-Apr-2025

09:50:21 AM

8

1208.50

CEUX

GENMAB A/S

09-Apr-2025

09:50:21 AM

21

1208.50

CEUX

GENMAB A/S

09-Apr-2025

09:50:31 AM

88

1208.00

XCSE

GENMAB A/S

09-Apr-2025

09:52:21 AM

49

1207.50

CEUX

GENMAB A/S

09-Apr-2025

09:53:21 AM

8

1207.50

XCSE

GENMAB A/S

09-Apr-2025

09:53:21 AM

79

1207.50

XCSE

GENMAB A/S

09-Apr-2025

09:53:21 AM

63

1207.50

CEUX

GENMAB A/S

09-Apr-2025

09:53:36 AM

8

1206.50

XCSE

GENMAB A/S

09-Apr-2025

09:53:36 AM

76

1206.50

XCSE

GENMAB A/S

09-Apr-2025

09:54:27 AM

26

1206.00

CEUX

GENMAB A/S

09-Apr-2025

09:54:53 AM

44

1208.50

CEUX

GENMAB A/S

09-Apr-2025

09:56:29 AM

24

1211.00

TQEX

GENMAB A/S

09-Apr-2025

09:56:49 AM

15

1210.50

XCSE

GENMAB A/S

09-Apr-2025

09:56:49 AM

50

1210.50

XCSE

GENMAB A/S

09-Apr-2025

09:56:49 AM

20

1210.50

CEUX

GENMAB A/S

09-Apr-2025

09:57:12 AM

15

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:12 AM

42

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:12 AM

14

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:42 AM

42

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:42 AM

36

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:42 AM

15

1212.00

XCSE

GENMAB A/S

09-Apr-2025

09:57:43 AM

82

1211.50

CEUX

GENMAB A/S

09-Apr-2025

09:58:57 AM

15

1211.00

TQEX

GENMAB A/S

09-Apr-2025

09:58:57 AM

16

1211.00

TQEX

GENMAB A/S

09-Apr-2025

09:59:00 AM

10

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:00 AM

14

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:00 AM

14

1211.50

XCSE

137


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

09:59:00 AM

12

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:00 AM

42

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:00 AM

13

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:00 AM

5

1211.50

XCSE

GENMAB A/S

09-Apr-2025

09:59:59 AM

3

1211.50

XCSE

GENMAB A/S

09-Apr-2025

10:00:06 AM

15

1212.00

CEUX

GENMAB A/S

09-Apr-2025

10:00:08 AM

25

1212.00

TQEX

GENMAB A/S

09-Apr-2025

10:00:08 AM

68

1212.00

CEUX

GENMAB A/S

09-Apr-2025

10:00:13 AM

83

1211.50

XCSE

GENMAB A/S

09-Apr-2025

10:00:13 AM

45

1212.00

XCSE

GENMAB A/S

09-Apr-2025

10:00:13 AM

19

1212.00

XCSE

GENMAB A/S

09-Apr-2025

10:00:13 AM

28

1212.00

XCSE

GENMAB A/S

09-Apr-2025

10:00:20 AM

29

1211.00

TQEX

GENMAB A/S

09-Apr-2025

10:00:33 AM

16

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:00:33 AM

5

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:00:33 AM

54

1210.50

CEUX

GENMAB A/S

09-Apr-2025

10:02:02 AM

12

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:02:02 AM

12

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:02:02 AM

13

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:02:02 AM

42

1210.50

XCSE

GENMAB A/S

09-Apr-2025

10:02:05 AM

83

1209.50

XCSE

GENMAB A/S

09-Apr-2025

10:02:05 AM

14

1209.50

TQEX

GENMAB A/S

09-Apr-2025

10:02:05 AM

29

1209.50

CEUX

GENMAB A/S

09-Apr-2025

10:02:05 AM

23

1209.50

CEUX

GENMAB A/S

09-Apr-2025

10:02:09 AM

12

1209.50

TQEX

GENMAB A/S

09-Apr-2025

10:02:51 AM

24

1210.50

TQEX

GENMAB A/S

09-Apr-2025

10:03:32 AM

11

1211.50

XCSE

GENMAB A/S

09-Apr-2025

10:03:32 AM

19

1211.50

XCSE

GENMAB A/S

09-Apr-2025

10:03:36 AM

88

1211.00

XCSE

GENMAB A/S

09-Apr-2025

10:03:42 AM

54

1210.50

CEUX

GENMAB A/S

09-Apr-2025

10:03:42 AM

26

1210.50

CEUX

GENMAB A/S

09-Apr-2025

10:03:45 AM

84

1210.00

XCSE

GENMAB A/S

09-Apr-2025

10:04:05 AM

24

1209.50

TQEX

GENMAB A/S

09-Apr-2025

10:04:05 AM

3

1209.50

CEUX

GENMAB A/S

09-Apr-2025

10:04:05 AM

83

1209.50

CEUX

GENMAB A/S

09-Apr-2025

10:04:06 AM

84

1209.00

XCSE

GENMAB A/S

09-Apr-2025

10:04:08 AM

62

1208.50

CEUX

GENMAB A/S

09-Apr-2025

10:04:12 AM

5

1207.50

XCSE

GENMAB A/S

09-Apr-2025

10:04:12 AM

79

1207.50

XCSE

GENMAB A/S

09-Apr-2025

10:04:12 AM

62

1207.00

CEUX

GENMAB A/S

09-Apr-2025

10:04:28 AM

82

1206.00

XCSE

GENMAB A/S

09-Apr-2025

10:04:41 AM

25

1207.00

XCSE

GENMAB A/S

09-Apr-2025

10:04:44 AM

35

1206.00

XCSE

138


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

10:04:53 AM

2

1205.50

CEUX

GENMAB A/S

09-Apr-2025

10:05:02 AM

25

1205.50

CEUX

GENMAB A/S

09-Apr-2025

10:05:04 AM

85

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:05:04 AM

7

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:05:04 AM

18

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:05:04 AM

30

1204.50

CEUX

GENMAB A/S

09-Apr-2025

10:06:35 AM

30

1202.50

CEUX

GENMAB A/S

09-Apr-2025

10:06:41 AM

56

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:06:41 AM

26

1202.50

TQEX

GENMAB A/S

09-Apr-2025

10:06:48 AM

24

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:06:50 AM

16

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:06:50 AM

13

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:07:48 AM

51

1202.00

XCSE

GENMAB A/S

09-Apr-2025

10:08:03 AM

24

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:10:41 AM

87

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:10:41 AM

25

1202.50

TQEX

GENMAB A/S

09-Apr-2025

10:10:41 AM

58

1202.50

CEUX

GENMAB A/S

09-Apr-2025

10:11:59 AM

75

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:11:59 AM

35

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:11:59 AM

3

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:12:50 AM

88

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:12:50 AM

62

1202.50

CEUX

GENMAB A/S

09-Apr-2025

10:12:55 AM

24

1202.00

TQEX

GENMAB A/S

09-Apr-2025

10:13:01 AM

82

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:13:01 AM

61

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:14:09 AM

68

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:14:09 AM

13

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:14:09 AM

25

1201.50

TQEX

GENMAB A/S

09-Apr-2025

10:14:09 AM

53

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:15:27 AM

12

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:16:02 AM

34

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:02 AM

19

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:41 AM

19

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:41 AM

42

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:41 AM

36

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:42 AM

17

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:42 AM

64

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:16:42 AM

49

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:17:27 AM

16

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:17:27 AM

43

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:17:29 AM

26

1200.50

CEUX

GENMAB A/S

09-Apr-2025

10:18:13 AM

74

1200.50

CEUX

GENMAB A/S

09-Apr-2025

10:18:14 AM

81

1199.50

XCSE

139


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

10:18:14 AM

53

1199.00

CEUX

GENMAB A/S

09-Apr-2025

10:18:34 AM

24

1198.50

CEUX

GENMAB A/S

09-Apr-2025

10:19:40 AM

25

1198.50

CEUX

GENMAB A/S

09-Apr-2025

10:20:04 AM

42

1199.50

XCSE

GENMAB A/S

09-Apr-2025

10:20:04 AM

30

1199.50

XCSE

GENMAB A/S

09-Apr-2025

10:20:07 AM

8

1199.00

XCSE

GENMAB A/S

09-Apr-2025

10:20:09 AM

25

1199.50

TQEX

GENMAB A/S

09-Apr-2025

10:20:37 AM

43

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:21:03 AM

14

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:21:05 AM

85

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:21:05 AM

36

1200.50

CEUX

GENMAB A/S

09-Apr-2025

10:22:03 AM

86

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:22:03 AM

52

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:22:03 AM

7

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:22:23 AM

24

1201.50

TQEX

GENMAB A/S

09-Apr-2025

10:23:22 AM

3

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:23:22 AM

6

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:23:22 AM

13

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:23:22 AM

42

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:23:22 AM

46

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:23:56 AM

88

1200.00

XCSE

GENMAB A/S

09-Apr-2025

10:23:56 AM

57

1200.00

CEUX

GENMAB A/S

09-Apr-2025

10:24:16 AM

74

1199.00

XCSE

GENMAB A/S

09-Apr-2025

10:24:16 AM

43

1199.00

CEUX

GENMAB A/S

09-Apr-2025

10:24:23 AM

26

1199.50

AQEU

GENMAB A/S

09-Apr-2025

10:25:32 AM

2

1202.00

TQEX

GENMAB A/S

09-Apr-2025

10:26:51 AM

64

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:26:51 AM

70

1202.50

CEUX

GENMAB A/S

09-Apr-2025

10:27:03 AM

3

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:27:04 AM

12

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:27:27 AM

12

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:27:27 AM

34

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:27:31 AM

82

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:27:38 AM

29

1202.00

AQEU

GENMAB A/S

09-Apr-2025

10:27:38 AM

22

1202.00

TQEX

GENMAB A/S

09-Apr-2025

10:27:42 AM

49

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:27:45 AM

83

1201.00

XCSE

GENMAB A/S

09-Apr-2025

10:27:45 AM

35

1200.50

AQEU

GENMAB A/S

09-Apr-2025

10:27:45 AM

24

1201.00

TQEX

GENMAB A/S

09-Apr-2025

10:27:45 AM

55

1200.50

CEUX

GENMAB A/S

09-Apr-2025

10:30:11 AM

83

1200.00

XCSE

GENMAB A/S

09-Apr-2025

10:30:15 AM

49

1199.00

XCSE

GENMAB A/S

09-Apr-2025

10:30:15 AM

39

1199.00

XCSE

140


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

10:30:15 AM

52

1199.00

CEUX

GENMAB A/S

09-Apr-2025

10:30:20 AM

5

1199.00

CEUX

GENMAB A/S

09-Apr-2025

10:31:01 AM

84

1198.50

XCSE

GENMAB A/S

09-Apr-2025

10:31:38 AM

17

1198.00

CEUX

GENMAB A/S

09-Apr-2025

10:31:38 AM

17

1198.00

CEUX

GENMAB A/S

09-Apr-2025

10:33:09 AM

82

1197.50

XCSE

GENMAB A/S

09-Apr-2025

10:33:09 AM

24

1197.50

TQEX

GENMAB A/S

09-Apr-2025

10:33:13 AM

6

1196.50

CEUX

GENMAB A/S

09-Apr-2025

10:33:20 AM

83

1196.50

XCSE

GENMAB A/S

09-Apr-2025

10:33:20 AM

26

1196.50

CEUX

GENMAB A/S

09-Apr-2025

10:34:11 AM

76

1197.00

XCSE

GENMAB A/S

09-Apr-2025

10:34:11 AM

1

1197.00

XCSE

GENMAB A/S

09-Apr-2025

10:34:11 AM

5

1197.00

XCSE

GENMAB A/S

09-Apr-2025

10:34:11 AM

24

1197.00

AQEU

GENMAB A/S

09-Apr-2025

10:35:07 AM

85

1197.00

XCSE

GENMAB A/S

09-Apr-2025

10:35:07 AM

16

1196.50

CEUX

GENMAB A/S

09-Apr-2025

10:35:07 AM

56

1196.50

CEUX

GENMAB A/S

09-Apr-2025

10:37:22 AM

24

1202.00

XCSE

GENMAB A/S

09-Apr-2025

10:37:47 AM

35

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:38:23 AM

85

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:38:23 AM

28

1204.50

TQEX

GENMAB A/S

09-Apr-2025

10:38:28 AM

86

1204.00

CEUX

GENMAB A/S

09-Apr-2025

10:39:38 AM

12

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:39:38 AM

12

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:39:38 AM

52

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:39:48 AM

30

1204.00

CEUX

GENMAB A/S

09-Apr-2025

10:40:48 AM

16

1204.50

TQEX

GENMAB A/S

09-Apr-2025

10:41:29 AM

81

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

42

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

12

1205.00

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

42

1205.50

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

14

1205.50

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

88

1204.00

XCSE

GENMAB A/S

09-Apr-2025

10:41:29 AM

9

1204.50

TQEX

GENMAB A/S

09-Apr-2025

10:41:29 AM

32

1203.50

TQEX

GENMAB A/S

09-Apr-2025

10:41:29 AM

86

1205.00

CEUX

GENMAB A/S

09-Apr-2025

10:41:29 AM

46

1204.00

CEUX

GENMAB A/S

09-Apr-2025

10:41:30 AM

10

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:42:14 AM

10

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:42:14 AM

66

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:42:14 AM

82

1203.00

CEUX

GENMAB A/S

09-Apr-2025

10:42:16 AM

87

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:42:16 AM

26

1202.00

CEUX

141


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

10:42:16 AM

54

1202.00

CEUX

GENMAB A/S

09-Apr-2025

10:42:30 AM

30

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:42:30 AM

57

1200.50

XCSE

GENMAB A/S

09-Apr-2025

10:42:30 AM

44

1200.50

CEUX

GENMAB A/S

09-Apr-2025

10:43:01 AM

27

1199.50

XCSE

GENMAB A/S

09-Apr-2025

10:43:01 AM

60

1199.50

XCSE

GENMAB A/S

09-Apr-2025

10:43:01 AM

26

1199.50

CEUX

GENMAB A/S

09-Apr-2025

10:45:47 AM

26

1203.50

AQEU

GENMAB A/S

09-Apr-2025

10:45:47 AM

1

1203.50

AQEU

GENMAB A/S

09-Apr-2025

10:45:47 AM

28

1203.50

TQEX

GENMAB A/S

09-Apr-2025

10:46:12 AM

64

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:46:13 AM

28

1202.50

CEUX

GENMAB A/S

09-Apr-2025

10:47:22 AM

87

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:47:22 AM

17

1203.50

TQEX

GENMAB A/S

09-Apr-2025

10:47:22 AM

12

1203.50

TQEX

GENMAB A/S

09-Apr-2025

10:47:22 AM

45

1203.00

CEUX

GENMAB A/S

09-Apr-2025

10:49:30 AM

6

1204.00

XCSE

GENMAB A/S

09-Apr-2025

10:49:30 AM

75

1204.00

XCSE

GENMAB A/S

09-Apr-2025

10:49:55 AM

22

1203.00

CEUX

GENMAB A/S

09-Apr-2025

10:50:02 AM

87

1203.00

XCSE

GENMAB A/S

09-Apr-2025

10:50:02 AM

35

1203.00

CEUX

GENMAB A/S

09-Apr-2025

10:51:35 AM

58

1202.00

XCSE

GENMAB A/S

09-Apr-2025

10:52:28 AM

25

1201.50

TQEX

GENMAB A/S

09-Apr-2025

10:52:28 AM

25

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:53:52 AM

2

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:53:52 AM

6

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:53:52 AM

3

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:53:52 AM

3

1201.50

XCSE

GENMAB A/S

09-Apr-2025

10:54:24 AM

84

1201.50

CEUX

GENMAB A/S

09-Apr-2025

10:55:19 AM

17

1202.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

47

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

30

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

21

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

12

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

19

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

42

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:56:12 AM

24

1203.00

TQEX

GENMAB A/S

09-Apr-2025

10:56:12 AM

87

1203.00

CEUX

GENMAB A/S

09-Apr-2025

10:56:52 AM

86

1203.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

13

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

12

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

14

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

42

1204.50

XCSE

142


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

10:59:42 AM

14

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

12

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

14

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:42 AM

42

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:43 AM

13

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:52 AM

13

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:52 AM

13

1204.50

XCSE

GENMAB A/S

09-Apr-2025

10:59:52 AM

8

1204.50

XCSE

GENMAB A/S

09-Apr-2025

11:00:07 AM

24

1204.50

TQEX

GENMAB A/S

09-Apr-2025

11:01:01 AM

86

1204.00

XCSE

GENMAB A/S

09-Apr-2025

11:01:01 AM

25

1203.50

TQEX

GENMAB A/S

09-Apr-2025

11:01:01 AM

85

1204.00

CEUX

GENMAB A/S

09-Apr-2025

11:01:03 AM

87

1203.50

XCSE

GENMAB A/S

09-Apr-2025

11:02:49 AM

14

1204.00

XCSE

GENMAB A/S

09-Apr-2025

11:02:49 AM

10

1204.00

XCSE

GENMAB A/S

09-Apr-2025

11:03:09 AM

85

1203.50

XCSE

GENMAB A/S

09-Apr-2025

11:03:09 AM

27

1204.00

XCSE

GENMAB A/S

09-Apr-2025

11:04:01 AM

25

1203.00

AQEU

GENMAB A/S

09-Apr-2025

11:04:01 AM

75

1203.00

CEUX

GENMAB A/S

09-Apr-2025

11:04:53 AM

13

1203.50

XCSE

GENMAB A/S

09-Apr-2025

11:04:53 AM

42

1203.50

XCSE

GENMAB A/S

09-Apr-2025

11:04:53 AM

8

1203.50

XCSE

GENMAB A/S

09-Apr-2025

11:05:16 AM

58

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:05:16 AM

25

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:05:42 AM

85

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:06:37 AM

86

1203.00

CEUX

GENMAB A/S

09-Apr-2025

11:06:38 AM

88

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:07:42 AM

18

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:08:30 AM

25

1202.00

TQEX

GENMAB A/S

09-Apr-2025

11:08:30 AM

60

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:09:02 AM

46

1202.00

XCSE

GENMAB A/S

09-Apr-2025

11:09:02 AM

64

1202.00

XCSE

GENMAB A/S

09-Apr-2025

11:09:18 AM

23

1201.50

XCSE

GENMAB A/S

09-Apr-2025

11:09:18 AM

63

1201.50

XCSE

GENMAB A/S

09-Apr-2025

11:09:57 AM

2

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:09:57 AM

79

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:10:09 AM

19

1203.00

XCSE

GENMAB A/S

09-Apr-2025

11:10:09 AM

68

1203.00

XCSE

GENMAB A/S

09-Apr-2025

11:10:09 AM

78

1203.00

CEUX

GENMAB A/S

09-Apr-2025

11:10:09 AM

10

1203.00

CEUX

GENMAB A/S

09-Apr-2025

11:11:51 AM

81

1203.50

CEUX

GENMAB A/S

09-Apr-2025

11:11:52 AM

76

1203.00

XCSE

GENMAB A/S

09-Apr-2025

11:11:54 AM

24

1203.00

TQEX

143


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

11:12:13 AM

32

1202.00

XCSE

GENMAB A/S

09-Apr-2025

11:12:13 AM

52

1202.00

XCSE

GENMAB A/S

09-Apr-2025

11:12:13 AM

87

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:12:16 AM

64

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:12:25 AM

36

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:12:53 AM

42

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:12:53 AM

20

1202.50

AQEU

GENMAB A/S

09-Apr-2025

11:12:53 AM

7

1202.50

AQEU

GENMAB A/S

09-Apr-2025

11:12:53 AM

58

1203.00

CEUX

GENMAB A/S

09-Apr-2025

11:12:58 AM

53

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:13:04 AM

35

1201.50

XCSE

GENMAB A/S

09-Apr-2025

11:13:06 AM

34

1201.00

CEUX

GENMAB A/S

09-Apr-2025

11:13:07 AM

41

1201.00

CEUX

GENMAB A/S

09-Apr-2025

11:15:05 AM

77

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:15:05 AM

24

1202.50

TQEX

GENMAB A/S

09-Apr-2025

11:15:05 AM

31

1202.50

CEUX

GENMAB A/S

09-Apr-2025

11:15:49 AM

32

1202.50

CEUX

GENMAB A/S

09-Apr-2025

11:15:50 AM

30

1202.50

CEUX

GENMAB A/S

09-Apr-2025

11:16:03 AM

27

1202.00

AQEU

GENMAB A/S

09-Apr-2025

11:17:26 AM

30

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:17:26 AM

51

1202.50

XCSE

GENMAB A/S

09-Apr-2025

11:18:05 AM

24

1202.00

CEUX

GENMAB A/S

09-Apr-2025

11:18:51 AM

74

1201.50

XCSE

GENMAB A/S

09-Apr-2025

11:18:53 AM

24

1201.00

TQEX

GENMAB A/S

09-Apr-2025

11:19:36 AM

44

1201.50

CEUX

GENMAB A/S

09-Apr-2025

11:19:57 AM

24

1200.50

XCSE

GENMAB A/S

09-Apr-2025

11:19:57 AM

60

1200.50

XCSE

GENMAB A/S

09-Apr-2025

11:19:57 AM

28

1200.50

CEUX

GENMAB A/S

09-Apr-2025

11:20:53 AM

24

1201.00

TQEX

GENMAB A/S

09-Apr-2025

11:21:26 AM

84

1201.00

XCSE

GENMAB A/S

09-Apr-2025

11:21:53 AM

88

1200.00

XCSE

GENMAB A/S

09-Apr-2025

11:21:53 AM

30

1200.00

CEUX

GENMAB A/S

09-Apr-2025

11:22:45 AM

45

1201.00

CEUX

GENMAB A/S

09-Apr-2025

11:23:27 AM

81

1200.50

XCSE

GENMAB A/S

09-Apr-2025

11:23:34 AM

39

1200.00

CEUX

GENMAB A/S

09-Apr-2025

11:25:00 AM

75

1199.00

XCSE

GENMAB A/S

09-Apr-2025

11:25:00 AM

29

1199.00

CEUX

GENMAB A/S

09-Apr-2025

11:25:16 AM

24

1198.50

TQEX

GENMAB A/S

09-Apr-2025

11:25:35 AM

6

1198.00

XCSE

GENMAB A/S

09-Apr-2025

11:25:35 AM

76

1198.00

XCSE

GENMAB A/S

09-Apr-2025

11:25:56 AM

28

1197.50

CEUX

GENMAB A/S

09-Apr-2025

11:28:30 AM

53

1198.50

CEUX

GENMAB A/S

09-Apr-2025

11:28:36 AM

81

1198.00

XCSE

144


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

11:28:39 AM

24

1197.50

TQEX

GENMAB A/S

09-Apr-2025

11:28:39 AM

9

1197.50

CEUX

GENMAB A/S

09-Apr-2025

11:28:39 AM

41

1197.50

CEUX

GENMAB A/S

09-Apr-2025

11:29:13 AM

78

1197.00

XCSE

GENMAB A/S

09-Apr-2025

11:29:14 AM

25

1196.50

CEUX

GENMAB A/S

09-Apr-2025

11:29:33 AM

85

1196.50

XCSE

GENMAB A/S

09-Apr-2025

11:29:33 AM

29

1196.50

CEUX

GENMAB A/S

09-Apr-2025

11:33:06 AM

13

1197.50

XCSE

GENMAB A/S

09-Apr-2025

11:33:06 AM

36

1197.50

XCSE

GENMAB A/S

09-Apr-2025

11:33:09 AM

1

1197.50

XCSE

GENMAB A/S

09-Apr-2025

11:33:25 AM

87

1197.50

XCSE

GENMAB A/S

09-Apr-2025

11:33:25 AM

70

1197.50

CEUX

GENMAB A/S

09-Apr-2025

11:33:26 AM

81

1196.50

XCSE

GENMAB A/S

09-Apr-2025

11:33:26 AM

29

1196.50

CEUX

GENMAB A/S

09-Apr-2025

11:33:39 AM

24

1196.00

TQEX

GENMAB A/S

09-Apr-2025

11:33:48 AM

82

1195.50

XCSE

GENMAB A/S

09-Apr-2025

11:35:06 AM

45

1195.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:12 AM

84

1194.50

XCSE

GENMAB A/S

09-Apr-2025

11:35:14 AM

15

1194.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:14 AM

8

1194.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:14 AM

2

1194.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:41 AM

42

1194.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

13

1194.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

33

1194.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

17

1193.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

23

1193.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

47

1193.00

XCSE

GENMAB A/S

09-Apr-2025

11:35:41 AM

24

1193.50

TQEX

GENMAB A/S

09-Apr-2025

11:35:41 AM

24

1193.50

AQEU

GENMAB A/S

09-Apr-2025

11:35:41 AM

24

1193.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:41 AM

9

1193.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:41 AM

17

1193.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:45 AM

1

1192.00

CEUX

GENMAB A/S

09-Apr-2025

11:35:57 AM

29

1192.00

CEUX

GENMAB A/S

09-Apr-2025

11:37:43 AM

67

1191.50

XCSE

GENMAB A/S

09-Apr-2025

11:38:03 AM

25

1190.50

CEUX

GENMAB A/S

09-Apr-2025

11:38:05 AM

36

1190.00

XCSE

GENMAB A/S

09-Apr-2025

11:38:43 AM

31

1190.50

CEUX

GENMAB A/S

09-Apr-2025

11:39:06 AM

13

1189.50

XCSE

GENMAB A/S

09-Apr-2025

11:39:06 AM

57

1189.50

XCSE

GENMAB A/S

09-Apr-2025

11:39:22 AM

33

1190.50

CEUX

GENMAB A/S

09-Apr-2025

11:39:30 AM

24

1190.00

TQEX

GENMAB A/S

09-Apr-2025

11:42:25 AM

86

1190.50

XCSE

145


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

11:42:25 AM

12

1190.50

CEUX

GENMAB A/S

09-Apr-2025

11:42:25 AM

40

1190.50

CEUX

GENMAB A/S

09-Apr-2025

11:42:59 AM

56

1189.50

XCSE

GENMAB A/S

09-Apr-2025

11:42:59 AM

25

1189.50

CEUX

GENMAB A/S

09-Apr-2025

11:43:45 AM

38

1190.00

CEUX

GENMAB A/S

09-Apr-2025

11:44:48 AM

86

1189.50

XCSE

GENMAB A/S

09-Apr-2025

11:45:41 AM

14

1188.50

CEUX

GENMAB A/S

09-Apr-2025

11:45:43 AM

25

1188.50

XCSE

GENMAB A/S

09-Apr-2025

11:45:43 AM

24

1188.50

TQEX

GENMAB A/S

09-Apr-2025

11:45:43 AM

11

1188.50

CEUX

GENMAB A/S

09-Apr-2025

11:45:51 AM

81

1187.50

XCSE

GENMAB A/S

09-Apr-2025

11:45:51 AM

35

1187.00

CEUX

GENMAB A/S

09-Apr-2025

11:46:56 AM

85

1187.50

XCSE

GENMAB A/S

09-Apr-2025

11:46:56 AM

39

1188.00

CEUX

GENMAB A/S

09-Apr-2025

11:47:05 AM

34

1187.00

CEUX

GENMAB A/S

09-Apr-2025

11:49:45 AM

38

1188.00

AQEU

GENMAB A/S

09-Apr-2025

11:49:45 AM

43

1188.00

CEUX

GENMAB A/S

09-Apr-2025

11:49:53 AM

87

1187.50

XCSE

GENMAB A/S

09-Apr-2025

11:49:53 AM

24

1187.50

TQEX

GENMAB A/S

09-Apr-2025

11:50:35 AM

87

1186.50

XCSE

GENMAB A/S

09-Apr-2025

11:50:35 AM

27

1187.00

CEUX

GENMAB A/S

09-Apr-2025

11:51:48 AM

18

1187.50

TQEX

GENMAB A/S

09-Apr-2025

11:51:48 AM

44

1187.50

CEUX

GENMAB A/S

09-Apr-2025

11:52:59 AM

6

1187.50

TQEX

GENMAB A/S

09-Apr-2025

11:53:01 AM

86

1186.50

XCSE

GENMAB A/S

09-Apr-2025

11:53:01 AM

24

1186.50

AQEU

GENMAB A/S

09-Apr-2025

11:53:01 AM

35

1186.50

CEUX

GENMAB A/S

09-Apr-2025

11:55:56 AM

14

1186.50

XCSE

GENMAB A/S

09-Apr-2025

11:55:56 AM

18

1186.50

XCSE

GENMAB A/S

09-Apr-2025

11:56:10 AM

88

1185.50

XCSE

GENMAB A/S

09-Apr-2025

11:56:10 AM

32

1186.00

XCSE

GENMAB A/S

09-Apr-2025

11:56:10 AM

34

1185.50

CEUX

GENMAB A/S

09-Apr-2025

11:58:33 AM

42

1188.50

XCSE

GENMAB A/S

09-Apr-2025

11:58:33 AM

5

1188.50

XCSE

GENMAB A/S

09-Apr-2025

11:58:33 AM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

11:58:33 AM

20

1188.50

XCSE

GENMAB A/S

09-Apr-2025

11:59:42 AM

43

1189.00

XCSE

GENMAB A/S

09-Apr-2025

11:59:42 AM

42

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:00:19 PM

88

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:00:52 PM

85

1189.50

CEUX

GENMAB A/S

09-Apr-2025

12:00:52 PM

3

1189.50

CEUX

GENMAB A/S

09-Apr-2025

12:02:23 PM

84

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:02:23 PM

27

1189.50

XCSE

146


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

12:02:23 PM

31

1189.00

TQEX

GENMAB A/S

09-Apr-2025

12:02:23 PM

24

1189.00

AQEU

GENMAB A/S

09-Apr-2025

12:03:37 PM

85

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:03:37 PM

31

1189.00

TQEX

GENMAB A/S

09-Apr-2025

12:03:37 PM

40

1189.00

AQEU

GENMAB A/S

09-Apr-2025

12:04:54 PM

85

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:05:12 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

12:05:12 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

12:05:12 PM

2

1188.50

XCSE

GENMAB A/S

09-Apr-2025

12:05:14 PM

84

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:05:14 PM

34

1188.00

TQEX

GENMAB A/S

09-Apr-2025

12:06:04 PM

71

1187.50

CEUX

GENMAB A/S

09-Apr-2025

12:07:32 PM

4

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:07:32 PM

2

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:07:32 PM

47

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:07:32 PM

4

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:08:32 PM

87

1191.00

CEUX

GENMAB A/S

09-Apr-2025

12:09:03 PM

42

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:09:03 PM

13

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:09:03 PM

1

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:09:03 PM

13

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:09:03 PM

36

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:10:25 PM

88

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:10:25 PM

82

1192.00

CEUX

GENMAB A/S

09-Apr-2025

12:11:49 PM

86

1192.50

XCSE

GENMAB A/S

09-Apr-2025

12:13:25 PM

6

1193.50

XCSE

GENMAB A/S

09-Apr-2025

12:13:25 PM

17

1193.50

XCSE

GENMAB A/S

09-Apr-2025

12:13:25 PM

24

1193.50

TQEX

GENMAB A/S

09-Apr-2025

12:13:44 PM

35

1194.00

XCSE

GENMAB A/S

09-Apr-2025

12:14:07 PM

81

1194.00

XCSE

GENMAB A/S

09-Apr-2025

12:14:07 PM

83

1194.00

CEUX

GENMAB A/S

09-Apr-2025

12:15:04 PM

83

1194.50

XCSE

GENMAB A/S

09-Apr-2025

12:15:04 PM

36

1195.00

XCSE

GENMAB A/S

09-Apr-2025

12:15:04 PM

76

1194.50

CEUX

GENMAB A/S

09-Apr-2025

12:15:35 PM

10

1194.00

AQEU

GENMAB A/S

09-Apr-2025

12:15:35 PM

17

1194.00

AQEU

GENMAB A/S

09-Apr-2025

12:19:26 PM

6

1195.50

TQEX

GENMAB A/S

09-Apr-2025

12:19:26 PM

28

1195.50

TQEX

GENMAB A/S

09-Apr-2025

12:19:26 PM

88

1195.50

CEUX

GENMAB A/S

09-Apr-2025

12:19:27 PM

14

1195.50

XCSE

GENMAB A/S

09-Apr-2025

12:19:27 PM

15

1195.50

XCSE

GENMAB A/S

09-Apr-2025

12:19:47 PM

82

1195.00

XCSE

GENMAB A/S

09-Apr-2025

12:19:47 PM

50

1195.00

XCSE

147


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

12:19:47 PM

15

1195.00

XCSE

GENMAB A/S

09-Apr-2025

12:19:47 PM

45

1195.50

XCSE

GENMAB A/S

09-Apr-2025

12:19:51 PM

24

1194.50

TQEX

GENMAB A/S

09-Apr-2025

12:20:03 PM

82

1194.00

XCSE

GENMAB A/S

09-Apr-2025

12:20:03 PM

77

1194.00

CEUX

GENMAB A/S

09-Apr-2025

12:20:15 PM

84

1193.00

XCSE

GENMAB A/S

09-Apr-2025

12:20:15 PM

81

1193.00

CEUX

GENMAB A/S

09-Apr-2025

12:20:36 PM

6

1192.00

CEUX

GENMAB A/S

09-Apr-2025

12:20:36 PM

37

1192.00

CEUX

GENMAB A/S

09-Apr-2025

12:21:49 PM

82

1191.50

XCSE

GENMAB A/S

09-Apr-2025

12:21:49 PM

24

1191.50

AQEU

GENMAB A/S

09-Apr-2025

12:21:50 PM

24

1190.50

CEUX

GENMAB A/S

09-Apr-2025

12:22:43 PM

82

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:23:31 PM

27

1190.50

CEUX

GENMAB A/S

09-Apr-2025

12:25:22 PM

81

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:25:45 PM

85

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:25:45 PM

44

1190.00

CEUX

GENMAB A/S

09-Apr-2025

12:25:48 PM

88

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:25:48 PM

25

1189.00

TQEX

GENMAB A/S

09-Apr-2025

12:25:48 PM

17

1189.00

CEUX

GENMAB A/S

09-Apr-2025

12:25:48 PM

8

1189.00

CEUX

GENMAB A/S

09-Apr-2025

12:27:28 PM

3

1192.00

CEUX

GENMAB A/S

09-Apr-2025

12:27:32 PM

36

1192.00

CEUX

GENMAB A/S

09-Apr-2025

12:28:38 PM

3

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:29:17 PM

66

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:29:17 PM

25

1191.00

CEUX

GENMAB A/S

09-Apr-2025

12:30:06 PM

5

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:30:29 PM

20

1191.00

CEUX

GENMAB A/S

09-Apr-2025

12:30:44 PM

60

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:30:44 PM

26

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:30:44 PM

25

1191.00

CEUX

GENMAB A/S

09-Apr-2025

12:30:46 PM

32

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:30:46 PM

28

1190.50

TQEX

GENMAB A/S

09-Apr-2025

12:30:46 PM

33

1190.00

CEUX

GENMAB A/S

09-Apr-2025

12:30:48 PM

4

1189.50

AQEU

GENMAB A/S

09-Apr-2025

12:30:48 PM

1

1189.50

AQEU

GENMAB A/S

09-Apr-2025

12:30:48 PM

24

1189.50

AQEU

GENMAB A/S

09-Apr-2025

12:30:50 PM

34

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:30:50 PM

33

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:32:19 PM

26

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:33:25 PM

37

1188.00

CEUX

GENMAB A/S

09-Apr-2025

12:33:27 PM

84

1187.50

XCSE

GENMAB A/S

09-Apr-2025

12:33:27 PM

24

1187.50

AQEU

148


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

12:33:30 PM

24

1187.00

CEUX

GENMAB A/S

09-Apr-2025

12:33:41 PM

2

1186.50

TQEX

GENMAB A/S

09-Apr-2025

12:33:41 PM

1

1187.00

CEUX

GENMAB A/S

09-Apr-2025

12:33:42 PM

1

1186.50

TQEX

GENMAB A/S

09-Apr-2025

12:33:42 PM

25

1186.50

TQEX

GENMAB A/S

09-Apr-2025

12:33:48 PM

65

1186.00

XCSE

GENMAB A/S

09-Apr-2025

12:33:49 PM

11

1185.50

CEUX

GENMAB A/S

09-Apr-2025

12:33:49 PM

10

1185.50

CEUX

GENMAB A/S

09-Apr-2025

12:35:27 PM

3

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:35:42 PM

84

1188.50

XCSE

GENMAB A/S

09-Apr-2025

12:35:42 PM

21

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:35:52 PM

24

1187.50

CEUX

GENMAB A/S

09-Apr-2025

12:35:58 PM

25

1187.00

XCSE

GENMAB A/S

09-Apr-2025

12:35:58 PM

54

1187.00

XCSE

GENMAB A/S

09-Apr-2025

12:36:46 PM

24

1187.00

CEUX

GENMAB A/S

09-Apr-2025

12:37:26 PM

72

1187.00

XCSE

GENMAB A/S

09-Apr-2025

12:38:44 PM

24

1186.50

CEUX

GENMAB A/S

09-Apr-2025

12:38:45 PM

7

1186.00

XCSE

GENMAB A/S

09-Apr-2025

12:38:45 PM

67

1186.00

XCSE

GENMAB A/S

09-Apr-2025

12:39:42 PM

59

1187.00

XCSE

GENMAB A/S

09-Apr-2025

12:40:26 PM

25

1188.50

TQEX

GENMAB A/S

09-Apr-2025

12:40:26 PM

33

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:41:45 PM

30

1188.50

AQEU

GENMAB A/S

09-Apr-2025

12:42:10 PM

42

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:42:17 PM

36

1187.50

CEUX

GENMAB A/S

09-Apr-2025

12:44:51 PM

24

1189.00

TQEX

GENMAB A/S

09-Apr-2025

12:44:51 PM

47

1189.00

CEUX

GENMAB A/S

09-Apr-2025

12:45:48 PM

82

1189.00

XCSE

GENMAB A/S

09-Apr-2025

12:46:42 PM

40

1188.50

CEUX

GENMAB A/S

09-Apr-2025

12:47:39 PM

87

1188.00

XCSE

GENMAB A/S

09-Apr-2025

12:51:35 PM

26

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:51:52 PM

3

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:51:52 PM

26

1190.00

XCSE

GENMAB A/S

09-Apr-2025

12:52:24 PM

3

1190.50

XCSE

GENMAB A/S

09-Apr-2025

12:52:52 PM

79

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:54:10 PM

83

1191.50

CEUX

GENMAB A/S

09-Apr-2025

12:54:10 PM

1

1191.50

CEUX

GENMAB A/S

09-Apr-2025

12:55:38 PM

35

1192.50

XCSE

GENMAB A/S

09-Apr-2025

12:55:38 PM

47

1192.50

XCSE

GENMAB A/S

09-Apr-2025

12:55:38 PM

30

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:55:38 PM

26

1192.50

TQEX

GENMAB A/S

09-Apr-2025

12:55:38 PM

88

1192.50

CEUX

GENMAB A/S

09-Apr-2025

12:56:46 PM

83

1194.00

XCSE

149


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

12:57:13 PM

19

1194.00

XCSE

GENMAB A/S

09-Apr-2025

12:57:13 PM

64

1194.00

XCSE

GENMAB A/S

09-Apr-2025

12:57:13 PM

73

1193.50

CEUX

GENMAB A/S

09-Apr-2025

12:57:22 PM

87

1193.00

XCSE

GENMAB A/S

09-Apr-2025

12:57:22 PM

24

1193.50

TQEX

GENMAB A/S

09-Apr-2025

12:57:22 PM

24

1192.50

TQEX

GENMAB A/S

09-Apr-2025

12:57:22 PM

29

1193.50

AQEU

GENMAB A/S

09-Apr-2025

12:57:22 PM

59

1192.50

CEUX

GENMAB A/S

09-Apr-2025

12:58:04 PM

28

1193.00

XCSE

GENMAB A/S

09-Apr-2025

12:58:04 PM

6

1193.00

XCSE

GENMAB A/S

09-Apr-2025

12:58:04 PM

54

1193.00

XCSE

GENMAB A/S

09-Apr-2025

12:58:47 PM

24

1192.50

CEUX

GENMAB A/S

09-Apr-2025

12:58:51 PM

51

1192.00

XCSE

GENMAB A/S

09-Apr-2025

12:59:49 PM

20

1191.50

CEUX

GENMAB A/S

09-Apr-2025

12:59:50 PM

60

1191.50

CEUX

GENMAB A/S

09-Apr-2025

12:59:51 PM

86

1191.00

XCSE

GENMAB A/S

09-Apr-2025

12:59:52 PM

25

1190.50

CEUX

GENMAB A/S

09-Apr-2025

12:59:53 PM

79

1189.50

XCSE

GENMAB A/S

09-Apr-2025

12:59:53 PM

79

1188.50

XCSE

GENMAB A/S

09-Apr-2025

12:59:53 PM

25

1189.50

CEUX

GENMAB A/S

09-Apr-2025

12:59:54 PM

10

1187.00

XCSE

GENMAB A/S

09-Apr-2025

12:59:55 PM

21

1187.00

XCSE

GENMAB A/S

09-Apr-2025

13:00:00 PM

24

1186.00

AQEU

GENMAB A/S

09-Apr-2025

13:00:18 PM

32

1182.00

XCSE

GENMAB A/S

09-Apr-2025

13:00:34 PM

26

1180.00

AQEU

GENMAB A/S

09-Apr-2025

13:00:47 PM

29

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:01:00 PM

27

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:01:31 PM

3

1180.00

TQEX

GENMAB A/S

09-Apr-2025

13:01:31 PM

23

1180.00

TQEX

GENMAB A/S

09-Apr-2025

13:02:03 PM

33

1181.00

XCSE

GENMAB A/S

09-Apr-2025

13:02:04 PM

26

1180.00

XCSE

GENMAB A/S

09-Apr-2025

13:02:40 PM

29

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:02:40 PM

25

1179.00

CEUX

GENMAB A/S

09-Apr-2025

13:03:32 PM

24

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:03:39 PM

9

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:03:39 PM

15

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:04:17 PM

30

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:04:27 PM

24

1177.00

XCSE

GENMAB A/S

09-Apr-2025

13:04:39 PM

14

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:04:39 PM

17

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:05:06 PM

9

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:05:06 PM

15

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:05:25 PM

25

1179.00

XCSE

150


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

13:05:48 PM

30

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:06:00 PM

28

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:06:00 PM

24

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:06:37 PM

7

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:06:38 PM

10

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:06:38 PM

26

1179.00

AQEU

GENMAB A/S

09-Apr-2025

13:06:52 PM

8

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:07:15 PM

27

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:07:27 PM

14

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:07:27 PM

10

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:08:03 PM

29

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:08:31 PM

24

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:08:34 PM

25

1177.00

XCSE

GENMAB A/S

09-Apr-2025

13:08:34 PM

24

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:08:35 PM

25

1176.00

XCSE

GENMAB A/S

09-Apr-2025

13:08:44 PM

24

1175.50

CEUX

GENMAB A/S

09-Apr-2025

13:08:48 PM

26

1175.00

XCSE

GENMAB A/S

09-Apr-2025

13:09:40 PM

27

1176.00

AQEU

GENMAB A/S

09-Apr-2025

13:09:42 PM

24

1175.50

CEUX

GENMAB A/S

09-Apr-2025

13:11:13 PM

48

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:12:39 PM

61

1180.50

XCSE

GENMAB A/S

09-Apr-2025

13:13:02 PM

25

1180.50

AQEU

GENMAB A/S

09-Apr-2025

13:13:06 PM

24

1180.00

TQEX

GENMAB A/S

09-Apr-2025

13:13:46 PM

65

1179.50

XCSE

GENMAB A/S

09-Apr-2025

13:13:46 PM

36

1179.50

CEUX

GENMAB A/S

09-Apr-2025

13:14:11 PM

59

1178.50

XCSE

GENMAB A/S

09-Apr-2025

13:14:11 PM

42

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:15:47 PM

20

1181.50

XCSE

GENMAB A/S

09-Apr-2025

13:15:47 PM

49

1181.50

XCSE

GENMAB A/S

09-Apr-2025

13:15:58 PM

24

1181.00

TQEX

GENMAB A/S

09-Apr-2025

13:16:52 PM

59

1180.00

XCSE

GENMAB A/S

09-Apr-2025

13:16:52 PM

46

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:18:17 PM

34

1178.50

XCSE

GENMAB A/S

09-Apr-2025

13:18:17 PM

40

1178.50

CEUX

GENMAB A/S

09-Apr-2025

13:19:44 PM

82

1181.00

XCSE

GENMAB A/S

09-Apr-2025

13:19:46 PM

24

1181.00

TQEX

GENMAB A/S

09-Apr-2025

13:19:51 PM

81

1180.00

XCSE

GENMAB A/S

09-Apr-2025

13:19:51 PM

36

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:19:51 PM

27

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:19:55 PM

24

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:19:55 PM

55

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:21:04 PM

28

1178.50

XCSE

GENMAB A/S

09-Apr-2025

13:21:04 PM

53

1178.50

CEUX

151


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

13:21:17 PM

9

1177.50

XCSE

GENMAB A/S

09-Apr-2025

13:23:41 PM

24

1178.00

TQEX

GENMAB A/S

09-Apr-2025

13:23:43 PM

30

1177.50

XCSE

GENMAB A/S

09-Apr-2025

13:23:43 PM

32

1177.50

CEUX

GENMAB A/S

09-Apr-2025

13:25:04 PM

87

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:26:53 PM

81

1180.00

XCSE

GENMAB A/S

09-Apr-2025

13:26:53 PM

66

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:27:20 PM

54

1179.00

XCSE

GENMAB A/S

09-Apr-2025

13:27:20 PM

75

1179.00

CEUX

GENMAB A/S

09-Apr-2025

13:27:21 PM

7

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:27:21 PM

24

1178.50

TQEX

GENMAB A/S

09-Apr-2025

13:27:37 PM

24

1178.50

AQEU

GENMAB A/S

09-Apr-2025

13:29:55 PM

24

1178.00

CEUX

GENMAB A/S

09-Apr-2025

13:30:29 PM

71

1178.00

XCSE

GENMAB A/S

09-Apr-2025

13:30:29 PM

55

1178.00

CEUX

GENMAB A/S

09-Apr-2025

13:32:42 PM

70

1176.50

XCSE

GENMAB A/S

09-Apr-2025

13:32:42 PM

24

1176.50

TQEX

GENMAB A/S

09-Apr-2025

13:32:42 PM

11

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:32:42 PM

15

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:32:44 PM

25

1175.50

CEUX

GENMAB A/S

09-Apr-2025

13:32:55 PM

42

1175.00

XCSE

GENMAB A/S

09-Apr-2025

13:33:04 PM

39

1174.50

CEUX

GENMAB A/S

09-Apr-2025

13:33:53 PM

86

1174.00

XCSE

GENMAB A/S

09-Apr-2025

13:34:49 PM

51

1174.50

CEUX

GENMAB A/S

09-Apr-2025

13:35:10 PM

86

1174.00

XCSE

GENMAB A/S

09-Apr-2025

13:36:01 PM

88

1174.50

XCSE

GENMAB A/S

09-Apr-2025

13:36:01 PM

24

1174.50

TQEX

GENMAB A/S

09-Apr-2025

13:39:40 PM

24

1176.00

TQEX

GENMAB A/S

09-Apr-2025

13:39:55 PM

88

1175.50

XCSE

GENMAB A/S

09-Apr-2025

13:39:55 PM

60

1175.50

CEUX

GENMAB A/S

09-Apr-2025

13:40:06 PM

69

1174.50

XCSE

GENMAB A/S

09-Apr-2025

13:40:06 PM

57

1174.50

CEUX

GENMAB A/S

09-Apr-2025

13:40:33 PM

20

1177.00

XCSE

GENMAB A/S

09-Apr-2025

13:40:33 PM

65

1177.00

XCSE

GENMAB A/S

09-Apr-2025

13:40:33 PM

24

1177.00

AQEU

GENMAB A/S

09-Apr-2025

13:40:33 PM

52

1177.00

CEUX

GENMAB A/S

09-Apr-2025

13:41:39 PM

44

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:41:39 PM

4

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:42:41 PM

26

1176.50

CEUX

GENMAB A/S

09-Apr-2025

13:42:43 PM

24

1177.00

CEUX

GENMAB A/S

09-Apr-2025

13:42:43 PM

1

1177.00

CEUX

GENMAB A/S

09-Apr-2025

13:43:26 PM

83

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:43:44 PM

24

1182.50

TQEX

152


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

13:44:01 PM

85

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:44:20 PM

85

1181.50

XCSE

GENMAB A/S

09-Apr-2025

13:44:20 PM

39

1182.00

CEUX

GENMAB A/S

09-Apr-2025

13:44:23 PM

26

1181.00

CEUX

GENMAB A/S

09-Apr-2025

13:44:30 PM

40

1180.50

XCSE

GENMAB A/S

09-Apr-2025

13:44:30 PM

26

1181.00

CEUX

GENMAB A/S

09-Apr-2025

13:44:40 PM

5

1180.50

XCSE

GENMAB A/S

09-Apr-2025

13:44:40 PM

40

1180.50

XCSE

GENMAB A/S

09-Apr-2025

13:45:01 PM

32

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:45:41 PM

30

1181.00

AQEU

GENMAB A/S

09-Apr-2025

13:45:41 PM

24

1181.00

CEUX

GENMAB A/S

09-Apr-2025

13:46:02 PM

52

1180.00

XCSE

GENMAB A/S

09-Apr-2025

13:46:02 PM

22

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:46:02 PM

3

1180.00

CEUX

GENMAB A/S

09-Apr-2025

13:47:17 PM

82

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:47:17 PM

18

1182.00

CEUX

GENMAB A/S

09-Apr-2025

13:47:18 PM

28

1182.00

AQEU

GENMAB A/S

09-Apr-2025

13:47:18 PM

6

1182.00

CEUX

GENMAB A/S

09-Apr-2025

13:47:35 PM

25

1182.00

AQEU

GENMAB A/S

09-Apr-2025

13:47:35 PM

15

1182.00

CEUX

GENMAB A/S

09-Apr-2025

13:47:35 PM

12

1182.00

CEUX

GENMAB A/S

09-Apr-2025

13:48:22 PM

24

1185.50

TQEX

GENMAB A/S

09-Apr-2025

13:48:22 PM

17

1185.50

CEUX

GENMAB A/S

09-Apr-2025

13:48:22 PM

16

1185.50

CEUX

GENMAB A/S

09-Apr-2025

13:48:23 PM

14

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:48:23 PM

69

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:49:17 PM

25

1187.00

CEUX

GENMAB A/S

09-Apr-2025

13:49:40 PM

67

1186.50

XCSE

GENMAB A/S

09-Apr-2025

13:49:56 PM

72

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:49:56 PM

24

1185.50

CEUX

GENMAB A/S

09-Apr-2025

13:50:19 PM

9

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:50:19 PM

31

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:50:43 PM

24

1187.50

TQEX

GENMAB A/S

09-Apr-2025

13:50:43 PM

29

1187.50

CEUX

GENMAB A/S

09-Apr-2025

13:50:44 PM

10

1187.00

XCSE

GENMAB A/S

09-Apr-2025

13:51:01 PM

55

1187.00

XCSE

GENMAB A/S

09-Apr-2025

13:51:31 PM

26

1187.00

CEUX

GENMAB A/S

09-Apr-2025

13:51:52 PM

25

1186.00

XCSE

GENMAB A/S

09-Apr-2025

13:51:52 PM

71

1185.50

XCSE

GENMAB A/S

09-Apr-2025

13:51:53 PM

26

1185.00

CEUX

GENMAB A/S

09-Apr-2025

13:52:40 PM

25

1185.00

CEUX

GENMAB A/S

09-Apr-2025

13:53:04 PM

82

1184.50

XCSE

GENMAB A/S

09-Apr-2025

13:54:02 PM

27

1184.50

CEUX

153


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

13:55:28 PM

20

1185.00

CEUX

GENMAB A/S

09-Apr-2025

13:55:28 PM

12

1185.00

CEUX

GENMAB A/S

09-Apr-2025

13:55:51 PM

74

1184.50

XCSE

GENMAB A/S

09-Apr-2025

13:55:51 PM

41

1183.50

XCSE

GENMAB A/S

09-Apr-2025

13:55:51 PM

24

1184.50

TQEX

GENMAB A/S

09-Apr-2025

13:55:51 PM

31

1184.50

AQEU

GENMAB A/S

09-Apr-2025

13:55:51 PM

24

1183.50

CEUX

GENMAB A/S

09-Apr-2025

13:55:52 PM

29

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:55:52 PM

25

1182.50

CEUX

GENMAB A/S

09-Apr-2025

13:56:16 PM

24

1182.50

CEUX

GENMAB A/S

09-Apr-2025

13:57:55 PM

37

1182.50

CEUX

GENMAB A/S

09-Apr-2025

13:58:32 PM

60

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:58:32 PM

22

1182.50

XCSE

GENMAB A/S

09-Apr-2025

13:58:32 PM

25

1182.50

AQEU

GENMAB A/S

09-Apr-2025

13:58:32 PM

29

1182.50

CEUX

GENMAB A/S

09-Apr-2025

13:59:42 PM

4

1182.00

TQEX

GENMAB A/S

09-Apr-2025

13:59:49 PM

38

1182.50

CEUX

GENMAB A/S

09-Apr-2025

13:59:55 PM

7

1182.00

TQEX

GENMAB A/S

09-Apr-2025

14:00:08 PM

7

1182.00

TQEX

GENMAB A/S

09-Apr-2025

14:00:08 PM

6

1182.00

TQEX

GENMAB A/S

09-Apr-2025

14:00:29 PM

10

1181.50

XCSE

GENMAB A/S

09-Apr-2025

14:00:29 PM

3

1181.50

XCSE

GENMAB A/S

09-Apr-2025

14:00:29 PM

68

1181.50

XCSE

GENMAB A/S

09-Apr-2025

14:00:29 PM

1

1181.50

CEUX

GENMAB A/S

09-Apr-2025

14:00:29 PM

23

1181.50

CEUX

GENMAB A/S

09-Apr-2025

14:00:35 PM

71

1180.50

XCSE

GENMAB A/S

09-Apr-2025

14:00:35 PM

24

1180.50

TQEX

GENMAB A/S

09-Apr-2025

14:00:35 PM

25

1180.50

CEUX

GENMAB A/S

09-Apr-2025

14:01:18 PM

83

1183.50

XCSE

GENMAB A/S

09-Apr-2025

14:01:18 PM

25

1184.00

AQEU

GENMAB A/S

09-Apr-2025

14:01:18 PM

25

1184.50

AQEU

GENMAB A/S

09-Apr-2025

14:01:18 PM

24

1183.50

CEUX

GENMAB A/S

09-Apr-2025

14:01:18 PM

30

1183.50

CEUX

GENMAB A/S

09-Apr-2025

14:01:44 PM

87

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:01:44 PM

36

1182.50

AQEU

GENMAB A/S

09-Apr-2025

14:01:44 PM

30

1182.00

CEUX

GENMAB A/S

09-Apr-2025

14:02:54 PM

83

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:02:54 PM

31

1183.00

CEUX

GENMAB A/S

09-Apr-2025

14:04:03 PM

85

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:04:03 PM

6

1185.00

TQEX

GENMAB A/S

09-Apr-2025

14:04:03 PM

18

1185.00

TQEX

GENMAB A/S

09-Apr-2025

14:04:03 PM

44

1184.50

AQEU

GENMAB A/S

09-Apr-2025

14:04:18 PM

25

1186.00

AQEU

154


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:04:18 PM

34

1186.00

CEUX

GENMAB A/S

09-Apr-2025

14:04:54 PM

16

1186.00

CEUX

GENMAB A/S

09-Apr-2025

14:05:09 PM

26

1187.00

AQEU

GENMAB A/S

09-Apr-2025

14:05:09 PM

20

1187.00

CEUX

GENMAB A/S

09-Apr-2025

14:05:09 PM

6

1187.00

CEUX

GENMAB A/S

09-Apr-2025

14:05:09 PM

2

1187.00

CEUX

GENMAB A/S

09-Apr-2025

14:05:10 PM

81

1186.50

XCSE

GENMAB A/S

09-Apr-2025

14:05:39 PM

8

1187.00

AQEU

GENMAB A/S

09-Apr-2025

14:05:39 PM

19

1187.00

AQEU

GENMAB A/S

09-Apr-2025

14:05:39 PM

27

1187.00

CEUX

GENMAB A/S

09-Apr-2025

14:05:51 PM

1

1186.50

XCSE

GENMAB A/S

09-Apr-2025

14:05:51 PM

82

1186.50

XCSE

GENMAB A/S

09-Apr-2025

14:06:00 PM

26

1186.00

AQEU

GENMAB A/S

09-Apr-2025

14:06:00 PM

9

1186.00

CEUX

GENMAB A/S

09-Apr-2025

14:06:27 PM

11

1186.00

TQEX

GENMAB A/S

09-Apr-2025

14:06:27 PM

13

1186.00

TQEX

GENMAB A/S

09-Apr-2025

14:07:51 PM

82

1185.50

XCSE

GENMAB A/S

09-Apr-2025

14:08:02 PM

26

1185.00

AQEU

GENMAB A/S

09-Apr-2025

14:09:28 PM

6

1186.50

XCSE

GENMAB A/S

09-Apr-2025

14:09:28 PM

78

1186.50

XCSE

GENMAB A/S

09-Apr-2025

14:09:28 PM

7

1186.50

AQEU

GENMAB A/S

09-Apr-2025

14:09:28 PM

7

1186.50

AQEU

GENMAB A/S

09-Apr-2025

14:09:28 PM

13

1186.50

AQEU

GENMAB A/S

09-Apr-2025

14:09:28 PM

71

1186.50

CEUX

GENMAB A/S

09-Apr-2025

14:09:29 PM

24

1186.00

TQEX

GENMAB A/S

09-Apr-2025

14:09:29 PM

6

1185.50

CEUX

GENMAB A/S

09-Apr-2025

14:09:29 PM

7

1185.50

CEUX

GENMAB A/S

09-Apr-2025

14:09:29 PM

1

1185.50

CEUX

GENMAB A/S

09-Apr-2025

14:10:10 PM

88

1185.50

XCSE

GENMAB A/S

09-Apr-2025

14:10:10 PM

33

1185.50

CEUX

GENMAB A/S

09-Apr-2025

14:10:28 PM

83

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:10:28 PM

36

1184.50

CEUX

GENMAB A/S

09-Apr-2025

14:12:25 PM

22

1185.00

TQEX

GENMAB A/S

09-Apr-2025

14:12:25 PM

2

1185.00

TQEX

GENMAB A/S

09-Apr-2025

14:13:50 PM

87

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:13:52 PM

24

1184.00

XCSE

GENMAB A/S

09-Apr-2025

14:13:52 PM

58

1184.00

CEUX

GENMAB A/S

09-Apr-2025

14:14:36 PM

4

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:14:36 PM

43

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:14:36 PM

40

1184.50

XCSE

GENMAB A/S

09-Apr-2025

14:16:23 PM

81

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:16:23 PM

43

1183.50

XCSE

GENMAB A/S

09-Apr-2025

14:16:23 PM

4

1183.50

XCSE

155


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:16:23 PM

14

1183.50

XCSE

GENMAB A/S

09-Apr-2025

14:16:23 PM

15

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:16:23 PM

42

1183.00

AQEU

GENMAB A/S

09-Apr-2025

14:16:23 PM

27

1183.00

CEUX

GENMAB A/S

09-Apr-2025

14:16:23 PM

20

1183.00

CEUX

GENMAB A/S

09-Apr-2025

14:16:30 PM

5

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:16:52 PM

65

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:16:55 PM

24

1182.50

TQEX

GENMAB A/S

09-Apr-2025

14:17:25 PM

84

1182.00

XCSE

GENMAB A/S

09-Apr-2025

14:17:25 PM

34

1182.00

CEUX

GENMAB A/S

09-Apr-2025

14:17:52 PM

81

1181.00

XCSE

GENMAB A/S

09-Apr-2025

14:18:26 PM

85

1181.50

CEUX

GENMAB A/S

09-Apr-2025

14:18:27 PM

86

1181.00

XCSE

GENMAB A/S

09-Apr-2025

14:18:27 PM

24

1181.00

TQEX

GENMAB A/S

09-Apr-2025

14:18:27 PM

58

1180.50

CEUX

GENMAB A/S

09-Apr-2025

14:18:41 PM

24

1180.50

AQEU

GENMAB A/S

09-Apr-2025

14:18:41 PM

42

1180.50

CEUX

GENMAB A/S

09-Apr-2025

14:18:58 PM

81

1180.00

XCSE

GENMAB A/S

09-Apr-2025

14:19:25 PM

79

1179.50

XCSE

GENMAB A/S

09-Apr-2025

14:20:04 PM

55

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:20:04 PM

29

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:20:31 PM

25

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:20:34 PM

82

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:20:42 PM

4

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:20:42 PM

25

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:21:23 PM

6

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:21:42 PM

84

1177.00

XCSE

GENMAB A/S

09-Apr-2025

14:21:42 PM

20

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:21:42 PM

4

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:22:03 PM

55

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:22:03 PM

24

1176.00

TQEX

GENMAB A/S

09-Apr-2025

14:22:03 PM

25

1175.50

CEUX

GENMAB A/S

09-Apr-2025

14:23:24 PM

39

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:24:07 PM

45

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:24:07 PM

1

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:24:44 PM

6

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:24:44 PM

51

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:25:13 PM

28

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:25:28 PM

24

1175.50

AQEU

GENMAB A/S

09-Apr-2025

14:25:28 PM

27

1175.50

CEUX

GENMAB A/S

09-Apr-2025

14:26:32 PM

36

1175.00

XCSE

GENMAB A/S

09-Apr-2025

14:26:32 PM

36

1175.00

XCSE

GENMAB A/S

09-Apr-2025

14:26:32 PM

24

1175.00

TQEX

156


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:26:47 PM

85

1174.00

XCSE

GENMAB A/S

09-Apr-2025

14:26:47 PM

25

1174.00

CEUX

GENMAB A/S

09-Apr-2025

14:27:38 PM

6

1175.00

TQEX

GENMAB A/S

09-Apr-2025

14:27:38 PM

18

1175.00

TQEX

GENMAB A/S

09-Apr-2025

14:27:39 PM

9

1174.50

CEUX

GENMAB A/S

09-Apr-2025

14:28:28 PM

87

1174.50

XCSE

GENMAB A/S

09-Apr-2025

14:28:28 PM

59

1174.50

CEUX

GENMAB A/S

09-Apr-2025

14:28:28 PM

2

1174.50

CEUX

GENMAB A/S

09-Apr-2025

14:28:30 PM

84

1173.50

XCSE

GENMAB A/S

09-Apr-2025

14:28:30 PM

65

1173.50

CEUX

GENMAB A/S

09-Apr-2025

14:28:32 PM

15

1173.50

CEUX

GENMAB A/S

09-Apr-2025

14:30:00 PM

87

1173.50

XCSE

GENMAB A/S

09-Apr-2025

14:30:00 PM

20

1173.50

CEUX

GENMAB A/S

09-Apr-2025

14:30:00 PM

19

1173.50

CEUX

GENMAB A/S

09-Apr-2025

14:30:38 PM

8

1176.00

AQEU

GENMAB A/S

09-Apr-2025

14:30:38 PM

2

1176.00

AQEU

GENMAB A/S

09-Apr-2025

14:30:38 PM

15

1176.00

AQEU

GENMAB A/S

09-Apr-2025

14:30:38 PM

49

1176.00

CEUX

GENMAB A/S

09-Apr-2025

14:31:05 PM

20

1175.50

XCSE

GENMAB A/S

09-Apr-2025

14:31:05 PM

65

1175.50

XCSE

GENMAB A/S

09-Apr-2025

14:31:05 PM

10

1175.50

TQEX

GENMAB A/S

09-Apr-2025

14:31:05 PM

14

1175.50

TQEX

GENMAB A/S

09-Apr-2025

14:31:09 PM

23

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:31:09 PM

11

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:31:09 PM

11

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:31:11 PM

8

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:31:25 PM

85

1174.50

XCSE

GENMAB A/S

09-Apr-2025

14:31:25 PM

1

1174.50

XCSE

GENMAB A/S

09-Apr-2025

14:31:54 PM

25

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:32:31 PM

24

1174.50

XCSE

GENMAB A/S

09-Apr-2025

14:32:59 PM

87

1175.00

XCSE

GENMAB A/S

09-Apr-2025

14:33:54 PM

54

1175.00

CEUX

GENMAB A/S

09-Apr-2025

14:34:19 PM

36

1176.00

CEUX

GENMAB A/S

09-Apr-2025

14:35:12 PM

8

1176.50

TQEX

GENMAB A/S

09-Apr-2025

14:35:12 PM

16

1176.50

TQEX

GENMAB A/S

09-Apr-2025

14:35:15 PM

26

1176.00

CEUX

GENMAB A/S

09-Apr-2025

14:35:17 PM

13

1176.00

CEUX

GENMAB A/S

09-Apr-2025

14:36:12 PM

42

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:36:12 PM

1

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:37:09 PM

5

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:37:09 PM

49

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:37:09 PM

30

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:37:09 PM

17

1176.50

CEUX

157


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:37:16 PM

20

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:37:24 PM

15

1176.00

TQEX

GENMAB A/S

09-Apr-2025

14:37:24 PM

2

1176.00

TQEX

GENMAB A/S

09-Apr-2025

14:38:23 PM

12

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:38:23 PM

43

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:38:23 PM

18

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:38:23 PM

13

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:38:23 PM

12

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:38:23 PM

15

1177.00

TQEX

GENMAB A/S

09-Apr-2025

14:38:23 PM

37

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:38:23 PM

6

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:38:27 PM

86

1177.00

XCSE

GENMAB A/S

09-Apr-2025

14:38:27 PM

25

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:39:46 PM

26

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:39:46 PM

1

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:39:46 PM

12

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:40:08 PM

30

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:40:29 PM

32

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:40:52 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:40:52 PM

43

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:40:52 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:42:03 PM

84

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:42:03 PM

88

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:42:03 PM

29

1178.50

TQEX

GENMAB A/S

09-Apr-2025

14:42:03 PM

4

1178.50

TQEX

GENMAB A/S

09-Apr-2025

14:42:03 PM

24

1178.50

AQEU

GENMAB A/S

09-Apr-2025

14:42:03 PM

49

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:42:03 PM

38

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:42:03 PM

25

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:43:00 PM

83

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:43:00 PM

2

1178.50

CEUX

GENMAB A/S

09-Apr-2025

14:43:00 PM

22

1178.50

CEUX

GENMAB A/S

09-Apr-2025

14:43:01 PM

25

1178.50

AQEU

GENMAB A/S

09-Apr-2025

14:43:05 PM

15

1178.00

TQEX

GENMAB A/S

09-Apr-2025

14:43:05 PM

11

1178.00

TQEX

GENMAB A/S

09-Apr-2025

14:43:05 PM

3

1178.00

TQEX

GENMAB A/S

09-Apr-2025

14:43:06 PM

84

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:43:34 PM

28

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:44:23 PM

88

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:44:40 PM

24

1176.00

CEUX

GENMAB A/S

09-Apr-2025

14:45:02 PM

74

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:45:02 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:45:02 PM

24

1178.50

AQEU

158


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:45:30 PM

34

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:45:30 PM

2

1179.00

CEUX

GENMAB A/S

09-Apr-2025

14:45:33 PM

25

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:45:33 PM

62

1178.50

XCSE

GENMAB A/S

09-Apr-2025

14:45:33 PM

24

1178.50

AQEU

GENMAB A/S

09-Apr-2025

14:46:34 PM

20

1178.50

TQEX

GENMAB A/S

09-Apr-2025

14:47:04 PM

24

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:47:10 PM

67

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:47:10 PM

14

1177.50

XCSE

GENMAB A/S

09-Apr-2025

14:47:11 PM

20

1177.00

AQEU

GENMAB A/S

09-Apr-2025

14:47:11 PM

20

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:47:14 PM

6

1177.00

AQEU

GENMAB A/S

09-Apr-2025

14:47:14 PM

11

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:47:42 PM

26

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:47:42 PM

15

1177.00

CEUX

GENMAB A/S

09-Apr-2025

14:48:25 PM

82

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:49:49 PM

24

1177.50

TQEX

GENMAB A/S

09-Apr-2025

14:49:49 PM

2

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:49:49 PM

50

1177.50

CEUX

GENMAB A/S

09-Apr-2025

14:49:53 PM

82

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:49:53 PM

34

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:50:54 PM

24

1175.50

CEUX

GENMAB A/S

09-Apr-2025

14:51:09 PM

40

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:51:09 PM

42

1176.00

XCSE

GENMAB A/S

09-Apr-2025

14:51:33 PM

85

1176.50

XCSE

GENMAB A/S

09-Apr-2025

14:51:33 PM

43

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:51:33 PM

24

1177.00

AQEU

GENMAB A/S

09-Apr-2025

14:51:38 PM

27

1176.50

TQEX

GENMAB A/S

09-Apr-2025

14:51:39 PM

30

1176.50

AQEU

GENMAB A/S

09-Apr-2025

14:52:49 PM

81

1177.00

XCSE

GENMAB A/S

09-Apr-2025

14:52:49 PM

33

1177.00

AQEU

GENMAB A/S

09-Apr-2025

14:52:50 PM

7

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:52:50 PM

34

1176.50

CEUX

GENMAB A/S

09-Apr-2025

14:53:48 PM

28

1177.50

AQEU

GENMAB A/S

09-Apr-2025

14:54:22 PM

43

1178.00

XCSE

GENMAB A/S

09-Apr-2025

14:54:36 PM

84

1178.00

XCSE

GENMAB A/S

09-Apr-2025

14:54:36 PM

52

1178.00

CEUX

GENMAB A/S

09-Apr-2025

14:55:28 PM

29

1181.00

CEUX

GENMAB A/S

09-Apr-2025

14:55:28 PM

22

1181.00

CEUX

GENMAB A/S

09-Apr-2025

14:55:53 PM

83

1181.00

XCSE

GENMAB A/S

09-Apr-2025

14:55:53 PM

24

1181.00

AQEU

GENMAB A/S

09-Apr-2025

14:55:55 PM

25

1180.50

TQEX

GENMAB A/S

09-Apr-2025

14:56:35 PM

4

1181.00

XCSE

159


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

14:57:31 PM

34

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:57:31 PM

15

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:57:31 PM

37

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:57:31 PM

14

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:57:31 PM

10

1182.50

XCSE

GENMAB A/S

09-Apr-2025

14:57:39 PM

25

1181.50

TQEX

GENMAB A/S

09-Apr-2025

14:58:25 PM

59

1182.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:03 PM

86

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:23 PM

55

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:23 PM

26

1183.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:34 PM

49

1182.50

CEUX

GENMAB A/S

09-Apr-2025

14:59:34 PM

33

1182.50

CEUX

GENMAB A/S

09-Apr-2025

14:59:38 PM

18

1182.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:38 PM

10

1182.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:55 PM

83

1181.00

XCSE

GENMAB A/S

09-Apr-2025

14:59:55 PM

54

1181.00

CEUX

GENMAB A/S

09-Apr-2025

15:00:08 PM

26

1183.00

TQEX

GENMAB A/S

09-Apr-2025

15:00:15 PM

18

1183.50

XCSE

GENMAB A/S

09-Apr-2025

15:00:15 PM

63

1183.50

XCSE

GENMAB A/S

09-Apr-2025

15:01:27 PM

81

1182.50

XCSE

GENMAB A/S

09-Apr-2025

15:01:27 PM

59

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:01:27 PM

25

1182.50

AQEU

GENMAB A/S

09-Apr-2025

15:01:28 PM

85

1181.50

XCSE

GENMAB A/S

09-Apr-2025

15:01:28 PM

68

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:01:30 PM

65

1181.50

XCSE

GENMAB A/S

09-Apr-2025

15:01:30 PM

17

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:01:30 PM

26

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:01:34 PM

12

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:01:34 PM

19

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:02:30 PM

57

1182.00

XCSE

GENMAB A/S

09-Apr-2025

15:02:30 PM

26

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:02:30 PM

10

1182.00

AQEU

GENMAB A/S

09-Apr-2025

15:02:30 PM

16

1182.00

AQEU

GENMAB A/S

09-Apr-2025

15:03:20 PM

80

1182.50

XCSE

GENMAB A/S

09-Apr-2025

15:03:20 PM

35

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:03:21 PM

26

1182.00

TQEX

GENMAB A/S

09-Apr-2025

15:03:52 PM

71

1182.00

XCSE

GENMAB A/S

09-Apr-2025

15:03:52 PM

3

1182.00

XCSE

GENMAB A/S

09-Apr-2025

15:04:03 PM

27

1181.50

CEUX

GENMAB A/S

09-Apr-2025

15:04:45 PM

74

1183.00

XCSE

GENMAB A/S

09-Apr-2025

15:04:52 PM

20

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:04:52 PM

14

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:04:52 PM

29

1183.00

AQEU

160


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:05:00 PM

61

1182.00

XCSE

GENMAB A/S

09-Apr-2025

15:06:00 PM

13

1183.00

TQEX

GENMAB A/S

09-Apr-2025

15:06:24 PM

61

1182.50

XCSE

GENMAB A/S

09-Apr-2025

15:06:24 PM

30

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:06:26 PM

8

1182.50

CEUX

GENMAB A/S

09-Apr-2025

15:07:05 PM

30

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:07:05 PM

14

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:07:49 PM

84

1184.50

XCSE

GENMAB A/S

09-Apr-2025

15:08:13 PM

83

1183.50

XCSE

GENMAB A/S

09-Apr-2025

15:08:13 PM

38

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:08:23 PM

30

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:09:10 PM

25

1185.00

AQEU

GENMAB A/S

09-Apr-2025

15:09:38 PM

86

1184.50

XCSE

GENMAB A/S

09-Apr-2025

15:09:38 PM

29

1184.50

TQEX

GENMAB A/S

09-Apr-2025

15:09:38 PM

25

1184.50

CEUX

GENMAB A/S

09-Apr-2025

15:10:10 PM

31

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:10:10 PM

17

1184.00

CEUX

GENMAB A/S

09-Apr-2025

15:10:26 PM

62

1183.50

XCSE

GENMAB A/S

09-Apr-2025

15:11:25 PM

84

1185.00

XCSE

GENMAB A/S

09-Apr-2025

15:11:25 PM

55

1185.00

CEUX

GENMAB A/S

09-Apr-2025

15:13:06 PM

82

1186.50

XCSE

GENMAB A/S

09-Apr-2025

15:13:06 PM

46

1186.50

CEUX

GENMAB A/S

09-Apr-2025

15:13:30 PM

14

1186.00

TQEX

GENMAB A/S

09-Apr-2025

15:13:43 PM

68

1185.50

XCSE

GENMAB A/S

09-Apr-2025

15:13:43 PM

19

1185.50

XCSE

GENMAB A/S

09-Apr-2025

15:13:43 PM

43

1185.50

CEUX

GENMAB A/S

09-Apr-2025

15:13:54 PM

12

1185.00

TQEX

GENMAB A/S

09-Apr-2025

15:13:55 PM

11

1185.00

TQEX

GENMAB A/S

09-Apr-2025

15:15:26 PM

14

1186.00

XCSE

GENMAB A/S

09-Apr-2025

15:16:26 PM

82

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:16:34 PM

3

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:17:33 PM

81

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:17:33 PM

35

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:17:33 PM

41

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:17:33 PM

46

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:18:21 PM

44

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:18:21 PM

37

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:18:50 PM

48

1186.50

CEUX

GENMAB A/S

09-Apr-2025

15:19:33 PM

83

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:19:33 PM

6

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:19:33 PM

7

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:19:37 PM

37

1187.50

AQEU

GENMAB A/S

09-Apr-2025

15:20:02 PM

13

1188.00

XCSE

161


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:20:02 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:02 PM

43

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:02 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:02 PM

14

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:02 PM

46

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:20:03 PM

3

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:03 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:03 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:03 PM

14

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:03 PM

17

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:03 PM

31

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:20:03 PM

6

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:20:03 PM

4

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:20:13 PM

43

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:13 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:13 PM

14

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:13 PM

12

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:19 PM

16

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:20:19 PM

83

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:20:19 PM

26

1187.50

AQEU

GENMAB A/S

09-Apr-2025

15:20:30 PM

28

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:30 PM

16

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:30 PM

30

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:30 PM

7

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:45 PM

17

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:45 PM

71

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:20:45 PM

29

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:21:42 PM

59

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:21:42 PM

22

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:21:53 PM

84

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:21:53 PM

32

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:21:53 PM

55

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:22:19 PM

88

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:22:19 PM

44

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:23:06 PM

27

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:23:06 PM

32

1187.50

TQEX

GENMAB A/S

09-Apr-2025

15:23:06 PM

40

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:23:20 PM

27

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:23:24 PM

27

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:23:52 PM

4

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:23:52 PM

43

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:23:52 PM

36

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:24:15 PM

32

1188.00

XCSE

162


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:24:32 PM

3

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:25:08 PM

43

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:08 PM

19

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:08 PM

13

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:08 PM

12

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:08 PM

14

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

83

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

30

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

17

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

17

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

43

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

3

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:25:29 PM

28

1188.50

TQEX

GENMAB A/S

09-Apr-2025

15:25:29 PM

34

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:25:29 PM

50

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:25:53 PM

15

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:25:56 PM

2

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:25:56 PM

1

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:26:05 PM

6

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:26:09 PM

31

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:26:34 PM

27

1191.00

TQEX

GENMAB A/S

09-Apr-2025

15:26:42 PM

86

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:26:42 PM

62

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:26:43 PM

20

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:26:58 PM

24

1191.00

AQEU

GENMAB A/S

09-Apr-2025

15:27:54 PM

9

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:27:54 PM

14

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:27:54 PM

16

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:27:55 PM

9

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:27:56 PM

5

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:27:56 PM

3

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:28:15 PM

85

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:28:15 PM

15

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:28:16 PM

64

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:28:16 PM

3

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:28:16 PM

29

1191.50

AQEU

GENMAB A/S

09-Apr-2025

15:29:01 PM

20

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:29:01 PM

43

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:29:01 PM

1

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:29:12 PM

54

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:29:12 PM

33

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:29:39 PM

1

1193.00

TQEX

GENMAB A/S

09-Apr-2025

15:29:39 PM

23

1193.00

TQEX

163


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:29:39 PM

8

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:29:39 PM

57

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:29:39 PM

16

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:29:44 PM

85

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:29:44 PM

3

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:29:44 PM

19

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:29:44 PM

43

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:00 PM

43

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:00 PM

30

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:00 PM

16

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:00 PM

25

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:30:00 PM

24

1192.00

AQEU

GENMAB A/S

09-Apr-2025

15:30:01 PM

83

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:01 PM

68

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:30:01 PM

5

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:30:01 PM

6

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:30:05 PM

9

1193.00

CEUX

GENMAB A/S

09-Apr-2025

15:30:11 PM

75

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:22 PM

7

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:22 PM

3

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:22 PM

83

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:22 PM

83

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:30 PM

24

1191.00

TQEX

GENMAB A/S

09-Apr-2025

15:30:31 PM

6

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

6

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

74

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

5

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

16

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

25

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:30:31 PM

32

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

3

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

32

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

20

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

64

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

23

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:31 PM

5

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:30:34 PM

84

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:34 PM

8

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:34 PM

1

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:34 PM

1

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:34 PM

1

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:34 PM

1

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:34 PM

34

1189.50

CEUX

164


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:30:43 PM

88

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:30:43 PM

2

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:30:43 PM

20

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:30:50 PM

39

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:31:03 PM

7

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:03 PM

75

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:03 PM

5

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:03 PM

25

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:03 PM

15

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:03 PM

7

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:03 PM

10

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:04 PM

43

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:04 PM

19

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:04 PM

12

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:04 PM

13

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:04 PM

12

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:04 PM

25

1190.00

TQEX

GENMAB A/S

09-Apr-2025

15:31:04 PM

19

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:05 PM

38

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:36 PM

19

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:36 PM

30

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:36 PM

45

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:36 PM

28

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:55 PM

28

1191.00

TQEX

GENMAB A/S

09-Apr-2025

15:31:55 PM

63

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:58 PM

84

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:58 PM

42

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:31:58 PM

5

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:58 PM

15

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:58 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:58 PM

2

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:31:58 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:32:31 PM

56

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:32:31 PM

28

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:32:34 PM

33

1194.00

TQEX

GENMAB A/S

09-Apr-2025

15:32:34 PM

85

1194.00

CEUX

GENMAB A/S

09-Apr-2025

15:32:35 PM

20

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:32:54 PM

39

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

86

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

34

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

20

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

43

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

13

1196.50

XCSE

165


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:33:02 PM

3

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:33:02 PM

27

1196.00

AQEU

GENMAB A/S

09-Apr-2025

15:33:06 PM

24

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:33:07 PM

4

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

16

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

43

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

19

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

12

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

43

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

13

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:07 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

12

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

16

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

12

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

43

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

13

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

5

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:08 PM

26

1197.00

TQEX

GENMAB A/S

09-Apr-2025

15:33:08 PM

86

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:33:11 PM

81

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:11 PM

88

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:33:12 PM

13

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:12 PM

20

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:12 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:12 PM

36

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:12 PM

21

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:33:12 PM

6

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

43

1197.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

16

1197.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

51

1197.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

43

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

45

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:02 PM

26

1197.00

TQEX

GENMAB A/S

09-Apr-2025

15:34:02 PM

5

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:02 PM

78

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:02 PM

10

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:02 PM

5

1196.00

CEUX

166


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:34:02 PM

40

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:02 PM

7

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:02 PM

8

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:18 PM

11

1196.00

AQEU

GENMAB A/S

09-Apr-2025

15:34:33 PM

2

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

80

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

1

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

21

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

34

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

15

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:33 PM

26

1196.00

TQEX

GENMAB A/S

09-Apr-2025

15:34:33 PM

1

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:33 PM

2

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:33 PM

84

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:33 PM

10

1196.00

AQEU

GENMAB A/S

09-Apr-2025

15:34:33 PM

3

1196.00

AQEU

GENMAB A/S

09-Apr-2025

15:34:48 PM

82

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:48 PM

34

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:34:48 PM

43

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:48 PM

22

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:48 PM

11

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:48 PM

20

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:48 PM

10

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:48 PM

11

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:48 PM

8

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:48 PM

33

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:34:49 PM

79

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:49 PM

16

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:52 PM

34

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:52 PM

16

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:34:57 PM

26

1195.50

TQEX

GENMAB A/S

09-Apr-2025

15:34:57 PM

24

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:35:00 PM

13

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:00 PM

12

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:00 PM

13

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:00 PM

7

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:00 PM

12

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:01 PM

8

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:01 PM

7

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:10 PM

88

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:10 PM

43

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:10 PM

39

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:12 PM

43

1196.00

XCSE

167


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:35:12 PM

4

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:12 PM

30

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:12 PM

27

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:24 PM

66

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:24 PM

20

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:25 PM

2

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:25 PM

12

1195.50

TQEX

GENMAB A/S

09-Apr-2025

15:35:25 PM

12

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:35:26 PM

63

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:35:35 PM

6

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:35:45 PM

7

1193.50

XCSE

GENMAB A/S

09-Apr-2025

15:35:45 PM

10

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:35:46 PM

78

1193.50

XCSE

GENMAB A/S

09-Apr-2025

15:35:46 PM

72

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:35:46 PM

24

1193.50

AQEU

GENMAB A/S

09-Apr-2025

15:36:00 PM

10

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:00 PM

72

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:00 PM

65

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

70

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:12 PM

11

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:12 PM

10

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

10

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

32

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

3

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

10

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:12 PM

10

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:16 PM

33

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:18 PM

13

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:18 PM

6

1191.50

CEUX

GENMAB A/S

09-Apr-2025

15:36:29 PM

84

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:36:32 PM

82

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:36:32 PM

12

1190.00

TQEX

GENMAB A/S

09-Apr-2025

15:36:32 PM

18

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:32 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:32 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:32 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:32 PM

2

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:32 PM

1

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:33 PM

9

1190.00

TQEX

GENMAB A/S

09-Apr-2025

15:36:34 PM

4

1190.00

TQEX

GENMAB A/S

09-Apr-2025

15:36:37 PM

83

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:36:37 PM

4

1189.00

TQEX

GENMAB A/S

09-Apr-2025

15:36:37 PM

20

1189.00

CEUX

168


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:36:57 PM

1

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:57 PM

49

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:36:57 PM

10

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:57 PM

17

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:36:59 PM

37

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:00 PM

21

1188.00

AQEU

GENMAB A/S

09-Apr-2025

15:37:49 PM

4

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

7

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:56 PM

1

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:56 PM

80

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:56 PM

12

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:56 PM

10

1190.50

TQEX

GENMAB A/S

09-Apr-2025

15:37:56 PM

26

1190.50

TQEX

GENMAB A/S

09-Apr-2025

15:37:56 PM

8

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

21

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

25

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

5

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

11

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

23

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:56 PM

1

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:37:57 PM

10

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:37:57 PM

27

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:38:34 PM

81

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:38:34 PM

13

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:02 PM

63

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:02 PM

26

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:39:05 PM

62

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:39:05 PM

1

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:39:05 PM

18

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:39:05 PM

30

1195.00

TQEX

GENMAB A/S

09-Apr-2025

15:39:06 PM

13

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:06 PM

8

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:06 PM

2

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:06 PM

4

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:06 PM

5

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:06 PM

2

1194.00

AQEU

GENMAB A/S

09-Apr-2025

15:39:43 PM

14

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:39:43 PM

18

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:39:43 PM

6

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:39:43 PM

86

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:39:43 PM

28

1196.00

TQEX

GENMAB A/S

09-Apr-2025

15:39:43 PM

10

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:43 PM

20

1195.50

CEUX

169


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:39:44 PM

24

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:45 PM

15

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:39:53 PM

27

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:39:53 PM

56

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:40:13 PM

34

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:13 PM

16

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:14 PM

1

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:40:14 PM

30

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:40:14 PM

57

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:40:14 PM

5

1195.00

AQEU

GENMAB A/S

09-Apr-2025

15:40:14 PM

8

1195.00

AQEU

GENMAB A/S

09-Apr-2025

15:40:14 PM

16

1195.00

AQEU

GENMAB A/S

09-Apr-2025

15:40:15 PM

1

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:15 PM

7

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:15 PM

17

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:15 PM

1

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:16 PM

4

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:40:25 PM

86

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:40:25 PM

25

1195.00

TQEX

GENMAB A/S

09-Apr-2025

15:40:25 PM

28

1195.00

CEUX

GENMAB A/S

09-Apr-2025

15:40:27 PM

24

1194.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:02 PM

8

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

15

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

7

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

9

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

10

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

7

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:41:02 PM

2

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:02 PM

8

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:02 PM

5

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:02 PM

1

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:02 PM

11

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:41:17 PM

5

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:41:17 PM

2

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:41:20 PM

19

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:41:20 PM

50

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:41:49 PM

25

1197.00

TQEX

GENMAB A/S

09-Apr-2025

15:41:49 PM

47

1197.00

CEUX

GENMAB A/S

09-Apr-2025

15:41:51 PM

65

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:41:51 PM

9

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:41:51 PM

77

1196.50

XCSE

GENMAB A/S

09-Apr-2025

15:42:07 PM

12

1196.00

CEUX

GENMAB A/S

09-Apr-2025

15:42:07 PM

44

1196.00

CEUX

170


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:42:09 PM

39

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:09 PM

3

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:09 PM

25

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:11 PM

39

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:11 PM

24

1196.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:16 PM

57

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:16 PM

24

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:24 PM

53

1195.50

CEUX

GENMAB A/S

09-Apr-2025

15:42:36 PM

2

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:42:45 PM

23

1195.50

AQEU

GENMAB A/S

09-Apr-2025

15:42:50 PM

83

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:42:50 PM

24

1195.00

TQEX

GENMAB A/S

09-Apr-2025

15:43:00 PM

1

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:00 PM

39

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:10 PM

14

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:43:10 PM

7

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:43:29 PM

33

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:43:29 PM

43

1195.00

XCSE

GENMAB A/S

09-Apr-2025

15:43:29 PM

17

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:29 PM

38

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:48 PM

16

1194.50

TQEX

GENMAB A/S

09-Apr-2025

15:43:48 PM

1

1194.50

TQEX

GENMAB A/S

09-Apr-2025

15:43:48 PM

1

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:48 PM

38

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:43:48 PM

15

1194.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:00 PM

86

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

16

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

13

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

81

1194.50

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

30

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

8

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

3

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:00 PM

41

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:22 PM

5

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:22 PM

36

1194.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:28 PM

10

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:28 PM

10

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:28 PM

10

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:28 PM

10

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:28 PM

5

1193.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:38 PM

6

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:38 PM

78

1193.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:41 PM

1

1192.50

TQEX

171


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:44:41 PM

40

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:41 PM

1

1192.50

CEUX

GENMAB A/S

09-Apr-2025

15:44:46 PM

29

1192.50

TQEX

GENMAB A/S

09-Apr-2025

15:44:49 PM

63

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:49 PM

25

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:44:52 PM

18

1191.50

AQEU

GENMAB A/S

09-Apr-2025

15:44:52 PM

2

1191.50

AQEU

GENMAB A/S

09-Apr-2025

15:44:52 PM

4

1191.50

AQEU

GENMAB A/S

09-Apr-2025

15:45:25 PM

19

1192.50

AQEU

GENMAB A/S

09-Apr-2025

15:45:25 PM

8

1192.50

AQEU

GENMAB A/S

09-Apr-2025

15:45:26 PM

16

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:26 PM

12

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:27 PM

33

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:46 PM

1

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

8

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

15

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

2

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

2

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

3

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

2

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

3

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

2

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

1

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

2

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:46 PM

1

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:47 PM

60

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:47 PM

14

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:47 PM

3

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:45:47 PM

32

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:47 PM

8

1192.00

CEUX

GENMAB A/S

09-Apr-2025

15:45:48 PM

43

1192.50

XCSE

GENMAB A/S

09-Apr-2025

15:45:48 PM

82

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:45:48 PM

49

1192.00

XCSE

GENMAB A/S

09-Apr-2025

15:45:48 PM

4

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:45:48 PM

23

1192.00

TQEX

GENMAB A/S

09-Apr-2025

15:46:00 PM

83

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:46:00 PM

35

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:00 PM

11

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:40 PM

10

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:40 PM

51

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:40 PM

25

1190.00

AQEU

GENMAB A/S

09-Apr-2025

15:46:42 PM

7

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:46:42 PM

43

1190.50

XCSE

172


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:46:42 PM

21

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:46:42 PM

13

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:46:42 PM

7

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:46:42 PM

14

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:46:42 PM

5

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:46:44 PM

70

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:46:44 PM

16

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:46:44 PM

4

1189.50

TQEX

GENMAB A/S

09-Apr-2025

15:46:54 PM

14

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:54 PM

36

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:46:54 PM

35

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:47:22 PM

1

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

5

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

12

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

30

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

43

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

9

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

85

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

10

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

10

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

66

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:22 PM

10

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:47:22 PM

10

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:47:22 PM

57

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:47:28 PM

9

1186.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:28 PM

5

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:47:28 PM

11

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:47:28 PM

5

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:47:28 PM

3

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:47:50 PM

43

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:50 PM

40

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:47:50 PM

62

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:47:51 PM

24

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:48:11 PM

15

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:48:11 PM

1

1187.00

AQEU

GENMAB A/S

09-Apr-2025

15:48:11 PM

3

1187.00

AQEU

GENMAB A/S

09-Apr-2025

15:48:11 PM

2

1187.00

AQEU

GENMAB A/S

09-Apr-2025

15:48:11 PM

10

1187.00

AQEU

GENMAB A/S

09-Apr-2025

15:48:11 PM

10

1187.00

AQEU

GENMAB A/S

09-Apr-2025

15:48:12 PM

11

1186.50

XCSE

GENMAB A/S

09-Apr-2025

15:48:12 PM

2

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:48:12 PM

7

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:48:12 PM

1

1187.00

AQEU

173


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:48:52 PM

1

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:48:52 PM

24

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:49:19 PM

48

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:19 PM

40

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:19 PM

85

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:49:21 PM

79

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:21 PM

6

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:25 PM

7

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:25 PM

9

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:25 PM

43

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:49:25 PM

51

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:50:16 PM

82

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:16 PM

26

1188.50

TQEX

GENMAB A/S

09-Apr-2025

15:50:16 PM

8

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:50:16 PM

15

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:50:16 PM

64

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:50:16 PM

25

1189.00

AQEU

GENMAB A/S

09-Apr-2025

15:50:38 PM

68

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:38 PM

17

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:38 PM

33

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:38 PM

28

1189.00

TQEX

GENMAB A/S

09-Apr-2025

15:50:38 PM

81

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:50:44 PM

35

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:44 PM

22

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:57 PM

43

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:57 PM

16

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:57 PM

13

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:57 PM

14

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:50:57 PM

14

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:51:02 PM

24

1188.50

AQEU

GENMAB A/S

09-Apr-2025

15:51:30 PM

86

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:51:30 PM

43

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:51:30 PM

15

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:51:30 PM

8

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:51:30 PM

35

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:51:30 PM

39

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:51:32 PM

48

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:51:32 PM

34

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

5

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

13

1188.50

XCSE

174


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:52:02 PM

24

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

82

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:02 PM

26

1187.00

TQEX

GENMAB A/S

09-Apr-2025

15:52:02 PM

88

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:52:03 PM

15

1188.00

TQEX

GENMAB A/S

09-Apr-2025

15:52:04 PM

85

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:52:04 PM

84

1187.50

CEUX

GENMAB A/S

09-Apr-2025

15:52:25 PM

86

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:52:42 PM

44

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:52:43 PM

30

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:52:46 PM

8

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:53:02 PM

61

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:53:02 PM

24

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:53:20 PM

58

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:20 PM

29

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:29 PM

47

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:29 PM

37

1191.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:32 PM

27

1191.00

TQEX

GENMAB A/S

09-Apr-2025

15:53:32 PM

10

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:53:32 PM

76

1191.00

CEUX

GENMAB A/S

09-Apr-2025

15:53:49 PM

47

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:49 PM

38

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:53:49 PM

20

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:53:50 PM

35

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:54:07 PM

67

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:54:07 PM

17

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:54:14 PM

84

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:54:14 PM

30

1189.50

TQEX

GENMAB A/S

09-Apr-2025

15:54:14 PM

86

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:04 PM

81

1190.50

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

3

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

14

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

30

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

13

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

20

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

30

1191.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:04 PM

76

1190.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:04 PM

29

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:04 PM

27

1190.50

AQEU

GENMAB A/S

09-Apr-2025

15:55:05 PM

48

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:55:05 PM

35

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:55:05 PM

19

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:07 PM

17

1189.50

TQEX

175


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:55:31 PM

5

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:34 PM

76

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:55:34 PM

12

1189.50

XCSE

GENMAB A/S

09-Apr-2025

15:55:34 PM

10

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:34 PM

10

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:35 PM

13

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:45 PM

85

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:55:45 PM

9

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:45 PM

73

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:55:46 PM

10

1188.50

AQEU

GENMAB A/S

09-Apr-2025

15:55:46 PM

10

1188.50

AQEU

GENMAB A/S

09-Apr-2025

15:55:46 PM

4

1188.50

AQEU

GENMAB A/S

09-Apr-2025

15:55:48 PM

45

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:56:09 PM

29

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:56:09 PM

19

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:56:09 PM

24

1189.50

AQEU

GENMAB A/S

09-Apr-2025

15:56:19 PM

45

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:56:20 PM

6

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:56:28 PM

88

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:56:28 PM

21

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:56:28 PM

19

1190.00

CEUX

GENMAB A/S

09-Apr-2025

15:56:28 PM

39

1190.00

AQEU

GENMAB A/S

09-Apr-2025

15:56:44 PM

8

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:56:44 PM

76

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:56:53 PM

25

1189.50

TQEX

GENMAB A/S

09-Apr-2025

15:57:05 PM

18

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:57:05 PM

16

1189.50

CEUX

GENMAB A/S

09-Apr-2025

15:57:05 PM

24

1189.50

AQEU

GENMAB A/S

09-Apr-2025

15:57:13 PM

40

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:13 PM

29

1189.00

TQEX

GENMAB A/S

09-Apr-2025

15:57:32 PM

47

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:32 PM

21

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:38 PM

28

1188.50

CEUX

GENMAB A/S

09-Apr-2025

15:57:48 PM

39

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

22

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

3

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

14

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

12

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

13

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:57:48 PM

7

1190.00

XCSE

GENMAB A/S

09-Apr-2025

15:58:06 PM

2

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:58:06 PM

1

1189.00

XCSE

GENMAB A/S

09-Apr-2025

15:58:06 PM

83

1189.00

XCSE

176


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

15:58:06 PM

58

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:58:20 PM

88

1188.00

XCSE

GENMAB A/S

09-Apr-2025

15:58:50 PM

36

1189.00

TQEX

GENMAB A/S

09-Apr-2025

15:58:50 PM

10

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:58:50 PM

71

1189.00

CEUX

GENMAB A/S

09-Apr-2025

15:59:03 PM

82

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:03 PM

5

1188.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:03 PM

53

1188.00

CEUX

GENMAB A/S

09-Apr-2025

15:59:19 PM

82

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:51 PM

8

1187.00

CEUX

GENMAB A/S

09-Apr-2025

15:59:51 PM

27

1187.00

CEUX

GENMAB A/S

09-Apr-2025

15:59:53 PM

56

1186.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

26

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

3

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

13

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

12

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

14

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

13

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

12

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

13

1187.00

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

4

1187.50

XCSE

GENMAB A/S

09-Apr-2025

15:59:59 PM

26

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:01 PM

51

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:01 PM

25

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:01 PM

3

1189.00

CEUX

GENMAB A/S

09-Apr-2025

16:00:01 PM

78

1189.00

CEUX

GENMAB A/S

09-Apr-2025

16:00:04 PM

11

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:04 PM

5

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:04 PM

67

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:04 PM

46

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:00:04 PM

39

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:00:05 PM

10

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:05 PM

4

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:00:35 PM

24

1189.50

TQEX

GENMAB A/S

09-Apr-2025

16:00:55 PM

85

1191.00

XCSE

GENMAB A/S

09-Apr-2025

16:00:55 PM

24

1191.00

TQEX

GENMAB A/S

09-Apr-2025

16:00:55 PM

63

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:01:06 PM

73

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:01:06 PM

8

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:01:11 PM

17

1189.50

CEUX

GENMAB A/S

09-Apr-2025

16:01:11 PM

42

1189.50

CEUX

GENMAB A/S

09-Apr-2025

16:01:13 PM

62

1189.00

XCSE

GENMAB A/S

09-Apr-2025

16:01:13 PM

26

1189.00

XCSE

177


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:01:31 PM

53

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:01:33 PM

31

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:02:02 PM

40

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:02:02 PM

43

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:02:02 PM

3

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:02:06 PM

80

1189.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:12 PM

14

1189.00

XCSE

GENMAB A/S

09-Apr-2025

16:02:12 PM

7

1189.50

TQEX

GENMAB A/S

09-Apr-2025

16:02:12 PM

11

1189.50

TQEX

GENMAB A/S

09-Apr-2025

16:02:12 PM

1

1188.50

TQEX

GENMAB A/S

09-Apr-2025

16:02:12 PM

46

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:15 PM

81

1191.50

XCSE

GENMAB A/S

09-Apr-2025

16:02:15 PM

42

1191.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:51 PM

88

1190.50

XCSE

GENMAB A/S

09-Apr-2025

16:02:51 PM

13

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:51 PM

2

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:51 PM

10

1190.50

AQEU

GENMAB A/S

09-Apr-2025

16:02:51 PM

20

1190.50

AQEU

GENMAB A/S

09-Apr-2025

16:02:56 PM

88

1192.50

XCSE

GENMAB A/S

09-Apr-2025

16:02:56 PM

52

1192.50

CEUX

GENMAB A/S

09-Apr-2025

16:02:57 PM

12

1192.00

AQEU

GENMAB A/S

09-Apr-2025

16:03:00 PM

12

1192.00

AQEU

GENMAB A/S

09-Apr-2025

16:03:17 PM

48

1192.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:17 PM

35

1192.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:25 PM

33

1191.50

CEUX

GENMAB A/S

09-Apr-2025

16:03:26 PM

1

1191.50

TQEX

GENMAB A/S

09-Apr-2025

16:03:26 PM

11

1191.50

CEUX

GENMAB A/S

09-Apr-2025

16:03:27 PM

23

1191.50

TQEX

GENMAB A/S

09-Apr-2025

16:03:43 PM

83

1191.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:43 PM

38

1191.50

XCSE

GENMAB A/S

09-Apr-2025

16:03:44 PM

67

1191.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:44 PM

14

1191.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:53 PM

88

1190.00

XCSE

GENMAB A/S

09-Apr-2025

16:03:53 PM

28

1190.00

TQEX

GENMAB A/S

09-Apr-2025

16:03:53 PM

10

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:03:53 PM

43

1190.50

CEUX

GENMAB A/S

09-Apr-2025

16:03:53 PM

25

1190.50

AQEU

GENMAB A/S

09-Apr-2025

16:03:58 PM

20

1190.00

AQEU

GENMAB A/S

09-Apr-2025

16:03:58 PM

4

1190.00

AQEU

GENMAB A/S

09-Apr-2025

16:04:22 PM

36

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:04:22 PM

51

1189.50

CEUX

GENMAB A/S

09-Apr-2025

16:05:11 PM

82

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:05:11 PM

1

1189.50

XCSE

178


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:05:41 PM

81

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:05:41 PM

28

1189.50

TQEX

GENMAB A/S

09-Apr-2025

16:05:42 PM

9

1189.00

CEUX

GENMAB A/S

09-Apr-2025

16:05:43 PM

14

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:05:43 PM

12

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:05:43 PM

14

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:06:03 PM

43

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:06:03 PM

40

1189.50

XCSE

GENMAB A/S

09-Apr-2025

16:06:12 PM

4

1189.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:12 PM

72

1189.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:13 PM

14

1189.00

XCSE

GENMAB A/S

09-Apr-2025

16:06:15 PM

81

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:06:15 PM

5

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:15 PM

7

1188.50

AQEU

GENMAB A/S

09-Apr-2025

16:06:16 PM

20

1188.50

AQEU

GENMAB A/S

09-Apr-2025

16:06:16 PM

12

1188.50

AQEU

GENMAB A/S

09-Apr-2025

16:06:24 PM

78

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:06:24 PM

49

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:27 PM

9

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:27 PM

10

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:06:27 PM

18

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:07:00 PM

40

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:07:00 PM

43

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:07:00 PM

13

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:07:00 PM

12

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:07:00 PM

2

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:07:00 PM

42

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:07:00 PM

40

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:07:02 PM

48

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:07:02 PM

40

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:07:22 PM

84

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:07:22 PM

79

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:07:22 PM

6

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:08:01 PM

86

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:08:01 PM

1

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:08:01 PM

44

1185.00

CEUX

GENMAB A/S

09-Apr-2025

16:08:13 PM

88

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:08:13 PM

14

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:08:13 PM

3

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:08:13 PM

7

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:08:13 PM

47

1185.00

CEUX

GENMAB A/S

09-Apr-2025

16:08:13 PM

26

1185.00

CEUX

GENMAB A/S

09-Apr-2025

16:08:52 PM

18

1186.50

XCSE

179


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:08:52 PM

68

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:08:53 PM

13

1186.50

TQEX

GENMAB A/S

09-Apr-2025

16:09:08 PM

7

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:09:08 PM

43

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:09:08 PM

24

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:09:08 PM

23

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:09:08 PM

1

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:09:26 PM

81

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:09:26 PM

38

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:09:26 PM

31

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:10:02 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:10:02 PM

37

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:10:08 PM

83

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:10:08 PM

30

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:10:08 PM

59

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:10:08 PM

24

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:10:08 PM

37

1188.00

AQEU

GENMAB A/S

09-Apr-2025

16:10:55 PM

83

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:10:55 PM

24

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:10:56 PM

26

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:11:01 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:01 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:01 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:01 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:01 PM

16

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:01 PM

85

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:11:08 PM

15

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:11:19 PM

84

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:11:22 PM

83

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:11:22 PM

32

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:04 PM

43

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:04 PM

10

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:04 PM

14

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:19 PM

67

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:12:19 PM

17

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:12:23 PM

24

1188.00

TQEX

GENMAB A/S

09-Apr-2025

16:12:47 PM

83

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:12:47 PM

85

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:12:47 PM

37

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:12:52 PM

4

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:52 PM

30

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:52 PM

24

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:12:58 PM

83

1186.50

XCSE

180


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:12:59 PM

84

1186.00

CEUX

GENMAB A/S

09-Apr-2025

16:13:02 PM

84

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:02 PM

27

1186.00

TQEX

GENMAB A/S

09-Apr-2025

16:13:19 PM

11

1185.50

AQEU

GENMAB A/S

09-Apr-2025

16:13:19 PM

1

1185.50

AQEU

GENMAB A/S

09-Apr-2025

16:13:37 PM

17

1185.50

AQEU

GENMAB A/S

09-Apr-2025

16:13:38 PM

2

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:13:44 PM

12

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

13

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

13

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

16

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

12

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

37

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:13:46 PM

64

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:14:01 PM

5

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:07 PM

4

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:11 PM

19

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:14:11 PM

5

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:14:25 PM

24

1185.50

AQEU

GENMAB A/S

09-Apr-2025

16:14:26 PM

82

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

17

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

16

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

9

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

25

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

12

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

4

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

27

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:14:26 PM

2

1184.50

TQEX

GENMAB A/S

09-Apr-2025

16:14:26 PM

6

1184.50

TQEX

GENMAB A/S

09-Apr-2025

16:15:00 PM

10

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:15:11 PM

87

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:15:11 PM

37

1186.50

TQEX

GENMAB A/S

09-Apr-2025

16:15:11 PM

54

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:15:11 PM

30

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:15:33 PM

56

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:15:38 PM

23

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:15:45 PM

8

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:15:48 PM

81

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:15:48 PM

43

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:15:48 PM

13

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:15:48 PM

10

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:15:48 PM

42

1187.00

XCSE

GENMAB A/S

09-Apr-2025

16:15:48 PM

87

1186.50

CEUX

181


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:15:48 PM

26

1187.00

AQEU

GENMAB A/S

09-Apr-2025

16:16:06 PM

10

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:16:06 PM

43

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:16:06 PM

57

1188.00

XCSE

GENMAB A/S

09-Apr-2025

16:16:06 PM

44

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:06 PM

38

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:16:06 PM

35

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:16:13 PM

10

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:13 PM

34

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:19 PM

13

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:16:19 PM

44

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:16:57 PM

7

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:57 PM

1

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:57 PM

44

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:57 PM

10

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:16:57 PM

20

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

16

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

13

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

2

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

5

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

49

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:17:00 PM

34

1188.00

TQEX

GENMAB A/S

09-Apr-2025

16:17:00 PM

3

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:17:00 PM

18

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:17:00 PM

48

1188.00

CEUX

GENMAB A/S

09-Apr-2025

16:17:00 PM

2

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:17:00 PM

31

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:18:22 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:22 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:22 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:22 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:22 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:26 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:26 PM

23

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:26 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:26 PM

14

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:26 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:29 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:29 PM

16

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:29 PM

12

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:29 PM

13

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:18:42 PM

1

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:19:26 PM

80

1187.50

XCSE

182


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:19:26 PM

21

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:19:26 PM

18

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:19:26 PM

25

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:20:04 PM

7

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:04 PM

7

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:04 PM

7

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:08 PM

84

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:08 PM

13

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:08 PM

16

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:08 PM

14

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:08 PM

13

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:08 PM

24

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:09 PM

12

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:16 PM

38

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:33 PM

55

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:33 PM

29

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:36 PM

1

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:43 PM

21

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:43 PM

30

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:43 PM

43

1188.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:48 PM

82

1187.50

XCSE

GENMAB A/S

09-Apr-2025

16:20:48 PM

29

1187.50

TQEX

GENMAB A/S

09-Apr-2025

16:20:48 PM

50

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:20:48 PM

26

1187.50

AQEU

GENMAB A/S

09-Apr-2025

16:20:55 PM

36

1187.50

CEUX

GENMAB A/S

09-Apr-2025

16:21:24 PM

82

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:21:24 PM

14

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:21:24 PM

13

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:21:24 PM

32

1186.50

TQEX

GENMAB A/S

09-Apr-2025

16:21:24 PM

51

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:21:33 PM

12

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:21:33 PM

52

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:34 PM

36

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:36 PM

67

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:21:38 PM

14

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:21:54 PM

10

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:54 PM

14

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:54 PM

12

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:54 PM

14

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:21:54 PM

20

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:02 PM

80

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:02 PM

3

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:02 PM

33

1185.00

TQEX

183


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:22:02 PM

36

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:22:02 PM

8

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:22:02 PM

6

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:22:02 PM

7

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:22:32 PM

12

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:32 PM

13

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:32 PM

12

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:32 PM

43

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:32 PM

2

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:35 PM

87

1184.00

XCSE

GENMAB A/S

09-Apr-2025

16:22:35 PM

23

1184.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

58

1184.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

6

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

5

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

15

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

10

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

26

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

24

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:22:35 PM

2

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:23:11 PM

12

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:23:11 PM

13

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:23:11 PM

14

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:23:11 PM

49

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:23:11 PM

41

1184.50

TQEX

GENMAB A/S

09-Apr-2025

16:23:45 PM

85

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:23:45 PM

30

1186.00

AQEU

GENMAB A/S

09-Apr-2025

16:23:51 PM

65

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:23:51 PM

20

1186.00

XCSE

GENMAB A/S

09-Apr-2025

16:23:51 PM

26

1186.00

AQEU

GENMAB A/S

09-Apr-2025

16:24:20 PM

86

1186.50

XCSE

GENMAB A/S

09-Apr-2025

16:24:20 PM

85

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:24:20 PM

36

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:24:20 PM

36

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:24:20 PM

8

1187.00

CEUX

GENMAB A/S

09-Apr-2025

16:24:20 PM

28

1186.50

AQEU

GENMAB A/S

09-Apr-2025

16:24:27 PM

32

1186.50

CEUX

GENMAB A/S

09-Apr-2025

16:24:31 PM

31

1186.50

AQEU

GENMAB A/S

09-Apr-2025

16:24:44 PM

39

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:24:44 PM

47

1185.50

CEUX

GENMAB A/S

09-Apr-2025

16:24:46 PM

66

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:24:46 PM

16

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:24:46 PM

47

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:33 PM

38

1185.50

CEUX

184


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:25:43 PM

82

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:50 PM

21

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:50 PM

14

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:50 PM

14

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:50 PM

12

1185.50

XCSE

GENMAB A/S

09-Apr-2025

16:25:50 PM

38

1185.00

TQEX

GENMAB A/S

09-Apr-2025

16:25:50 PM

26

1185.00

AQEU

GENMAB A/S

09-Apr-2025

16:26:00 PM

52

1184.50

CEUX

GENMAB A/S

09-Apr-2025

16:26:00 PM

36

1184.50

CEUX

GENMAB A/S

09-Apr-2025

16:26:02 PM

13

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

13

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

43

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

14

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

12

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

13

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:02 PM

2

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:16 PM

76

1184.00

XCSE

GENMAB A/S

09-Apr-2025

16:26:30 PM

50

1183.50

CEUX

GENMAB A/S

09-Apr-2025

16:26:30 PM

22

1183.50

AQEU

GENMAB A/S

09-Apr-2025

16:26:30 PM

9

1183.50

AQEU

GENMAB A/S

09-Apr-2025

16:26:44 PM

70

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

30

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

43

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

3

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

64

1182.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

9

1182.00

XCSE

GENMAB A/S

09-Apr-2025

16:27:12 PM

35

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:27:47 PM

57

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:28:07 PM

70

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:28:07 PM

8

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:28:10 PM

39

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

32

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

22

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

14

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

13

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

29

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:10 PM

25

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:28:46 PM

43

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:46 PM

30

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:46 PM

23

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:46 PM

14

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:28:46 PM

26

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:29:02 PM

12

1181.00

XCSE

185


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:29:02 PM

4

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:29:02 PM

14

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:29:02 PM

14

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:29:07 PM

86

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:29:19 PM

36

1181.50

CEUX

GENMAB A/S

09-Apr-2025

16:30:18 PM

40

1182.50

TQEX

GENMAB A/S

09-Apr-2025

16:30:24 PM

55

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:30:24 PM

31

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:30:24 PM

15

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:30:24 PM

10

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:30:24 PM

43

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:30:53 PM

27

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:30:53 PM

19

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:30:53 PM

37

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:30:54 PM

8

1183.50

CEUX

GENMAB A/S

09-Apr-2025

16:30:54 PM

7

1183.50

CEUX

GENMAB A/S

09-Apr-2025

16:30:54 PM

20

1183.50

CEUX

GENMAB A/S

09-Apr-2025

16:30:55 PM

36

1183.50

CEUX

GENMAB A/S

09-Apr-2025

16:31:01 PM

84

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:31:03 PM

17

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:31:03 PM

36

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:31:11 PM

87

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:11 PM

36

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:11 PM

23

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

43

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

36

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

13

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

14

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

4

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

84

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:31:14 PM

84

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:31:14 PM

81

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:31:36 PM

33

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:31:36 PM

3

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:32:05 PM

47

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

43

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

16

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

12

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

14

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

13

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

12

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:32:05 PM

4

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:32:05 PM

33

1181.00

CEUX

186


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:32:58 PM

15

1183.00

TQEX

GENMAB A/S

09-Apr-2025

16:32:58 PM

23

1183.00

TQEX

GENMAB A/S

09-Apr-2025

16:32:58 PM

61

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:32:58 PM

40

1183.00

AQEU

GENMAB A/S

09-Apr-2025

16:33:06 PM

13

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

12

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

12

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

28

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

59

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

11

1184.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:06 PM

50

1184.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:18 PM

26

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:18 PM

46

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:33:19 PM

85

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:19 PM

3

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:33:19 PM

41

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:33:48 PM

50

1182.00

XCSE

GENMAB A/S

09-Apr-2025

16:33:48 PM

20

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:33:48 PM

32

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:34:16 PM

2

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

4

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

43

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

43

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

12

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

13

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:16 PM

5

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:57 PM

78

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:34:57 PM

35

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:34:57 PM

1

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:34:57 PM

43

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:34:57 PM

40

1183.00

TQEX

GENMAB A/S

09-Apr-2025

16:34:57 PM

59

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:35:12 PM

3

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:35:12 PM

4

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:35:12 PM

43

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:35:12 PM

36

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:35:18 PM

84

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:35:18 PM

5

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:35:18 PM

70

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:35:43 PM

56

1183.00

XCSE

GENMAB A/S

09-Apr-2025

16:35:48 PM

40

1184.00

CEUX

GENMAB A/S

09-Apr-2025

16:35:48 PM

24

1184.00

CEUX

GENMAB A/S

09-Apr-2025

16:36:03 PM

43

1184.50

XCSE

187


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:36:03 PM

25

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:36:03 PM

25

1184.50

CEUX

GENMAB A/S

09-Apr-2025

16:36:03 PM

24

1184.50

AQEU

GENMAB A/S

09-Apr-2025

16:36:21 PM

23

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:36:21 PM

25

1185.00

XCSE

GENMAB A/S

09-Apr-2025

16:36:21 PM

87

1184.50

XCSE

GENMAB A/S

09-Apr-2025

16:36:23 PM

59

1184.00

CEUX

GENMAB A/S

09-Apr-2025

16:36:27 PM

26

1184.00

AQEU

GENMAB A/S

09-Apr-2025

16:36:31 PM

68

1183.50

XCSE

GENMAB A/S

09-Apr-2025

16:36:32 PM

20

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:36:32 PM

33

1183.00

CEUX

GENMAB A/S

09-Apr-2025

16:36:46 PM

30

1183.00

TQEX

GENMAB A/S

09-Apr-2025

16:37:09 PM

4

1182.50

AQEU

GENMAB A/S

09-Apr-2025

16:37:11 PM

85

1182.00

XCSE

GENMAB A/S

09-Apr-2025

16:37:11 PM

43

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:37:11 PM

21

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:37:11 PM

1

1182.50

XCSE

GENMAB A/S

09-Apr-2025

16:37:11 PM

27

1181.50

TQEX

GENMAB A/S

09-Apr-2025

16:37:11 PM

38

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:37:11 PM

11

1182.00

CEUX

GENMAB A/S

09-Apr-2025

16:37:11 PM

23

1182.50

AQEU

GENMAB A/S

09-Apr-2025

16:37:15 PM

45

1181.50

CEUX

GENMAB A/S

09-Apr-2025

16:37:25 PM

44

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:37:26 PM

26

1181.00

AQEU

GENMAB A/S

09-Apr-2025

16:37:43 PM

67

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:37:44 PM

24

1180.50

CEUX

GENMAB A/S

09-Apr-2025

16:38:02 PM

6

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

21

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

43

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

3

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

54

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

27

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:02 PM

48

1180.50

CEUX

GENMAB A/S

09-Apr-2025

16:38:03 PM

24

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:10 PM

2

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:10 PM

29

1180.00

AQEU

GENMAB A/S

09-Apr-2025

16:38:11 PM

16

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:38:16 PM

44

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:16 PM

15

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:38:17 PM

5

1179.00

AQEU

GENMAB A/S

09-Apr-2025

16:38:21 PM

19

1179.00

AQEU

GENMAB A/S

09-Apr-2025

16:38:24 PM

29

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:38:24 PM

5

1178.50

XCSE

188


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:39:03 PM

26

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:39:03 PM

38

1177.50

TQEX

GENMAB A/S

09-Apr-2025

16:39:03 PM

39

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:39:03 PM

24

1177.50

AQEU

GENMAB A/S

09-Apr-2025

16:39:05 PM

19

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:39:05 PM

15

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:39:39 PM

20

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:39:39 PM

6

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:39:39 PM

36

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:39:39 PM

64

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:39:40 PM

43

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:39:40 PM

14

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:39:44 PM

110

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:39:45 PM

5

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

43

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

25

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

2

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

3

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

3

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

3

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

2

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

2

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:15 PM

16

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:40:23 PM

43

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:23 PM

12

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:23 PM

13

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:23 PM

37

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:23 PM

5

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:24 PM

28

1176.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:24 PM

29

1176.00

CEUX

GENMAB A/S

09-Apr-2025

16:40:37 PM

38

1176.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:37 PM

16

1176.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:37 PM

42

1176.00

XCSE

GENMAB A/S

09-Apr-2025

16:40:37 PM

5

1175.00

CEUX

GENMAB A/S

09-Apr-2025

16:40:47 PM

29

1175.50

TQEX

GENMAB A/S

09-Apr-2025

16:40:47 PM

1

1176.00

CEUX

GENMAB A/S

09-Apr-2025

16:40:55 PM

1

1176.50

CEUX

GENMAB A/S

09-Apr-2025

16:41:06 PM

14

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:06 PM

14

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:06 PM

13

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:06 PM

36

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:41:06 PM

7

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:41:17 PM

86

1177.00

XCSE

189


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:41:17 PM

7

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:17 PM

14

1177.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:17 PM

11

1177.00

TQEX

GENMAB A/S

09-Apr-2025

16:41:17 PM

14

1177.00

TQEX

GENMAB A/S

09-Apr-2025

16:41:17 PM

15

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:41:17 PM

2

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:41:17 PM

4

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:41:24 PM

36

1176.50

CEUX

GENMAB A/S

09-Apr-2025

16:41:43 PM

78

1176.00

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

12

1176.50

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

16

1176.50

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

43

1176.50

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

14

1176.50

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

25

1176.50

XCSE

GENMAB A/S

09-Apr-2025

16:41:43 PM

64

1176.00

CEUX

GENMAB A/S

09-Apr-2025

16:43:04 PM

48

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:43:45 PM

88

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:44:05 PM

74

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:44:08 PM

6

1178.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:08 PM

7

1178.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:08 PM

23

1178.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:08 PM

3

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:16 PM

30

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

43

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

14

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

10

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

110

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

9

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

50

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

50

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:16 PM

1

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

12

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

43

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

29

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

28

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

12

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

43

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:17 PM

14

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:22 PM

14

1178.50

XCSE

190


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:44:22 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:44:22 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:44:22 PM

12

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:22 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:33 PM

30

1178.00

TQEX

GENMAB A/S

09-Apr-2025

16:44:33 PM

63

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:33 PM

23

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:34 PM

15

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:34 PM

2

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:34 PM

36

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:34 PM

2

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:54 PM

28

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:54 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:54 PM

1

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:54 PM

47

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:54 PM

14

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:54 PM

7

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:44:57 PM

83

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:44:57 PM

15

1177.00

TQEX

GENMAB A/S

09-Apr-2025

16:44:57 PM

23

1177.00

TQEX

GENMAB A/S

09-Apr-2025

16:44:57 PM

5

1177.00

TQEX

GENMAB A/S

09-Apr-2025

16:44:57 PM

38

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

38

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

34

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

20

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

2

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

14

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:44:57 PM

47

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:45:04 PM

32

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:45:27 PM

41

1177.00

CEUX

GENMAB A/S

09-Apr-2025

16:46:07 PM

33

1179.00

TQEX

GENMAB A/S

09-Apr-2025

16:46:07 PM

86

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:46:09 PM

82

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:46:09 PM

43

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:46:09 PM

14

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:46:09 PM

37

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:46:09 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:46:09 PM

3

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:46:13 PM

78

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:46:13 PM

9

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:46:24 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:46:24 PM

14

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:46:24 PM

14

1178.50

XCSE

191


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:46:24 PM

46

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:46:49 PM

26

1179.00

TQEX

GENMAB A/S

09-Apr-2025

16:46:49 PM

36

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:46:49 PM

6

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:47:55 PM

87

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:47:55 PM

43

1179.50

TQEX

GENMAB A/S

09-Apr-2025

16:47:55 PM

44

1179.50

AQEU

GENMAB A/S

09-Apr-2025

16:47:56 PM

4

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

61

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

42

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

7

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

43

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

14

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

42

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

11

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:02 PM

20

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:02 PM

64

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:03 PM

9

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

5

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

4

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

6

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

3

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

5

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:03 PM

31

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:03 PM

40

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:04 PM

43

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:04 PM

13

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:04 PM

12

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:04 PM

37

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:04 PM

5

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:04 PM

36

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:48:04 PM

6

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:48:04 PM

6

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:48:04 PM

7

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:48:04 PM

12

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:05 PM

9

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:05 PM

42

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:05 PM

72

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:05 PM

15

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:12 PM

65

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:13 PM

22

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:16 PM

80

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:16 PM

8

1178.50

XCSE

192


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:48:16 PM

36

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:16 PM

57

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:48:47 PM

52

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:48:47 PM

31

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:49:10 PM

81

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:49:10 PM

3

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:49:10 PM

14

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:49:10 PM

43

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:49:10 PM

40

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

44

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

8

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

36

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

6

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

8

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:49:10 PM

13

1179.50

AQEU

GENMAB A/S

09-Apr-2025

16:49:10 PM

15

1179.50

AQEU

GENMAB A/S

09-Apr-2025

16:49:10 PM

5

1179.50

AQEU

GENMAB A/S

09-Apr-2025

16:49:39 PM

23

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:49:39 PM

43

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:49:39 PM

7

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:49:39 PM

37

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:49:39 PM

5

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:49:40 PM

36

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:15 PM

86

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:50:15 PM

37

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:50:15 PM

47

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:50:15 PM

25

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:50:15 PM

25

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:50:15 PM

46

1180.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:15 PM

32

1180.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:15 PM

33

1180.50

AQEU

GENMAB A/S

09-Apr-2025

16:50:16 PM

38

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

16

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

21

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

35

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

18

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

18

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

58

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

12

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

4

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

9

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

32

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

16

1181.00

XCSE

193


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:50:16 PM

43

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:16 PM

10

1181.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:17 PM

6

1180.00

AQEU

GENMAB A/S

09-Apr-2025

16:50:17 PM

31

1180.00

AQEU

GENMAB A/S

09-Apr-2025

16:50:19 PM

28

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

6

1180.00

TQEX

GENMAB A/S

09-Apr-2025

16:50:40 PM

21

1180.00

TQEX

GENMAB A/S

09-Apr-2025

16:50:40 PM

6

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

4

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

3

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

2

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

4

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

1

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:40 PM

24

1180.00

AQEU

GENMAB A/S

09-Apr-2025

16:50:46 PM

45

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:46 PM

9

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:46 PM

43

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:46 PM

12

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:46 PM

1

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:46 PM

35

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:46 PM

40

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:50:47 PM

12

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:47 PM

43

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:47 PM

14

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:47 PM

12

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:47 PM

29

1180.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:48 PM

25

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:54 PM

2

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:50:54 PM

72

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:54 PM

2

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:50:55 PM

11

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:51:12 PM

28

1178.50

AQEU

GENMAB A/S

09-Apr-2025

16:51:13 PM

38

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:13 PM

86

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:17 PM

2

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:17 PM

12

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:17 PM

12

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:17 PM

13

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:18 PM

10

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:18 PM

27

1179.50

AQEU

GENMAB A/S

09-Apr-2025

16:51:47 PM

47

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:51:47 PM

77

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:51:48 PM

3

1178.50

TQEX

194


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:51:48 PM

3

1178.50

TQEX

GENMAB A/S

09-Apr-2025

16:51:48 PM

2

1178.50

TQEX

GENMAB A/S

09-Apr-2025

16:51:48 PM

3

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

79

1181.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:55 PM

30

1182.00

TQEX

GENMAB A/S

09-Apr-2025

16:51:55 PM

36

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

51

1182.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

24

1182.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

70

1181.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

8

1181.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

20

1181.50

CEUX

GENMAB A/S

09-Apr-2025

16:51:55 PM

1

1181.00

AQEU

GENMAB A/S

09-Apr-2025

16:51:55 PM

23

1181.00

AQEU

GENMAB A/S

09-Apr-2025

16:51:56 PM

77

1180.50

XCSE

GENMAB A/S

09-Apr-2025

16:51:56 PM

8

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:51:56 PM

8

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:51:56 PM

3

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:51:56 PM

5

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:51:56 PM

5

1181.00

CEUX

GENMAB A/S

09-Apr-2025

16:52:01 PM

9

1180.50

TQEX

GENMAB A/S

09-Apr-2025

16:52:07 PM

72

1180.00

CEUX

GENMAB A/S

09-Apr-2025

16:52:08 PM

72

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:08 PM

10

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:11 PM

15

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:11 PM

26

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:11 PM

30

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:12 PM

27

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:52:35 PM

76

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

43

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

22

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

24

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

9

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

4

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

14

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

16

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

43

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

20

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:57 PM

28

1178.50

TQEX

GENMAB A/S

09-Apr-2025

16:52:57 PM

24

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:52:57 PM

24

1178.50

AQEU

GENMAB A/S

09-Apr-2025

16:52:58 PM

15

1178.50

XCSE

195


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:52:58 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:58 PM

12

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:58 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:58 PM

14

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:52:58 PM

9

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:02 PM

1

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:05 PM

14

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:05 PM

9

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:05 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:05 PM

13

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:12 PM

12

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:12 PM

43

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:12 PM

5

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:12 PM

30

1178.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:12 PM

36

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:53:12 PM

8

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:12 PM

47

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:16 PM

10

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:23 PM

36

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:24 PM

36

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:25 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:25 PM

14

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:25 PM

31

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:27 PM

10

1178.00

CEUX

GENMAB A/S

09-Apr-2025

16:53:32 PM

34

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:32 PM

13

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:32 PM

1

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:32 PM

2

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:41 PM

25

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:53:41 PM

25

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:41 PM

27

1178.50

TQEX

GENMAB A/S

09-Apr-2025

16:53:41 PM

43

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:53:49 PM

28

1178.50

XCSE

GENMAB A/S

09-Apr-2025

16:53:49 PM

5

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:53:49 PM

1

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:53:49 PM

24

1178.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

43

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

12

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

12

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

14

1179.50

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

2

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

37

1179.00

XCSE

GENMAB A/S

09-Apr-2025

16:54:16 PM

8

1179.00

XCSE

196


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April 7 – April 9, 2025

Graphic

GENMAB A/S

09-Apr-2025

16:54:16 PM

36

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

7

1179.00

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

23

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

8

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

8

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:16 PM

1

1179.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:18 PM

24

1178.00

AQEU

GENMAB A/S

09-Apr-2025

16:54:25 PM

13

1177.50

XCSE

GENMAB A/S

09-Apr-2025

16:54:25 PM

28

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:34 PM

3

1177.00

AQEU

GENMAB A/S

09-Apr-2025

16:54:45 PM

22

1177.00

AQEU

GENMAB A/S

09-Apr-2025

16:54:49 PM

2

1177.50

CEUX

GENMAB A/S

09-Apr-2025

16:54:49 PM

26

1177.50

AQEU

197


EX-99.1(B) 4 gmab-20250414xex99d1b.htm EX-99.1(B)

Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

09:37:32 AM

1

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:37:32 AM

87

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:37:32 AM

78

1259.50

XCSE

GENMAB A/S

10-Apr-2025

09:37:32 AM

86

1260.50

CEUX

GENMAB A/S

10-Apr-2025

09:37:32 AM

74

1259.50

CEUX

GENMAB A/S

10-Apr-2025

09:37:32 AM

76

1260.00

AQEU

GENMAB A/S

10-Apr-2025

09:38:01 AM

3

1258.50

XCSE

GENMAB A/S

10-Apr-2025

09:38:01 AM

77

1258.50

XCSE

GENMAB A/S

10-Apr-2025

09:38:01 AM

83

1259.00

TQEX

GENMAB A/S

10-Apr-2025

09:38:01 AM

81

1259.00

AQEU

GENMAB A/S

10-Apr-2025

09:38:12 AM

53

1259.00

TQEX

GENMAB A/S

10-Apr-2025

09:38:54 AM

55

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:38:54 AM

26

1260.50

TQEX

GENMAB A/S

10-Apr-2025

09:38:54 AM

27

1260.50

CEUX

GENMAB A/S

10-Apr-2025

09:39:12 AM

30

1259.50

XCSE

GENMAB A/S

10-Apr-2025

09:39:12 AM

26

1260.00

AQEU

GENMAB A/S

10-Apr-2025

09:39:13 AM

11

1259.50

CEUX

GENMAB A/S

10-Apr-2025

09:39:29 AM

3

1260.00

AQEU

GENMAB A/S

10-Apr-2025

09:39:39 AM

47

1259.50

XCSE

GENMAB A/S

10-Apr-2025

09:39:39 AM

38

1258.50

XCSE

GENMAB A/S

10-Apr-2025

09:39:39 AM

37

1259.00

TQEX

GENMAB A/S

10-Apr-2025

09:39:39 AM

15

1259.50

CEUX

GENMAB A/S

10-Apr-2025

09:39:39 AM

26

1258.50

CEUX

GENMAB A/S

10-Apr-2025

09:39:39 AM

23

1260.00

AQEU

GENMAB A/S

10-Apr-2025

09:40:09 AM

32

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:40:09 AM

19

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:40:24 AM

36

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:40:24 AM

36

1260.50

CEUX

GENMAB A/S

10-Apr-2025

09:40:59 AM

26

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:40:59 AM

37

1261.00

CEUX

GENMAB A/S

10-Apr-2025

09:42:03 AM

23

1263.00

XCSE

GENMAB A/S

10-Apr-2025

09:42:05 AM

55

1263.00

XCSE

GENMAB A/S

10-Apr-2025

09:43:05 AM

6

1262.00

XCSE

GENMAB A/S

10-Apr-2025

09:43:05 AM

74

1262.00

XCSE

GENMAB A/S

10-Apr-2025

09:43:05 AM

23

1262.00

CEUX

GENMAB A/S

10-Apr-2025

09:43:05 AM

22

1262.00

CEUX

GENMAB A/S

10-Apr-2025

09:43:06 AM

27

1261.00

CEUX

GENMAB A/S

10-Apr-2025

09:43:29 AM

61

1262.00

XCSE

GENMAB A/S

10-Apr-2025

09:43:29 AM

58

1262.00

CEUX

GENMAB A/S

10-Apr-2025

09:44:26 AM

68

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:44:26 AM

14

1261.00

CEUX

GENMAB A/S

10-Apr-2025

09:44:29 AM

32

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:44:29 AM

20

1260.00

XCSE

1


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

09:44:31 AM

37

1259.00

XCSE

GENMAB A/S

10-Apr-2025

09:44:31 AM

34

1259.50

CEUX

GENMAB A/S

10-Apr-2025

09:44:39 AM

26

1259.00

XCSE

GENMAB A/S

10-Apr-2025

09:45:02 AM

35

1258.00

CEUX

GENMAB A/S

10-Apr-2025

09:45:05 AM

9

1257.50

XCSE

GENMAB A/S

10-Apr-2025

09:45:05 AM

1

1257.50

XCSE

GENMAB A/S

10-Apr-2025

09:45:05 AM

29

1257.50

XCSE

GENMAB A/S

10-Apr-2025

09:45:06 AM

45

1257.50

CEUX

GENMAB A/S

10-Apr-2025

09:45:29 AM

1

1257.50

CEUX

GENMAB A/S

10-Apr-2025

09:45:43 AM

29

1257.50

CEUX

GENMAB A/S

10-Apr-2025

09:45:48 AM

33

1257.00

XCSE

GENMAB A/S

10-Apr-2025

09:45:48 AM

50

1256.50

CEUX

GENMAB A/S

10-Apr-2025

09:45:59 AM

11

1256.00

XCSE

GENMAB A/S

10-Apr-2025

09:46:03 AM

21

1256.00

XCSE

GENMAB A/S

10-Apr-2025

09:46:17 AM

13

1255.00

XCSE

GENMAB A/S

10-Apr-2025

09:46:17 AM

13

1255.00

XCSE

GENMAB A/S

10-Apr-2025

09:46:36 AM

35

1254.00

XCSE

GENMAB A/S

10-Apr-2025

09:46:49 AM

29

1253.50

CEUX

GENMAB A/S

10-Apr-2025

09:47:38 AM

40

1253.00

XCSE

GENMAB A/S

10-Apr-2025

09:48:01 AM

27

1252.50

CEUX

GENMAB A/S

10-Apr-2025

09:48:02 AM

31

1252.00

XCSE

GENMAB A/S

10-Apr-2025

09:48:02 AM

18

1251.50

CEUX

GENMAB A/S

10-Apr-2025

09:48:02 AM

19

1251.50

CEUX

GENMAB A/S

10-Apr-2025

09:48:19 AM

63

1251.50

XCSE

GENMAB A/S

10-Apr-2025

09:48:19 AM

40

1251.00

TQEX

GENMAB A/S

10-Apr-2025

09:48:19 AM

30

1251.50

CEUX

GENMAB A/S

10-Apr-2025

09:48:20 AM

38

1250.50

XCSE

GENMAB A/S

10-Apr-2025

09:48:24 AM

31

1251.00

XCSE

GENMAB A/S

10-Apr-2025

09:48:41 AM

27

1250.00

XCSE

GENMAB A/S

10-Apr-2025

09:48:41 AM

27

1249.50

CEUX

GENMAB A/S

10-Apr-2025

09:48:44 AM

31

1248.50

XCSE

GENMAB A/S

10-Apr-2025

09:49:41 AM

2

1253.50

TQEX

GENMAB A/S

10-Apr-2025

09:49:41 AM

40

1253.50

TQEX

GENMAB A/S

10-Apr-2025

09:50:56 AM

70

1256.00

XCSE

GENMAB A/S

10-Apr-2025

09:51:36 AM

26

1255.50

TQEX

GENMAB A/S

10-Apr-2025

09:51:50 AM

75

1255.00

XCSE

GENMAB A/S

10-Apr-2025

09:51:50 AM

32

1255.00

CEUX

GENMAB A/S

10-Apr-2025

09:53:53 AM

65

1259.00

CEUX

GENMAB A/S

10-Apr-2025

09:54:13 AM

28

1258.50

AQEU

GENMAB A/S

10-Apr-2025

09:55:16 AM

78

1261.00

CEUX

GENMAB A/S

10-Apr-2025

09:55:19 AM

25

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:55:19 AM

57

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:55:19 AM

43

1260.50

TQEX

2


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

09:55:23 AM

75

1260.00

CEUX

GENMAB A/S

10-Apr-2025

09:55:37 AM

82

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:55:37 AM

9

1260.00

TQEX

GENMAB A/S

10-Apr-2025

09:55:37 AM

35

1260.00

TQEX

GENMAB A/S

10-Apr-2025

09:55:37 AM

27

1260.00

CEUX

GENMAB A/S

10-Apr-2025

09:57:00 AM

3

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:57:00 AM

57

1260.50

XCSE

GENMAB A/S

10-Apr-2025

09:57:53 AM

79

1259.50

XCSE

GENMAB A/S

10-Apr-2025

09:59:02 AM

72

1261.50

CEUX

GENMAB A/S

10-Apr-2025

09:59:16 AM

87

1261.00

XCSE

GENMAB A/S

10-Apr-2025

09:59:35 AM

75

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:59:35 AM

9

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:59:35 AM

72

1260.00

CEUX

GENMAB A/S

10-Apr-2025

09:59:55 AM

37

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:59:55 AM

47

1260.00

XCSE

GENMAB A/S

10-Apr-2025

09:59:55 AM

7

1260.00

CEUX

GENMAB A/S

10-Apr-2025

09:59:55 AM

35

1260.00

CEUX

GENMAB A/S

10-Apr-2025

10:00:07 AM

84

1261.00

XCSE

GENMAB A/S

10-Apr-2025

10:00:15 AM

87

1261.00

XCSE

GENMAB A/S

10-Apr-2025

10:00:43 AM

37

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:00:47 AM

25

1260.00

XCSE

GENMAB A/S

10-Apr-2025

10:00:55 AM

57

1260.00

XCSE

GENMAB A/S

10-Apr-2025

10:00:55 AM

29

1260.00

CEUX

GENMAB A/S

10-Apr-2025

10:02:45 AM

40

1259.00

XCSE

GENMAB A/S

10-Apr-2025

10:02:45 AM

49

1259.00

XCSE

GENMAB A/S

10-Apr-2025

10:02:45 AM

26

1259.00

CEUX

GENMAB A/S

10-Apr-2025

10:02:52 AM

54

1259.50

CEUX

GENMAB A/S

10-Apr-2025

10:04:51 AM

79

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:31 AM

20

1262.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:31 AM

1

1262.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:31 AM

63

1262.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:31 AM

1

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:05:31 AM

62

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:05:40 AM

86

1261.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:40 AM

83

1260.00

XCSE

GENMAB A/S

10-Apr-2025

10:05:40 AM

51

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:05:40 AM

43

1260.00

CEUX

GENMAB A/S

10-Apr-2025

10:07:13 AM

34

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:07:13 AM

16

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:07:30 AM

29

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:07:37 AM

60

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:07:56 AM

35

1262.00

TQEX

GENMAB A/S

10-Apr-2025

10:08:01 AM

1

1261.50

CEUX

3


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

10:09:38 AM

1

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:10:12 AM

1

1263.50

TQEX

GENMAB A/S

10-Apr-2025

10:10:27 AM

29

1263.50

TQEX

GENMAB A/S

10-Apr-2025

10:10:29 AM

84

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:10:29 AM

68

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:10:40 AM

43

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:10:40 AM

15

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:10:40 AM

24

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:11:23 AM

29

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:11:23 AM

59

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:11:25 AM

17

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:11:59 AM

10

1263.50

TQEX

GENMAB A/S

10-Apr-2025

10:11:59 AM

13

1263.50

CEUX

GENMAB A/S

10-Apr-2025

10:11:59 AM

69

1263.50

CEUX

GENMAB A/S

10-Apr-2025

10:12:01 AM

19

1263.50

TQEX

GENMAB A/S

10-Apr-2025

10:12:13 AM

20

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:15 AM

12

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:15 AM

3

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:15 AM

30

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:59 AM

43

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:59 AM

32

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:12:59 AM

51

1265.50

TQEX

GENMAB A/S

10-Apr-2025

10:13:00 AM

82

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:13:00 AM

43

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:13:00 AM

11

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:13:00 AM

84

1265.00

CEUX

GENMAB A/S

10-Apr-2025

10:13:05 AM

82

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:13:05 AM

69

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:13:05 AM

81

1264.00

CEUX

GENMAB A/S

10-Apr-2025

10:13:28 AM

65

1262.50

CEUX

GENMAB A/S

10-Apr-2025

10:13:28 AM

13

1262.50

CEUX

GENMAB A/S

10-Apr-2025

10:14:53 AM

83

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:15:45 AM

31

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:16:10 AM

53

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:16:14 AM

4

1262.00

TQEX

GENMAB A/S

10-Apr-2025

10:16:14 AM

41

1262.00

TQEX

GENMAB A/S

10-Apr-2025

10:16:14 AM

43

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:16:14 AM

5

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:16:14 AM

7

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:18:02 AM

16

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:18:02 AM

1

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:18:02 AM

69

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:18:06 AM

29

1261.00

CEUX

4


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

10:19:42 AM

43

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:19:42 AM

30

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:19:42 AM

14

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:19:42 AM

46

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:19:42 AM

20

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:11 AM

18

1263.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:11 AM

15

1263.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:11 AM

45

1263.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:11 AM

15

1263.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:29 AM

47

1263.00

XCSE

GENMAB A/S

10-Apr-2025

10:20:29 AM

77

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:30 AM

82

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:30 AM

6

1262.50

TQEX

GENMAB A/S

10-Apr-2025

10:20:30 AM

16

1262.50

TQEX

GENMAB A/S

10-Apr-2025

10:20:33 AM

11

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:37 AM

82

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:20:37 AM

49

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:37 AM

17

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:37 AM

4

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:37 AM

4

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:20:37 AM

24

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:21:22 AM

16

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:22:57 AM

1

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:22:57 AM

88

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:22:57 AM

27

1262.50

TQEX

GENMAB A/S

10-Apr-2025

10:23:19 AM

56

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:23:19 AM

30

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:23:19 AM

45

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:23:20 AM

10

1260.50

XCSE

GENMAB A/S

10-Apr-2025

10:23:48 AM

88

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:23:48 AM

40

1262.50

CEUX

GENMAB A/S

10-Apr-2025

10:24:30 AM

50

1262.50

TQEX

GENMAB A/S

10-Apr-2025

10:24:57 AM

39

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:24:57 AM

47

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:25:06 AM

50

1261.00

CEUX

GENMAB A/S

10-Apr-2025

10:28:46 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:29:04 AM

25

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:29:05 AM

88

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:30:42 AM

88

1266.50

XCSE

GENMAB A/S

10-Apr-2025

10:30:42 AM

50

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:30:42 AM

30

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:30:42 AM

3

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:30:42 AM

29

1266.00

XCSE

5


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

10:30:42 AM

48

1266.00

TQEX

GENMAB A/S

10-Apr-2025

10:30:42 AM

88

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:30:42 AM

65

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:30:43 AM

4

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:31:55 AM

87

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:31:55 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:32:04 AM

45

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:32:13 AM

26

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:32:17 AM

43

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:32:17 AM

36

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:32:17 AM

3

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:32:21 AM

4

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:32:29 AM

87

1266.00

XCSE

GENMAB A/S

10-Apr-2025

10:32:29 AM

73

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:32:55 AM

84

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:33:00 AM

50

1264.50

CEUX

GENMAB A/S

10-Apr-2025

10:33:28 AM

84

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:36:02 AM

64

1264.50

CEUX

GENMAB A/S

10-Apr-2025

10:36:37 AM

86

1263.50

XCSE

GENMAB A/S

10-Apr-2025

10:36:54 AM

26

1263.00

TQEX

GENMAB A/S

10-Apr-2025

10:36:54 AM

61

1263.00

CEUX

GENMAB A/S

10-Apr-2025

10:37:16 AM

89

1262.50

XCSE

GENMAB A/S

10-Apr-2025

10:37:17 AM

36

1262.00

CEUX

GENMAB A/S

10-Apr-2025

10:37:23 AM

86

1261.50

XCSE

GENMAB A/S

10-Apr-2025

10:39:52 AM

10

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:39:52 AM

36

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:39:52 AM

43

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:39:52 AM

17

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:39:52 AM

6

1264.00

XCSE

GENMAB A/S

10-Apr-2025

10:41:21 AM

8

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:41:21 AM

8

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:41:21 AM

14

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:41:21 AM

26

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:41:25 AM

83

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:41:42 AM

3

1267.00

TQEX

GENMAB A/S

10-Apr-2025

10:42:40 AM

2

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:44:32 AM

8

1266.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:33 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:33 AM

21

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:34 AM

21

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:50 AM

43

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:50 AM

30

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:44:50 AM

36

1267.50

XCSE

6


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

10:46:06 AM

86

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:46:06 AM

30

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:46:06 AM

88

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:46:07 AM

10

1266.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:25 AM

10

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:25 AM

29

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:48:25 AM

3

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:48:25 AM

89

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:48:28 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:28 AM

43

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:28 AM

30

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:32 AM

13

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:32 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:36 AM

71

1266.50

XCSE

GENMAB A/S

10-Apr-2025

10:48:36 AM

28

1266.50

TQEX

GENMAB A/S

10-Apr-2025

10:48:36 AM

1

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:48:36 AM

87

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:49:04 AM

85

1266.50

XCSE

GENMAB A/S

10-Apr-2025

10:49:04 AM

88

1266.50

CEUX

GENMAB A/S

10-Apr-2025

10:49:12 AM

3

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:49:59 AM

1

1265.50

XCSE

GENMAB A/S

10-Apr-2025

10:49:59 AM

1

1265.50

XCSE

GENMAB A/S

10-Apr-2025

10:49:59 AM

1

1265.50

XCSE

GENMAB A/S

10-Apr-2025

10:49:59 AM

85

1265.50

XCSE

GENMAB A/S

10-Apr-2025

10:49:59 AM

1

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:49:59 AM

60

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:49:59 AM

24

1265.50

CEUX

GENMAB A/S

10-Apr-2025

10:50:00 AM

10

1265.00

XCSE

GENMAB A/S

10-Apr-2025

10:51:34 AM

8

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:51:34 AM

63

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:51:35 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:51:35 AM

79

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:52:57 AM

30

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:52:57 AM

46

1267.50

CEUX

GENMAB A/S

10-Apr-2025

10:54:38 AM

81

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:54:38 AM

6

1268.00

XCSE

GENMAB A/S

10-Apr-2025

10:54:38 AM

18

1268.00

CEUX

GENMAB A/S

10-Apr-2025

10:54:38 AM

37

1268.00

CEUX

GENMAB A/S

10-Apr-2025

10:54:38 AM

8

1268.00

CEUX

GENMAB A/S

10-Apr-2025

10:54:57 AM

16

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:56:46 AM

10

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:56:46 AM

20

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:56:46 AM

13

1267.50

XCSE

7


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

10:56:46 AM

2

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:56:46 AM

9

1267.50

TQEX

GENMAB A/S

10-Apr-2025

10:56:58 AM

4

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:56:58 AM

82

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:56:58 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:56:58 AM

20

1267.00

XCSE

GENMAB A/S

10-Apr-2025

10:57:41 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:57:47 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

10:58:57 AM

43

1268.50

XCSE

GENMAB A/S

10-Apr-2025

10:58:57 AM

36

1268.50

XCSE

GENMAB A/S

10-Apr-2025

10:58:57 AM

14

1268.50

XCSE

GENMAB A/S

10-Apr-2025

10:58:57 AM

19

1268.50

XCSE

GENMAB A/S

10-Apr-2025

10:58:57 AM

86

1268.00

CEUX

GENMAB A/S

10-Apr-2025

10:59:25 AM

18

1269.50

XCSE

GENMAB A/S

10-Apr-2025

10:59:25 AM

28

1269.50

XCSE

GENMAB A/S

10-Apr-2025

10:59:47 AM

14

1269.50

XCSE

GENMAB A/S

10-Apr-2025

10:59:55 AM

4

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:00:04 AM

1

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:01:33 AM

83

1270.50

XCSE

GENMAB A/S

10-Apr-2025

11:01:33 AM

35

1271.00

XCSE

GENMAB A/S

10-Apr-2025

11:01:33 AM

43

1271.00

XCSE

GENMAB A/S

10-Apr-2025

11:01:33 AM

34

1271.00

XCSE

GENMAB A/S

10-Apr-2025

11:01:33 AM

26

1270.50

TQEX

GENMAB A/S

10-Apr-2025

11:01:33 AM

34

1271.00

CEUX

GENMAB A/S

10-Apr-2025

11:01:33 AM

51

1271.00

CEUX

GENMAB A/S

10-Apr-2025

11:01:49 AM

27

1270.00

CEUX

GENMAB A/S

10-Apr-2025

11:01:49 AM

61

1270.00

CEUX

GENMAB A/S

10-Apr-2025

11:02:02 AM

83

1269.50

XCSE

GENMAB A/S

10-Apr-2025

11:02:02 AM

35

1269.50

TQEX

GENMAB A/S

10-Apr-2025

11:04:07 AM

83

1270.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:07 AM

89

1269.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:07 AM

50

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:04:07 AM

23

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:04:07 AM

1

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:07 AM

50

1269.50

AQEU

GENMAB A/S

10-Apr-2025

11:04:07 AM

76

1270.00

CEUX

GENMAB A/S

10-Apr-2025

11:04:07 AM

51

1269.00

CEUX

GENMAB A/S

10-Apr-2025

11:04:07 AM

34

1269.00

CEUX

GENMAB A/S

10-Apr-2025

11:04:08 AM

10

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:08 AM

70

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:53 AM

25

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:53 AM

57

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:04:53 AM

81

1267.50

CEUX

8


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

11:04:53 AM

1

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:05:13 AM

45

1268.00

XCSE

GENMAB A/S

10-Apr-2025

11:05:41 AM

57

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:05:41 AM

26

1267.00

TQEX

GENMAB A/S

10-Apr-2025

11:05:41 AM

26

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:05:42 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:05:50 AM

13

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:05:50 AM

3

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:06:03 AM

26

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:06:07 AM

6

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:06:07 AM

31

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:06:07 AM

50

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:06:07 AM

31

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:06:07 AM

16

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:08:07 AM

28

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:08:57 AM

59

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:08:57 AM

8

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:22 AM

10

1267.00

TQEX

GENMAB A/S

10-Apr-2025

11:10:31 AM

16

1267.00

TQEX

GENMAB A/S

10-Apr-2025

11:10:43 AM

1

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:43 AM

9

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:43 AM

72

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:43 AM

5

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:43 AM

9

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:10:43 AM

28

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:10:47 AM

54

1265.50

XCSE

GENMAB A/S

10-Apr-2025

11:10:47 AM

26

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:13:40 AM

30

1268.00

TQEX

GENMAB A/S

10-Apr-2025

11:14:12 AM

89

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:14:12 AM

24

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:14:12 AM

16

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:15:28 AM

89

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:15:28 AM

26

1267.00

TQEX

GENMAB A/S

10-Apr-2025

11:15:28 AM

57

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:15:34 AM

8

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:16:29 AM

77

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:16:29 AM

14

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:16:29 AM

25

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:18:21 AM

18

1265.50

XCSE

GENMAB A/S

10-Apr-2025

11:18:21 AM

44

1265.50

XCSE

GENMAB A/S

10-Apr-2025

11:18:21 AM

18

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:18:21 AM

9

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:18:29 AM

21

1265.50

AQEU

9


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

11:18:35 AM

28

1265.50

AQEU

GENMAB A/S

10-Apr-2025

11:21:17 AM

25

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:21:42 AM

62

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:21:42 AM

20

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:21:42 AM

66

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:22:01 AM

21

1266.00

CEUX

GENMAB A/S

10-Apr-2025

11:23:14 AM

82

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:23:14 AM

10

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:23:14 AM

16

1268.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:19 AM

16

1268.00

XCSE

GENMAB A/S

10-Apr-2025

11:25:19 AM

53

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:19 AM

16

1268.00

TQEX

GENMAB A/S

10-Apr-2025

11:25:19 AM

21

1268.00

TQEX

GENMAB A/S

10-Apr-2025

11:25:19 AM

87

1268.00

CEUX

GENMAB A/S

10-Apr-2025

11:25:38 AM

16

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:38 AM

19

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:38 AM

41

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:59 AM

36

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:25:59 AM

1

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:26:05 AM

10

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:26:05 AM

26

1267.00

TQEX

GENMAB A/S

10-Apr-2025

11:26:05 AM

23

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:26:05 AM

60

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:26:50 AM

88

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:26:57 AM

62

1266.00

CEUX

GENMAB A/S

10-Apr-2025

11:27:52 AM

36

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:27:52 AM

36

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:27:52 AM

40

1266.50

XCSE

GENMAB A/S

10-Apr-2025

11:28:11 AM

86

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:28:11 AM

61

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:28:11 AM

10

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:29:54 AM

83

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:29:54 AM

32

1266.00

TQEX

GENMAB A/S

10-Apr-2025

11:29:54 AM

13

1265.50

CEUX

GENMAB A/S

10-Apr-2025

11:32:35 AM

55

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:32:35 AM

57

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:32:40 AM

85

1271.50

XCSE

GENMAB A/S

10-Apr-2025

11:32:40 AM

86

1272.00

CEUX

GENMAB A/S

10-Apr-2025

11:32:41 AM

26

1271.50

TQEX

GENMAB A/S

10-Apr-2025

11:32:41 AM

29

1271.50

AQEU

GENMAB A/S

10-Apr-2025

11:37:34 AM

11

1273.50

XCSE

GENMAB A/S

10-Apr-2025

11:37:34 AM

97

1273.50

XCSE

GENMAB A/S

10-Apr-2025

11:37:34 AM

11

1273.50

TQEX

10


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

11:37:34 AM

11

1273.50

CEUX

GENMAB A/S

10-Apr-2025

11:37:34 AM

74

1273.50

CEUX

GENMAB A/S

10-Apr-2025

11:37:35 AM

43

1273.50

XCSE

GENMAB A/S

10-Apr-2025

11:37:35 AM

60

1273.50

XCSE

GENMAB A/S

10-Apr-2025

11:37:35 AM

9

1273.50

XCSE

GENMAB A/S

10-Apr-2025

11:37:35 AM

26

1273.50

AQEU

GENMAB A/S

10-Apr-2025

11:38:50 AM

83

1272.50

XCSE

GENMAB A/S

10-Apr-2025

11:38:50 AM

28

1272.50

AQEU

GENMAB A/S

10-Apr-2025

11:38:50 AM

86

1272.50

CEUX

GENMAB A/S

10-Apr-2025

11:39:32 AM

82

1271.50

XCSE

GENMAB A/S

10-Apr-2025

11:39:32 AM

43

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:39:32 AM

28

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:39:32 AM

30

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:39:32 AM

11

1272.00

XCSE

GENMAB A/S

10-Apr-2025

11:39:36 AM

17

1271.50

XCSE

GENMAB A/S

10-Apr-2025

11:40:05 AM

72

1271.50

XCSE

GENMAB A/S

10-Apr-2025

11:40:41 AM

85

1271.50

XCSE

GENMAB A/S

10-Apr-2025

11:40:41 AM

4

1271.50

AQEU

GENMAB A/S

10-Apr-2025

11:40:41 AM

4

1271.50

AQEU

GENMAB A/S

10-Apr-2025

11:40:41 AM

30

1271.50

AQEU

GENMAB A/S

10-Apr-2025

11:40:42 AM

82

1271.00

CEUX

GENMAB A/S

10-Apr-2025

11:40:44 AM

31

1271.00

TQEX

GENMAB A/S

10-Apr-2025

11:40:51 AM

87

1270.50

XCSE

GENMAB A/S

10-Apr-2025

11:42:48 AM

73

1270.00

CEUX

GENMAB A/S

10-Apr-2025

11:42:48 AM

16

1270.00

CEUX

GENMAB A/S

10-Apr-2025

11:43:43 AM

69

1269.00

XCSE

GENMAB A/S

10-Apr-2025

11:43:43 AM

17

1269.00

XCSE

GENMAB A/S

10-Apr-2025

11:43:43 AM

28

1269.00

TQEX

GENMAB A/S

10-Apr-2025

11:43:43 AM

83

1269.00

CEUX

GENMAB A/S

10-Apr-2025

11:44:04 AM

77

1268.50

CEUX

GENMAB A/S

10-Apr-2025

11:45:09 AM

88

1269.00

XCSE

GENMAB A/S

10-Apr-2025

11:46:03 AM

81

1268.00

XCSE

GENMAB A/S

10-Apr-2025

11:47:21 AM

86

1267.50

CEUX

GENMAB A/S

10-Apr-2025

11:47:27 AM

28

1267.00

XCSE

GENMAB A/S

10-Apr-2025

11:47:40 AM

4

1266.50

TQEX

GENMAB A/S

10-Apr-2025

11:47:40 AM

1

1266.50

TQEX

GENMAB A/S

10-Apr-2025

11:47:40 AM

1

1266.50

TQEX

GENMAB A/S

10-Apr-2025

11:47:40 AM

74

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:47:40 AM

12

1266.50

CEUX

GENMAB A/S

10-Apr-2025

11:50:42 AM

41

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:50:42 AM

28

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:50:42 AM

16

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:50:42 AM

27

1267.50

XCSE

11


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

11:52:38 AM

86

1267.50

XCSE

GENMAB A/S

10-Apr-2025

11:52:38 AM

37

1267.50

TQEX

GENMAB A/S

10-Apr-2025

11:52:39 AM

10

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:52:46 AM

39

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:52:46 AM

36

1267.00

CEUX

GENMAB A/S

10-Apr-2025

11:52:47 AM

10

1266.00

XCSE

GENMAB A/S

10-Apr-2025

11:55:16 AM

76

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:55:16 AM

13

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:55:16 AM

16

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:55:17 AM

15

1269.50

CEUX

GENMAB A/S

10-Apr-2025

11:55:19 AM

11

1269.50

CEUX

GENMAB A/S

10-Apr-2025

11:55:21 AM

1

1269.50

TQEX

GENMAB A/S

10-Apr-2025

11:56:48 AM

88

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:57:15 AM

85

1270.50

XCSE

GENMAB A/S

10-Apr-2025

11:57:15 AM

87

1270.50

CEUX

GENMAB A/S

10-Apr-2025

11:58:48 AM

82

1270.00

XCSE

GENMAB A/S

10-Apr-2025

11:58:59 AM

9

1269.50

TQEX

GENMAB A/S

10-Apr-2025

11:58:59 AM

20

1269.50

CEUX

GENMAB A/S

10-Apr-2025

11:59:21 AM

39

1269.50

CEUX

GENMAB A/S

10-Apr-2025

11:59:22 AM

87

1269.00

XCSE

GENMAB A/S

10-Apr-2025

11:59:22 AM

19

1269.50

TQEX

GENMAB A/S

10-Apr-2025

12:00:58 PM

84

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:00:58 PM

13

1268.50

TQEX

GENMAB A/S

10-Apr-2025

12:00:58 PM

1

1268.50

TQEX

GENMAB A/S

10-Apr-2025

12:02:02 PM

23

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:02:02 PM

10

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:02:32 PM

43

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:02:32 PM

23

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:02:32 PM

19

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:03:41 PM

84

1268.00

XCSE

GENMAB A/S

10-Apr-2025

12:03:41 PM

38

1268.50

XCSE

GENMAB A/S

10-Apr-2025

12:03:41 PM

31

1268.00

TQEX

GENMAB A/S

10-Apr-2025

12:03:41 PM

21

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:03:41 PM

23

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:03:41 PM

41

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:04:46 PM

4

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:04:46 PM

83

1269.00

XCSE

GENMAB A/S

10-Apr-2025

12:04:46 PM

86

1269.00

CEUX

GENMAB A/S

10-Apr-2025

12:04:56 PM

88

1268.00

XCSE

GENMAB A/S

10-Apr-2025

12:04:56 PM

48

1268.50

AQEU

GENMAB A/S

10-Apr-2025

12:04:56 PM

8

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:04:56 PM

14

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:04:56 PM

13

1268.00

CEUX

12


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

12:04:56 PM

9

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:05:59 PM

25

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:05:59 PM

4

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:06:08 PM

14

1268.00

CEUX

GENMAB A/S

10-Apr-2025

12:08:30 PM

34

1271.00

XCSE

GENMAB A/S

10-Apr-2025

12:08:30 PM

13

1271.00

XCSE

GENMAB A/S

10-Apr-2025

12:08:36 PM

79

1272.00

XCSE

GENMAB A/S

10-Apr-2025

12:08:36 PM

9

1272.00

XCSE

GENMAB A/S

10-Apr-2025

12:08:58 PM

28

1272.00

TQEX

GENMAB A/S

10-Apr-2025

12:09:25 PM

21

1273.50

XCSE

GENMAB A/S

10-Apr-2025

12:09:25 PM

10

1273.50

CEUX

GENMAB A/S

10-Apr-2025

12:09:28 PM

10

1273.50

XCSE

GENMAB A/S

10-Apr-2025

12:09:28 PM

19

1273.50

CEUX

GENMAB A/S

10-Apr-2025

12:09:28 PM

57

1273.50

CEUX

GENMAB A/S

10-Apr-2025

12:09:29 PM

56

1273.50

XCSE

GENMAB A/S

10-Apr-2025

12:09:29 PM

26

1273.00

TQEX

GENMAB A/S

10-Apr-2025

12:09:50 PM

23

1273.00

XCSE

GENMAB A/S

10-Apr-2025

12:09:50 PM

63

1273.00

XCSE

GENMAB A/S

10-Apr-2025

12:11:26 PM

86

1274.00

XCSE

GENMAB A/S

10-Apr-2025

12:12:01 PM

6

1273.00

XCSE

GENMAB A/S

10-Apr-2025

12:12:01 PM

85

1273.50

CEUX

GENMAB A/S

10-Apr-2025

12:12:02 PM

78

1273.00

XCSE

GENMAB A/S

10-Apr-2025

12:13:31 PM

82

1276.00

XCSE

GENMAB A/S

10-Apr-2025

12:13:31 PM

48

1275.50

TQEX

GENMAB A/S

10-Apr-2025

12:16:07 PM

88

1276.00

XCSE

GENMAB A/S

10-Apr-2025

12:16:44 PM

71

1275.00

XCSE

GENMAB A/S

10-Apr-2025

12:16:57 PM

13

1275.00

XCSE

GENMAB A/S

10-Apr-2025

12:16:57 PM

89

1275.00

CEUX

GENMAB A/S

10-Apr-2025

12:17:23 PM

86

1275.00

XCSE

GENMAB A/S

10-Apr-2025

12:20:07 PM

7

1276.50

CEUX

GENMAB A/S

10-Apr-2025

12:21:40 PM

89

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:21:40 PM

32

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:21:47 PM

15

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:22:17 PM

73

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:23:01 PM

49

1278.00

TQEX

GENMAB A/S

10-Apr-2025

12:23:02 PM

15

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:23:34 PM

10

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:23:34 PM

30

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:24:17 PM

68

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:24:17 PM

10

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:24:17 PM

34

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:24:17 PM

34

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:24:17 PM

48

1277.50

CEUX

13


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

12:25:05 PM

62

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:25:05 PM

17

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:25:05 PM

10

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:25:52 PM

45

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:26:28 PM

18

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:26:28 PM

71

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:27:21 PM

40

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:27:52 PM

15

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:27:55 PM

74

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:28:02 PM

41

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:29:59 PM

89

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:29:59 PM

47

1279.00

TQEX

GENMAB A/S

10-Apr-2025

12:29:59 PM

26

1279.00

AQEU

GENMAB A/S

10-Apr-2025

12:29:59 PM

84

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:31:32 PM

27

1280.00

AQEU

GENMAB A/S

10-Apr-2025

12:31:57 PM

46

1280.00

XCSE

GENMAB A/S

10-Apr-2025

12:31:57 PM

11

1280.00

XCSE

GENMAB A/S

10-Apr-2025

12:31:57 PM

55

1280.00

XCSE

GENMAB A/S

10-Apr-2025

12:32:04 PM

84

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:32:04 PM

82

1279.50

CEUX

GENMAB A/S

10-Apr-2025

12:32:05 PM

40

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:33:00 PM

20

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:33:00 PM

12

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:33:07 PM

2

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:33:40 PM

4

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:34:00 PM

4

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:34:00 PM

9

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:35:00 PM

3

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:35:04 PM

4

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:35:04 PM

1

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:35:04 PM

22

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:35:06 PM

107

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:35:06 PM

5

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:35:09 PM

19

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:35:09 PM

25

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:36:33 PM

10

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:36:33 PM

74

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:37:44 PM

26

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:38:11 PM

13

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:38:12 PM

87

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:40:20 PM

99

1280.00

XCSE

GENMAB A/S

10-Apr-2025

12:40:50 PM

35

1279.50

CEUX

GENMAB A/S

10-Apr-2025

12:40:50 PM

49

1279.50

CEUX

14


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

12:41:38 PM

82

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:41:38 PM

60

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:41:38 PM

30

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:41:38 PM

22

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:41:49 PM

50

1278.50

TQEX

GENMAB A/S

10-Apr-2025

12:41:49 PM

42

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:41:49 PM

40

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:41:58 PM

40

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:41:58 PM

9

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:43:38 PM

15

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:43:50 PM

24

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:45:14 PM

53

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:46:26 PM

16

1277.50

XCSE

GENMAB A/S

10-Apr-2025

12:46:52 PM

15

1277.50

XCSE

GENMAB A/S

10-Apr-2025

12:48:28 PM

60

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:48:28 PM

2

1278.50

TQEX

GENMAB A/S

10-Apr-2025

12:48:28 PM

84

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:50:00 PM

26

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:50:00 PM

60

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:50:00 PM

26

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:50:00 PM

26

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:51:48 PM

83

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:52:20 PM

26

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:52:32 PM

32

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:53:10 PM

13

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:53:10 PM

13

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:53:10 PM

59

1278.50

CEUX

GENMAB A/S

10-Apr-2025

12:53:11 PM

25

1278.50

TQEX

GENMAB A/S

10-Apr-2025

12:53:11 PM

1

1278.50

TQEX

GENMAB A/S

10-Apr-2025

12:53:11 PM

18

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:53:11 PM

31

1278.50

AQEU

GENMAB A/S

10-Apr-2025

12:53:17 PM

83

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:53:17 PM

48

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:53:17 PM

7

1278.50

XCSE

GENMAB A/S

10-Apr-2025

12:53:17 PM

9

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:53:17 PM

2

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:53:17 PM

74

1277.50

CEUX

GENMAB A/S

10-Apr-2025

12:54:10 PM

88

1277.00

XCSE

GENMAB A/S

10-Apr-2025

12:54:15 PM

13

1276.50

AQEU

GENMAB A/S

10-Apr-2025

12:57:02 PM

14

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:57:22 PM

27

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:58:04 PM

16

1278.00

CEUX

GENMAB A/S

10-Apr-2025

12:58:19 PM

28

1278.50

XCSE

15


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

12:58:19 PM

58

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:58:19 PM

16

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:58:19 PM

10

1279.00

XCSE

GENMAB A/S

10-Apr-2025

12:58:20 PM

89

1278.00

XCSE

GENMAB A/S

10-Apr-2025

12:58:20 PM

26

1278.00

TQEX

GENMAB A/S

10-Apr-2025

12:58:20 PM

8

1278.00

TQEX

GENMAB A/S

10-Apr-2025

12:58:20 PM

68

1278.00

CEUX

GENMAB A/S

10-Apr-2025

13:01:35 PM

85

1278.00

CEUX

GENMAB A/S

10-Apr-2025

13:01:36 PM

15

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:05 PM

35

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:05 PM

16

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:14 PM

28

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:02:42 PM

35

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:42 PM

10

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:42 PM

60

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:02:42 PM

7

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:04:15 PM

28

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:04:41 PM

89

1277.00

XCSE

GENMAB A/S

10-Apr-2025

13:04:41 PM

14

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:04:41 PM

14

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:04:41 PM

35

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:04:41 PM

42

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:04:41 PM

82

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:05:00 PM

21

1276.50

AQEU

GENMAB A/S

10-Apr-2025

13:06:28 PM

87

1276.00

CEUX

GENMAB A/S

10-Apr-2025

13:06:44 PM

89

1275.50

XCSE

GENMAB A/S

10-Apr-2025

13:09:12 PM

13

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:09:12 PM

36

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:09:12 PM

10

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:09:12 PM

12

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:10:02 PM

1

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:10:02 PM

30

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:10:02 PM

4

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:10:40 PM

11

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:11:01 PM

10

1275.50

AQEU

GENMAB A/S

10-Apr-2025

13:11:01 PM

16

1275.50

AQEU

GENMAB A/S

10-Apr-2025

13:11:28 PM

40

1275.50

XCSE

GENMAB A/S

10-Apr-2025

13:11:28 PM

45

1275.50

XCSE

GENMAB A/S

10-Apr-2025

13:14:06 PM

19

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:14:19 PM

32

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:14:36 PM

26

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:14:37 PM

18

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:15:49 PM

32

1277.00

TQEX

16


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

13:15:49 PM

32

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:16:22 PM

44

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:16:22 PM

46

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:16:22 PM

22

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:16:22 PM

17

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:16:22 PM

70

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:16:22 PM

26

1276.50

AQEU

GENMAB A/S

10-Apr-2025

13:16:22 PM

32

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:16:22 PM

85

1276.00

CEUX

GENMAB A/S

10-Apr-2025

13:16:48 PM

15

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:16:54 PM

13

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:16:55 PM

12

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:17:05 PM

14

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:17:05 PM

39

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:17:23 PM

4

1276.00

CEUX

GENMAB A/S

10-Apr-2025

13:20:41 PM

29

1280.00

TQEX

GENMAB A/S

10-Apr-2025

13:20:41 PM

36

1280.00

CEUX

GENMAB A/S

10-Apr-2025

13:21:03 PM

15

1280.00

XCSE

GENMAB A/S

10-Apr-2025

13:21:03 PM

13

1280.00

XCSE

GENMAB A/S

10-Apr-2025

13:24:13 PM

89

1281.50

XCSE

GENMAB A/S

10-Apr-2025

13:24:13 PM

33

1281.50

XCSE

GENMAB A/S

10-Apr-2025

13:24:13 PM

40

1281.50

CEUX

GENMAB A/S

10-Apr-2025

13:25:19 PM

12

1281.00

TQEX

GENMAB A/S

10-Apr-2025

13:25:19 PM

14

1281.00

TQEX

GENMAB A/S

10-Apr-2025

13:25:19 PM

46

1281.00

CEUX

GENMAB A/S

10-Apr-2025

13:25:19 PM

42

1281.00

CEUX

GENMAB A/S

10-Apr-2025

13:25:31 PM

36

1281.50

CEUX

GENMAB A/S

10-Apr-2025

13:26:08 PM

32

1281.00

XCSE

GENMAB A/S

10-Apr-2025

13:26:08 PM

26

1281.00

AQEU

GENMAB A/S

10-Apr-2025

13:26:28 PM

83

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:30 PM

13

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:30 PM

30

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:30 PM

45

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:30 PM

24

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:30 PM

28

1280.00

TQEX

GENMAB A/S

10-Apr-2025

13:26:30 PM

1

1280.00

CEUX

GENMAB A/S

10-Apr-2025

13:26:30 PM

85

1280.00

CEUX

GENMAB A/S

10-Apr-2025

13:26:31 PM

14

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:31 PM

14

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:31 PM

30

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:31 PM

35

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:31 PM

30

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:26:31 PM

13

1280.50

XCSE

17


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

13:26:32 PM

46

1280.50

XCSE

GENMAB A/S

10-Apr-2025

13:27:00 PM

83

1279.50

XCSE

GENMAB A/S

10-Apr-2025

13:27:14 PM

86

1279.00

CEUX

GENMAB A/S

10-Apr-2025

13:28:03 PM

87

1278.00

XCSE

GENMAB A/S

10-Apr-2025

13:28:04 PM

3

1277.50

CEUX

GENMAB A/S

10-Apr-2025

13:28:09 PM

26

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:28:09 PM

1

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:28:09 PM

2

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:28:09 PM

80

1277.50

CEUX

GENMAB A/S

10-Apr-2025

13:30:07 PM

5

1276.50

CEUX

GENMAB A/S

10-Apr-2025

13:30:19 PM

84

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:30:19 PM

5

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:30:19 PM

21

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:30:19 PM

79

1276.50

CEUX

GENMAB A/S

10-Apr-2025

13:31:11 PM

86

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:31:11 PM

27

1277.50

CEUX

GENMAB A/S

10-Apr-2025

13:31:11 PM

55

1277.50

CEUX

GENMAB A/S

10-Apr-2025

13:31:19 PM

26

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:31:19 PM

56

1276.50

XCSE

GENMAB A/S

10-Apr-2025

13:31:19 PM

80

1276.50

CEUX

GENMAB A/S

10-Apr-2025

13:35:00 PM

36

1278.50

XCSE

GENMAB A/S

10-Apr-2025

13:35:00 PM

63

1278.00

CEUX

GENMAB A/S

10-Apr-2025

13:35:32 PM

75

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:36:12 PM

2

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:36:12 PM

3

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:36:12 PM

5

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:36:36 PM

11

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:36:36 PM

38

1277.50

TQEX

GENMAB A/S

10-Apr-2025

13:36:52 PM

5

1277.50

XCSE

GENMAB A/S

10-Apr-2025

13:36:53 PM

3

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:36:53 PM

2

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:36:59 PM

22

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:36:59 PM

9

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:37:00 PM

42

1277.00

XCSE

GENMAB A/S

10-Apr-2025

13:37:00 PM

4

1277.00

CEUX

GENMAB A/S

10-Apr-2025

13:41:26 PM

85

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:41:26 PM

63

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:41:26 PM

13

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:41:26 PM

40

1276.00

CEUX

GENMAB A/S

10-Apr-2025

13:41:26 PM

12

1276.00

CEUX

GENMAB A/S

10-Apr-2025

13:41:42 PM

30

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:42:10 PM

35

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:42:11 PM

35

1276.00

XCSE

18


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

13:42:11 PM

31

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:42:52 PM

35

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:42:52 PM

10

1276.00

XCSE

GENMAB A/S

10-Apr-2025

13:42:59 PM

32

1275.00

AQEU

GENMAB A/S

10-Apr-2025

13:43:04 PM

63

1275.00

CEUX

GENMAB A/S

10-Apr-2025

13:44:59 PM

83

1275.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

89

1274.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

88

1272.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

45

1271.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

30

1271.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

10

1271.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

41

1270.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

41

1270.00

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

87

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

9

1267.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

76

1267.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

30

1266.50

XCSE

GENMAB A/S

10-Apr-2025

13:44:59 PM

50

1275.00

TQEX

GENMAB A/S

10-Apr-2025

13:44:59 PM

7

1275.00

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

27

1270.00

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

76

1269.00

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

9

1267.50

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

2

1267.50

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

54

1267.50

AQEU

GENMAB A/S

10-Apr-2025

13:44:59 PM

63

1274.00

CEUX

GENMAB A/S

10-Apr-2025

13:44:59 PM

84

1272.50

CEUX

GENMAB A/S

10-Apr-2025

13:44:59 PM

87

1271.00

CEUX

GENMAB A/S

10-Apr-2025

13:44:59 PM

87

1270.00

CEUX

GENMAB A/S

10-Apr-2025

13:45:00 PM

72

1261.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:00 PM

79

1260.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:00 PM

71

1259.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:00 PM

49

1257.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:02 PM

43

1263.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:03 PM

28

1265.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:04 PM

30

1265.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

30

1264.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

28

1263.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

28

1262.50

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

26

1263.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

26

1262.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

20

1261.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

14

1261.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:08 PM

32

1260.00

AQEU

19


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

13:45:10 PM

45

1264.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:10 PM

41

1263.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:10 PM

37

1262.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:29 PM

27

1267.00

AQEU

GENMAB A/S

10-Apr-2025

13:45:41 PM

27

1266.50

CEUX

GENMAB A/S

10-Apr-2025

13:45:48 PM

29

1267.50

XCSE

GENMAB A/S

10-Apr-2025

13:45:48 PM

27

1267.00

AQEU

GENMAB A/S

10-Apr-2025

13:47:15 PM

34

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:47:49 PM

26

1268.00

AQEU

GENMAB A/S

10-Apr-2025

13:47:50 PM

38

1268.00

XCSE

GENMAB A/S

10-Apr-2025

13:47:50 PM

31

1267.50

CEUX

GENMAB A/S

10-Apr-2025

13:47:51 PM

25

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:47:51 PM

13

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:47:51 PM

31

1267.00

AQEU

GENMAB A/S

10-Apr-2025

13:49:40 PM

37

1267.50

CEUX

GENMAB A/S

10-Apr-2025

13:50:21 PM

5

1269.00

AQEU

GENMAB A/S

10-Apr-2025

13:51:43 PM

35

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:51:43 PM

26

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:51:43 PM

49

1268.50

TQEX

GENMAB A/S

10-Apr-2025

13:51:43 PM

26

1269.00

AQEU

GENMAB A/S

10-Apr-2025

13:51:43 PM

3

1269.00

AQEU

GENMAB A/S

10-Apr-2025

13:51:43 PM

32

1268.50

CEUX

GENMAB A/S

10-Apr-2025

13:51:43 PM

2

1268.50

CEUX

GENMAB A/S

10-Apr-2025

13:53:22 PM

31

1269.00

CEUX

GENMAB A/S

10-Apr-2025

13:53:25 PM

33

1269.00

AQEU

GENMAB A/S

10-Apr-2025

13:53:25 PM

43

1269.00

CEUX

GENMAB A/S

10-Apr-2025

13:53:36 PM

86

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:53:58 PM

27

1268.00

AQEU

GENMAB A/S

10-Apr-2025

13:53:59 PM

34

1267.50

CEUX

GENMAB A/S

10-Apr-2025

13:54:02 PM

65

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:54:08 PM

20

1266.50

CEUX

GENMAB A/S

10-Apr-2025

13:54:08 PM

20

1266.50

CEUX

GENMAB A/S

10-Apr-2025

13:54:44 PM

35

1266.00

XCSE

GENMAB A/S

10-Apr-2025

13:56:30 PM

6

1266.50

AQEU

GENMAB A/S

10-Apr-2025

13:57:10 PM

50

1270.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:10 PM

7

1270.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:10 PM

27

1270.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:10 PM

85

1269.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:10 PM

33

1270.00

TQEX

GENMAB A/S

10-Apr-2025

13:57:10 PM

26

1270.00

AQEU

GENMAB A/S

10-Apr-2025

13:57:10 PM

36

1270.00

CEUX

GENMAB A/S

10-Apr-2025

13:57:10 PM

32

1270.00

CEUX

GENMAB A/S

10-Apr-2025

13:57:10 PM

72

1269.00

CEUX

20


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

13:57:11 PM

10

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:14 PM

78

1268.50

XCSE

GENMAB A/S

10-Apr-2025

13:57:14 PM

26

1268.50

AQEU

GENMAB A/S

10-Apr-2025

13:57:55 PM

10

1268.00

CEUX

GENMAB A/S

10-Apr-2025

13:57:55 PM

63

1268.00

CEUX

GENMAB A/S

10-Apr-2025

13:58:59 PM

9

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:58:59 PM

77

1267.00

XCSE

GENMAB A/S

10-Apr-2025

13:58:59 PM

27

1267.00

AQEU

GENMAB A/S

10-Apr-2025

13:59:09 PM

16

1266.00

CEUX

GENMAB A/S

10-Apr-2025

13:59:09 PM

17

1266.00

CEUX

GENMAB A/S

10-Apr-2025

13:59:34 PM

5

1265.50

XCSE

GENMAB A/S

10-Apr-2025

13:59:34 PM

23

1265.50

XCSE

GENMAB A/S

10-Apr-2025

13:59:47 PM

12

1266.00

CEUX

GENMAB A/S

10-Apr-2025

13:59:48 PM

15

1266.00

CEUX

GENMAB A/S

10-Apr-2025

14:00:19 PM

30

1267.00

TQEX

GENMAB A/S

10-Apr-2025

14:00:39 PM

83

1266.50

XCSE

GENMAB A/S

10-Apr-2025

14:00:39 PM

27

1266.50

CEUX

GENMAB A/S

10-Apr-2025

14:03:46 PM

11

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:03:54 PM

10

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:01 PM

2

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:10 PM

10

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:10 PM

2

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:10 PM

54

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:10 PM

40

1267.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:10 PM

27

1267.50

TQEX

GENMAB A/S

10-Apr-2025

14:04:10 PM

53

1267.00

CEUX

GENMAB A/S

10-Apr-2025

14:04:14 PM

44

1266.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:14 PM

2

1266.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:14 PM

37

1266.50

XCSE

GENMAB A/S

10-Apr-2025

14:04:15 PM

21

1266.00

CEUX

GENMAB A/S

10-Apr-2025

14:04:15 PM

8

1266.00

CEUX

GENMAB A/S

10-Apr-2025

14:04:15 PM

1

1266.00

CEUX

GENMAB A/S

10-Apr-2025

14:05:21 PM

2

1266.00

CEUX

GENMAB A/S

10-Apr-2025

14:05:21 PM

47

1266.00

AQEU

GENMAB A/S

10-Apr-2025

14:05:27 PM

10

1266.00

XCSE

GENMAB A/S

10-Apr-2025

14:05:27 PM

10

1266.00

XCSE

GENMAB A/S

10-Apr-2025

14:05:27 PM

22

1266.00

XCSE

GENMAB A/S

10-Apr-2025

14:05:27 PM

22

1265.50

XCSE

GENMAB A/S

10-Apr-2025

14:05:27 PM

34

1265.50

XCSE

GENMAB A/S

10-Apr-2025

14:07:10 PM

50

1265.00

XCSE

GENMAB A/S

10-Apr-2025

14:07:10 PM

34

1265.00

XCSE

GENMAB A/S

10-Apr-2025

14:07:10 PM

5

1265.50

XCSE

GENMAB A/S

10-Apr-2025

14:07:10 PM

28

1265.00

CEUX

21


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:07:48 PM

83

1264.00

XCSE

GENMAB A/S

10-Apr-2025

14:07:48 PM

29

1264.00

TQEX

GENMAB A/S

10-Apr-2025

14:07:48 PM

39

1264.00

CEUX

GENMAB A/S

10-Apr-2025

14:07:49 PM

25

1264.00

AQEU

GENMAB A/S

10-Apr-2025

14:09:25 PM

85

1264.00

CEUX

GENMAB A/S

10-Apr-2025

14:09:26 PM

32

1264.50

XCSE

GENMAB A/S

10-Apr-2025

14:09:26 PM

51

1264.50

XCSE

GENMAB A/S

10-Apr-2025

14:09:28 PM

84

1263.50

XCSE

GENMAB A/S

10-Apr-2025

14:09:28 PM

37

1262.50

XCSE

GENMAB A/S

10-Apr-2025

14:09:28 PM

50

1263.50

TQEX

GENMAB A/S

10-Apr-2025

14:09:28 PM

1

1263.00

CEUX

GENMAB A/S

10-Apr-2025

14:09:28 PM

34

1263.00

CEUX

GENMAB A/S

10-Apr-2025

14:09:28 PM

40

1263.00

CEUX

GENMAB A/S

10-Apr-2025

14:09:30 PM

39

1262.50

XCSE

GENMAB A/S

10-Apr-2025

14:10:03 PM

10

1262.50

XCSE

GENMAB A/S

10-Apr-2025

14:10:04 PM

76

1261.50

CEUX

GENMAB A/S

10-Apr-2025

14:10:05 PM

20

1261.00

XCSE

GENMAB A/S

10-Apr-2025

14:10:05 PM

64

1261.00

XCSE

GENMAB A/S

10-Apr-2025

14:10:15 PM

80

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:10:15 PM

20

1260.50

CEUX

GENMAB A/S

10-Apr-2025

14:10:15 PM

19

1260.50

CEUX

GENMAB A/S

10-Apr-2025

14:10:18 PM

7

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:10:18 PM

1

1259.50

AQEU

GENMAB A/S

10-Apr-2025

14:10:19 PM

4

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:10:19 PM

6

1259.50

AQEU

GENMAB A/S

10-Apr-2025

14:10:21 PM

33

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:11:51 PM

24

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:11:52 PM

22

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:11:52 PM

43

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:12:01 PM

69

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:12:01 PM

18

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:12:01 PM

5

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:01 PM

20

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:01 PM

1

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:04 PM

5

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:12 PM

22

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:12:12 PM

6

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:12:12 PM

20

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:12 PM

1

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:12:13 PM

5

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:13:11 PM

7

1256.50

AQEU

GENMAB A/S

10-Apr-2025

14:15:01 PM

24

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:15:01 PM

52

1257.00

XCSE

22


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:15:01 PM

52

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:15:01 PM

23

1256.50

AQEU

GENMAB A/S

10-Apr-2025

14:16:52 PM

12

1260.00

TQEX

GENMAB A/S

10-Apr-2025

14:16:52 PM

18

1260.00

AQEU

GENMAB A/S

10-Apr-2025

14:17:59 PM

19

1260.50

XCSE

GENMAB A/S

10-Apr-2025

14:17:59 PM

16

1260.50

XCSE

GENMAB A/S

10-Apr-2025

14:17:59 PM

10

1260.50

XCSE

GENMAB A/S

10-Apr-2025

14:18:54 PM

22

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:18:58 PM

61

1260.00

XCSE

GENMAB A/S

10-Apr-2025

14:18:58 PM

26

1260.00

TQEX

GENMAB A/S

10-Apr-2025

14:18:58 PM

58

1260.00

CEUX

GENMAB A/S

10-Apr-2025

14:18:58 PM

10

1260.00

CEUX

GENMAB A/S

10-Apr-2025

14:18:58 PM

10

1260.00

CEUX

GENMAB A/S

10-Apr-2025

14:20:27 PM

86

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:20:27 PM

55

1259.00

CEUX

GENMAB A/S

10-Apr-2025

14:20:30 PM

8

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:20:30 PM

2

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:21:21 PM

15

1259.00

CEUX

GENMAB A/S

10-Apr-2025

14:21:24 PM

46

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:21:24 PM

13

1259.00

XCSE

GENMAB A/S

10-Apr-2025

14:21:24 PM

28

1258.50

TQEX

GENMAB A/S

10-Apr-2025

14:21:24 PM

74

1259.00

CEUX

GENMAB A/S

10-Apr-2025

14:21:24 PM

29

1258.50

AQEU

GENMAB A/S

10-Apr-2025

14:22:52 PM

78

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

28

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

14

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

38

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

19

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

13

1258.00

XCSE

GENMAB A/S

10-Apr-2025

14:22:52 PM

48

1258.00

CEUX

GENMAB A/S

10-Apr-2025

14:23:08 PM

58

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:23:30 PM

15

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:30 PM

11

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:30 PM

9

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:23:30 PM

32

1257.00

AQEU

GENMAB A/S

10-Apr-2025

14:23:42 PM

5

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:42 PM

11

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:42 PM

25

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:42 PM

9

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:23:54 PM

23

1256.50

XCSE

GENMAB A/S

10-Apr-2025

14:24:32 PM

11

1257.00

XCSE

GENMAB A/S

10-Apr-2025

14:24:33 PM

64

1256.50

XCSE

GENMAB A/S

10-Apr-2025

14:25:43 PM

82

1257.00

XCSE

23


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:25:43 PM

23

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:25:43 PM

58

1257.00

CEUX

GENMAB A/S

10-Apr-2025

14:25:47 PM

26

1256.50

TQEX

GENMAB A/S

10-Apr-2025

14:25:50 PM

64

1256.00

XCSE

GENMAB A/S

10-Apr-2025

14:25:50 PM

22

1256.00

XCSE

GENMAB A/S

10-Apr-2025

14:25:50 PM

29

1256.00

CEUX

GENMAB A/S

10-Apr-2025

14:25:50 PM

50

1256.00

CEUX

GENMAB A/S

10-Apr-2025

14:25:52 PM

24

1255.50

AQEU

GENMAB A/S

10-Apr-2025

14:26:26 PM

23

1255.00

CEUX

GENMAB A/S

10-Apr-2025

14:26:53 PM

22

1255.50

TQEX

GENMAB A/S

10-Apr-2025

14:26:53 PM

5

1255.50

TQEX

GENMAB A/S

10-Apr-2025

14:27:36 PM

4

1255.00

XCSE

GENMAB A/S

10-Apr-2025

14:27:36 PM

83

1255.00

XCSE

GENMAB A/S

10-Apr-2025

14:27:36 PM

21

1255.00

CEUX

GENMAB A/S

10-Apr-2025

14:28:00 PM

20

1253.50

XCSE

GENMAB A/S

10-Apr-2025

14:28:00 PM

1

1253.50

XCSE

GENMAB A/S

10-Apr-2025

14:28:05 PM

21

1253.50

CEUX

GENMAB A/S

10-Apr-2025

14:28:21 PM

39

1253.50

XCSE

GENMAB A/S

10-Apr-2025

14:28:21 PM

27

1253.50

XCSE

GENMAB A/S

10-Apr-2025

14:28:21 PM

38

1253.50

CEUX

GENMAB A/S

10-Apr-2025

14:29:07 PM

20

1253.00

AQEU

GENMAB A/S

10-Apr-2025

14:30:03 PM

20

1254.00

TQEX

GENMAB A/S

10-Apr-2025

14:30:17 PM

89

1254.50

XCSE

GENMAB A/S

10-Apr-2025

14:30:17 PM

2

1254.00

CEUX

GENMAB A/S

10-Apr-2025

14:30:17 PM

47

1254.00

CEUX

GENMAB A/S

10-Apr-2025

14:30:18 PM

82

1253.50

XCSE

GENMAB A/S

10-Apr-2025

14:30:18 PM

59

1253.00

CEUX

GENMAB A/S

10-Apr-2025

14:30:20 PM

85

1252.50

XCSE

GENMAB A/S

10-Apr-2025

14:30:20 PM

12

1252.00

CEUX

GENMAB A/S

10-Apr-2025

14:32:08 PM

41

1253.00

CEUX

GENMAB A/S

10-Apr-2025

14:32:32 PM

86

1252.50

XCSE

GENMAB A/S

10-Apr-2025

14:32:32 PM

18

1252.00

CEUX

GENMAB A/S

10-Apr-2025

14:32:32 PM

32

1252.00

AQEU

GENMAB A/S

10-Apr-2025

14:32:43 PM

25

1251.50

XCSE

GENMAB A/S

10-Apr-2025

14:32:43 PM

62

1251.50

XCSE

GENMAB A/S

10-Apr-2025

14:32:48 PM

26

1251.00

CEUX

GENMAB A/S

10-Apr-2025

14:32:50 PM

84

1250.50

XCSE

GENMAB A/S

10-Apr-2025

14:32:50 PM

2

1250.50

TQEX

GENMAB A/S

10-Apr-2025

14:32:50 PM

26

1250.50

TQEX

GENMAB A/S

10-Apr-2025

14:32:53 PM

29

1249.50

CEUX

GENMAB A/S

10-Apr-2025

14:33:25 PM

32

1250.50

CEUX

GENMAB A/S

10-Apr-2025

14:34:52 PM

6

1250.00

XCSE

GENMAB A/S

10-Apr-2025

14:34:52 PM

12

1250.00

XCSE

24


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:34:52 PM

68

1250.00

XCSE

GENMAB A/S

10-Apr-2025

14:34:52 PM

30

1250.50

CEUX

GENMAB A/S

10-Apr-2025

14:34:53 PM

10

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:34:53 PM

79

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:34:53 PM

27

1249.00

CEUX

GENMAB A/S

10-Apr-2025

14:35:12 PM

71

1250.50

XCSE

GENMAB A/S

10-Apr-2025

14:35:12 PM

24

1250.50

CEUX

GENMAB A/S

10-Apr-2025

14:35:12 PM

11

1251.00

AQEU

GENMAB A/S

10-Apr-2025

14:35:30 PM

18

1250.50

XCSE

GENMAB A/S

10-Apr-2025

14:35:30 PM

51

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:35:30 PM

20

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:35:30 PM

28

1249.50

CEUX

GENMAB A/S

10-Apr-2025

14:36:00 PM

51

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:36:00 PM

49

1248.50

TQEX

GENMAB A/S

10-Apr-2025

14:36:18 PM

47

1247.00

XCSE

GENMAB A/S

10-Apr-2025

14:36:58 PM

43

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:37:49 PM

44

1247.50

XCSE

GENMAB A/S

10-Apr-2025

14:39:03 PM

1

1248.00

AQEU

GENMAB A/S

10-Apr-2025

14:39:25 PM

82

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:39:29 PM

26

1248.50

CEUX

GENMAB A/S

10-Apr-2025

14:39:29 PM

34

1248.50

CEUX

GENMAB A/S

10-Apr-2025

14:40:47 PM

66

1247.50

XCSE

GENMAB A/S

10-Apr-2025

14:40:47 PM

64

1247.50

CEUX

GENMAB A/S

10-Apr-2025

14:40:47 PM

30

1248.00

AQEU

GENMAB A/S

10-Apr-2025

14:40:55 PM

46

1246.50

XCSE

GENMAB A/S

10-Apr-2025

14:40:55 PM

31

1246.50

CEUX

GENMAB A/S

10-Apr-2025

14:43:04 PM

84

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:43:08 PM

48

1248.50

TQEX

GENMAB A/S

10-Apr-2025

14:43:08 PM

61

1248.50

CEUX

GENMAB A/S

10-Apr-2025

14:43:08 PM

29

1248.50

AQEU

GENMAB A/S

10-Apr-2025

14:43:31 PM

86

1248.00

XCSE

GENMAB A/S

10-Apr-2025

14:43:55 PM

25

1247.50

CEUX

GENMAB A/S

10-Apr-2025

14:43:55 PM

40

1247.50

CEUX

GENMAB A/S

10-Apr-2025

14:45:31 PM

13

1247.00

CEUX

GENMAB A/S

10-Apr-2025

14:45:31 PM

26

1247.50

AQEU

GENMAB A/S

10-Apr-2025

14:45:32 PM

24

1247.00

CEUX

GENMAB A/S

10-Apr-2025

14:45:32 PM

27

1247.00

CEUX

GENMAB A/S

10-Apr-2025

14:46:08 PM

21

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:46:12 PM

66

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:48:33 PM

24

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:48:33 PM

29

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:48:33 PM

34

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:36 PM

38

1249.00

XCSE

25


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:49:36 PM

29

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:36 PM

36

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:36 PM

50

1248.50

TQEX

GENMAB A/S

10-Apr-2025

14:49:36 PM

20

1248.50

AQEU

GENMAB A/S

10-Apr-2025

14:49:42 PM

12

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:42 PM

29

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:42 PM

36

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:49:48 PM

14

1249.00

CEUX

GENMAB A/S

10-Apr-2025

14:49:48 PM

68

1249.00

CEUX

GENMAB A/S

10-Apr-2025

14:50:07 PM

3

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:50:07 PM

47

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:50:07 PM

33

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:50:51 PM

5

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:51:16 PM

20

1248.00

CEUX

GENMAB A/S

10-Apr-2025

14:51:16 PM

9

1248.00

CEUX

GENMAB A/S

10-Apr-2025

14:51:16 PM

44

1248.00

CEUX

GENMAB A/S

10-Apr-2025

14:51:29 PM

2

1248.00

XCSE

GENMAB A/S

10-Apr-2025

14:52:42 PM

100

1248.00

XCSE

GENMAB A/S

10-Apr-2025

14:52:59 PM

84

1247.50

XCSE

GENMAB A/S

10-Apr-2025

14:52:59 PM

6

1247.00

AQEU

GENMAB A/S

10-Apr-2025

14:53:32 PM

1

1247.50

XCSE

GENMAB A/S

10-Apr-2025

14:53:32 PM

12

1247.50

XCSE

GENMAB A/S

10-Apr-2025

14:53:45 PM

46

1248.00

TQEX

GENMAB A/S

10-Apr-2025

14:54:44 PM

23

1249.00

AQEU

GENMAB A/S

10-Apr-2025

14:55:29 PM

1

1249.00

AQEU

GENMAB A/S

10-Apr-2025

14:55:29 PM

1

1249.00

AQEU

GENMAB A/S

10-Apr-2025

14:55:34 PM

2

1248.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:16 PM

42

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:16 PM

15

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:16 PM

82

1249.00

CEUX

GENMAB A/S

10-Apr-2025

14:56:26 PM

86

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

20

1250.00

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

14

1250.00

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

30

1250.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

6

1250.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:26 PM

88

1249.50

CEUX

GENMAB A/S

10-Apr-2025

14:56:26 PM

35

1249.50

AQEU

GENMAB A/S

10-Apr-2025

14:56:27 PM

12

1249.50

CEUX

GENMAB A/S

10-Apr-2025

14:56:27 PM

77

1249.50

CEUX

GENMAB A/S

10-Apr-2025

14:56:28 PM

50

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:56:33 PM

32

1249.50

XCSE

GENMAB A/S

10-Apr-2025

14:57:28 PM

75

1248.50

XCSE

26


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

14:57:28 PM

66

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:57:28 PM

42

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:57:28 PM

4

1249.00

XCSE

GENMAB A/S

10-Apr-2025

14:57:28 PM

9

1248.50

XCSE

GENMAB A/S

10-Apr-2025

15:01:18 PM

33

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:01:18 PM

52

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:02:41 PM

84

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

90

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

22

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

10

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

18

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

13

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

43

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

16

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

12

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:02:41 PM

11

1251.50

TQEX

GENMAB A/S

10-Apr-2025

15:02:41 PM

25

1251.50

TQEX

GENMAB A/S

10-Apr-2025

15:02:41 PM

85

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:02:41 PM

31

1251.50

AQEU

GENMAB A/S

10-Apr-2025

15:02:41 PM

28

1250.50

AQEU

GENMAB A/S

10-Apr-2025

15:02:47 PM

9

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:03:00 PM

12

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:03:00 PM

18

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:32 PM

34

1251.50

TQEX

GENMAB A/S

10-Apr-2025

15:04:32 PM

89

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:04:50 PM

16

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

75

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

12

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

7

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

12

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

15

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:04:53 PM

41

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:05:07 PM

16

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:05:13 PM

15

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:05:30 PM

11

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:05:33 PM

50

1252.00

AQEU

GENMAB A/S

10-Apr-2025

15:06:27 PM

12

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:06:27 PM

8

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:06:27 PM

52

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:06:27 PM

22

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:06:28 PM

11

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:06:41 PM

14

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:06:42 PM

14

1253.00

XCSE

27


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:06:42 PM

11

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:06:42 PM

13

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:06:43 PM

16

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:07:26 PM

42

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:07:26 PM

13

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:07:31 PM

22

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:07:39 PM

15

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:07:40 PM

15

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:08:23 PM

26

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:09:02 PM

86

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:09:02 PM

15

1251.50

TQEX

GENMAB A/S

10-Apr-2025

15:09:02 PM

44

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:09:02 PM

38

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:09:13 PM

87

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:09:13 PM

60

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:09:13 PM

30

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:09:13 PM

1

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:10:15 PM

17

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:10:15 PM

15

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:10:15 PM

14

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:11:16 PM

21

1251.50

TQEX

GENMAB A/S

10-Apr-2025

15:11:31 PM

17

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:11:31 PM

1

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:12:27 PM

11

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:12:30 PM

14

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:12:30 PM

24

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:12:30 PM

27

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:12:30 PM

3

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:12:52 PM

8

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

36

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

14

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

30

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

15

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

9

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

41

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:12:52 PM

20

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:12:52 PM

21

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:12:52 PM

48

1251.00

AQEU

GENMAB A/S

10-Apr-2025

15:13:27 PM

36

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:13:27 PM

2

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:13:28 PM

57

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:13:28 PM

3

1250.50

CEUX

GENMAB A/S

10-Apr-2025

15:13:29 PM

6

1250.50

CEUX

28


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:13:29 PM

3

1250.50

CEUX

GENMAB A/S

10-Apr-2025

15:13:29 PM

2

1250.50

CEUX

GENMAB A/S

10-Apr-2025

15:13:31 PM

72

1250.50

CEUX

GENMAB A/S

10-Apr-2025

15:15:11 PM

84

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:15:11 PM

16

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:15:20 PM

87

1251.00

XCSE

GENMAB A/S

10-Apr-2025

15:15:20 PM

5

1250.50

TQEX

GENMAB A/S

10-Apr-2025

15:15:20 PM

22

1250.50

TQEX

GENMAB A/S

10-Apr-2025

15:15:20 PM

36

1251.00

CEUX

GENMAB A/S

10-Apr-2025

15:15:20 PM

48

1250.50

AQEU

GENMAB A/S

10-Apr-2025

15:16:14 PM

29

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:16:14 PM

68

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:16:25 PM

20

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:16:34 PM

85

1253.00

CEUX

GENMAB A/S

10-Apr-2025

15:17:20 PM

89

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:17:20 PM

30

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:17:20 PM

12

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:17:20 PM

27

1253.00

CEUX

GENMAB A/S

10-Apr-2025

15:17:21 PM

23

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:17:28 PM

13

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:17:28 PM

16

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:17:31 PM

13

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:17:41 PM

6

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:17:41 PM

2

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:18:27 PM

18

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:18:42 PM

29

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:18:42 PM

7

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:19:27 PM

14

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:14 PM

14

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:14 PM

20

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:14 PM

27

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:14 PM

49

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:20:14 PM

29

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:20:14 PM

43

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:20:14 PM

2

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:20:28 PM

84

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

15

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

7

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

30

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

42

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

18

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:28 PM

26

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:20:28 PM

84

1252.50

CEUX

29


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:20:29 PM

22

1252.00

AQEU

GENMAB A/S

10-Apr-2025

15:20:33 PM

87

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:20:33 PM

36

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:20:33 PM

86

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:20:33 PM

1

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:21:21 PM

11

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:21 PM

10

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:21 PM

13

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:21 PM

86

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:21:21 PM

3

1253.00

AQEU

GENMAB A/S

10-Apr-2025

15:21:21 PM

23

1253.00

AQEU

GENMAB A/S

10-Apr-2025

15:21:22 PM

26

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:22 PM

25

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:22 PM

51

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:32 PM

23

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:32 PM

36

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:21:32 PM

24

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:22:17 PM

83

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:22:17 PM

47

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:22:17 PM

2

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:22:22 PM

87

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:23:17 PM

2

1253.50

CEUX

GENMAB A/S

10-Apr-2025

15:23:31 PM

86

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:23:31 PM

32

1253.00

CEUX

GENMAB A/S

10-Apr-2025

15:23:31 PM

79

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:23:31 PM

8

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:23:56 PM

88

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:23:58 PM

83

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:23:58 PM

27

1252.00

AQEU

GENMAB A/S

10-Apr-2025

15:24:32 PM

22

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:24:46 PM

28

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:24:46 PM

7

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:24:46 PM

8

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:24:55 PM

44

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

86

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

80

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

32

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

4

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

60

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

36

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:26:23 PM

26

1254.00

TQEX

GENMAB A/S

10-Apr-2025

15:26:23 PM

85

1254.50

CEUX

GENMAB A/S

10-Apr-2025

15:26:23 PM

49

1254.50

AQEU

30


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:26:28 PM

82

1254.00

XCSE

GENMAB A/S

10-Apr-2025

15:26:28 PM

26

1254.00

TQEX

GENMAB A/S

10-Apr-2025

15:26:28 PM

5

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:26:28 PM

81

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:27:27 PM

89

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:27 PM

45

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:27 PM

27

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:27 PM

40

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:27 PM

89

1253.00

CEUX

GENMAB A/S

10-Apr-2025

15:27:30 PM

34

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:30 PM

52

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:27:30 PM

89

1252.00

CEUX

GENMAB A/S

10-Apr-2025

15:28:04 PM

87

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:28:04 PM

26

1253.50

TQEX

GENMAB A/S

10-Apr-2025

15:28:04 PM

26

1253.50

AQEU

GENMAB A/S

10-Apr-2025

15:28:28 PM

83

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:28:28 PM

11

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:28:28 PM

74

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:30:00 PM

82

1253.00

XCSE

GENMAB A/S

10-Apr-2025

15:30:01 PM

40

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:02 PM

45

1255.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:04 PM

84

1255.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:04 PM

16

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:04 PM

11

1255.00

TQEX

GENMAB A/S

10-Apr-2025

15:30:04 PM

15

1255.00

TQEX

GENMAB A/S

10-Apr-2025

15:30:04 PM

88

1255.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:05 PM

72

1254.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:05 PM

49

1254.50

AQEU

GENMAB A/S

10-Apr-2025

15:30:06 PM

14

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:06 PM

30

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:06 PM

18

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:06 PM

19

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:06 PM

6

1253.50

XCSE

GENMAB A/S

10-Apr-2025

15:30:06 PM

20

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:06 PM

17

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:06 PM

7

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:06 PM

4

1254.00

CEUX

GENMAB A/S

10-Apr-2025

15:30:21 PM

87

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:30:36 PM

25

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:30:36 PM

57

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:30:41 PM

3

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:30:41 PM

84

1252.00

XCSE

GENMAB A/S

10-Apr-2025

15:30:41 PM

84

1251.50

CEUX

31


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:31:02 PM

11

1253.00

TQEX

GENMAB A/S

10-Apr-2025

15:31:02 PM

27

1253.00

TQEX

GENMAB A/S

10-Apr-2025

15:31:07 PM

84

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:07 PM

42

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:07 PM

28

1252.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:07 PM

59

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:31:07 PM

26

1252.50

CEUX

GENMAB A/S

10-Apr-2025

15:31:11 PM

26

1252.50

TQEX

GENMAB A/S

10-Apr-2025

15:31:17 PM

83

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:17 PM

6

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:17 PM

27

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:17 PM

3

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:17 PM

1

1251.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:17 PM

31

1251.50

CEUX

GENMAB A/S

10-Apr-2025

15:31:17 PM

26

1252.00

AQEU

GENMAB A/S

10-Apr-2025

15:31:30 PM

79

1250.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:30 PM

4

1250.50

XCSE

GENMAB A/S

10-Apr-2025

15:31:31 PM

83

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:31:38 PM

45

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:31:38 PM

39

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:31:38 PM

82

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:32:11 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:11 PM

17

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:11 PM

24

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:11 PM

29

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:11 PM

20

1249.50

AQEU

GENMAB A/S

10-Apr-2025

15:32:11 PM

8

1249.50

AQEU

GENMAB A/S

10-Apr-2025

15:32:12 PM

12

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:12 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:12 PM

16

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:12 PM

14

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

4

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

1

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

85

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

26

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

26

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

3

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

28

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:22 PM

2

1248.50

TQEX

GENMAB A/S

10-Apr-2025

15:32:22 PM

5

1248.50

TQEX

GENMAB A/S

10-Apr-2025

15:32:22 PM

83

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:32:22 PM

34

1249.00

CEUX

32


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:32:22 PM

7

1249.00

CEUX

GENMAB A/S

10-Apr-2025

15:32:22 PM

7

1249.00

CEUX

GENMAB A/S

10-Apr-2025

15:32:22 PM

12

1249.00

CEUX

GENMAB A/S

10-Apr-2025

15:32:22 PM

28

1249.50

AQEU

GENMAB A/S

10-Apr-2025

15:32:23 PM

25

1248.50

TQEX

GENMAB A/S

10-Apr-2025

15:32:26 PM

84

1248.00

XCSE

GENMAB A/S

10-Apr-2025

15:32:42 PM

16

1247.50

TQEX

GENMAB A/S

10-Apr-2025

15:32:42 PM

16

1247.50

TQEX

GENMAB A/S

10-Apr-2025

15:32:42 PM

86

1247.50

CEUX

GENMAB A/S

10-Apr-2025

15:33:02 PM

31

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:02 PM

51

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:02 PM

10

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:02 PM

28

1249.50

TQEX

GENMAB A/S

10-Apr-2025

15:33:06 PM

23

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:33:41 PM

7

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:41 PM

42

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:41 PM

16

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:42 PM

16

1249.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:42 PM

1

1248.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:42 PM

81

1248.50

XCSE

GENMAB A/S

10-Apr-2025

15:33:42 PM

30

1249.00

TQEX

GENMAB A/S

10-Apr-2025

15:33:42 PM

7

1248.50

CEUX

GENMAB A/S

10-Apr-2025

15:33:42 PM

5

1248.50

CEUX

GENMAB A/S

10-Apr-2025

15:33:42 PM

66

1248.50

CEUX

GENMAB A/S

10-Apr-2025

15:34:15 PM

87

1248.50

XCSE

GENMAB A/S

10-Apr-2025

15:34:15 PM

27

1248.50

AQEU

GENMAB A/S

10-Apr-2025

15:34:23 PM

28

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:23 PM

59

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:23 PM

32

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:34:27 PM

30

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:34:28 PM

85

1250.00

CEUX

GENMAB A/S

10-Apr-2025

15:34:29 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:29 PM

31

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:29 PM

23

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

7

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

31

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

13

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

16

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

15

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

11

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

14

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

13

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

16

1250.00

XCSE

33


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:34:30 PM

42

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:30 PM

16

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:31 PM

3

1250.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:39 PM

3

1249.50

TQEX

GENMAB A/S

10-Apr-2025

15:34:39 PM

4

1249.50

TQEX

GENMAB A/S

10-Apr-2025

15:34:39 PM

22

1249.50

TQEX

GENMAB A/S

10-Apr-2025

15:34:40 PM

81

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:40 PM

6

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:46 PM

45

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:46 PM

42

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:46 PM

16

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:46 PM

9

1249.00

XCSE

GENMAB A/S

10-Apr-2025

15:34:46 PM

89

1248.50

CEUX

GENMAB A/S

10-Apr-2025

15:34:54 PM

26

1248.00

TQEX

GENMAB A/S

10-Apr-2025

15:35:11 PM

88

1247.50

XCSE

GENMAB A/S

10-Apr-2025

15:35:11 PM

27

1247.50

XCSE

GENMAB A/S

10-Apr-2025

15:35:11 PM

42

1247.50

XCSE

GENMAB A/S

10-Apr-2025

15:35:11 PM

29

1248.00

XCSE

GENMAB A/S

10-Apr-2025

15:35:11 PM

30

1247.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:11 PM

40

1247.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:11 PM

26

1247.50

AQEU

GENMAB A/S

10-Apr-2025

15:35:14 PM

83

1246.50

XCSE

GENMAB A/S

10-Apr-2025

15:35:14 PM

6

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:14 PM

27

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:14 PM

6

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:14 PM

10

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:14 PM

3

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:14 PM

35

1246.50

CEUX

GENMAB A/S

10-Apr-2025

15:35:20 PM

82

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:01 PM

30

1247.00

AQEU

GENMAB A/S

10-Apr-2025

15:36:04 PM

84

1246.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:04 PM

26

1246.50

TQEX

GENMAB A/S

10-Apr-2025

15:36:19 PM

84

1247.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:19 PM

8

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:19 PM

2

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:19 PM

79

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:19 PM

25

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:19 PM

25

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:19 PM

33

1247.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

86

1246.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

5

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

34


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:36:26 PM

5

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

13

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

12

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

3

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

3

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

7

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

4

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

3

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

4

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

5

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

3

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

2

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:26 PM

3

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:29 PM

1

1246.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:37 PM

10

1245.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:39 PM

10

1245.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:39 PM

9

1245.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:41 PM

10

1245.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:41 PM

50

1245.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:45 PM

86

1244.50

XCSE

GENMAB A/S

10-Apr-2025

15:36:45 PM

32

1244.00

TQEX

GENMAB A/S

10-Apr-2025

15:36:45 PM

8

1244.00

TQEX

GENMAB A/S

10-Apr-2025

15:36:45 PM

3

1244.00

TQEX

GENMAB A/S

10-Apr-2025

15:36:45 PM

8

1244.00

TQEX

GENMAB A/S

10-Apr-2025

15:36:45 PM

85

1245.00

CEUX

GENMAB A/S

10-Apr-2025

15:36:46 PM

3

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:36:46 PM

2

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:36:46 PM

2

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:04 PM

86

1245.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:04 PM

17

1244.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:04 PM

10

1244.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:04 PM

2

1244.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:05 PM

52

1244.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:05 PM

37

1244.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:06 PM

10

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:06 PM

15

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:06 PM

9

1243.50

CEUX

GENMAB A/S

10-Apr-2025

15:37:11 PM

83

1243.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:11 PM

3

1242.00

CEUX

35


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:37:11 PM

3

1242.00

CEUX

GENMAB A/S

10-Apr-2025

15:37:11 PM

8

1242.00

CEUX

GENMAB A/S

10-Apr-2025

15:37:12 PM

6

1242.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:12 PM

2

1242.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:12 PM

48

1242.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:12 PM

2

1242.00

CEUX

GENMAB A/S

10-Apr-2025

15:37:12 PM

10

1242.00

CEUX

GENMAB A/S

10-Apr-2025

15:37:29 PM

33

1242.00

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

10

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

3

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

4

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

5

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

4

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

2

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

5

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

3

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:37:53 PM

31

1241.00

CEUX

GENMAB A/S

10-Apr-2025

15:37:54 PM

9

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:38:06 PM

3

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:38:06 PM

16

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:38:06 PM

61

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:38:06 PM

6

1241.00

CEUX

GENMAB A/S

10-Apr-2025

15:38:06 PM

37

1241.00

CEUX

GENMAB A/S

10-Apr-2025

15:38:06 PM

32

1241.00

AQEU

GENMAB A/S

10-Apr-2025

15:38:07 PM

43

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:38:07 PM

42

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:38:07 PM

10

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:38:07 PM

40

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:04 PM

1

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:39:04 PM

37

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:39:04 PM

47

1240.00

TQEX

GENMAB A/S

10-Apr-2025

15:39:15 PM

36

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:22 PM

87

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:39:40 PM

85

1241.50

XCSE

GENMAB A/S

10-Apr-2025

15:39:40 PM

36

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:39:40 PM

51

1240.50

XCSE

GENMAB A/S

10-Apr-2025

15:39:40 PM

54

1240.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:40 PM

4

1240.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:40 PM

5

1240.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:40 PM

26

1241.50

AQEU

GENMAB A/S

10-Apr-2025

15:39:57 PM

2

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:39:57 PM

52

1240.00

XCSE

GENMAB A/S

10-Apr-2025

15:39:57 PM

46

1240.50

CEUX

36


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:39:57 PM

6

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

7

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

6

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

13

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

2

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

4

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

7

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:39:57 PM

5

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:02 PM

9

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:02 PM

10

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:02 PM

8

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:15 PM

26

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:40:15 PM

4

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:40:15 PM

13

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:40:15 PM

56

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:40:15 PM

6

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:15 PM

20

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:40:15 PM

40

1239.50

AQEU

GENMAB A/S

10-Apr-2025

15:40:38 PM

2

1238.00

TQEX

GENMAB A/S

10-Apr-2025

15:40:38 PM

2

1238.00

TQEX

GENMAB A/S

10-Apr-2025

15:40:38 PM

2

1238.00

TQEX

GENMAB A/S

10-Apr-2025

15:40:38 PM

2

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:40:38 PM

3

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:40:38 PM

3

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:40:38 PM

8

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:15 PM

16

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

55

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:41:26 PM

2

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

15

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

2

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

3

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

2

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:26 PM

6

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:41:30 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:41:30 PM

49

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:05 PM

60

1239.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

25

1239.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

28

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

5

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

15

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

5

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

10

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

8

1238.50

XCSE

37


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:42:05 PM

14

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:05 PM

36

1239.00

TQEX

GENMAB A/S

10-Apr-2025

15:42:05 PM

59

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:05 PM

6

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:05 PM

7

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:05 PM

35

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:05 PM

22

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:07 PM

24

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:07 PM

5

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:42:07 PM

21

1238.50

AQEU

GENMAB A/S

10-Apr-2025

15:42:07 PM

10

1238.50

AQEU

GENMAB A/S

10-Apr-2025

15:42:45 PM

89

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:45 PM

3

1237.50

TQEX

GENMAB A/S

10-Apr-2025

15:42:45 PM

2

1237.50

AQEU

GENMAB A/S

10-Apr-2025

15:42:45 PM

32

1237.50

AQEU

GENMAB A/S

10-Apr-2025

15:42:59 PM

46

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:42:59 PM

42

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:59 PM

23

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:42:59 PM

33

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:42:59 PM

5

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:42:59 PM

27

1237.50

TQEX

GENMAB A/S

10-Apr-2025

15:42:59 PM

1

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:42:59 PM

22

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:42:59 PM

9

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:43:02 PM

83

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:03 PM

4

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:03 PM

9

1238.00

TQEX

GENMAB A/S

10-Apr-2025

15:44:03 PM

43

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:03 PM

15

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:09 PM

42

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:44:09 PM

26

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:44:09 PM

4

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:09 PM

3

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:10 PM

87

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:10 PM

15

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:10 PM

1

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:10 PM

50

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:10 PM

19

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:10 PM

70

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:10 PM

1

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:10 PM

14

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:10 PM

3

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:10 PM

42

1237.00

CEUX

38


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:44:11 PM

27

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:44:23 PM

82

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:23 PM

30

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:35 PM

88

1239.50

XCSE

GENMAB A/S

10-Apr-2025

15:44:35 PM

5

1239.00

TQEX

GENMAB A/S

10-Apr-2025

15:44:35 PM

8

1239.00

TQEX

GENMAB A/S

10-Apr-2025

15:44:35 PM

10

1239.00

TQEX

GENMAB A/S

10-Apr-2025

15:44:35 PM

3

1239.00

TQEX

GENMAB A/S

10-Apr-2025

15:44:35 PM

40

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:44:36 PM

10

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:36 PM

2

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:36 PM

7

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:36 PM

2

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:36 PM

7

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:36 PM

27

1239.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:40 PM

60

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:42 PM

1

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:42 PM

10

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:44:42 PM

10

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:42 PM

15

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:42 PM

10

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:42 PM

1

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:44:59 PM

7

1239.00

AQEU

GENMAB A/S

10-Apr-2025

15:45:09 PM

63

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

23

1239.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

14

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

14

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

11

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

30

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:09 PM

28

1239.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

3

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

7

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

6

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

2

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

5

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

5

1238.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

3

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

5

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

11

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:45:09 PM

3

1237.50

CEUX

39


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:45:09 PM

40

1239.00

AQEU

GENMAB A/S

10-Apr-2025

15:45:31 PM

3

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:31 PM

12

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:31 PM

13

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:31 PM

61

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:31 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:31 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:32 PM

3

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:32 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:39 PM

4

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:39 PM

3

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:39 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:39 PM

4

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:40 PM

62

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:40 PM

20

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:40 PM

12

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:45:40 PM

26

1236.00

CEUX

GENMAB A/S

10-Apr-2025

15:45:42 PM

5

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:45:42 PM

5

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:45:44 PM

5

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:45:44 PM

8

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:45:44 PM

6

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:45:44 PM

6

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:45:45 PM

50

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:45 PM

13

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:52 PM

50

1238.50

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

4

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

6

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

6

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:45:53 PM

2

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:04 PM

8

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:04 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:04 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:07 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

13

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

12

1238.00

XCSE

40


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:46:07 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

3

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

8

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:07 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:07 PM

2

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:10 PM

2

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

6

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

2

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

7

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

3

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

10

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:10 PM

17

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:27 PM

2

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:46:34 PM

5

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:46:34 PM

7

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:46:34 PM

9

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:46:34 PM

2

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:46:34 PM

9

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:46:34 PM

40

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:34 PM

5

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:57 PM

7

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:57 PM

25

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:46:57 PM

33

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:47:10 PM

5

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

10

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

7

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

2

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

8

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

10

1238.00

CEUX

GENMAB A/S

10-Apr-2025

15:47:10 PM

2

1237.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:12 PM

89

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:12 PM

26

1237.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

84

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

9

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

4

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

4

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

5

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

7

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

5

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:27 PM

1

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:47:27 PM

3

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

11

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

2

1236.50

AQEU

41


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:47:27 PM

7

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

3

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

2

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:27 PM

2

1236.50

AQEU

GENMAB A/S

10-Apr-2025

15:47:28 PM

10

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:35 PM

30

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:47:36 PM

14

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:37 PM

8

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:47:47 PM

12

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:47:47 PM

12

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:47:48 PM

4

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:47:48 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:47:50 PM

20

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

17

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:02 PM

9

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:02 PM

50

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:02 PM

7

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:02 PM

6

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:02 PM

4

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

5

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

4

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

7

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

18

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:02 PM

1

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:06 PM

84

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:06 PM

5

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:06 PM

37

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:19 PM

4

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:32 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:32 PM

20

1237.00

AQEU

42


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:48:32 PM

5

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:32 PM

7

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:32 PM

2

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:32 PM

7

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:32 PM

3

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:48:37 PM

13

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:37 PM

8

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:37 PM

9

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:37 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:37 PM

2

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:37 PM

10

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:48 PM

62

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:48 PM

46

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:48:59 PM

84

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:48:59 PM

7

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:59 PM

5

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:59 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:48:59 PM

21

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:00 PM

10

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:49:27 PM

75

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:49:27 PM

30

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

7

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

2

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

3

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

12

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

4

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

7

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:27 PM

2

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:41 PM

87

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:49:41 PM

3

1236.00

TQEX

GENMAB A/S

10-Apr-2025

15:49:41 PM

2

1236.00

TQEX

GENMAB A/S

10-Apr-2025

15:49:41 PM

4

1236.00

TQEX

GENMAB A/S

10-Apr-2025

15:49:41 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:41 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:41 PM

35

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:43 PM

12

1236.00

TQEX

GENMAB A/S

10-Apr-2025

15:49:52 PM

2

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:49:52 PM

3

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:52 PM

25

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:49:53 PM

7

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:49:59 PM

76

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:00 PM

10

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:00 PM

2

1235.50

CEUX

43


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:50:00 PM

28

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

79

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:04 PM

4

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

2

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

3

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

10

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

3

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

3

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:04 PM

3

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:14 PM

3

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:14 PM

2

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:50:15 PM

26

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:25 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:50:25 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:50:36 PM

2

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:50:36 PM

3

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:50:36 PM

4

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:50:36 PM

15

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:50:59 PM

7

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:59 PM

10

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:59 PM

7

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:50:59 PM

2

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:51:14 PM

56

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:51:14 PM

2

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:51:14 PM

2

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:51:14 PM

2

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:51:15 PM

88

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:51:15 PM

22

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:51:15 PM

9

1235.50

TQEX

GENMAB A/S

10-Apr-2025

15:51:15 PM

23

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:15 PM

10

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:15 PM

9

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:15 PM

3

1235.50

AQEU

GENMAB A/S

10-Apr-2025

15:51:15 PM

10

1235.50

AQEU

GENMAB A/S

10-Apr-2025

15:51:15 PM

5

1235.50

AQEU

GENMAB A/S

10-Apr-2025

15:51:18 PM

8

1235.50

AQEU

GENMAB A/S

10-Apr-2025

15:51:30 PM

5

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:30 PM

2

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:30 PM

30

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:51:30 PM

11

1234.50

AQEU

GENMAB A/S

10-Apr-2025

15:51:34 PM

3

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

2

1234.00

XCSE

44


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:51:37 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

5

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

5

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

4

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

3

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:37 PM

11

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:51:53 PM

9

1235.00

CEUX

GENMAB A/S

10-Apr-2025

15:51:53 PM

2

1235.00

CEUX

GENMAB A/S

10-Apr-2025

15:51:53 PM

2

1235.00

CEUX

GENMAB A/S

10-Apr-2025

15:52:25 PM

32

1237.50

TQEX

GENMAB A/S

10-Apr-2025

15:52:26 PM

1

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

6

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

81

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

16

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

42

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

30

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

13

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

11

1238.00

XCSE

GENMAB A/S

10-Apr-2025

15:52:26 PM

25

1237.50

AQEU

GENMAB A/S

10-Apr-2025

15:52:35 PM

88

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

37

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

5

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

3

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

4

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

4

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

4

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

3

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

3

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:04 PM

88

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:53:18 PM

82

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:18 PM

10

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:53:18 PM

5

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:53:31 PM

82

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:53:31 PM

38

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:53:33 PM

15

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:33 PM

12

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:34 PM

72

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:53:34 PM

12

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:53:35 PM

24

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:35 PM

36

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:53:35 PM

8

1236.00

CEUX

GENMAB A/S

10-Apr-2025

15:53:53 PM

86

1237.50

XCSE

45


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:53:53 PM

2

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:54:07 PM

85

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:54:14 PM

17

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:14 PM

59

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:25 PM

5

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:54:25 PM

15

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:54:27 PM

83

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:54:27 PM

2

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:54:27 PM

6

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:54:27 PM

2

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:54:27 PM

10

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:54:27 PM

66

1237.50

CEUX

GENMAB A/S

10-Apr-2025

15:54:33 PM

56

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:47 PM

4

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:47 PM

16

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:47 PM

6

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:54:48 PM

85

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:14 PM

42

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:14 PM

14

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:14 PM

25

1236.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:36 PM

5

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:55:37 PM

42

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:37 PM

16

1237.50

XCSE

GENMAB A/S

10-Apr-2025

15:55:37 PM

5

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

18

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

3

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

7

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

4

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

2

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

5

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

3

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

4

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:37 PM

28

1237.00

CEUX

GENMAB A/S

10-Apr-2025

15:55:41 PM

23

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:55:41 PM

62

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:55:41 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

6

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

6

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

6

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

2

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:41 PM

5

1236.50

TQEX

GENMAB A/S

10-Apr-2025

15:55:42 PM

10

1236.00

XCSE

46


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:55:42 PM

76

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:55:42 PM

81

1236.00

CEUX

GENMAB A/S

10-Apr-2025

15:56:30 PM

87

1237.00

XCSE

GENMAB A/S

10-Apr-2025

15:56:30 PM

25

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:56:30 PM

9

1237.00

TQEX

GENMAB A/S

10-Apr-2025

15:56:30 PM

12

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:56:30 PM

53

1236.50

CEUX

GENMAB A/S

10-Apr-2025

15:56:30 PM

16

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:56:30 PM

22

1237.00

AQEU

GENMAB A/S

10-Apr-2025

15:56:35 PM

2

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:56:35 PM

72

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:56:35 PM

4

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:56:35 PM

4

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:56:35 PM

9

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:57:01 PM

16

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:01 PM

10

1236.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

4

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

14

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

13

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

4

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

8

1235.50

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

82

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:07 PM

10

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:57:07 PM

32

1235.50

CEUX

GENMAB A/S

10-Apr-2025

15:57:27 PM

84

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

7

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

46

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

12

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:57:40 PM

13

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:58:10 PM

28

1234.50

TQEX

GENMAB A/S

10-Apr-2025

15:58:10 PM

5

1234.50

TQEX

GENMAB A/S

10-Apr-2025

15:58:10 PM

26

1234.50

CEUX

GENMAB A/S

10-Apr-2025

15:58:10 PM

28

1234.50

AQEU

GENMAB A/S

10-Apr-2025

15:58:20 PM

10

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:58:20 PM

79

1234.00

XCSE

GENMAB A/S

10-Apr-2025

15:58:20 PM

31

1233.50

TQEX

GENMAB A/S

10-Apr-2025

15:58:20 PM

54

1233.50

CEUX

GENMAB A/S

10-Apr-2025

15:58:33 PM

10

1233.50

XCSE

GENMAB A/S

10-Apr-2025

15:58:40 PM

79

1233.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:00 PM

11

1234.00

XCSE

47


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:59:01 PM

1

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

42

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

30

1235.00

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

16

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

5

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

8

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

7

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

8

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

7

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

8

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

25

1234.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:01 PM

2

1234.00

AQEU

GENMAB A/S

10-Apr-2025

15:59:01 PM

5

1234.00

AQEU

GENMAB A/S

10-Apr-2025

15:59:01 PM

30

1234.00

AQEU

GENMAB A/S

10-Apr-2025

15:59:22 PM

88

1233.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:22 PM

2

1233.50

CEUX

GENMAB A/S

10-Apr-2025

15:59:22 PM

86

1233.50

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

17

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

4

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

4

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

3

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

4

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

8

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

42

1232.50

XCSE

GENMAB A/S

10-Apr-2025

15:59:47 PM

2

1233.00

TQEX

GENMAB A/S

10-Apr-2025

15:59:47 PM

3

1233.00

TQEX

GENMAB A/S

10-Apr-2025

15:59:47 PM

7

1233.00

TQEX

GENMAB A/S

10-Apr-2025

15:59:47 PM

9

1233.00

TQEX

GENMAB A/S

10-Apr-2025

15:59:47 PM

5

1233.00

TQEX

GENMAB A/S

10-Apr-2025

15:59:47 PM

4

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

20

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

5

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

3

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

14

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

6

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

19

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

7

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

5

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

15:59:47 PM

2

1233.00

AQEU

GENMAB A/S

10-Apr-2025

15:59:47 PM

10

1233.00

AQEU

GENMAB A/S

10-Apr-2025

15:59:47 PM

3

1233.00

AQEU

48


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

15:59:47 PM

18

1233.00

AQEU

GENMAB A/S

10-Apr-2025

16:00:04 PM

84

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:00:09 PM

89

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:14 PM

82

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:14 PM

9

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:14 PM

7

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:14 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

89

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:23 PM

10

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

4

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

7

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

2

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:23 PM

36

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

10

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

2

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

10

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

2

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

2

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:28 PM

2

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

86

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:40 PM

6

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

5

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

10

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

10

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

5

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

3

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

4

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

2

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

4

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

3

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

3

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:00:40 PM

2

1232.50

AQEU

GENMAB A/S

10-Apr-2025

16:00:40 PM

19

1232.50

AQEU

GENMAB A/S

10-Apr-2025

16:00:40 PM

3

1232.50

AQEU

49


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:00:40 PM

2

1232.50

AQEU

GENMAB A/S

10-Apr-2025

16:00:45 PM

26

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:00:47 PM

6

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

2

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

4

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

6

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

4

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

2

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:00:47 PM

61

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:01:17 PM

16

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:17 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:18 PM

57

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:18 PM

15

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:18 PM

14

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:18 PM

26

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:22 PM

17

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:22 PM

2

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:22 PM

25

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:22 PM

7

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:22 PM

38

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:22 PM

5

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:22 PM

3

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:22 PM

22

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

2

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:29 PM

7

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:29 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:29 PM

5

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:29 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:01:29 PM

11

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:01:29 PM

5

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:01:29 PM

8

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:01:29 PM

5

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:01:29 PM

7

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:01:29 PM

2

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

2

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

3

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

2

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

2

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

9

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:29 PM

10

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:01:45 PM

64

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:02:01 PM

46

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:04 PM

15

1229.50

XCSE

50


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:02:04 PM

15

1229.50

AQEU

GENMAB A/S

10-Apr-2025

16:02:04 PM

15

1229.50

AQEU

GENMAB A/S

10-Apr-2025

16:02:07 PM

72

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:02:30 PM

7

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:30 PM

4

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:30 PM

2

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:30 PM

12

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:30 PM

1

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:02:31 PM

83

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:02:52 PM

27

1229.50

TQEX

GENMAB A/S

10-Apr-2025

16:03:01 PM

10

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:02 PM

73

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:02 PM

25

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:02 PM

7

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:02 PM

8

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:02 PM

6

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:02 PM

10

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:02 PM

43

1230.00

AQEU

GENMAB A/S

10-Apr-2025

16:03:08 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:08 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:08 PM

25

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:40 PM

50

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:40 PM

20

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:40 PM

6

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:03:40 PM

21

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:03:40 PM

4

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:03:51 PM

72

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:05 PM

2

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

10

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

10

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

3

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

5

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

37

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

4

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

2

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

7

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

36

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

5

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:05 PM

2

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:04:09 PM

30

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:09 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:09 PM

16

1231.00

XCSE

51


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:04:09 PM

30

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:04:22 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:32 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:32 PM

30

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:32 PM

29

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:39 PM

89

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:39 PM

88

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:04:39 PM

27

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:04:41 PM

49

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:04:41 PM

20

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:04:41 PM

15

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:04:41 PM

26

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:04:53 PM

10

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:04:53 PM

10

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:04:53 PM

9

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:05:21 PM

20

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:05:39 PM

16

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:05:39 PM

41

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:05:39 PM

25

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:04 PM

50

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:04 PM

35

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:23 PM

86

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:23 PM

24

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:06:23 PM

15

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:06:23 PM

29

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:06:23 PM

17

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:06:34 PM

3

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:06:34 PM

3

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:06:38 PM

1

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:38 PM

85

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:38 PM

14

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:38 PM

15

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:38 PM

8

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:06:38 PM

25

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:06:38 PM

2

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:06:38 PM

5

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:06:53 PM

51

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:06:55 PM

4

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:06:55 PM

8

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:06:55 PM

73

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:08 PM

42

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:14 PM

83

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:07:14 PM

3

1231.00

CEUX

52


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:07:14 PM

62

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:14 PM

2

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:07:14 PM

4

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:07:14 PM

27

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:07:14 PM

7

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:07:14 PM

3

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:07:15 PM

84

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:31 PM

83

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:31 PM

5

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:07:31 PM

3

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:07:31 PM

7

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:07:31 PM

6

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:07:31 PM

2

1229.00

TQEX

GENMAB A/S

10-Apr-2025

16:07:31 PM

85

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

5

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

15

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

6

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

2

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

2

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

3

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

2

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

3

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

2

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

5

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

6

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

8

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:31 PM

3

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:44 PM

5

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:44 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:44 PM

16

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:44 PM

4

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:45 PM

10

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:49 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:07:52 PM

7

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:52 PM

10

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:52 PM

5

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:07:52 PM

8

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:08:10 PM

2

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:08:10 PM

4

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:08:10 PM

11

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:08:10 PM

13

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:08:23 PM

86

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:23 PM

26

1230.50

TQEX

53


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:08:28 PM

4

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

5

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

7

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

15

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

3

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

2

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

2

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:08:28 PM

15

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:08:28 PM

15

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:16 PM

88

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:09:16 PM

11

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:16 PM

15

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:16 PM

2

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:16 PM

20

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:35 PM

52

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:09:35 PM

14

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:09:35 PM

5

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:09:36 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:09:36 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:09:36 PM

3

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:36 PM

22

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:36 PM

21

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:09:37 PM

5

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:09:37 PM

5

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:09:37 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

82

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

5

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

13

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

13

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

16

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

16

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:06 PM

7

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:10:25 PM

87

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:10:25 PM

3

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:10:25 PM

2

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:10:25 PM

13

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:10:25 PM

5

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:10:25 PM

4

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:10:25 PM

27

1230.50

AQEU

54


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:10:49 PM

24

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:10:49 PM

15

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:10:49 PM

47

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:10:49 PM

25

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:10:52 PM

43

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:11:32 PM

86

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

17

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

70

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

5

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

20

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

9

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

15

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

16

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

5

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:11:34 PM

1

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:11:34 PM

3

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:11:34 PM

7

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:11:34 PM

4

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:11:34 PM

5

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:11:34 PM

83

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:11:34 PM

35

1231.50

AQEU

GENMAB A/S

10-Apr-2025

16:11:38 PM

86

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:11:38 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:11:38 PM

70

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:12:11 PM

88

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:12:11 PM

16

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:12:11 PM

20

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:12:11 PM

32

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:14 PM

80

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:27 PM

2

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:27 PM

1

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

6

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

6

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

19

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:13:52 PM

5

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:02 PM

43

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

30

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

1

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

42

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

16

1232.50

XCSE

55


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:14:57 PM

16

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

7

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

84

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:14:57 PM

86

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

5

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

8

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

4

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

8

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:14:57 PM

18

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:15:06 PM

42

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:06 PM

15

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:06 PM

13

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:06 PM

15

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:08 PM

13

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:08 PM

13

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:08 PM

42

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:08 PM

16

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:13 PM

14

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:13 PM

42

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:14 PM

15

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:14 PM

42

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:15:33 PM

76

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:15:35 PM

30

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:35 PM

25

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:37 PM

30

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:37 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:37 PM

42

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:37 PM

13

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:38 PM

15

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:38 PM

15

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:38 PM

42

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:15:40 PM

89

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:16:10 PM

10

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:16:12 PM

24

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:16:12 PM

27

1233.50

AQEU

GENMAB A/S

10-Apr-2025

16:16:32 PM

3

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:16:32 PM

11

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:16:41 PM

87

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:16:41 PM

35

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:16:41 PM

84

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:16:41 PM

26

1233.50

AQEU

GENMAB A/S

10-Apr-2025

16:16:48 PM

33

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:16:48 PM

24

1234.00

XCSE

56


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:16:48 PM

83

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:16:48 PM

1

1233.50

AQEU

GENMAB A/S

10-Apr-2025

16:16:48 PM

16

1233.50

AQEU

GENMAB A/S

10-Apr-2025

16:16:52 PM

38

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:17:06 PM

87

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:16 PM

89

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:27 PM

67

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:33 PM

25

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:33 PM

29

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:33 PM

32

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:17:41 PM

18

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:41 PM

21

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:17:47 PM

32

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:18:01 PM

70

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:18:14 PM

82

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:18:14 PM

83

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:18:21 PM

13

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:18:21 PM

75

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:19:00 PM

84

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:19:27 PM

14

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:19:27 PM

8

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:19:37 PM

18

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:19:37 PM

1

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:19:37 PM

2

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:19:44 PM

1

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:19:44 PM

88

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:19:45 PM

1

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:19:49 PM

71

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:19:49 PM

44

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:20:00 PM

25

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:20:00 PM

4

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:20:00 PM

25

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:20:00 PM

25

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:20:00 PM

13

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:20:00 PM

74

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:06 PM

6

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:06 PM

80

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:26 PM

3

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:26 PM

50

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:32 PM

39

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:39 PM

15

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:39 PM

25

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:45 PM

5

1231.50

XCSE

57


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:20:45 PM

5

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:52 PM

2

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:52 PM

10

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:52 PM

15

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:20:52 PM

8

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:20:52 PM

29

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:21:13 PM

58

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:13 PM

16

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:13 PM

10

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:16 PM

13

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:21:16 PM

13

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:21:18 PM

1

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:18 PM

12

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:18 PM

49

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:37 PM

40

1230.00

TQEX

GENMAB A/S

10-Apr-2025

16:21:44 PM

5

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:44 PM

32

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:21:44 PM

57

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:21:46 PM

25

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

5

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

2

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

8

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

23

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

42

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

9

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:21:46 PM

2

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:46 PM

31

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:46 PM

7

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:46 PM

3

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:49 PM

25

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:50 PM

4

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:21:55 PM

2

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:10 PM

5

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:22:19 PM

31

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

58

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

3

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

5

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

3

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

23

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

13

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:22:29 PM

22

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:22:29 PM

2

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:22:33 PM

5

1230.50

CEUX

58


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:22:33 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:22:33 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:22:33 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:22:33 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:22:33 PM

2

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:14 PM

35

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

4

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

13

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

11

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

14

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:23:24 PM

3

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

8

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

8

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

28

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

22

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:23:24 PM

16

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:23:25 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:24:12 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:24:12 PM

13

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:24:12 PM

15

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:24:12 PM

14

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:24:12 PM

32

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:24:18 PM

60

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:24:26 PM

4

1231.00

TQEX

GENMAB A/S

10-Apr-2025

16:24:27 PM

24

1231.00

TQEX

GENMAB A/S

10-Apr-2025

16:24:27 PM

32

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:24:28 PM

14

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:24:37 PM

33

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:25:10 PM

36

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:10 PM

8

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:20 PM

1

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:20 PM

32

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:25:27 PM

10

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:34 PM

85

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

15

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

13

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

22

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

14

1231.50

XCSE

59


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:25:34 PM

13

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

14

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

2

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

27

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

35

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

14

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

42

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

14

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

7

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:34 PM

78

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:42 PM

9

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:42 PM

2

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:42 PM

15

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:42 PM

16

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:42 PM

36

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:52 PM

82

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:25:52 PM

2

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

3

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

7

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

8

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

2

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

3

1230.50

TQEX

GENMAB A/S

10-Apr-2025

16:25:52 PM

82

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:25:52 PM

18

1230.50

AQEU

GENMAB A/S

10-Apr-2025

16:26:27 PM

16

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:27 PM

42

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:27 PM

15

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:27 PM

13

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:58 PM

87

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:58 PM

7

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:58 PM

5

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:58 PM

69

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:26:58 PM

38

1233.00

TQEX

GENMAB A/S

10-Apr-2025

16:26:58 PM

84

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:26:58 PM

15

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:26:58 PM

15

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:26:58 PM

15

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:26:58 PM

30

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:26:58 PM

20

1232.00

AQEU

GENMAB A/S

10-Apr-2025

16:26:58 PM

5

1232.00

AQEU

GENMAB A/S

10-Apr-2025

16:26:58 PM

3

1232.00

AQEU

GENMAB A/S

10-Apr-2025

16:27:25 PM

86

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:27:25 PM

1

1232.00

AQEU

60


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:27:26 PM

15

1232.00

AQEU

GENMAB A/S

10-Apr-2025

16:27:43 PM

14

1232.00

AQEU

GENMAB A/S

10-Apr-2025

16:27:50 PM

16

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:27:50 PM

5

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:27:50 PM

5

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:27:59 PM

3

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:28:16 PM

12

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:28:16 PM

21

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:28:16 PM

19

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:28:16 PM

79

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:28:16 PM

4

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:28:16 PM

8

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:28:16 PM

3

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:28:16 PM

8

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:28:16 PM

8

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:28:16 PM

5

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:28:16 PM

4

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:28:24 PM

8

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:28:28 PM

2

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:28:55 PM

33

1231.00

TQEX

GENMAB A/S

10-Apr-2025

16:28:55 PM

3

1231.00

TQEX

GENMAB A/S

10-Apr-2025

16:28:55 PM

9

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:28:55 PM

11

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:28:55 PM

51

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:28:58 PM

9

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:28:58 PM

17

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:29:04 PM

80

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:20 PM

32

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:29:28 PM

32

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:29:29 PM

7

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:29:41 PM

24

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

60

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

40

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

13

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

37

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

22

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

23

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

60

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:29:41 PM

85

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:29:41 PM

19

1231.00

AQEU

GENMAB A/S

10-Apr-2025

16:29:41 PM

6

1230.00

AQEU

GENMAB A/S

10-Apr-2025

16:29:41 PM

2

1230.00

AQEU

GENMAB A/S

10-Apr-2025

16:29:41 PM

3

1230.00

AQEU

61


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:29:41 PM

15

1230.00

AQEU

GENMAB A/S

10-Apr-2025

16:29:59 PM

56

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:29:59 PM

15

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:29:59 PM

72

1230.50

CEUX

GENMAB A/S

10-Apr-2025

16:30:23 PM

2

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:30:23 PM

24

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:30:25 PM

8

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:30:25 PM

6

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:30:25 PM

11

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:30:25 PM

3

1231.50

CEUX

GENMAB A/S

10-Apr-2025

16:31:16 PM

7

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:31:16 PM

4

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

4

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

3

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

2

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

4

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

8

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

4

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

4

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:16 PM

10

1232.00

TQEX

GENMAB A/S

10-Apr-2025

16:31:17 PM

40

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:31:17 PM

10

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:31:17 PM

31

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:31:17 PM

32

1232.00

CEUX

GENMAB A/S

10-Apr-2025

16:31:27 PM

19

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:31:27 PM

59

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:07 PM

4

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:07 PM

3

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:40 PM

88

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

100

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

12

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

100

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

12

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

63

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

21

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:32:41 PM

8

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:41 PM

9

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:41 PM

18

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:41 PM

87

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:52 PM

15

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:32:52 PM

42

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:32:52 PM

29

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:32:52 PM

22

1234.00

XCSE

62


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:32:52 PM

67

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:52 PM

33

1234.00

AQEU

GENMAB A/S

10-Apr-2025

16:32:53 PM

43

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:32:54 PM

83

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:32:58 PM

27

1233.00

AQEU

GENMAB A/S

10-Apr-2025

16:33:17 PM

9

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:33:17 PM

7

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:33:17 PM

13

1233.50

TQEX

GENMAB A/S

10-Apr-2025

16:33:17 PM

27

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:33:18 PM

3

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

3

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

5

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

4

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

3

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

3

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

43

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:18 PM

37

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:33:42 PM

25

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:42 PM

39

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:33:42 PM

24

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:33:42 PM

19

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:33:42 PM

68

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:34:06 PM

52

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:34:06 PM

26

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:34:07 PM

100

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:12 PM

28

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:34:17 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:18 PM

10

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:34:18 PM

5

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:34:32 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:32 PM

3

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:32 PM

11

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:32 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:37 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:37 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:39 PM

37

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:56 PM

63

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:34:56 PM

12

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:56 PM

30

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:56 PM

24

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:34:56 PM

3

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:35:00 PM

16

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:35:01 PM

87

1234.00

XCSE

63


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:35:15 PM

39

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:35:52 PM

18

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:35:52 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:35:52 PM

15

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:36:08 PM

36

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:36:17 PM

6

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:36:17 PM

82

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:36:21 PM

85

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

5

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

17

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

30

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

42

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

18

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:36:21 PM

47

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:36:21 PM

10

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:36:21 PM

5

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:36:21 PM

42

1234.00

AQEU

GENMAB A/S

10-Apr-2025

16:36:35 PM

62

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:37:16 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:18 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:30 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:33 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:33 PM

36

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:37:35 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:37 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:40 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:41 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:46 PM

36

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:37:47 PM

6

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:47 PM

4

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:37:47 PM

2

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:37:47 PM

4

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:37:57 PM

40

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:57 PM

15

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:57 PM

3

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:57 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:57 PM

24

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:37:57 PM

30

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:37:57 PM

2

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:37:57 PM

87

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:37:57 PM

32

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:37:58 PM

13

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

13

1235.50

XCSE

64


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:37:58 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

14

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

14

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

14

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

24

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:58 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:59 PM

24

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:59 PM

14

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:59 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:37:59 PM

11

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:08 PM

1

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:08 PM

70

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:19 PM

68

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:20 PM

62

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:38:35 PM

62

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:35 PM

17

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:35 PM

24

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:38:37 PM

34

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:06 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:08 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:10 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:12 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:14 PM

2

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:17 PM

61

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:17 PM

18

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:39:21 PM

64

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:21 PM

32

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:39:21 PM

28

1235.50

AQEU

GENMAB A/S

10-Apr-2025

16:39:24 PM

58

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:39:24 PM

39

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:39:24 PM

52

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:39:24 PM

2

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:39:24 PM

50

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:39:24 PM

5

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:39:24 PM

11

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:39:24 PM

10

1234.00

AQEU

GENMAB A/S

10-Apr-2025

16:39:28 PM

25

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:39:28 PM

14

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:39:46 PM

30

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:14 PM

44

1234.50

XCSE

65


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:40:14 PM

22

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:40:14 PM

42

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:40:14 PM

16

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:40:14 PM

23

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:40:14 PM

5

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:40:14 PM

10

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:40:34 PM

63

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:40:40 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:40 PM

25

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:40 PM

42

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:40 PM

15

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:40 PM

15

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:40:58 PM

1

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:41:15 PM

7

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:15 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:21 PM

21

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:21 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:21 PM

16

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:21 PM

36

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:41:22 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:22 PM

30

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:22 PM

42

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:22 PM

15

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:22 PM

11

1235.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:22 PM

32

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:41:22 PM

32

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:41:26 PM

86

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:26 PM

4

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:26 PM

36

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:26 PM

33

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:31 PM

28

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:31 PM

3

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:41:31 PM

17

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:41:31 PM

6

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:41:31 PM

17

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:31 PM

11

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:36 PM

25

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:41:40 PM

26

1234.50

AQEU

GENMAB A/S

10-Apr-2025

16:41:52 PM

14

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:52 PM

30

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:41:54 PM

18

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:54 PM

15

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:41:54 PM

10

1234.00

TQEX

66


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:41:54 PM

5

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:41:54 PM

12

1234.00

TQEX

GENMAB A/S

10-Apr-2025

16:41:54 PM

63

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:54 PM

3

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:41:54 PM

5

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:42:08 PM

2

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

43

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

10

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

15

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

15

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

5

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:42:32 PM

38

1237.00

TQEX

GENMAB A/S

10-Apr-2025

16:42:32 PM

56

1236.50

CEUX

GENMAB A/S

10-Apr-2025

16:42:32 PM

39

1237.00

AQEU

GENMAB A/S

10-Apr-2025

16:43:04 PM

42

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

16

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

36

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

14

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

4

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

11

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

14

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

42

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

14

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:04 PM

31

1238.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:08 PM

32

1237.50

CEUX

GENMAB A/S

10-Apr-2025

16:43:11 PM

83

1237.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:11 PM

39

1237.00

CEUX

GENMAB A/S

10-Apr-2025

16:43:18 PM

67

1236.00

XCSE

GENMAB A/S

10-Apr-2025

16:43:18 PM

40

1236.00

CEUX

GENMAB A/S

10-Apr-2025

16:44:02 PM

36

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:44:10 PM

20

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:10 PM

8

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:10 PM

20

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:10 PM

27

1235.00

CEUX

GENMAB A/S

10-Apr-2025

16:44:10 PM

64

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:44:12 PM

3

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:44:15 PM

36

1235.00

TQEX

GENMAB A/S

10-Apr-2025

16:44:26 PM

3

1235.00

AQEU

GENMAB A/S

10-Apr-2025

16:44:42 PM

30

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

2

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

7

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

22

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

2

1235.00

XCSE

67


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:44:42 PM

45

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

42

1235.00

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

27

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:44:42 PM

36

1235.50

CEUX

GENMAB A/S

10-Apr-2025

16:44:42 PM

2

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:44:42 PM

34

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:44:42 PM

38

1235.00

AQEU

GENMAB A/S

10-Apr-2025

16:45:04 PM

52

1234.50

CEUX

GENMAB A/S

10-Apr-2025

16:45:06 PM

42

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:45:06 PM

1

1234.50

XCSE

GENMAB A/S

10-Apr-2025

16:45:15 PM

3

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:45:15 PM

18

1234.00

CEUX

GENMAB A/S

10-Apr-2025

16:45:15 PM

13

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:45:16 PM

2

1234.00

XCSE

GENMAB A/S

10-Apr-2025

16:45:38 PM

26

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:45:38 PM

18

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:45:42 PM

67

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:45:42 PM

42

1233.50

AQEU

GENMAB A/S

10-Apr-2025

16:46:26 PM

28

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:27 PM

14

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:28 PM

30

1233.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:28 PM

30

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:28 PM

42

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:28 PM

10

1233.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:28 PM

36

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:28 PM

3

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:28 PM

7

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:28 PM

9

1233.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:29 PM

30

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:29 PM

40

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:46:29 PM

32

1233.00

CEUX

GENMAB A/S

10-Apr-2025

16:46:29 PM

1

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:29 PM

37

1232.50

CEUX

GENMAB A/S

10-Apr-2025

16:46:36 PM

16

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

23

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

25

1232.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

42

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

30

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

15

1232.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:36 PM

26

1232.50

TQEX

GENMAB A/S

10-Apr-2025

16:46:49 PM

30

1231.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:49 PM

10

1231.00

CEUX

GENMAB A/S

10-Apr-2025

16:46:49 PM

32

1231.00

CEUX

68


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:46:56 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

4

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

4

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

7

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

8

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

7

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

4

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

13

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

2

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

42

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:56 PM

15

1231.00

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

10

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

75

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

30

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

11

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

4

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

5

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

15

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

25

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

22

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:46:59 PM

8

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:46:59 PM

31

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:47:02 PM

30

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:02 PM

42

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:02 PM

26

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:47:03 PM

10

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:03 PM

42

1230.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:08 PM

30

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:47:08 PM

42

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:47:12 PM

87

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:14 PM

26

1230.00

XCSE

GENMAB A/S

10-Apr-2025

16:47:14 PM

39

1230.00

CEUX

GENMAB A/S

10-Apr-2025

16:47:22 PM

7

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:47:22 PM

19

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

15

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

50

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

3

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

12

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

3

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

2

1229.00

XCSE

69


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:48:10 PM

7

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

9

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

4

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

36

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

52

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:10 PM

36

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:48:10 PM

8

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:10 PM

2

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:10 PM

3

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:10 PM

30

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:12 PM

52

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:12 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:12 PM

30

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:48:12 PM

51

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:12 PM

3

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:12 PM

5

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:12 PM

3

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:12 PM

2

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:12 PM

4

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:27 PM

73

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:27 PM

32

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:48:33 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:33 PM

2

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:33 PM

3

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:33 PM

2

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:33 PM

2

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:33 PM

47

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:48:40 PM

6

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:48:41 PM

15

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:41 PM

52

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:50 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:48:56 PM

5

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:48:56 PM

5

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:48:56 PM

16

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:48:56 PM

45

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:49:09 PM

32

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:49:24 PM

74

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:26 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:26 PM

36

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:49:26 PM

7

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:49:26 PM

23

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:49:28 PM

14

1228.00

XCSE

70


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:49:28 PM

52

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:28 PM

32

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:49:28 PM

37

1227.50

CEUX

GENMAB A/S

10-Apr-2025

16:49:53 PM

82

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:53 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:53 PM

52

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:53 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:53 PM

46

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:49:53 PM

32

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:49:53 PM

34

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:49:55 PM

52

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:55 PM

15

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:55 PM

13

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:55 PM

16

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:49:55 PM

16

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:50:01 PM

52

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:50:07 PM

52

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:50:07 PM

10

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:50:17 PM

26

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:50:17 PM

18

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:50:17 PM

9

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:50:26 PM

35

1227.50

CEUX

GENMAB A/S

10-Apr-2025

16:50:49 PM

29

1227.50

TQEX

GENMAB A/S

10-Apr-2025

16:50:49 PM

27

1227.50

CEUX

GENMAB A/S

10-Apr-2025

16:51:04 PM

36

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:51:09 PM

33

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:51:19 PM

4

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:19 PM

12

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:23 PM

23

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:51:49 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:49 PM

37

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:49 PM

14

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:49 PM

13

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:49 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:49 PM

17

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:51:49 PM

36

1229.50

CEUX

GENMAB A/S

10-Apr-2025

16:51:50 PM

16

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:50 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:50 PM

37

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

15

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

30

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

15

1229.50

XCSE

71


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:51:51 PM

14

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:51 PM

30

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

14

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

52

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

30

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

16

1229.50

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

89

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

13

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

15

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

15

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

37

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:51:52 PM

1

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:51:52 PM

40

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:51:52 PM

25

1229.00

AQEU

GENMAB A/S

10-Apr-2025

16:51:52 PM

8

1229.00

AQEU

GENMAB A/S

10-Apr-2025

16:51:52 PM

2

1229.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:05 PM

15

1229.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:09 PM

14

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:09 PM

52

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:09 PM

37

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:09 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:52:09 PM

8

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:09 PM

7

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:09 PM

36

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:52:10 PM

16

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:30 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:30 PM

4

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:30 PM

4

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:30 PM

2

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:30 PM

8

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:30 PM

9

1228.00

TQEX

GENMAB A/S

10-Apr-2025

16:52:30 PM

7

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:30 PM

27

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:30 PM

4

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:30 PM

2

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:30 PM

11

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:30 PM

4

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:30 PM

8

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:32 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:34 PM

2

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:35 PM

79

1228.00

XCSE

72


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:52:35 PM

36

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:36 PM

36

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:36 PM

10

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:52:37 PM

12

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:52:37 PM

7

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:52:37 PM

3

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:52:38 PM

16

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:52:40 PM

36

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:52:49 PM

36

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:52:51 PM

31

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:52 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:52 PM

3

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:55 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:57 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:52:59 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:01 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:03 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:05 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:07 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:07 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:09 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:11 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:12 PM

5

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:13 PM

2

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:14 PM

3

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:15 PM

15

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:15 PM

36

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:53:15 PM

5

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:53:15 PM

25

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:53:15 PM

9

1228.00

CEUX

GENMAB A/S

10-Apr-2025

16:53:15 PM

16

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:53:15 PM

12

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:53:16 PM

13

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:17 PM

19

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:17 PM

10

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:17 PM

5

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:17 PM

10

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:17 PM

4

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:19 PM

36

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:19 PM

35

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:53:19 PM

6

1228.00

AQEU

GENMAB A/S

10-Apr-2025

16:53:22 PM

12

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:24 PM

30

1229.00

XCSE

73


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

10-Apr-2025

16:53:24 PM

26

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:24 PM

37

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:24 PM

13

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:24 PM

6

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:24 PM

4

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:53:24 PM

4

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:53:24 PM

3

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:53:24 PM

2

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:53:24 PM

3

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:53:25 PM

30

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:25 PM

26

1229.00

XCSE

GENMAB A/S

10-Apr-2025

16:53:32 PM

16

1228.50

TQEX

GENMAB A/S

10-Apr-2025

16:54:05 PM

6

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:05 PM

34

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:05 PM

36

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:05 PM

7

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:05 PM

9

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:05 PM

9

1229.00

CEUX

GENMAB A/S

10-Apr-2025

16:54:13 PM

52

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:54:13 PM

32

1228.50

CEUX

GENMAB A/S

10-Apr-2025

16:54:13 PM

15

1228.50

AQEU

GENMAB A/S

10-Apr-2025

16:54:13 PM

25

1228.50

AQEU

GENMAB A/S

10-Apr-2025

16:54:13 PM

10

1228.50

AQEU

GENMAB A/S

10-Apr-2025

16:54:22 PM

2

1228.50

XCSE

GENMAB A/S

10-Apr-2025

16:54:22 PM

9

1228.50

AQEU

GENMAB A/S

10-Apr-2025

16:54:26 PM

86

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

24

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

10

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

5

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

73

1228.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

16

1227.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

2

1227.00

XCSE

GENMAB A/S

10-Apr-2025

16:54:26 PM

8

1227.50

CEUX

GENMAB A/S

10-Apr-2025

16:54:26 PM

30

1227.50

CEUX

GENMAB A/S

10-Apr-2025

16:54:27 PM

11

1227.00

XCSE

GENMAB A/S

11-Apr-2025

10:23:39 AM

19

1211.00

XCSE

GENMAB A/S

11-Apr-2025

10:23:39 AM

15

1211.00

XCSE

GENMAB A/S

11-Apr-2025

10:23:39 AM

10

1211.00

XCSE

GENMAB A/S

11-Apr-2025

10:23:39 AM

80

1211.00

CEUX

GENMAB A/S

11-Apr-2025

10:23:40 AM

38

1211.00

XCSE

GENMAB A/S

11-Apr-2025

10:26:11 AM

82

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:26:11 AM

86

1213.50

TQEX

GENMAB A/S

11-Apr-2025

10:26:11 AM

52

1213.50

CEUX

74


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

10:26:14 AM

88

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:26:19 AM

22

1213.50

XCSE

GENMAB A/S

11-Apr-2025

10:26:19 AM

65

1213.50

XCSE

GENMAB A/S

11-Apr-2025

10:26:19 AM

63

1213.50

CEUX

GENMAB A/S

11-Apr-2025

10:26:27 AM

41

1213.00

AQEU

GENMAB A/S

11-Apr-2025

10:26:36 AM

30

1213.00

AQEU

GENMAB A/S

11-Apr-2025

10:26:45 AM

9

1213.00

AQEU

GENMAB A/S

11-Apr-2025

10:27:09 AM

79

1212.50

TQEX

GENMAB A/S

11-Apr-2025

10:27:09 AM

49

1212.50

CEUX

GENMAB A/S

11-Apr-2025

10:27:54 AM

88

1212.00

XCSE

GENMAB A/S

11-Apr-2025

10:27:54 AM

46

1212.00

AQEU

GENMAB A/S

11-Apr-2025

10:27:54 AM

26

1212.00

AQEU

GENMAB A/S

11-Apr-2025

10:27:55 AM

3

1212.00

AQEU

GENMAB A/S

11-Apr-2025

10:28:06 AM

28

1211.50

TQEX

GENMAB A/S

11-Apr-2025

10:28:06 AM

47

1211.50

TQEX

GENMAB A/S

11-Apr-2025

10:28:06 AM

39

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:28:06 AM

19

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:28:25 AM

21

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:28:25 AM

23

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:28:35 AM

10

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:28:35 AM

16

1211.50

CEUX

GENMAB A/S

11-Apr-2025

10:29:09 AM

65

1211.00

XCSE

GENMAB A/S

11-Apr-2025

10:29:09 AM

77

1211.00

AQEU

GENMAB A/S

11-Apr-2025

10:30:38 AM

17

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:30:38 AM

66

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:30:47 AM

81

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:30:48 AM

88

1212.00

CEUX

GENMAB A/S

11-Apr-2025

10:32:28 AM

3

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:32:28 AM

10

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:34:35 AM

14

1213.50

XCSE

GENMAB A/S

11-Apr-2025

10:34:35 AM

14

1213.50

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

41

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

14

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

14

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

14

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

20

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

61

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:34:59 AM

16

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:35:08 AM

2

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:35:08 AM

80

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:35:25 AM

4

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:35:25 AM

61

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:35:25 AM

34

1214.00

XCSE

75


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

10:37:05 AM

81

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:38:47 AM

31

1214.50

TQEX

GENMAB A/S

11-Apr-2025

10:38:52 AM

82

1214.00

CEUX

GENMAB A/S

11-Apr-2025

10:38:53 AM

11

1215.50

CEUX

GENMAB A/S

11-Apr-2025

10:38:53 AM

17

1215.50

CEUX

GENMAB A/S

11-Apr-2025

10:38:53 AM

11

1215.50

CEUX

GENMAB A/S

11-Apr-2025

10:39:10 AM

30

1215.00

TQEX

GENMAB A/S

11-Apr-2025

10:39:10 AM

83

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:39:27 AM

100

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

11

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

16

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

12

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

32

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

51

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:27 AM

84

1214.00

CEUX

GENMAB A/S

11-Apr-2025

10:39:28 AM

13

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:28 AM

14

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:32 AM

100

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:32 AM

11

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:39:33 AM

100

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

72

1216.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

14

1216.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

30

1216.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

12

1216.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

13

1216.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

85

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

40

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

41

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:40:39 AM

13

1216.50

TQEX

GENMAB A/S

11-Apr-2025

10:40:39 AM

15

1216.50

TQEX

GENMAB A/S

11-Apr-2025

10:40:39 AM

30

1214.50

TQEX

GENMAB A/S

11-Apr-2025

10:40:39 AM

86

1216.50

CEUX

GENMAB A/S

11-Apr-2025

10:40:39 AM

84

1215.50

CEUX

GENMAB A/S

11-Apr-2025

10:40:39 AM

88

1214.00

CEUX

GENMAB A/S

11-Apr-2025

10:41:01 AM

12

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:41:01 AM

2

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:41:08 AM

79

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:41:08 AM

41

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:41:08 AM

12

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:41:08 AM

23

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:44:16 AM

5

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:44:19 AM

13

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:44:19 AM

41

1215.50

XCSE

76


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

10:44:19 AM

11

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:44:19 AM

32

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:45:03 AM

41

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

30

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

12

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

12

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

13

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

3

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

12

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

35

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

61

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

3

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

28

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

11

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

13

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

13

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

4

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

41

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

1

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:03 AM

87

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:45:04 AM

26

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:04 AM

2

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:04 AM

24

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:04 AM

36

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:45:04 AM

26

1214.50

TQEX

GENMAB A/S

11-Apr-2025

10:46:43 AM

37

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:46:43 AM

14

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:46:43 AM

10

1214.50

XCSE

GENMAB A/S

11-Apr-2025

10:47:17 AM

40

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:47:17 AM

15

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:47:17 AM

17

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:47:17 AM

12

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:47:43 AM

9

1215.50

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

1

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

11

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

13

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

2

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

4

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

12

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:12 AM

61

1216.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:33 AM

82

1215.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:33 AM

42

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:48:33 AM

20

1214.00

TQEX

77


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

10:48:33 AM

56

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:48:33 AM

27

1215.00

CEUX

GENMAB A/S

11-Apr-2025

10:48:33 AM

40

1214.00

CEUX

GENMAB A/S

11-Apr-2025

10:49:09 AM

43

1214.00

XCSE

GENMAB A/S

11-Apr-2025

10:49:09 AM

15

1214.00

TQEX

GENMAB A/S

11-Apr-2025

10:51:06 AM

6

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:51:06 AM

2

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:51:48 AM

82

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:51:48 AM

25

1213.00

TQEX

GENMAB A/S

11-Apr-2025

10:51:48 AM

58

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:53:16 AM

83

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:54:23 AM

82

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

50

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

61

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

10

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

61

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

15

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:23 AM

24

1212.00

TQEX

GENMAB A/S

11-Apr-2025

10:54:23 AM

82

1212.00

CEUX

GENMAB A/S

11-Apr-2025

10:54:48 AM

20

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:54:49 AM

20

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:54:56 AM

17

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:54:56 AM

26

1213.00

XCSE

GENMAB A/S

11-Apr-2025

10:54:57 AM

66

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:54:57 AM

1

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:55:02 AM

16

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:55:45 AM

86

1212.00

CEUX

GENMAB A/S

11-Apr-2025

10:55:52 AM

29

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:56:25 AM

85

1213.00

CEUX

GENMAB A/S

11-Apr-2025

10:56:26 AM

15

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:56:53 AM

69

1212.50

XCSE

GENMAB A/S

11-Apr-2025

10:56:53 AM

24

1212.50

TQEX

GENMAB A/S

11-Apr-2025

10:56:54 AM

81

1212.00

CEUX

GENMAB A/S

11-Apr-2025

10:57:14 AM

58

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:57:28 AM

14

1211.00

TQEX

GENMAB A/S

11-Apr-2025

10:57:34 AM

12

1211.00

TQEX

GENMAB A/S

11-Apr-2025

10:57:48 AM

10

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:58:01 AM

46

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:58:01 AM

29

1211.50

XCSE

GENMAB A/S

11-Apr-2025

10:58:20 AM

22

1211.00

TQEX

GENMAB A/S

11-Apr-2025

10:58:38 AM

83

1210.50

XCSE

GENMAB A/S

11-Apr-2025

10:58:38 AM

5

1211.00

TQEX

GENMAB A/S

11-Apr-2025

10:58:38 AM

24

1210.00

TQEX

78


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

10:58:38 AM

19

1210.50

CEUX

GENMAB A/S

11-Apr-2025

10:58:38 AM

69

1210.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:00 AM

17

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:00:00 AM

36

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:00 AM

18

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:00 AM

18

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:00 AM

1

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:03 AM

14

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

66

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:00:04 AM

13

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

2

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

3

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

4

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

10

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:04 AM

1

1208.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:10 AM

8

1208.00

XCSE

GENMAB A/S

11-Apr-2025

11:00:11 AM

76

1208.00

XCSE

GENMAB A/S

11-Apr-2025

11:00:20 AM

78

1207.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:38 AM

23

1207.00

XCSE

GENMAB A/S

11-Apr-2025

11:00:38 AM

61

1207.00

XCSE

GENMAB A/S

11-Apr-2025

11:00:38 AM

13

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:38 AM

43

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:00:59 AM

87

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:01:03 AM

27

1205.50

TQEX

GENMAB A/S

11-Apr-2025

11:01:14 AM

86

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:01:43 AM

22

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:01:43 AM

7

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:01:45 AM

81

1206.50

XCSE

GENMAB A/S

11-Apr-2025

11:02:05 AM

22

1206.00

CEUX

GENMAB A/S

11-Apr-2025

11:02:41 AM

86

1205.50

XCSE

GENMAB A/S

11-Apr-2025

11:02:41 AM

2

1206.00

CEUX

GENMAB A/S

11-Apr-2025

11:02:41 AM

27

1205.00

CEUX

GENMAB A/S

11-Apr-2025

11:03:35 AM

58

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:03:35 AM

24

1205.00

CEUX

GENMAB A/S

11-Apr-2025

11:05:26 AM

82

1207.00

XCSE

GENMAB A/S

11-Apr-2025

11:07:26 AM

47

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:07:26 AM

6

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:07:52 AM

2

1210.50

CEUX

GENMAB A/S

11-Apr-2025

11:07:53 AM

14

1210.50

XCSE

GENMAB A/S

11-Apr-2025

11:07:53 AM

22

1210.50

XCSE

GENMAB A/S

11-Apr-2025

11:07:53 AM

8

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:07:53 AM

17

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:07:53 AM

24

1210.00

TQEX

79


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:07:53 AM

25

1210.50

CEUX

GENMAB A/S

11-Apr-2025

11:07:53 AM

61

1210.50

CEUX

GENMAB A/S

11-Apr-2025

11:08:06 AM

2

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:08:06 AM

57

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:08:10 AM

3

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:08:10 AM

2

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:08:10 AM

10

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:08:10 AM

10

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:09:26 AM

12

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:09:49 AM

37

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:09:49 AM

48

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

30

1210.50

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

12

1210.50

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

13

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

41

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

15

1211.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

7

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

78

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:26 AM

2

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:26 AM

13

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:26 AM

5

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:26 AM

88

1210.50

CEUX

GENMAB A/S

11-Apr-2025

11:10:29 AM

4

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:29 AM

3

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:29 AM

2

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:29 AM

4

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:29 AM

15

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:10:29 AM

47

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:10:55 AM

25

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:55 AM

56

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:10:55 AM

5

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:55 AM

15

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:10:55 AM

4

1210.00

TQEX

GENMAB A/S

11-Apr-2025

11:11:50 AM

11

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:11:50 AM

15

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:11:50 AM

60

1210.00

XCSE

GENMAB A/S

11-Apr-2025

11:11:51 AM

12

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:11:51 AM

15

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:11:51 AM

17

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:11:59 AM

8

1209.50

CEUX

GENMAB A/S

11-Apr-2025

11:12:00 AM

14

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:12:04 AM

72

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:12:35 AM

88

1208.00

XCSE

80


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:12:35 AM

21

1208.00

CEUX

GENMAB A/S

11-Apr-2025

11:12:35 AM

15

1208.00

CEUX

GENMAB A/S

11-Apr-2025

11:12:35 AM

43

1208.00

CEUX

GENMAB A/S

11-Apr-2025

11:14:59 AM

21

1207.00

TQEX

GENMAB A/S

11-Apr-2025

11:14:59 AM

1

1207.00

TQEX

GENMAB A/S

11-Apr-2025

11:15:36 AM

14

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:36 AM

13

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:36 AM

12

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:36 AM

27

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:36 AM

38

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:58 AM

82

1206.50

XCSE

GENMAB A/S

11-Apr-2025

11:15:58 AM

6

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:15:58 AM

37

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:18:03 AM

21

1207.00

XCSE

GENMAB A/S

11-Apr-2025

11:18:03 AM

3

1207.00

TQEX

GENMAB A/S

11-Apr-2025

11:18:03 AM

31

1207.00

TQEX

GENMAB A/S

11-Apr-2025

11:18:03 AM

83

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:18:49 AM

5

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:18:49 AM

11

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:18:50 AM

13

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:19:54 AM

1

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:19:54 AM

41

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:19:54 AM

38

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:19:59 AM

34

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:20:10 AM

86

1206.50

XCSE

GENMAB A/S

11-Apr-2025

11:20:10 AM

41

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:20:10 AM

38

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:20:10 AM

16

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:20:10 AM

16

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:20:10 AM

24

1207.00

TQEX

GENMAB A/S

11-Apr-2025

11:20:10 AM

51

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:20:21 AM

82

1206.00

CEUX

GENMAB A/S

11-Apr-2025

11:20:56 AM

37

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:20:56 AM

65

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:20:56 AM

6

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:20:56 AM

3

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:21:12 AM

54

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:21:12 AM

4

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:21:12 AM

27

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:21:12 AM

3

1205.00

CEUX

GENMAB A/S

11-Apr-2025

11:21:12 AM

69

1205.00

CEUX

GENMAB A/S

11-Apr-2025

11:22:57 AM

29

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:23:00 AM

49

1207.00

CEUX

81


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:23:00 AM

8

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:24:09 AM

73

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:24:12 AM

9

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:24:35 AM

58

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:24:57 AM

54

1208.00

XCSE

GENMAB A/S

11-Apr-2025

11:24:57 AM

38

1208.00

XCSE

GENMAB A/S

11-Apr-2025

11:26:26 AM

18

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:26:26 AM

2

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:26:26 AM

2

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:26:34 AM

70

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:26:58 AM

5

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:26:58 AM

3

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:26:58 AM

17

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:26:58 AM

10

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:26:59 AM

4

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:27:00 AM

4

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:27:11 AM

3

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:27:11 AM

6

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:27:11 AM

2

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:27:11 AM

3

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:27:11 AM

17

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:27:11 AM

16

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:27:11 AM

10

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:28:38 AM

56

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:29:35 AM

16

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:29:35 AM

59

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:29:56 AM

44

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:29:56 AM

9

1209.50

XCSE

GENMAB A/S

11-Apr-2025

11:30:03 AM

82

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:30:03 AM

15

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:30:03 AM

3

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:30:03 AM

7

1209.00

TQEX

GENMAB A/S

11-Apr-2025

11:30:03 AM

87

1209.00

CEUX

GENMAB A/S

11-Apr-2025

11:30:36 AM

39

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:36 AM

12

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:36 AM

14

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:58 AM

14

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:58 AM

13

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:58 AM

14

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:30:58 AM

16

1209.00

XCSE

GENMAB A/S

11-Apr-2025

11:31:00 AM

21

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:00 AM

66

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:00 AM

2

1208.50

XCSE

82


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:31:00 AM

14

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:00 AM

41

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:00 AM

41

1208.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:08 AM

6

1208.00

TQEX

GENMAB A/S

11-Apr-2025

11:31:08 AM

19

1208.00

TQEX

GENMAB A/S

11-Apr-2025

11:31:08 AM

83

1208.00

CEUX

GENMAB A/S

11-Apr-2025

11:31:16 AM

30

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:16 AM

26

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:16 AM

25

1207.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:22 AM

5

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

87

1206.50

XCSE

GENMAB A/S

11-Apr-2025

11:31:40 AM

76

1207.00

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

6

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

14

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

2

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

3

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:31:40 AM

1

1206.50

CEUX

GENMAB A/S

11-Apr-2025

11:33:06 AM

88

1206.00

XCSE

GENMAB A/S

11-Apr-2025

11:33:13 AM

23

1205.50

CEUX

GENMAB A/S

11-Apr-2025

11:33:21 AM

65

1205.50

CEUX

GENMAB A/S

11-Apr-2025

11:33:41 AM

84

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:33:41 AM

28

1205.00

TQEX

GENMAB A/S

11-Apr-2025

11:34:11 AM

35

1204.50

CEUX

GENMAB A/S

11-Apr-2025

11:34:11 AM

17

1204.50

CEUX

GENMAB A/S

11-Apr-2025

11:34:11 AM

21

1204.50

CEUX

GENMAB A/S

11-Apr-2025

11:34:52 AM

34

1204.50

CEUX

GENMAB A/S

11-Apr-2025

11:36:18 AM

38

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:36:18 AM

5

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:36:18 AM

41

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:36:18 AM

13

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:36:22 AM

86

1204.00

XCSE

GENMAB A/S

11-Apr-2025

11:37:46 AM

85

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:40:08 AM

36

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:40:08 AM

16

1205.00

XCSE

GENMAB A/S

11-Apr-2025

11:40:13 AM

19

1204.50

XCSE

GENMAB A/S

11-Apr-2025

11:40:13 AM

62

1204.50

XCSE

GENMAB A/S

11-Apr-2025

11:40:32 AM

24

1204.00

TQEX

GENMAB A/S

11-Apr-2025

11:40:32 AM

22

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:40:32 AM

52

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:41:18 AM

39

1204.00

XCSE

GENMAB A/S

11-Apr-2025

11:41:18 AM

10

1204.00

XCSE

GENMAB A/S

11-Apr-2025

11:41:36 AM

53

1204.00

XCSE

GENMAB A/S

11-Apr-2025

11:41:37 AM

87

1203.50

XCSE

83


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:41:38 AM

9

1203.00

CEUX

GENMAB A/S

11-Apr-2025

11:42:02 AM

16

1203.00

CEUX

GENMAB A/S

11-Apr-2025

11:42:12 AM

83

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:42:28 AM

19

1202.00

CEUX

GENMAB A/S

11-Apr-2025

11:43:05 AM

24

1202.50

TQEX

GENMAB A/S

11-Apr-2025

11:43:19 AM

6

1202.00

CEUX

GENMAB A/S

11-Apr-2025

11:44:44 AM

4

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:44:44 AM

15

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:44:50 AM

83

1204.50

XCSE

GENMAB A/S

11-Apr-2025

11:44:50 AM

27

1204.50

AQEU

GENMAB A/S

11-Apr-2025

11:45:16 AM

87

1204.50

XCSE

GENMAB A/S

11-Apr-2025

11:45:16 AM

9

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:16 AM

7

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:16 AM

2

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:16 AM

15

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:16 AM

12

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:16 AM

12

1204.50

AQEU

GENMAB A/S

11-Apr-2025

11:45:16 AM

19

1204.50

AQEU

GENMAB A/S

11-Apr-2025

11:45:22 AM

31

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:45:22 AM

6

1204.00

CEUX

GENMAB A/S

11-Apr-2025

11:47:14 AM

63

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:47:14 AM

81

1203.00

CEUX

GENMAB A/S

11-Apr-2025

11:47:14 AM

25

1203.50

AQEU

GENMAB A/S

11-Apr-2025

11:47:28 AM

19

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:47:28 AM

62

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:47:33 AM

7

1202.00

TQEX

GENMAB A/S

11-Apr-2025

11:47:33 AM

17

1202.00

TQEX

GENMAB A/S

11-Apr-2025

11:47:33 AM

86

1202.00

CEUX

GENMAB A/S

11-Apr-2025

11:47:34 AM

1

1201.50

AQEU

GENMAB A/S

11-Apr-2025

11:48:53 AM

10

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:31 AM

50

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:31 AM

24

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:56 AM

13

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:56 AM

14

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:56 AM

32

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:49:56 AM

16

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:50:38 AM

84

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:50:38 AM

22

1202.00

CEUX

GENMAB A/S

11-Apr-2025

11:50:38 AM

53

1202.00

CEUX

GENMAB A/S

11-Apr-2025

11:51:03 AM

84

1201.00

XCSE

GENMAB A/S

11-Apr-2025

11:51:03 AM

25

1201.50

AQEU

GENMAB A/S

11-Apr-2025

11:54:18 AM

65

1201.50

XCSE

GENMAB A/S

11-Apr-2025

11:54:18 AM

19

1201.50

XCSE

84


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

11:54:18 AM

16

1201.50

TQEX

GENMAB A/S

11-Apr-2025

11:54:18 AM

17

1201.50

TQEX

GENMAB A/S

11-Apr-2025

11:54:18 AM

43

1201.50

CEUX

GENMAB A/S

11-Apr-2025

11:54:18 AM

40

1201.50

CEUX

GENMAB A/S

11-Apr-2025

11:55:15 AM

14

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:55:27 AM

33

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:55:27 AM

30

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:55:39 AM

38

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:55:39 AM

4

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:55:39 AM

69

1202.00

XCSE

GENMAB A/S

11-Apr-2025

11:56:03 AM

36

1201.50

AQEU

GENMAB A/S

11-Apr-2025

11:57:02 AM

82

1202.50

XCSE

GENMAB A/S

11-Apr-2025

11:57:02 AM

28

1202.50

TQEX

GENMAB A/S

11-Apr-2025

11:57:02 AM

81

1202.50

CEUX

GENMAB A/S

11-Apr-2025

11:57:33 AM

12

1203.00

XCSE

GENMAB A/S

11-Apr-2025

11:58:17 AM

88

1204.00

XCSE

GENMAB A/S

11-Apr-2025

11:58:17 AM

17

1204.00

TQEX

GENMAB A/S

11-Apr-2025

11:58:17 AM

8

1203.50

CEUX

GENMAB A/S

11-Apr-2025

11:58:17 AM

13

1203.50

CEUX

GENMAB A/S

11-Apr-2025

11:58:30 AM

63

1203.50

CEUX

GENMAB A/S

11-Apr-2025

11:59:25 AM

13

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:59:25 AM

11

1203.50

XCSE

GENMAB A/S

11-Apr-2025

11:59:25 AM

63

1203.00

XCSE

GENMAB A/S

11-Apr-2025

11:59:25 AM

3

1203.00

XCSE

GENMAB A/S

11-Apr-2025

11:59:25 AM

5

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:00:23 PM

31

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:00:23 PM

22

1202.50

CEUX

GENMAB A/S

11-Apr-2025

12:00:23 PM

61

1202.50

CEUX

GENMAB A/S

11-Apr-2025

12:00:42 PM

35

1203.50

AQEU

GENMAB A/S

11-Apr-2025

12:00:55 PM

19

1204.00

XCSE

GENMAB A/S

11-Apr-2025

12:00:55 PM

23

1204.00

XCSE

GENMAB A/S

11-Apr-2025

12:01:25 PM

83

1204.00

XCSE

GENMAB A/S

11-Apr-2025

12:01:25 PM

32

1204.00

TQEX

GENMAB A/S

11-Apr-2025

12:01:25 PM

84

1204.00

CEUX

GENMAB A/S

11-Apr-2025

12:01:49 PM

1

1203.50

AQEU

GENMAB A/S

11-Apr-2025

12:02:33 PM

51

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:02:39 PM

81

1203.00

CEUX

GENMAB A/S

11-Apr-2025

12:03:03 PM

25

1203.00

TQEX

GENMAB A/S

11-Apr-2025

12:03:13 PM

24

1203.00

AQEU

GENMAB A/S

11-Apr-2025

12:03:14 PM

25

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:03:26 PM

12

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:03:26 PM

13

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:03:26 PM

41

1203.00

XCSE

85


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

12:03:26 PM

48

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:03:30 PM

86

1202.50

XCSE

GENMAB A/S

11-Apr-2025

12:05:39 PM

81

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:05:39 PM

67

1203.50

CEUX

GENMAB A/S

11-Apr-2025

12:05:42 PM

15

1203.50

CEUX

GENMAB A/S

11-Apr-2025

12:08:13 PM

26

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:14 PM

12

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:17 PM

14

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:19 PM

13

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:26 PM

43

1203.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

13

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

11

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

69

1202.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

1

1202.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

15

1202.50

XCSE

GENMAB A/S

11-Apr-2025

12:08:31 PM

24

1202.50

TQEX

GENMAB A/S

11-Apr-2025

12:08:31 PM

81

1202.50

CEUX

GENMAB A/S

11-Apr-2025

12:09:29 PM

86

1202.50

XCSE

GENMAB A/S

11-Apr-2025

12:09:29 PM

84

1202.50

CEUX

GENMAB A/S

11-Apr-2025

12:09:34 PM

25

1202.00

AQEU

GENMAB A/S

11-Apr-2025

12:10:08 PM

81

1201.50

XCSE

GENMAB A/S

11-Apr-2025

12:10:08 PM

31

1201.50

TQEX

GENMAB A/S

11-Apr-2025

12:10:08 PM

88

1201.50

CEUX

GENMAB A/S

11-Apr-2025

12:11:18 PM

24

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:11:23 PM

28

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:11:27 PM

84

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:11:27 PM

23

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:11:27 PM

9

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:12:56 PM

87

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:12:56 PM

24

1200.00

TQEX

GENMAB A/S

11-Apr-2025

12:12:56 PM

47

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:12:56 PM

16

1200.00

CEUX

GENMAB A/S

11-Apr-2025

12:13:57 PM

10

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:13:57 PM

16

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:13:57 PM

56

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:13:57 PM

2

1200.00

XCSE

GENMAB A/S

11-Apr-2025

12:16:04 PM

21

1199.00

XCSE

GENMAB A/S

11-Apr-2025

12:16:04 PM

60

1199.00

XCSE

GENMAB A/S

11-Apr-2025

12:16:04 PM

28

1199.50

XCSE

GENMAB A/S

11-Apr-2025

12:16:42 PM

6

1199.00

XCSE

GENMAB A/S

11-Apr-2025

12:16:42 PM

77

1199.00

XCSE

GENMAB A/S

11-Apr-2025

12:16:42 PM

2

1199.00

TQEX

GENMAB A/S

11-Apr-2025

12:16:42 PM

25

1199.00

TQEX

86


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

12:17:08 PM

27

1203.00

CEUX

GENMAB A/S

11-Apr-2025

12:18:51 PM

88

1203.00

XCSE

GENMAB A/S

11-Apr-2025

12:18:51 PM

44

1202.50

AQEU

GENMAB A/S

11-Apr-2025

12:18:51 PM

55

1203.00

CEUX

GENMAB A/S

11-Apr-2025

12:20:04 PM

16

1204.00

XCSE

GENMAB A/S

11-Apr-2025

12:20:04 PM

30

1203.50

AQEU

GENMAB A/S

11-Apr-2025

12:20:04 PM

87

1203.50

CEUX

GENMAB A/S

11-Apr-2025

12:21:44 PM

16

1207.50

XCSE

GENMAB A/S

11-Apr-2025

12:21:44 PM

25

1207.50

XCSE

GENMAB A/S

11-Apr-2025

12:21:44 PM

18

1207.50

XCSE

GENMAB A/S

11-Apr-2025

12:29:44 PM

12

1209.50

CEUX

GENMAB A/S

11-Apr-2025

12:30:24 PM

60

1209.00

XCSE

GENMAB A/S

11-Apr-2025

12:30:24 PM

25

1209.00

XCSE

GENMAB A/S

11-Apr-2025

12:30:24 PM

26

1209.00

TQEX

GENMAB A/S

11-Apr-2025

12:30:24 PM

10

1209.00

TQEX

GENMAB A/S

11-Apr-2025

12:30:24 PM

86

1209.00

CEUX

GENMAB A/S

11-Apr-2025

12:30:24 PM

36

1209.00

CEUX

GENMAB A/S

11-Apr-2025

12:30:25 PM

25

1209.00

AQEU

GENMAB A/S

11-Apr-2025

12:30:25 PM

2

1209.00

AQEU

GENMAB A/S

11-Apr-2025

12:31:20 PM

16

1211.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:30 PM

65

1213.00

XCSE

GENMAB A/S

11-Apr-2025

12:35:30 PM

41

1213.00

XCSE

GENMAB A/S

11-Apr-2025

12:35:30 PM

2

1213.00

XCSE

GENMAB A/S

11-Apr-2025

12:35:30 PM

3

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:30 PM

4

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:30 PM

9

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:31 PM

11

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:31 PM

11

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:35:32 PM

17

1213.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:17 PM

35

1215.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:17 PM

46

1215.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:17 PM

85

1215.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:23 PM

88

1215.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:23 PM

44

1215.50

TQEX

GENMAB A/S

11-Apr-2025

12:37:23 PM

83

1215.50

CEUX

GENMAB A/S

11-Apr-2025

12:37:24 PM

32

1215.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:34 PM

14

1217.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:34 PM

13

1217.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:34 PM

26

1217.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:34 PM

13

1217.00

XCSE

GENMAB A/S

11-Apr-2025

12:37:34 PM

39

1216.50

AQEU

GENMAB A/S

11-Apr-2025

12:37:34 PM

25

1216.50

TQEX

GENMAB A/S

11-Apr-2025

12:37:34 PM

6

1217.00

CEUX

87


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

12:37:34 PM

7

1217.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:34 PM

6

1217.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:34 PM

5

1217.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:34 PM

15

1217.00

CEUX

GENMAB A/S

11-Apr-2025

12:37:37 PM

26

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:37 PM

13

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:37 PM

12

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:37 PM

13

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:37 PM

41

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:37 PM

6

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

26

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

14

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

13

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

14

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

44

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

31

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

12

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

41

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

14

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:37:38 PM

13

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:38:15 PM

88

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:38:15 PM

27

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:38:15 PM

26

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:38:15 PM

26

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:38:15 PM

26

1218.50

TQEX

GENMAB A/S

11-Apr-2025

12:38:15 PM

86

1218.50

CEUX

GENMAB A/S

11-Apr-2025

12:40:11 PM

85

1219.50

CEUX

GENMAB A/S

11-Apr-2025

12:40:12 PM

30

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:12 PM

41

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:14 PM

35

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:14 PM

30

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:14 PM

65

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:19 PM

35

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:19 PM

65

1219.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:20 PM

85

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:40:20 PM

31

1218.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:20 PM

5

1218.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:20 PM

45

1218.00

XCSE

GENMAB A/S

11-Apr-2025

12:40:20 PM

61

1218.50

CEUX

GENMAB A/S

11-Apr-2025

12:40:20 PM

25

1218.50

CEUX

GENMAB A/S

11-Apr-2025

12:40:20 PM

39

1217.50

CEUX

GENMAB A/S

11-Apr-2025

12:40:22 PM

81

1217.50

XCSE

GENMAB A/S

11-Apr-2025

12:40:22 PM

46

1217.50

CEUX

88


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

12:42:47 PM

59

1217.00

XCSE

GENMAB A/S

11-Apr-2025

12:43:35 PM

2

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:43:35 PM

13

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:43:35 PM

13

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:43:35 PM

69

1218.50

XCSE

GENMAB A/S

11-Apr-2025

12:45:42 PM

19

1224.00

XCSE

GENMAB A/S

11-Apr-2025

12:45:42 PM

15

1224.00

TQEX

GENMAB A/S

11-Apr-2025

12:45:42 PM

13

1224.00

TQEX

GENMAB A/S

11-Apr-2025

12:46:20 PM

81

1223.50

XCSE

GENMAB A/S

11-Apr-2025

12:46:20 PM

60

1223.00

XCSE

GENMAB A/S

11-Apr-2025

12:46:20 PM

35

1223.50

XCSE

GENMAB A/S

11-Apr-2025

12:46:20 PM

16

1223.50

XCSE

GENMAB A/S

11-Apr-2025

12:46:20 PM

28

1223.00

TQEX

GENMAB A/S

11-Apr-2025

12:46:20 PM

26

1223.50

AQEU

GENMAB A/S

11-Apr-2025

12:49:41 PM

27

1224.00

AQEU

GENMAB A/S

11-Apr-2025

12:49:42 PM

17

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

71

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

16

1226.00

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

30

1226.00

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

41

1226.00

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

4

1226.00

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

20

1226.00

XCSE

GENMAB A/S

11-Apr-2025

12:49:42 PM

25

1225.50

TQEX

GENMAB A/S

11-Apr-2025

12:49:42 PM

84

1225.50

CEUX

GENMAB A/S

11-Apr-2025

12:49:59 PM

39

1225.00

AQEU

GENMAB A/S

11-Apr-2025

12:51:03 PM

81

1224.50

XCSE

GENMAB A/S

11-Apr-2025

12:51:03 PM

84

1224.50

CEUX

GENMAB A/S

11-Apr-2025

12:52:46 PM

9

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:52:46 PM

14

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:52:46 PM

59

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:52:49 PM

26

1225.00

TQEX

GENMAB A/S

11-Apr-2025

12:52:49 PM

87

1225.00

CEUX

GENMAB A/S

11-Apr-2025

12:54:46 PM

7

1228.00

XCSE

GENMAB A/S

11-Apr-2025

12:54:46 PM

12

1228.00

XCSE

GENMAB A/S

11-Apr-2025

12:54:46 PM

13

1228.00

XCSE

GENMAB A/S

11-Apr-2025

12:54:46 PM

58

1228.00

XCSE

GENMAB A/S

11-Apr-2025

12:54:46 PM

21

1228.00

XCSE

GENMAB A/S

11-Apr-2025

12:55:19 PM

43

1226.50

XCSE

GENMAB A/S

11-Apr-2025

12:55:19 PM

45

1226.50

XCSE

GENMAB A/S

11-Apr-2025

12:55:19 PM

88

1226.50

CEUX

GENMAB A/S

11-Apr-2025

12:55:24 PM

86

1225.50

XCSE

GENMAB A/S

11-Apr-2025

12:55:24 PM

24

1225.50

AQEU

GENMAB A/S

11-Apr-2025

12:55:30 PM

14

1225.50

XCSE

89


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

12:58:05 PM

84

1227.00

XCSE

GENMAB A/S

11-Apr-2025

12:58:05 PM

25

1227.00

TQEX

GENMAB A/S

11-Apr-2025

12:58:05 PM

82

1227.00

CEUX

GENMAB A/S

11-Apr-2025

13:02:02 PM

47

1231.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

27

1232.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

42

1232.00

XCSE

GENMAB A/S

11-Apr-2025

13:02:14 PM

84

1231.00

CEUX

GENMAB A/S

11-Apr-2025

13:02:26 PM

14

1231.50

XCSE

GENMAB A/S

11-Apr-2025

13:02:26 PM

16

1231.50

XCSE

GENMAB A/S

11-Apr-2025

13:03:03 PM

81

1231.50

XCSE

GENMAB A/S

11-Apr-2025

13:03:03 PM

24

1231.50

TQEX

GENMAB A/S

11-Apr-2025

13:05:11 PM

36

1233.50

CEUX

GENMAB A/S

11-Apr-2025

13:05:12 PM

85

1233.50

XCSE

GENMAB A/S

11-Apr-2025

13:05:12 PM

12

1233.50

XCSE

GENMAB A/S

11-Apr-2025

13:05:13 PM

32

1233.50

CEUX

GENMAB A/S

11-Apr-2025

13:05:30 PM

87

1232.50

XCSE

GENMAB A/S

11-Apr-2025

13:05:30 PM

41

1233.00

XCSE

GENMAB A/S

11-Apr-2025

13:05:30 PM

30

1233.00

XCSE

GENMAB A/S

11-Apr-2025

13:05:30 PM

40

1233.00

XCSE

GENMAB A/S

11-Apr-2025

13:05:30 PM

25

1233.00

TQEX

GENMAB A/S

11-Apr-2025

13:05:30 PM

88

1233.00

CEUX

GENMAB A/S

11-Apr-2025

13:05:30 PM

83

1233.00

CEUX

GENMAB A/S

11-Apr-2025

13:05:32 PM

83

1232.50

XCSE

GENMAB A/S

11-Apr-2025

13:05:32 PM

79

1232.50

XCSE

GENMAB A/S

11-Apr-2025

13:06:20 PM

85

1232.00

CEUX

GENMAB A/S

11-Apr-2025

13:07:09 PM

87

1231.50

XCSE

GENMAB A/S

11-Apr-2025

13:07:09 PM

55

1230.00

XCSE

GENMAB A/S

11-Apr-2025

13:07:09 PM

26

1230.00

XCSE

GENMAB A/S

11-Apr-2025

13:07:09 PM

30

1230.50

AQEU

GENMAB A/S

11-Apr-2025

13:07:09 PM

84

1231.00

CEUX

GENMAB A/S

11-Apr-2025

13:07:09 PM

88

1229.50

CEUX

GENMAB A/S

11-Apr-2025

13:07:41 PM

28

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:10:29 PM

37

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:10:29 PM

33

1228.00

CEUX

GENMAB A/S

11-Apr-2025

13:10:29 PM

49

1228.00

CEUX

GENMAB A/S

11-Apr-2025

13:10:34 PM

46

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:10:35 PM

52

1226.50

CEUX

GENMAB A/S

11-Apr-2025

13:12:40 PM

24

1226.00

XCSE

GENMAB A/S

11-Apr-2025

13:12:55 PM

84

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:15:42 PM

39

1229.50

XCSE

90


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

13:15:42 PM

46

1229.50

XCSE

GENMAB A/S

11-Apr-2025

13:15:42 PM

30

1229.50

TQEX

GENMAB A/S

11-Apr-2025

13:15:42 PM

27

1229.50

AQEU

GENMAB A/S

11-Apr-2025

13:15:44 PM

41

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:15:44 PM

27

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:16:01 PM

81

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:16:01 PM

24

1228.50

TQEX

GENMAB A/S

11-Apr-2025

13:16:01 PM

66

1228.00

CEUX

GENMAB A/S

11-Apr-2025

13:16:27 PM

41

1228.00

CEUX

GENMAB A/S

11-Apr-2025

13:16:56 PM

88

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:17:39 PM

22

1227.00

CEUX

GENMAB A/S

11-Apr-2025

13:20:53 PM

33

1230.50

TQEX

GENMAB A/S

11-Apr-2025

13:20:53 PM

82

1230.50

CEUX

GENMAB A/S

11-Apr-2025

13:21:07 PM

23

1231.00

XCSE

GENMAB A/S

11-Apr-2025

13:21:07 PM

41

1231.00

XCSE

GENMAB A/S

11-Apr-2025

13:21:07 PM

47

1231.00

XCSE

GENMAB A/S

11-Apr-2025

13:23:03 PM

81

1231.00

XCSE

GENMAB A/S

11-Apr-2025

13:23:03 PM

30

1230.50

AQEU

GENMAB A/S

11-Apr-2025

13:23:03 PM

64

1231.00

CEUX

GENMAB A/S

11-Apr-2025

13:23:12 PM

86

1230.00

XCSE

GENMAB A/S

11-Apr-2025

13:23:12 PM

53

1230.00

CEUX

GENMAB A/S

11-Apr-2025

13:24:12 PM

3

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:24:12 PM

27

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:24:12 PM

35

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:24:13 PM

81

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:24:21 PM

81

1230.00

XCSE

GENMAB A/S

11-Apr-2025

13:24:21 PM

26

1230.00

TQEX

GENMAB A/S

11-Apr-2025

13:24:21 PM

29

1230.00

AQEU

GENMAB A/S

11-Apr-2025

13:24:21 PM

24

1230.00

CEUX

GENMAB A/S

11-Apr-2025

13:25:05 PM

85

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:25:05 PM

27

1229.00

CEUX

GENMAB A/S

11-Apr-2025

13:26:15 PM

25

1228.50

CEUX

GENMAB A/S

11-Apr-2025

13:26:55 PM

24

1228.50

CEUX

GENMAB A/S

11-Apr-2025

13:28:42 PM

24

1228.50

TQEX

GENMAB A/S

11-Apr-2025

13:28:42 PM

37

1228.50

CEUX

GENMAB A/S

11-Apr-2025

13:29:18 PM

10

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:29:18 PM

72

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:29:18 PM

36

1228.00

AQEU

GENMAB A/S

11-Apr-2025

13:29:18 PM

44

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:29:19 PM

82

1226.50

XCSE

GENMAB A/S

11-Apr-2025

13:29:19 PM

25

1226.50

AQEU

GENMAB A/S

11-Apr-2025

13:29:19 PM

26

1226.00

CEUX

GENMAB A/S

11-Apr-2025

13:29:41 PM

34

1226.00

XCSE

91


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

13:29:41 PM

49

1226.00

XCSE

GENMAB A/S

11-Apr-2025

13:34:15 PM

3

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:34:15 PM

2

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:34:15 PM

2

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:35:56 PM

3

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:35:56 PM

41

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:35:56 PM

14

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:35:56 PM

58

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:39:41 PM

25

1228.00

TQEX

GENMAB A/S

11-Apr-2025

13:39:41 PM

86

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:40:44 PM

29

1227.50

TQEX

GENMAB A/S

11-Apr-2025

13:40:44 PM

5

1227.50

AQEU

GENMAB A/S

11-Apr-2025

13:43:06 PM

86

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:43:06 PM

42

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:43:06 PM

69

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:43:06 PM

24

1228.00

TQEX

GENMAB A/S

11-Apr-2025

13:43:06 PM

20

1227.50

AQEU

GENMAB A/S

11-Apr-2025

13:43:06 PM

81

1228.00

CEUX

GENMAB A/S

11-Apr-2025

13:43:47 PM

85

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:43:47 PM

42

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:43:47 PM

69

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:45:24 PM

82

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:45:24 PM

44

1227.00

XCSE

GENMAB A/S

11-Apr-2025

13:45:24 PM

37

1227.50

AQEU

GENMAB A/S

11-Apr-2025

13:45:24 PM

82

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:46:28 PM

15

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:46:28 PM

12

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:46:28 PM

13

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:46:28 PM

12

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:46:28 PM

16

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:46:29 PM

13

1227.00

AQEU

GENMAB A/S

11-Apr-2025

13:47:03 PM

27

1227.00

AQEU

GENMAB A/S

11-Apr-2025

13:47:36 PM

13

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:47:36 PM

14

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:47:36 PM

19

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:47:36 PM

39

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:48:30 PM

85

1226.50

CEUX

GENMAB A/S

11-Apr-2025

13:48:31 PM

82

1226.00

XCSE

GENMAB A/S

11-Apr-2025

13:50:03 PM

25

1225.50

TQEX

GENMAB A/S

11-Apr-2025

13:50:03 PM

28

1225.50

CEUX

GENMAB A/S

11-Apr-2025

13:50:16 PM

1

1225.50

XCSE

GENMAB A/S

11-Apr-2025

13:50:16 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

13:50:29 PM

13

1225.50

XCSE

92


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

13:50:42 PM

25

1225.00

AQEU

GENMAB A/S

11-Apr-2025

13:50:43 PM

24

1225.00

XCSE

GENMAB A/S

11-Apr-2025

13:50:43 PM

1

1225.00

AQEU

GENMAB A/S

11-Apr-2025

13:52:27 PM

11

1226.50

CEUX

GENMAB A/S

11-Apr-2025

13:55:31 PM

24

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:55:31 PM

57

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:55:41 PM

21

1228.00

AQEU

GENMAB A/S

11-Apr-2025

13:55:41 PM

4

1228.00

AQEU

GENMAB A/S

11-Apr-2025

13:57:14 PM

14

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:45 PM

28

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:45 PM

9

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:45 PM

12

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:45 PM

14

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:45 PM

4

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:46 PM

12

1228.00

XCSE

GENMAB A/S

11-Apr-2025

13:57:56 PM

12

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:56 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:56 PM

68

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:56 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:56 PM

25

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:58 PM

14

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:58 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:58 PM

14

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:59 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:59 PM

12

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:57:59 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:58:16 PM

12

1228.50

XCSE

GENMAB A/S

11-Apr-2025

13:59:06 PM

34

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:59:06 PM

37

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:59:06 PM

9

1229.00

XCSE

GENMAB A/S

11-Apr-2025

13:59:06 PM

24

1228.00

TQEX

GENMAB A/S

11-Apr-2025

13:59:23 PM

56

1227.50

XCSE

GENMAB A/S

11-Apr-2025

13:59:23 PM

85

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:59:23 PM

25

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:59:23 PM

7

1227.50

CEUX

GENMAB A/S

11-Apr-2025

13:59:26 PM

58

1226.50

XCSE

GENMAB A/S

11-Apr-2025

13:59:26 PM

1

1226.50

XCSE

GENMAB A/S

11-Apr-2025

13:59:26 PM

1

1226.50

CEUX

GENMAB A/S

11-Apr-2025

13:59:27 PM

26

1226.50

CEUX

GENMAB A/S

11-Apr-2025

14:00:00 PM

24

1226.50

XCSE

GENMAB A/S

11-Apr-2025

14:00:00 PM

41

1226.50

CEUX

GENMAB A/S

11-Apr-2025

14:00:00 PM

2

1226.50

CEUX

GENMAB A/S

11-Apr-2025

14:00:05 PM

25

1225.50

XCSE

93


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

14:01:28 PM

63

1225.50

XCSE

GENMAB A/S

11-Apr-2025

14:01:28 PM

82

1225.50

CEUX

GENMAB A/S

11-Apr-2025

14:02:20 PM

24

1225.00

TQEX

GENMAB A/S

11-Apr-2025

14:02:22 PM

85

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:02:29 PM

29

1224.00

CEUX

GENMAB A/S

11-Apr-2025

14:02:29 PM

55

1224.00

CEUX

GENMAB A/S

11-Apr-2025

14:04:24 PM

82

1224.50

CEUX

GENMAB A/S

11-Apr-2025

14:05:43 PM

15

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:05:43 PM

41

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:05:43 PM

37

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:06:16 PM

16

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:06:16 PM

60

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:06:16 PM

5

1224.50

XCSE

GENMAB A/S

11-Apr-2025

14:07:46 PM

16

1225.50

XCSE

GENMAB A/S

11-Apr-2025

14:07:46 PM

24

1225.50

TQEX

GENMAB A/S

11-Apr-2025

14:09:31 PM

87

1225.00

XCSE

GENMAB A/S

11-Apr-2025

14:09:31 PM

77

1225.00

XCSE

GENMAB A/S

11-Apr-2025

14:09:31 PM

34

1225.50

XCSE

GENMAB A/S

11-Apr-2025

14:09:42 PM

85

1225.00

XCSE

GENMAB A/S

11-Apr-2025

14:10:24 PM

21

1224.50

CEUX

GENMAB A/S

11-Apr-2025

14:10:39 PM

25

1224.50

CEUX

GENMAB A/S

11-Apr-2025

14:11:02 PM

36

1224.50

CEUX

GENMAB A/S

11-Apr-2025

14:11:24 PM

88

1224.00

XCSE

GENMAB A/S

11-Apr-2025

14:11:24 PM

24

1224.00

TQEX

GENMAB A/S

11-Apr-2025

14:11:24 PM

26

1224.00

AQEU

GENMAB A/S

11-Apr-2025

14:11:26 PM

3

1223.50

CEUX

GENMAB A/S

11-Apr-2025

14:11:28 PM

9

1223.50

CEUX

GENMAB A/S

11-Apr-2025

14:11:28 PM

10

1223.50

CEUX

GENMAB A/S

11-Apr-2025

14:11:28 PM

64

1223.50

CEUX

GENMAB A/S

11-Apr-2025

14:12:19 PM

81

1223.00

XCSE

GENMAB A/S

11-Apr-2025

14:12:20 PM

9

1222.50

CEUX

GENMAB A/S

11-Apr-2025

14:12:20 PM

77

1222.50

CEUX

GENMAB A/S

11-Apr-2025

14:15:41 PM

45

1223.00

XCSE

GENMAB A/S

11-Apr-2025

14:15:41 PM

24

1223.00

TQEX

GENMAB A/S

11-Apr-2025

14:15:41 PM

35

1223.00

CEUX

GENMAB A/S

11-Apr-2025

14:15:41 PM

38

1223.00

CEUX

GENMAB A/S

11-Apr-2025

14:15:57 PM

57

1222.50

XCSE

GENMAB A/S

11-Apr-2025

14:15:57 PM

25

1222.50

XCSE

GENMAB A/S

11-Apr-2025

14:16:18 PM

4

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:16:18 PM

25

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:16:18 PM

11

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:16:57 PM

82

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:18:41 PM

85

1222.00

XCSE

94


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

14:18:41 PM

34

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:18:41 PM

44

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:18:42 PM

17

1221.50

TQEX

GENMAB A/S

11-Apr-2025

14:18:49 PM

7

1221.50

TQEX

GENMAB A/S

11-Apr-2025

14:19:24 PM

84

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:19:24 PM

88

1221.00

CEUX

GENMAB A/S

11-Apr-2025

14:19:50 PM

85

1220.00

XCSE

GENMAB A/S

11-Apr-2025

14:19:50 PM

15

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:19:50 PM

71

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:21:10 PM

2

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:22:07 PM

25

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:23:15 PM

49

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:23:15 PM

34

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:23:15 PM

24

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:25:03 PM

10

1221.00

CEUX

GENMAB A/S

11-Apr-2025

14:25:15 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:25:32 PM

38

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:25:32 PM

43

1221.00

CEUX

GENMAB A/S

11-Apr-2025

14:25:48 PM

14

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:25:48 PM

10

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:25:56 PM

59

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:28:13 PM

41

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:28:13 PM

40

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:28:13 PM

30

1221.50

XCSE

GENMAB A/S

11-Apr-2025

14:28:13 PM

13

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:28:13 PM

24

1221.00

TQEX

GENMAB A/S

11-Apr-2025

14:28:13 PM

37

1221.00

AQEU

GENMAB A/S

11-Apr-2025

14:28:13 PM

52

1221.00

CEUX

GENMAB A/S

11-Apr-2025

14:29:41 PM

74

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:29:41 PM

21

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:29:41 PM

28

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:29:44 PM

3

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:29:44 PM

60

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:29:44 PM

19

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:29:44 PM

11

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:29:44 PM

12

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:29:44 PM

19

1219.50

AQEU

GENMAB A/S

11-Apr-2025

14:29:44 PM

7

1219.50

AQEU

GENMAB A/S

11-Apr-2025

14:31:30 PM

1

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:31:36 PM

47

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:31:36 PM

29

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:31:52 PM

49

1219.00

CEUX

GENMAB A/S

11-Apr-2025

14:32:01 PM

87

1218.50

XCSE

95


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

14:32:04 PM

11

1218.00

AQEU

GENMAB A/S

11-Apr-2025

14:34:52 PM

22

1219.50

CEUX

GENMAB A/S

11-Apr-2025

14:35:29 PM

85

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:35:29 PM

24

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:35:29 PM

63

1219.50

CEUX

GENMAB A/S

11-Apr-2025

14:35:49 PM

45

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:37:49 PM

36

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:37:49 PM

35

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:37:49 PM

38

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:37:57 PM

17

1219.00

TQEX

GENMAB A/S

11-Apr-2025

14:38:01 PM

7

1219.00

TQEX

GENMAB A/S

11-Apr-2025

14:38:36 PM

45

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:38:36 PM

15

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:38:36 PM

15

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:39:46 PM

12

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:39:46 PM

23

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:39:46 PM

14

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:39:46 PM

13

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:40:03 PM

88

1218.50

XCSE

GENMAB A/S

11-Apr-2025

14:40:03 PM

3

1218.00

AQEU

GENMAB A/S

11-Apr-2025

14:40:03 PM

88

1218.50

CEUX

GENMAB A/S

11-Apr-2025

14:40:06 PM

1

1218.00

AQEU

GENMAB A/S

11-Apr-2025

14:41:19 PM

56

1219.00

CEUX

GENMAB A/S

11-Apr-2025

14:41:20 PM

25

1219.00

CEUX

GENMAB A/S

11-Apr-2025

14:44:29 PM

38

1219.00

XCSE

GENMAB A/S

11-Apr-2025

14:44:29 PM

35

1219.00

XCSE

GENMAB A/S

11-Apr-2025

14:44:29 PM

13

1219.00

XCSE

GENMAB A/S

11-Apr-2025

14:44:45 PM

38

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:46:52 PM

7

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:46:52 PM

21

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:46:52 PM

53

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:46:52 PM

28

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:46:52 PM

48

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:11 PM

14

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:11 PM

13

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:12 PM

12

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:12 PM

12

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

12

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

56

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

18

1220.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

12

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

74

1221.00

XCSE

GENMAB A/S

11-Apr-2025

14:48:15 PM

25

1221.00

XCSE

96


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

14:48:15 PM

10

1220.50

CEUX

GENMAB A/S

11-Apr-2025

14:48:34 PM

10

1220.50

CEUX

GENMAB A/S

11-Apr-2025

14:48:34 PM

5

1220.50

CEUX

GENMAB A/S

11-Apr-2025

14:48:44 PM

10

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:44 PM

77

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:48:44 PM

12

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:48:44 PM

5

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:48:44 PM

7

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:48:44 PM

5

1219.50

TQEX

GENMAB A/S

11-Apr-2025

14:48:44 PM

25

1220.00

AQEU

GENMAB A/S

11-Apr-2025

14:48:44 PM

62

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:48:44 PM

20

1220.00

CEUX

GENMAB A/S

11-Apr-2025

14:50:07 PM

29

1219.00

AQEU

GENMAB A/S

11-Apr-2025

14:50:35 PM

5

1218.50

TQEX

GENMAB A/S

11-Apr-2025

14:50:35 PM

19

1218.50

TQEX

GENMAB A/S

11-Apr-2025

14:50:35 PM

83

1218.50

CEUX

GENMAB A/S

11-Apr-2025

14:50:38 PM

72

1218.00

XCSE

GENMAB A/S

11-Apr-2025

14:50:38 PM

9

1218.00

XCSE

GENMAB A/S

11-Apr-2025

14:52:05 PM

81

1219.50

XCSE

GENMAB A/S

11-Apr-2025

14:53:37 PM

81

1219.00

XCSE

GENMAB A/S

11-Apr-2025

14:53:37 PM

36

1219.50

CEUX

GENMAB A/S

11-Apr-2025

14:54:34 PM

12

1219.50

CEUX

GENMAB A/S

11-Apr-2025

14:56:09 PM

8

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:56:09 PM

6

1222.00

CEUX

GENMAB A/S

11-Apr-2025

14:56:10 PM

8

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:00:18 PM

22

1222.50

TQEX

GENMAB A/S

11-Apr-2025

15:00:44 PM

86

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:00:44 PM

27

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:00:44 PM

37

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:00:44 PM

47

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:00:44 PM

22

1222.50

TQEX

GENMAB A/S

11-Apr-2025

15:00:44 PM

24

1222.50

AQEU

GENMAB A/S

11-Apr-2025

15:00:44 PM

81

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:00:44 PM

3

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:00:44 PM

20

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:01:36 PM

7

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:01:36 PM

8

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:01:36 PM

8

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:01:56 PM

68

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:01:56 PM

12

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:01:56 PM

14

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:01:56 PM

27

1223.50

TQEX

GENMAB A/S

11-Apr-2025

15:01:56 PM

36

1224.50

CEUX

97


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:01:56 PM

11

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:01:56 PM

75

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:01:57 PM

5

1223.50

TQEX

GENMAB A/S

11-Apr-2025

15:02:11 PM

82

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

45

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

29

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

37

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

14

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

74

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

23

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

87

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:11 PM

32

1222.50

TQEX

GENMAB A/S

11-Apr-2025

15:02:11 PM

87

1223.00

CEUX

GENMAB A/S

11-Apr-2025

15:02:56 PM

3

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:02:57 PM

4

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:02:57 PM

3

1221.50

TQEX

GENMAB A/S

11-Apr-2025

15:03:55 PM

9

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:04:39 PM

85

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:04:39 PM

111

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:04:39 PM

84

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:04:39 PM

21

1221.50

TQEX

GENMAB A/S

11-Apr-2025

15:04:39 PM

111

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:04:39 PM

35

1221.50

CEUX

GENMAB A/S

11-Apr-2025

15:04:39 PM

50

1221.50

CEUX

GENMAB A/S

11-Apr-2025

15:04:48 PM

85

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:04:48 PM

85

1220.00

CEUX

GENMAB A/S

11-Apr-2025

15:04:49 PM

82

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:04:49 PM

30

1219.50

AQEU

GENMAB A/S

11-Apr-2025

15:05:05 PM

82

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:05:05 PM

46

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:05:05 PM

11

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:05:05 PM

2

1220.50

TQEX

GENMAB A/S

11-Apr-2025

15:05:05 PM

84

1220.00

CEUX

GENMAB A/S

11-Apr-2025

15:05:08 PM

15

1220.50

TQEX

GENMAB A/S

11-Apr-2025

15:05:31 PM

2

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:06:23 PM

23

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:06:23 PM

46

1220.00

CEUX

GENMAB A/S

11-Apr-2025

15:08:04 PM

82

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:08:04 PM

64

1218.00

XCSE

GENMAB A/S

11-Apr-2025

15:08:04 PM

85

1219.00

CEUX

GENMAB A/S

11-Apr-2025

15:08:18 PM

85

1218.00

CEUX

GENMAB A/S

11-Apr-2025

15:08:19 PM

16

1217.50

TQEX

GENMAB A/S

11-Apr-2025

15:09:40 PM

56

1218.50

XCSE

98


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:09:40 PM

28

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:09:40 PM

71

1218.50

CEUX

GENMAB A/S

11-Apr-2025

15:13:08 PM

24

1219.00

TQEX

GENMAB A/S

11-Apr-2025

15:13:09 PM

3

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:13:09 PM

25

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:13:09 PM

42

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:13:26 PM

5

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:13:26 PM

17

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:13:26 PM

61

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:16:20 PM

25

1219.00

TQEX

GENMAB A/S

11-Apr-2025

15:18:03 PM

81

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

30

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

52

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

12

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

13

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

4

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

8

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

47

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

14

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

30

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

12

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

85

1217.50

XCSE

GENMAB A/S

11-Apr-2025

15:18:03 PM

24

1218.00

TQEX

GENMAB A/S

11-Apr-2025

15:18:03 PM

37

1218.50

CEUX

GENMAB A/S

11-Apr-2025

15:18:03 PM

61

1217.50

CEUX

GENMAB A/S

11-Apr-2025

15:18:06 PM

24

1217.00

TQEX

GENMAB A/S

11-Apr-2025

15:22:15 PM

13

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:22:15 PM

10

1218.50

XCSE

GENMAB A/S

11-Apr-2025

15:22:15 PM

5

1218.50

CEUX

GENMAB A/S

11-Apr-2025

15:22:35 PM

14

1218.00

XCSE

GENMAB A/S

11-Apr-2025

15:22:35 PM

14

1218.00

XCSE

GENMAB A/S

11-Apr-2025

15:22:35 PM

43

1217.50

XCSE

GENMAB A/S

11-Apr-2025

15:22:35 PM

36

1218.00

CEUX

GENMAB A/S

11-Apr-2025

15:22:53 PM

46

1218.00

XCSE

GENMAB A/S

11-Apr-2025

15:22:53 PM

36

1218.00

CEUX

GENMAB A/S

11-Apr-2025

15:22:53 PM

1

1218.00

CEUX

GENMAB A/S

11-Apr-2025

15:22:54 PM

45

1217.50

XCSE

GENMAB A/S

11-Apr-2025

15:22:54 PM

25

1217.50

TQEX

GENMAB A/S

11-Apr-2025

15:22:54 PM

73

1217.50

CEUX

GENMAB A/S

11-Apr-2025

15:22:54 PM

8

1217.50

CEUX

GENMAB A/S

11-Apr-2025

15:23:01 PM

38

1217.50

XCSE

GENMAB A/S

11-Apr-2025

15:23:01 PM

19

1217.50

XCSE

GENMAB A/S

11-Apr-2025

15:25:34 PM

36

1218.50

CEUX

99


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:25:48 PM

12

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:25:48 PM

5

1219.00

CEUX

GENMAB A/S

11-Apr-2025

15:25:56 PM

13

1219.00

XCSE

GENMAB A/S

11-Apr-2025

15:26:47 PM

14

1219.50

XCSE

GENMAB A/S

11-Apr-2025

15:29:14 PM

38

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:14 PM

13

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:14 PM

14

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:14 PM

14

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:14 PM

13

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:15 PM

13

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:29:15 PM

9

1220.00

XCSE

GENMAB A/S

11-Apr-2025

15:30:07 PM

14

1220.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

8

1220.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

8

1220.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

6

1220.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

2

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

8

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

26

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:30:07 PM

7

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:30:08 PM

20

1220.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:54 PM

11

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:30:58 PM

13

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:30:59 PM

22

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:32:57 PM

87

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:32:57 PM

111

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:32:57 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:32:57 PM

31

1223.50

TQEX

GENMAB A/S

11-Apr-2025

15:32:57 PM

26

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:32:57 PM

68

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:32:57 PM

15

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:33:00 PM

48

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:35:02 PM

88

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

30

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

32

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

23

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:02 PM

28

1225.00

TQEX

GENMAB A/S

11-Apr-2025

15:35:02 PM

33

1224.50

AQEU

GENMAB A/S

11-Apr-2025

15:35:02 PM

81

1224.50

CEUX

GENMAB A/S

11-Apr-2025

15:35:03 PM

29

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:03 PM

3

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:03 PM

30

1225.00

XCSE

100


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:35:03 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:03 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:03 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:03 PM

10

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:08 PM

10

1225.00

CEUX

GENMAB A/S

11-Apr-2025

15:35:08 PM

10

1225.00

CEUX

GENMAB A/S

11-Apr-2025

15:35:09 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:09 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:09 PM

40

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:09 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:10 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:16 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

15:35:17 PM

14

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:35:17 PM

82

1224.50

CEUX

GENMAB A/S

11-Apr-2025

15:35:56 PM

86

1224.50

XCSE

GENMAB A/S

11-Apr-2025

15:35:56 PM

32

1224.50

TQEX

GENMAB A/S

11-Apr-2025

15:35:59 PM

72

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:35:59 PM

14

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:35:59 PM

24

1223.50

TQEX

GENMAB A/S

11-Apr-2025

15:35:59 PM

87

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:36:01 PM

27

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:36:07 PM

9

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:07 PM

18

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:08 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

15

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

13

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

30

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:36:14 PM

46

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:37:44 PM

68

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:37:44 PM

23

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:37:44 PM

16

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:37:58 PM

19

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:37:59 PM

11

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:37:59 PM

14

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:37:59 PM

25

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:37:59 PM

13

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:37:59 PM

13

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:37:59 PM

14

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

26

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

8

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

14

1223.50

XCSE

101


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:38:06 PM

14

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

14

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

35

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:38:06 PM

3

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:38:44 PM

18

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:38:58 PM

27

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:38:58 PM

50

1223.00

CEUX

GENMAB A/S

11-Apr-2025

15:38:58 PM

60

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:38:58 PM

23

1223.50

CEUX

GENMAB A/S

11-Apr-2025

15:38:59 PM

5

1223.50

AQEU

GENMAB A/S

11-Apr-2025

15:39:56 PM

19

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:39:56 PM

28

1223.00

TQEX

GENMAB A/S

11-Apr-2025

15:41:20 PM

67

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:41:20 PM

3

1222.50

AQEU

GENMAB A/S

11-Apr-2025

15:41:20 PM

19

1222.50

AQEU

GENMAB A/S

11-Apr-2025

15:41:20 PM

3

1222.50

AQEU

GENMAB A/S

11-Apr-2025

15:41:20 PM

11

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:41:20 PM

77

1222.50

CEUX

GENMAB A/S

11-Apr-2025

15:41:38 PM

86

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

26

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

14

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

14

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

88

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:44:00 PM

24

1221.50

TQEX

GENMAB A/S

11-Apr-2025

15:44:00 PM

85

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:44:28 PM

5

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:44:28 PM

28

1221.50

AQEU

GENMAB A/S

11-Apr-2025

15:45:31 PM

32

1221.50

CEUX

GENMAB A/S

11-Apr-2025

15:45:32 PM

15

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:33 PM

28

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:33 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:33 PM

38

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:34 PM

9

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:34 PM

17

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:45:35 PM

28

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:35 PM

14

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:35 PM

13

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:35 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:35 PM

13

1221.50

XCSE

102


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:45:35 PM

31

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:45:46 PM

17

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:45:55 PM

47

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:46:45 PM

46

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:46:45 PM

14

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:46:45 PM

24

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:46:45 PM

70

1220.50

XCSE

GENMAB A/S

11-Apr-2025

15:46:45 PM

17

1220.50

XCSE

GENMAB A/S

11-Apr-2025

15:47:06 PM

26

1222.00

TQEX

GENMAB A/S

11-Apr-2025

15:47:06 PM

83

1222.00

CEUX

GENMAB A/S

11-Apr-2025

15:47:41 PM

86

1221.50

XCSE

GENMAB A/S

11-Apr-2025

15:47:41 PM

15

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:47:41 PM

14

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:47:41 PM

3

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:48:02 PM

27

1221.00

AQEU

GENMAB A/S

11-Apr-2025

15:48:02 PM

82

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:48:07 PM

79

1220.50

XCSE

GENMAB A/S

11-Apr-2025

15:48:07 PM

9

1220.50

XCSE

GENMAB A/S

11-Apr-2025

15:50:01 PM

88

1221.00

XCSE

GENMAB A/S

11-Apr-2025

15:50:01 PM

85

1221.00

CEUX

GENMAB A/S

11-Apr-2025

15:51:30 PM

52

1222.00

XCSE

GENMAB A/S

11-Apr-2025

15:51:30 PM

53

1221.50

CEUX

GENMAB A/S

11-Apr-2025

15:51:30 PM

33

1221.50

CEUX

GENMAB A/S

11-Apr-2025

15:51:41 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:52:05 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:52:05 PM

5

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:52:05 PM

24

1224.00

TQEX

GENMAB A/S

11-Apr-2025

15:52:05 PM

85

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:53:48 PM

18

1224.00

AQEU

GENMAB A/S

11-Apr-2025

15:53:49 PM

2

1224.00

AQEU

GENMAB A/S

11-Apr-2025

15:54:05 PM

7

1224.00

AQEU

GENMAB A/S

11-Apr-2025

15:54:23 PM

11

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:55:21 PM

24

1224.00

TQEX

GENMAB A/S

11-Apr-2025

15:55:21 PM

30

1224.00

AQEU

GENMAB A/S

11-Apr-2025

15:55:21 PM

86

1224.00

CEUX

GENMAB A/S

11-Apr-2025

15:56:00 PM

30

1224.00

XCSE

GENMAB A/S

11-Apr-2025

15:56:11 PM

86

1223.50

XCSE

GENMAB A/S

11-Apr-2025

15:56:11 PM

30

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:56:11 PM

30

1223.00

XCSE

GENMAB A/S

11-Apr-2025

15:56:11 PM

25

1223.00

TQEX

GENMAB A/S

11-Apr-2025

15:56:11 PM

24

1223.00

AQEU

GENMAB A/S

11-Apr-2025

15:56:11 PM

85

1223.00

CEUX

GENMAB A/S

11-Apr-2025

15:56:12 PM

46

1223.00

XCSE

103


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

15:56:12 PM

88

1222.50

XCSE

GENMAB A/S

11-Apr-2025

15:59:25 PM

13

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:00:16 PM

86

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:00:16 PM

10

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:00:16 PM

11

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:00:16 PM

33

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:01:41 PM

39

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:41 PM

20

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:01:41 PM

36

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:01:42 PM

17

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:42 PM

35

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:42 PM

39

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:42 PM

15

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:56 PM

31

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:56 PM

14

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:01:56 PM

82

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:01:56 PM

32

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:01:58 PM

10

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:02:20 PM

21

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:02:21 PM

37

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:02:21 PM

30

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:02:21 PM

24

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:02:21 PM

1

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:02:21 PM

82

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:04:34 PM

5

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:04:34 PM

22

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:04:34 PM

5

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:04:39 PM

88

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:04:39 PM

34

1225.00

TQEX

GENMAB A/S

11-Apr-2025

16:04:39 PM

34

1225.00

AQEU

GENMAB A/S

11-Apr-2025

16:04:39 PM

82

1224.50

CEUX

GENMAB A/S

11-Apr-2025

16:04:40 PM

15

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:05:12 PM

24

1224.00

TQEX

GENMAB A/S

11-Apr-2025

16:05:24 PM

15

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:03 PM

30

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:50 PM

45

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:50 PM

39

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:50 PM

27

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:54 PM

7

1224.00

AQEU

GENMAB A/S

11-Apr-2025

16:07:57 PM

24

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:57 PM

83

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:57 PM

20

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:07:57 PM

29

1224.50

TQEX

104


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:07:57 PM

84

1224.50

CEUX

GENMAB A/S

11-Apr-2025

16:08:24 PM

32

1224.50

CEUX

GENMAB A/S

11-Apr-2025

16:08:25 PM

47

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:34 PM

46

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:34 PM

22

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:41 PM

39

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:41 PM

21

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:41 PM

39

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:42 PM

46

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:42 PM

16

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:42 PM

15

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:08:42 PM

13

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

39

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

14

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

48

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

39

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

21

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:09:01 PM

22

1224.00

AQEU

GENMAB A/S

11-Apr-2025

16:09:01 PM

32

1224.00

CEUX

GENMAB A/S

11-Apr-2025

16:09:09 PM

83

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:09:09 PM

84

1223.50

CEUX

GENMAB A/S

11-Apr-2025

16:09:35 PM

84

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:09:35 PM

2

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:09:35 PM

8

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:09:35 PM

84

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:10:23 PM

43

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:10:23 PM

42

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:10:41 PM

25

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:10:41 PM

88

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:10:55 PM

24

1222.50

TQEX

GENMAB A/S

11-Apr-2025

16:12:16 PM

12

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:12:16 PM

13

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:12:16 PM

14

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:12:16 PM

39

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:12:16 PM

19

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:13:06 PM

82

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:13:06 PM

18

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:13:06 PM

86

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:13:13 PM

22

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:13:43 PM

2

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:13:53 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:14:39 PM

7

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:14:55 PM

82

1222.00

XCSE

105


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:14:55 PM

35

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:14:55 PM

30

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:14:55 PM

82

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:14:56 PM

86

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:14:56 PM

28

1221.00

TQEX

GENMAB A/S

11-Apr-2025

16:14:56 PM

25

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:14:56 PM

87

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:16:32 PM

42

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:16:32 PM

15

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:16:32 PM

39

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:16:32 PM

13

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:16:32 PM

2

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:16:32 PM

83

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:16:33 PM

26

1220.50

AQEU

GENMAB A/S

11-Apr-2025

16:17:44 PM

83

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

60

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

14

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

30

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

7

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

86

1219.50

XCSE

GENMAB A/S

11-Apr-2025

16:17:44 PM

27

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:17:44 PM

86

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:18:52 PM

83

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:18:52 PM

80

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:18:53 PM

53

1220.00

XCSE

GENMAB A/S

11-Apr-2025

16:18:53 PM

35

1220.00

XCSE

GENMAB A/S

11-Apr-2025

16:18:56 PM

26

1220.50

AQEU

GENMAB A/S

11-Apr-2025

16:19:41 PM

81

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:20:19 PM

68

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:20:19 PM

20

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:20:21 PM

81

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:20:23 PM

17

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:20:23 PM

70

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:20:24 PM

7

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:20:24 PM

18

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:20:24 PM

61

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:07 PM

84

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:22:26 PM

30

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:26 PM

14

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:36 PM

13

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:36 PM

38

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:36 PM

13

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:22:36 PM

14

1221.00

XCSE

106


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:23:25 PM

75

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:23:25 PM

14

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:23:25 PM

16

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:25:00 PM

36

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:00 PM

5

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:02 PM

33

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:24 PM

12

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:24 PM

18

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:24 PM

2

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:25:55 PM

39

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:25:55 PM

14

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:25:55 PM

18

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:25:55 PM

32

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:26:46 PM

14

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:46 PM

12

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:46 PM

12

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:46 PM

49

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:46 PM

12

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:46 PM

14

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:46 PM

5

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:46 PM

37

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:46 PM

8

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:47 PM

9

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:47 PM

12

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:26:59 PM

45

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:26:59 PM

18

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:27:50 PM

3

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:50 PM

2

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:50 PM

8

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:50 PM

18

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:52 PM

39

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:54 PM

3

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:27:54 PM

36

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:27:54 PM

17

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:27:54 PM

6

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:28:11 PM

86

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:28:11 PM

3

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:28:11 PM

8

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:28:11 PM

36

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:28:13 PM

29

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:28:13 PM

36

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:28:13 PM

75

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:28:36 PM

3

1222.00

TQEX

107


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:28:36 PM

81

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:28:38 PM

31

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:28:46 PM

46

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:28:46 PM

13

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:28:48 PM

100

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:00 PM

13

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:00 PM

26

1224.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:00 PM

31

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:00 PM

7

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:00 PM

82

1224.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:01 PM

70

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:01 PM

25

1223.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:01 PM

2

1223.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:01 PM

10

1223.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:01 PM

2

1223.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:01 PM

70

1224.00

AQEU

GENMAB A/S

11-Apr-2025

16:30:01 PM

15

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:01 PM

2

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:01 PM

10

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:01 PM

8

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:01 PM

51

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:02 PM

84

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

2

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

3

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

46

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

2

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

3

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

8

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:02 PM

1

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:02 PM

7

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:02 PM

10

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:02 PM

3

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:02 PM

9

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:30:02 PM

45

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:30:02 PM

9

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:30:03 PM

15

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:04 PM

21

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:04 PM

49

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:04 PM

18

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:05 PM

10

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:05 PM

17

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:05 PM

12

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:05 PM

11

1224.00

XCSE

108


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:30:05 PM

69

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:05 PM

21

1224.00

AQEU

GENMAB A/S

11-Apr-2025

16:30:05 PM

23

1224.00

AQEU

GENMAB A/S

11-Apr-2025

16:30:06 PM

47

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:06 PM

21

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

8

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

19

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

30

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

8

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

19

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:12 PM

8

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

10

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

2

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:13 PM

7

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:28 PM

6

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:28 PM

6

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:28 PM

10

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:28 PM

3

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

30

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:35 PM

49

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:35 PM

32

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:35 PM

10

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:30:35 PM

2

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

4

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

2

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

2

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

2

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:35 PM

8

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:41 PM

84

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

49

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

30

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

3

1223.00

XCSE

109


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:30:41 PM

4

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

9

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

4

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

2

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:41 PM

24

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:30:41 PM

41

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:30:54 PM

13

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:54 PM

49

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:54 PM

14

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:54 PM

30

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:30:55 PM

81

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:02 PM

33

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:02 PM

12

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:02 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:03 PM

36

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:03 PM

43

1223.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:04 PM

3

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:04 PM

2

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:04 PM

83

1223.00

CEUX

GENMAB A/S

11-Apr-2025

16:31:09 PM

87

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:09 PM

24

1222.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:11 PM

84

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:31:21 PM

30

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:21 PM

58

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:21 PM

7

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:21 PM

1

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:21 PM

1

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:21 PM

48

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:31:37 PM

15

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:31:38 PM

14

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:31:38 PM

6

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:31:42 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:43 PM

4

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:43 PM

3

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:43 PM

2

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:43 PM

2

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:47 PM

87

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:47 PM

2

1221.50

TQEX

110


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:31:47 PM

2

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:47 PM

4

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:47 PM

31

1222.00

AQEU

GENMAB A/S

11-Apr-2025

16:31:55 PM

35

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

23

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

26

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

3

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

11

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

2

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

5

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

2

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

32

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

11

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

45

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:31:55 PM

12

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:55 PM

3

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:55 PM

5

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:55 PM

15

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:55 PM

2

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:31:55 PM

17

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:31:55 PM

86

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:31:55 PM

20

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:31:55 PM

38

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:31:55 PM

7

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:31:55 PM

18

1220.50

CEUX

GENMAB A/S

11-Apr-2025

16:32:22 PM

16

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:32:22 PM

25

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:32:22 PM

25

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:32:22 PM

5

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:32:22 PM

13

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:32:26 PM

15

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:26 PM

14

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:26 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:27 PM

13

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:27 PM

49

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:27 PM

12

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:32:30 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:30 PM

3

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:30 PM

5

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:32:30 PM

9

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:32:30 PM

5

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:32:30 PM

2

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:32:30 PM

3

1222.00

TQEX

111


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:32:32 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

4

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

6

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

3

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

3

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:32 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:37 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:37 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:37 PM

48

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:32:37 PM

1

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:32:50 PM

3

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:32:50 PM

7

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

36

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

30

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

15

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

7

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

13

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

7

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

8

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

23

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:15 PM

4

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

2

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

4

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

3

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

4

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

2

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:15 PM

4

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

7

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

8

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

35

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

4

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:33:15 PM

5

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:33:23 PM

7

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:33:23 PM

36

1221.50

AQEU

GENMAB A/S

11-Apr-2025

16:33:23 PM

66

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:33:24 PM

21

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:33:24 PM

30

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:33:24 PM

77

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:33:25 PM

9

1221.00

XCSE

112


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:33:48 PM

14

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

43

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

5

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

49

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

12

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

2

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:14 PM

32

1221.50

TQEX

GENMAB A/S

11-Apr-2025

16:34:14 PM

86

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:34:14 PM

36

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:34:14 PM

20

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:34:14 PM

36

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:34:14 PM

7

1222.00

CEUX

GENMAB A/S

11-Apr-2025

16:34:15 PM

49

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:34:16 PM

88

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:17 PM

15

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:17 PM

10

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:17 PM

7

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:21 PM

27

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:24 PM

15

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:34:37 PM

13

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:34:37 PM

7

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:34:37 PM

32

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:34:48 PM

15

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:34:51 PM

8

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:34:53 PM

10

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:12 PM

13

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:35:15 PM

84

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:15 PM

14

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:15 PM

14

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:15 PM

12

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:15 PM

34

1225.50

TQEX

GENMAB A/S

11-Apr-2025

16:35:15 PM

2

1226.00

AQEU

GENMAB A/S

11-Apr-2025

16:35:15 PM

22

1226.00

AQEU

GENMAB A/S

11-Apr-2025

16:35:15 PM

68

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:15 PM

14

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:16 PM

14

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

49

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

14

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

13

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

21

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

29

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

12

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

49

1226.00

XCSE

113


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:35:16 PM

13

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

8

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

82

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:16 PM

32

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:35:20 PM

30

1225.50

TQEX

GENMAB A/S

11-Apr-2025

16:35:26 PM

46

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:26 PM

49

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:26 PM

12

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:26 PM

4

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:34 PM

6

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:34 PM

10

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:34 PM

26

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:34 PM

5

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:39 PM

82

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:35:51 PM

86

1224.50

CEUX

GENMAB A/S

11-Apr-2025

16:35:52 PM

82

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:35:52 PM

27

1223.50

TQEX

GENMAB A/S

11-Apr-2025

16:35:52 PM

81

1223.50

CEUX

GENMAB A/S

11-Apr-2025

16:36:16 PM

6

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:36:16 PM

29

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:36:16 PM

29

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:36:25 PM

19

1224.50

XCSE

GENMAB A/S

11-Apr-2025

16:36:25 PM

87

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:36:31 PM

85

1223.50

CEUX

GENMAB A/S

11-Apr-2025

16:36:35 PM

24

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:37:48 PM

86

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

5

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

15

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

12

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

10

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

49

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

10

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

10

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:37:48 PM

3

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:37:48 PM

2

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:37:48 PM

35

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:37:48 PM

5

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:37:48 PM

5

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:37:48 PM

37

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:37:54 PM

20

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:37:54 PM

6

1222.00

TQEX

GENMAB A/S

11-Apr-2025

16:38:01 PM

85

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

3

1221.00

XCSE

114


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:38:01 PM

15

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

5

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

14

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

6

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

36

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

28

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:01 PM

15

1221.00

TQEX

GENMAB A/S

11-Apr-2025

16:38:01 PM

13

1221.00

TQEX

GENMAB A/S

11-Apr-2025

16:38:01 PM

13

1221.00

AQEU

GENMAB A/S

11-Apr-2025

16:38:01 PM

12

1221.00

AQEU

GENMAB A/S

11-Apr-2025

16:38:01 PM

82

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:38:10 PM

84

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:38:26 PM

67

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:26 PM

49

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:38:26 PM

15

1222.00

XCSE

GENMAB A/S

11-Apr-2025

16:38:26 PM

20

1221.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:52 PM

53

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:38:52 PM

34

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:39:31 PM

21

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:39:31 PM

24

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:39:31 PM

32

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

84

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

60

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

15

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

13

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

23

1226.50

XCSE

GENMAB A/S

11-Apr-2025

16:40:01 PM

28

1226.00

AQEU

GENMAB A/S

11-Apr-2025

16:40:01 PM

30

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:40:01 PM

51

1226.00

CEUX

GENMAB A/S

11-Apr-2025

16:40:03 PM

88

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:03 PM

88

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:40:04 PM

24

1224.50

TQEX

GENMAB A/S

11-Apr-2025

16:40:05 PM

5

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:48 PM

29

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:48 PM

50

1224.00

XCSE

GENMAB A/S

11-Apr-2025

16:40:48 PM

4

1223.50

AQEU

GENMAB A/S

11-Apr-2025

16:40:48 PM

81

1224.00

CEUX

GENMAB A/S

11-Apr-2025

16:40:51 PM

21

1223.50

AQEU

GENMAB A/S

11-Apr-2025

16:40:54 PM

3

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:40:54 PM

80

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:40:54 PM

24

1223.50

TQEX

GENMAB A/S

11-Apr-2025

16:40:54 PM

26

1223.50

CEUX

GENMAB A/S

11-Apr-2025

16:40:54 PM

15

1223.50

CEUX

115


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:40:54 PM

40

1223.50

CEUX

GENMAB A/S

11-Apr-2025

16:41:03 PM

27

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:03 PM

35

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:03 PM

23

1223.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:11 PM

1

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:41:11 PM

23

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:41:11 PM

2

1223.00

AQEU

GENMAB A/S

11-Apr-2025

16:41:36 PM

47

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:41:36 PM

18

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:41:36 PM

5

1223.00

XCSE

GENMAB A/S

11-Apr-2025

16:41:37 PM

34

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:54 PM

2

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:57 PM

49

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:41:57 PM

56

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:41:57 PM

32

1222.50

CEUX

GENMAB A/S

11-Apr-2025

16:42:14 PM

24

1221.00

TQEX

GENMAB A/S

11-Apr-2025

16:42:14 PM

83

1221.00

CEUX

GENMAB A/S

11-Apr-2025

16:42:15 PM

87

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:42:15 PM

10

1220.50

XCSE

GENMAB A/S

11-Apr-2025

16:42:15 PM

30

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:42:15 PM

4

1221.00

XCSE

GENMAB A/S

11-Apr-2025

16:42:15 PM

10

1220.50

TQEX

GENMAB A/S

11-Apr-2025

16:42:27 PM

84

1221.50

CEUX

GENMAB A/S

11-Apr-2025

16:42:44 PM

10

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:42:50 PM

1

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:42:50 PM

6

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:42:50 PM

25

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:42:50 PM

40

1222.50

XCSE

GENMAB A/S

11-Apr-2025

16:43:05 PM

11

1223.50

AQEU

GENMAB A/S

11-Apr-2025

16:43:45 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:45 PM

49

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:45 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:45 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:45 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

49

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

14

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

8

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:46 PM

18

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:59 PM

2

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:59 PM

49

1225.00

XCSE

116


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:43:59 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:59 PM

12

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:43:59 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:06 PM

10

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:06 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:06 PM

9

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:28 PM

2

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:44:28 PM

5

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:44:29 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:29 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:44:34 PM

6

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:44:34 PM

18

1225.00

CEUX

GENMAB A/S

11-Apr-2025

16:44:38 PM

19

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:44:42 PM

62

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:44:58 PM

13

1225.50

XCSE

GENMAB A/S

11-Apr-2025

16:44:58 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

16:44:58 PM

14

1225.50

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

1

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

12

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

13

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

13

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

46

1225.50

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

14

1225.50

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

83

1225.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:00 PM

2

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:45:00 PM

83

1225.50

CEUX

GENMAB A/S

11-Apr-2025

16:45:26 PM

14

1226.00

XCSE

GENMAB A/S

11-Apr-2025

16:45:46 PM

13

1226.50

XCSE

GENMAB A/S

11-Apr-2025

16:45:47 PM

75

1226.50

XCSE

GENMAB A/S

11-Apr-2025

16:45:49 PM

10

1226.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:07 PM

84

1227.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

30

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

14

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

49

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

13

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

5

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

85

1227.50

XCSE

GENMAB A/S

11-Apr-2025

16:46:40 PM

24

1228.00

AQEU

GENMAB A/S

11-Apr-2025

16:46:40 PM

85

1228.00

CEUX

GENMAB A/S

11-Apr-2025

16:46:40 PM

36

1228.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:06 PM

9

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:47:21 PM

4

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:47:39 PM

20

1230.50

AQEU

117


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:47:39 PM

24

1230.50

AQEU

GENMAB A/S

11-Apr-2025

16:47:39 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

84

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:47:58 PM

10

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

22

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

3

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

7

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

3

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

13

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:47:58 PM

24

1230.50

AQEU

GENMAB A/S

11-Apr-2025

16:47:58 PM

13

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

4

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

9

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

11

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:47:58 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:48:02 PM

24

1230.50

TQEX

GENMAB A/S

11-Apr-2025

16:48:05 PM

10

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:48:05 PM

20

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:48:11 PM

3

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:48:11 PM

75

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:48:31 PM

87

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

49

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

11

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

49

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:48:53 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:00 PM

31

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:00 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:00 PM

49

1231.00

XCSE

118


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:49:00 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:16 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:16 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:16 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:23 PM

81

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:37 PM

17

1231.50

CEUX

GENMAB A/S

11-Apr-2025

16:49:40 PM

36

1231.50

CEUX

GENMAB A/S

11-Apr-2025

16:49:41 PM

36

1231.50

CEUX

GENMAB A/S

11-Apr-2025

16:49:43 PM

36

1231.50

CEUX

GENMAB A/S

11-Apr-2025

16:49:46 PM

17

1231.50

XCSE

GENMAB A/S

11-Apr-2025

16:49:48 PM

20

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:48 PM

7

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:48 PM

36

1232.00

CEUX

GENMAB A/S

11-Apr-2025

16:49:52 PM

30

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:52 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:52 PM

13

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:52 PM

36

1232.00

CEUX

GENMAB A/S

11-Apr-2025

16:49:54 PM

4

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:54 PM

6

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:49:54 PM

19

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:49:54 PM

25

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:49:54 PM

3

1232.00

CEUX

GENMAB A/S

11-Apr-2025

16:49:54 PM

12

1232.00

CEUX

GENMAB A/S

11-Apr-2025

16:49:54 PM

86

1232.00

CEUX

GENMAB A/S

11-Apr-2025

16:49:55 PM

5

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:55 PM

2

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:49:59 PM

26

1231.50

AQEU

GENMAB A/S

11-Apr-2025

16:50:01 PM

1

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:01 PM

81

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:01 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:01 PM

24

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:01 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:01 PM

9

1231.00

TQEX

GENMAB A/S

11-Apr-2025

16:50:01 PM

37

1231.00

TQEX

GENMAB A/S

11-Apr-2025

16:50:01 PM

84

1231.00

CEUX

GENMAB A/S

11-Apr-2025

16:50:25 PM

25

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:25 PM

63

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:50:25 PM

37

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:50:25 PM

82

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:50:39 PM

17

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:39 PM

5

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:39 PM

49

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:39 PM

40

1229.50

XCSE

119


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:50:43 PM

14

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:44 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:44 PM

29

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:46 PM

3

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:46 PM

43

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:46 PM

4

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:46 PM

4

1228.50

TQEX

GENMAB A/S

11-Apr-2025

16:50:46 PM

5

1228.50

TQEX

GENMAB A/S

11-Apr-2025

16:50:46 PM

33

1229.00

AQEU

GENMAB A/S

11-Apr-2025

16:50:46 PM

8

1228.50

CEUX

GENMAB A/S

11-Apr-2025

16:50:49 PM

32

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:50:49 PM

74

1228.50

CEUX

GENMAB A/S

11-Apr-2025

16:50:54 PM

9

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:08 PM

14

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:14 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:14 PM

49

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:14 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:21 PM

1

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:51:21 PM

16

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

20

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

4

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

5

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

2

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

21

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

4

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:21 PM

10

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:36 PM

23

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:51:52 PM

12

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:51:52 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:51:52 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:51:52 PM

83

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:03 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:52:03 PM

12

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:52:03 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:52:04 PM

2

1229.50

AQEU

GENMAB A/S

11-Apr-2025

16:52:04 PM

24

1229.50

AQEU

GENMAB A/S

11-Apr-2025

16:52:05 PM

63

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:07 PM

1

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:38 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:52:48 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:52 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:52 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:52 PM

13

1230.50

XCSE

120


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:52:52 PM

8

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:52 PM

49

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:53 PM

9

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:53 PM

49

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:53 PM

17

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:56 PM

15

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:52:56 PM

88

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:52:58 PM

67

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:53:05 PM

2

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:05 PM

3

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:05 PM

5

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:10 PM

31

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:53:10 PM

26

1228.50

XCSE

GENMAB A/S

11-Apr-2025

16:53:10 PM

3

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:10 PM

2

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:10 PM

9

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:10 PM

61

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:53:20 PM

10

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:20 PM

10

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:53 PM

6

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:53:53 PM

79

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:53:53 PM

24

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:53:53 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:53:53 PM

6

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:53:53 PM

6

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:53:53 PM

6

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:54:06 PM

32

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:54:48 PM

30

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

40

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

1

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

6

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

40

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

16:54:48 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:54:48 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:54:48 PM

6

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:54:48 PM

39

1230.50

CEUX

GENMAB A/S

11-Apr-2025

16:55:04 PM

25

1230.00

AQEU

121


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:55:07 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:14 PM

83

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

47

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

50

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

4

1230.00

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

47

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

11

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

84

1229.00

XCSE

GENMAB A/S

11-Apr-2025

16:55:14 PM

28

1230.00

TQEX

GENMAB A/S

11-Apr-2025

16:55:14 PM

5

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:55:14 PM

84

1230.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:14 PM

10

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:14 PM

13

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:14 PM

13

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:19 PM

48

1229.00

CEUX

GENMAB A/S

11-Apr-2025

16:55:40 PM

87

1229.50

XCSE

GENMAB A/S

11-Apr-2025

16:55:40 PM

24

1229.00

TQEX

GENMAB A/S

11-Apr-2025

16:55:40 PM

58

1229.50

CEUX

GENMAB A/S

11-Apr-2025

16:55:40 PM

23

1229.50

CEUX

GENMAB A/S

11-Apr-2025

16:55:40 PM

27

1229.00

AQEU

GENMAB A/S

11-Apr-2025

16:57:12 PM

45

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

40

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

15

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

11

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

40

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

20

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:12 PM

4

1233.00

CEUX

GENMAB A/S

11-Apr-2025

16:57:15 PM

84

1233.00

XCSE

GENMAB A/S

11-Apr-2025

16:57:15 PM

2

1233.00

TQEX

GENMAB A/S

11-Apr-2025

16:57:32 PM

4

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:32 PM

81

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:32 PM

68

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:32 PM

4

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:32 PM

13

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:33 PM

2

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

2

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

3

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

22

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

3

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

2

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:33 PM

5

1233.00

TQEX

GENMAB A/S

11-Apr-2025

16:57:33 PM

15

1233.50

CEUX

122


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:57:33 PM

3

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:33 PM

2

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:33 PM

3

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:57:56 PM

2

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:57:56 PM

1

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:58:25 PM

1

1233.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:25 PM

5

1233.50

XCSE

GENMAB A/S

11-Apr-2025

16:58:25 PM

4

1233.00

TQEX

GENMAB A/S

11-Apr-2025

16:58:25 PM

3

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

37

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

13

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

30

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

30

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:27 PM

15

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

14

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

12

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

13

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

30

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

37

1234.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

86

1233.00

XCSE

GENMAB A/S

11-Apr-2025

16:58:28 PM

17

1233.00

TQEX

GENMAB A/S

11-Apr-2025

16:58:28 PM

3

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:58:28 PM

3

1233.00

AQEU

GENMAB A/S

11-Apr-2025

16:58:28 PM

5

1233.00

AQEU

GENMAB A/S

11-Apr-2025

16:58:29 PM

8

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:58:29 PM

7

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:58:29 PM

7

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:58:49 PM

19

1233.00

AQEU

GENMAB A/S

11-Apr-2025

16:59:00 PM

8

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:00 PM

8

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:00 PM

7

1233.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:00 PM

31

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:16 PM

6

1232.50

XCSE

GENMAB A/S

11-Apr-2025

16:59:16 PM

4

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

123


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

4

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

1

1232.00

TQEX

GENMAB A/S

11-Apr-2025

16:59:16 PM

51

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:16 PM

3

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:16 PM

4

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:16 PM

2

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:16 PM

2

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:32 PM

3

1232.50

XCSE

GENMAB A/S

11-Apr-2025

16:59:32 PM

3

1232.50

CEUX

GENMAB A/S

11-Apr-2025

16:59:47 PM

10

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:59:47 PM

30

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:59:47 PM

10

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:59:48 PM

38

1232.00

XCSE

GENMAB A/S

11-Apr-2025

16:59:56 PM

81

1231.50

XCSE

GENMAB A/S

11-Apr-2025

16:59:56 PM

81

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:00:00 PM

3

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:00 PM

25

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:00 PM

50

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:00 PM

24

1231.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:01 PM

8

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:03 PM

4

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:04 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:04 PM

2

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:04 PM

4

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:04 PM

2

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:04 PM

6

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:05 PM

9

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:00:16 PM

4

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:16 PM

13

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:16 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:19 PM

3

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:19 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:19 PM

12

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:22 PM

85

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:29 PM

4

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:30 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:31 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:49 PM

2

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:00:49 PM

21

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:00:49 PM

4

1231.00

XCSE

124


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:00:49 PM

5

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:51 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

41

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

15

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

15

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

50

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

7

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

24

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:00:51 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:51 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:51 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:51 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:51 PM

5

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:00:51 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:00:51 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:00:51 PM

5

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:10 PM

3

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:01:17 PM

2

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:01:38 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:01:38 PM

2

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:01:38 PM

5

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:01:38 PM

5

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:01:38 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:01:38 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:38 PM

2

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:42 PM

68

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:42 PM

1

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:42 PM

2

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:42 PM

1

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:42 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:01:48 PM

11

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:48 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:48 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:48 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:49 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:49 PM

20

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:49 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:01:49 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:02 PM

24

1230.00

TQEX

GENMAB A/S

11-Apr-2025

17:02:02 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:02:02 PM

20

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:02:02 PM

86

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:02:03 PM

47

1230.50

XCSE

125


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:02:03 PM

40

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:03 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:03 PM

11

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:03 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:03 PM

20

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:02:11 PM

40

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:11 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:11 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:02:11 PM

2

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:02:12 PM

2

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:02:41 PM

34

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:02:52 PM

3

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:02:52 PM

20

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:10 PM

1

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

84

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

25

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

21

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

30

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

35

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

5

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

37

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

21

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

82

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:10 PM

15

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:03:10 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:03:10 PM

5

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:10 PM

5

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:10 PM

71

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

5

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:03:13 PM

2

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:03:13 PM

4

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:03:13 PM

3

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:03:13 PM

7

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

8

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

8

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

4

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:13 PM

3

1230.00

AQEU

126


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:03:13 PM

9

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:03:25 PM

20

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:31 PM

84

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:31 PM

84

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:47 PM

36

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:58 PM

13

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:58 PM

12

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:58 PM

13

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:58 PM

21

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:03:58 PM

3

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:03:58 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:03:58 PM

5

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:04:07 PM

5

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

6

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

4

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

21

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

7

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

3

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:07 PM

15

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:04:07 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:04:07 PM

19

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:04:07 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:04:11 PM

5

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:11 PM

2

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:28 PM

47

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:28 PM

31

1232.50

CEUX

GENMAB A/S

11-Apr-2025

17:04:28 PM

2

1232.50

CEUX

GENMAB A/S

11-Apr-2025

17:04:41 PM

36

1232.50

CEUX

GENMAB A/S

11-Apr-2025

17:04:42 PM

7

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:42 PM

81

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:04:42 PM

27

1232.50

TQEX

GENMAB A/S

11-Apr-2025

17:04:42 PM

33

1232.50

AQEU

GENMAB A/S

11-Apr-2025

17:04:44 PM

36

1232.50

CEUX

GENMAB A/S

11-Apr-2025

17:04:44 PM

1

1232.50

AQEU

GENMAB A/S

11-Apr-2025

17:05:31 PM

30

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

30

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

40

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

3

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

15

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

11

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:37 PM

81

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:05:37 PM

36

1232.50

CEUX

127


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:05:37 PM

1

1232.50

AQEU

GENMAB A/S

11-Apr-2025

17:05:38 PM

30

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:38 PM

15

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:38 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:05:47 PM

4

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:06:10 PM

85

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:06:10 PM

82

1234.00

CEUX

GENMAB A/S

11-Apr-2025

17:07:00 PM

83

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:00 PM

12

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:00 PM

2

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:00 PM

32

1235.50

TQEX

GENMAB A/S

11-Apr-2025

17:07:00 PM

3

1235.50

TQEX

GENMAB A/S

11-Apr-2025

17:07:03 PM

41

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:07:03 PM

70

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:07:27 PM

86

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

12

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:54 PM

14

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:54 PM

14

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:54 PM

36

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

47

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

36

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

4

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

6

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:07:54 PM

8

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:07:57 PM

3

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:57 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:57 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

40

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

33

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

13

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

40

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

30

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:58 PM

3

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:59 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:59 PM

40

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:59 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:59 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:07:59 PM

86

1238.50

XCSE

128


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:07:59 PM

24

1238.50

TQEX

GENMAB A/S

11-Apr-2025

17:08:39 PM

2

1239.00

AQEU

GENMAB A/S

11-Apr-2025

17:08:42 PM

41

1239.00

AQEU

GENMAB A/S

11-Apr-2025

17:09:02 PM

44

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

44

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

2

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

15

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

25

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

25

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

15

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

5

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

20

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

4

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:02 PM

24

1238.50

TQEX

GENMAB A/S

11-Apr-2025

17:09:02 PM

36

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:09:02 PM

10

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:09:03 PM

78

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:09:13 PM

31

1238.00

TQEX

GENMAB A/S

11-Apr-2025

17:09:14 PM

16

1237.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

72

1237.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

40

1238.00

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

21

1238.00

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

12

1238.00

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

23

1238.00

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

15

1238.00

XCSE

GENMAB A/S

11-Apr-2025

17:09:14 PM

14

1237.50

AQEU

GENMAB A/S

11-Apr-2025

17:09:14 PM

24

1237.50

AQEU

GENMAB A/S

11-Apr-2025

17:09:15 PM

2

1237.50

CEUX

GENMAB A/S

11-Apr-2025

17:09:31 PM

85

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:09:37 PM

28

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:09:37 PM

3

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:09:46 PM

83

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:09:53 PM

5

1239.50

TQEX

GENMAB A/S

11-Apr-2025

17:09:53 PM

5

1239.50

TQEX

GENMAB A/S

11-Apr-2025

17:09:53 PM

6

1239.50

TQEX

GENMAB A/S

11-Apr-2025

17:09:53 PM

10

1239.50

TQEX

GENMAB A/S

11-Apr-2025

17:10:21 PM

5

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:21 PM

3

1239.50

CEUX

GENMAB A/S

11-Apr-2025

17:10:23 PM

85

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:24 PM

83

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:10:24 PM

8

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:10:24 PM

20

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:10:25 PM

21

1239.00

XCSE

129


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:10:25 PM

12

1239.00

XCSE

GENMAB A/S

11-Apr-2025

17:10:25 PM

41

1239.00

XCSE

GENMAB A/S

11-Apr-2025

17:10:46 PM

37

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:46 PM

40

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:46 PM

14

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:46 PM

14

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:10:46 PM

6

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

4

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

40

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

12

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:06 PM

31

1239.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:07 PM

52

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:07 PM

36

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:08 PM

17

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:08 PM

4

1239.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

31

1238.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:09 PM

36

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

15

1238.50

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

5

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

5

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

4

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:09 PM

71

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:22 PM

3

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:22 PM

3

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:22 PM

2

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:22 PM

3

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:24 PM

2

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:31 PM

3

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:31 PM

2

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:32 PM

64

1238.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:35 PM

82

1237.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:35 PM

4

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

4

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

7

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

2

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

5

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

2

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:35 PM

2

1237.50

TQEX

GENMAB A/S

11-Apr-2025

17:11:40 PM

10

1237.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:42 PM

73

1237.00

CEUX

GENMAB A/S

11-Apr-2025

17:11:43 PM

2

1236.50

XCSE

130


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:11:43 PM

2

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

2

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

4

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

4

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

3

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

5

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

2

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

7

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

5

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:43 PM

26

1237.00

AQEU

GENMAB A/S

11-Apr-2025

17:11:48 PM

48

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:11:48 PM

3

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:11:48 PM

2

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:11:48 PM

5

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:11:48 PM

2

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:01 PM

81

1236.50

XCSE

GENMAB A/S

11-Apr-2025

17:12:01 PM

8

1236.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:01 PM

14

1236.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:01 PM

3

1236.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:01 PM

57

1236.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:01 PM

24

1236.50

AQEU

GENMAB A/S

11-Apr-2025

17:12:26 PM

58

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:12:26 PM

5

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:26 PM

71

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:29 PM

2

1235.00

AQEU

GENMAB A/S

11-Apr-2025

17:12:30 PM

2

1235.00

AQEU

GENMAB A/S

11-Apr-2025

17:12:32 PM

20

1235.00

AQEU

GENMAB A/S

11-Apr-2025

17:12:35 PM

1

1235.00

AQEU

GENMAB A/S

11-Apr-2025

17:12:48 PM

19

1235.00

XCSE

GENMAB A/S

11-Apr-2025

17:12:48 PM

69

1235.00

XCSE

GENMAB A/S

11-Apr-2025

17:12:56 PM

7

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:12:56 PM

53

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:12:56 PM

27

1234.50

TQEX

GENMAB A/S

11-Apr-2025

17:12:56 PM

7

1234.50

CEUX

GENMAB A/S

11-Apr-2025

17:12:56 PM

74

1234.50

CEUX

GENMAB A/S

11-Apr-2025

17:13:45 PM

14

1237.00

XCSE

GENMAB A/S

11-Apr-2025

17:13:45 PM

14

1237.00

XCSE

GENMAB A/S

11-Apr-2025

17:13:45 PM

12

1237.00

XCSE

GENMAB A/S

11-Apr-2025

17:13:45 PM

20

1237.00

XCSE

GENMAB A/S

11-Apr-2025

17:13:45 PM

34

1237.00

XCSE

GENMAB A/S

11-Apr-2025

17:13:46 PM

27

1236.50

TQEX

GENMAB A/S

11-Apr-2025

17:14:05 PM

85

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:05 PM

10

1235.00

XCSE

131


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:14:05 PM

7

1235.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:05 PM

65

1235.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:05 PM

84

1236.00

CEUX

GENMAB A/S

11-Apr-2025

17:14:47 PM

67

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

40

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

13

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

12

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

13

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

2

1236.00

XCSE

GENMAB A/S

11-Apr-2025

17:14:47 PM

25

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:14:47 PM

25

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:14:47 PM

10

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:14:47 PM

5

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:14:47 PM

16

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:15:10 PM

85

1235.50

XCSE

GENMAB A/S

11-Apr-2025

17:15:10 PM

69

1235.50

CEUX

GENMAB A/S

11-Apr-2025

17:15:18 PM

4

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:21 PM

10

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:21 PM

2

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:21 PM

10

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:21 PM

5

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:21 PM

9

1235.00

TQEX

GENMAB A/S

11-Apr-2025

17:15:26 PM

2

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

2

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

4

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

7

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

2

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

8

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

4

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

4

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

54

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

1

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:15:26 PM

63

1234.50

CEUX

GENMAB A/S

11-Apr-2025

17:16:23 PM

87

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

36

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

3

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

5

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

3

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

4

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

5

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

3

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

59

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:16:23 PM

62

1234.00

CEUX

132


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:16:23 PM

37

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:16:48 PM

4

1233.50

TQEX

GENMAB A/S

11-Apr-2025

17:16:48 PM

4

1233.50

TQEX

GENMAB A/S

11-Apr-2025

17:17:01 PM

85

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

40

1234.50

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

2

1234.50

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

12

1234.50

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

14

1234.50

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

14

1234.50

XCSE

GENMAB A/S

11-Apr-2025

17:17:01 PM

68

1234.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:01 PM

11

1234.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:10 PM

88

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:17:10 PM

55

1234.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:10 PM

24

1234.00

AQEU

GENMAB A/S

11-Apr-2025

17:17:19 PM

73

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:17:19 PM

3

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:19 PM

11

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:19 PM

2

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:19 PM

2

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:19 PM

7

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:45 PM

64

1234.00

XCSE

GENMAB A/S

11-Apr-2025

17:17:45 PM

10

1233.00

TQEX

GENMAB A/S

11-Apr-2025

17:17:45 PM

18

1233.00

TQEX

GENMAB A/S

11-Apr-2025

17:17:45 PM

52

1234.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:45 PM

3

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:45 PM

9

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:45 PM

19

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:45 PM

3

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:17:59 PM

9

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:18:00 PM

74

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:18:21 PM

4

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:18:21 PM

4

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:18:41 PM

69

1233.00

XCSE

GENMAB A/S

11-Apr-2025

17:18:41 PM

40

1233.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:04 PM

6

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:04 PM

2

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:04 PM

7

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:04 PM

8

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:04 PM

5

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:04 PM

8

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:04 PM

18

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:04 PM

2

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:04 PM

2

1232.00

CEUX

133


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:19:04 PM

21

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:04 PM

6

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:05 PM

28

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:27 PM

3

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:28 PM

2

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:28 PM

2

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:36 PM

40

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:36 PM

23

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:43 PM

27

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:43 PM

7

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:43 PM

18

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:43 PM

7

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:43 PM

7

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:19:46 PM

36

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:19:46 PM

45

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:19:46 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:46 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:19:46 PM

15

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:20:05 PM

3

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:05 PM

10

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:06 PM

40

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:20:26 PM

74

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:20:26 PM

30

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:20:26 PM

31

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:20:26 PM

32

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

1

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

5

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

2

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

3

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

2

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

4

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

5

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:26 PM

2

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:27 PM

83

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:20:45 PM

10

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:45 PM

3

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:45 PM

2

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:20:47 PM

10

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:20:47 PM

33

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:21:07 PM

84

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:21:07 PM

64

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

4

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

2

1226.50

CEUX

134


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:21:07 PM

2

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

2

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

18

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

5

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:07 PM

8

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:10 PM

20

1226.50

CEUX

GENMAB A/S

11-Apr-2025

17:21:12 PM

50

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:21:14 PM

1

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:21:14 PM

20

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:21:59 PM

30

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:22:07 PM

25

1226.50

AQEU

GENMAB A/S

11-Apr-2025

17:22:12 PM

3

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

5

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

25

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

8

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

7

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

36

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:22:12 PM

5

1225.50

TQEX

GENMAB A/S

11-Apr-2025

17:22:12 PM

15

1226.00

CEUX

GENMAB A/S

11-Apr-2025

17:22:12 PM

53

1226.00

CEUX

GENMAB A/S

11-Apr-2025

17:22:24 PM

4

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:22:24 PM

20

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:22:26 PM

35

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:48 PM

30

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:48 PM

37

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:48 PM

40

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:48 PM

4

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:22:48 PM

67

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:22:59 PM

24

1224.50

XCSE

GENMAB A/S

11-Apr-2025

17:23:26 PM

30

1223.50

XCSE

GENMAB A/S

11-Apr-2025

17:23:26 PM

31

1223.50

XCSE

GENMAB A/S

11-Apr-2025

17:23:26 PM

24

1223.50

XCSE

GENMAB A/S

11-Apr-2025

17:23:26 PM

4

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:26 PM

59

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:26 PM

11

1222.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:26 PM

6

1222.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:40 PM

15

1223.00

XCSE

GENMAB A/S

11-Apr-2025

17:23:40 PM

16

1223.00

XCSE

GENMAB A/S

11-Apr-2025

17:23:40 PM

4

1223.00

XCSE

GENMAB A/S

11-Apr-2025

17:23:40 PM

50

1223.00

XCSE

GENMAB A/S

11-Apr-2025

17:23:40 PM

6

1222.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:40 PM

5

1222.50

CEUX

GENMAB A/S

11-Apr-2025

17:23:55 PM

85

1224.00

XCSE

135


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:24:00 PM

32

1224.50

TQEX

GENMAB A/S

11-Apr-2025

17:24:01 PM

78

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:24:08 PM

56

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:24:13 PM

40

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:24:46 PM

13

1224.50

XCSE

GENMAB A/S

11-Apr-2025

17:24:47 PM

72

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:24:47 PM

11

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:24:47 PM

27

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:25:00 PM

70

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:19 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:19 PM

40

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:19 PM

5

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:26 PM

13

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:26 PM

40

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:28 PM

58

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:36 PM

5

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:36 PM

40

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:46 PM

86

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:25:50 PM

25

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:50 PM

5

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:50 PM

5

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:50 PM

3

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

3

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

4

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

22

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

3

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:25:50 PM

2

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:26:00 PM

81

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

73

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

25

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

25

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

3

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

15

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

4

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

5

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

3

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:29 PM

31

1224.50

XCSE

136


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:26:29 PM

61

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:29 PM

24

1224.00

AQEU

GENMAB A/S

11-Apr-2025

17:26:52 PM

10

1224.50

TQEX

GENMAB A/S

11-Apr-2025

17:26:52 PM

5

1224.50

TQEX

GENMAB A/S

11-Apr-2025

17:26:52 PM

5

1224.50

TQEX

GENMAB A/S

11-Apr-2025

17:26:52 PM

6

1224.50

TQEX

GENMAB A/S

11-Apr-2025

17:26:52 PM

8

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:52 PM

6

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:52 PM

15

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:53 PM

1

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:53 PM

39

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:53 PM

1

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:26:53 PM

28

1224.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:53 PM

11

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:53 PM

6

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:53 PM

24

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:26:53 PM

38

1223.50

CEUX

GENMAB A/S

11-Apr-2025

17:27:14 PM

82

1224.00

XCSE

GENMAB A/S

11-Apr-2025

17:27:14 PM

2

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:14 PM

2

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:14 PM

2

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:14 PM

7

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:14 PM

2

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:14 PM

13

1224.00

TQEX

GENMAB A/S

11-Apr-2025

17:27:27 PM

5

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:27:27 PM

6

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:27:39 PM

33

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:27:39 PM

15

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:27:39 PM

1

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:27:39 PM

36

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:27:39 PM

7

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:27:39 PM

9

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:27:39 PM

17

1225.00

CEUX

GENMAB A/S

11-Apr-2025

17:28:04 PM

13

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:04 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:04 PM

30

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:27 PM

11

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:28:27 PM

39

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:28:49 PM

10

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

23

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

14

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

12

1225.50

XCSE

137


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:28:49 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

13

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:49 PM

65

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:28:58 PM

56

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

22

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

40

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

14

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

12

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:28:58 PM

11

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:29:19 PM

24

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:29:19 PM

2

1225.00

TQEX

GENMAB A/S

11-Apr-2025

17:29:19 PM

2

1225.00

TQEX

GENMAB A/S

11-Apr-2025

17:29:19 PM

20

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:29:19 PM

16

1225.00

AQEU

GENMAB A/S

11-Apr-2025

17:29:30 PM

48

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:29:33 PM

40

1225.50

XCSE

GENMAB A/S

11-Apr-2025

17:29:33 PM

19

1225.00

TQEX

GENMAB A/S

11-Apr-2025

17:29:33 PM

3

1225.00

TQEX

GENMAB A/S

11-Apr-2025

17:29:33 PM

12

1225.00

TQEX

GENMAB A/S

11-Apr-2025

17:29:33 PM

25

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:33 PM

3

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:33 PM

34

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:33 PM

3

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:51 PM

1

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:51 PM

5

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:29:56 PM

45

1226.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:01 PM

45

1225.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:01 PM

58

1225.50

CEUX

GENMAB A/S

11-Apr-2025

17:30:26 PM

13

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:26 PM

24

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:26 PM

40

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:26 PM

13

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:26 PM

12

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:46 PM

4

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:46 PM

12

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:46 PM

12

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:30:46 PM

13

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:31:02 PM

88

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:31:12 PM

32

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

85

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:31:26 PM

3

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1226.50

TQEX

138


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:31:26 PM

3

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

4

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

11

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

9

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

3

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

4

1226.50

TQEX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

7

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

5

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

20

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

3

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:26 PM

2

1227.00

CEUX

GENMAB A/S

11-Apr-2025

17:31:27 PM

36

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:31:46 PM

5

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:31:48 PM

3

1227.00

XCSE

GENMAB A/S

11-Apr-2025

17:32:10 PM

36

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:32:11 PM

7

1228.50

AQEU

GENMAB A/S

11-Apr-2025

17:32:13 PM

36

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:32:13 PM

17

1228.50

AQEU

GENMAB A/S

11-Apr-2025

17:32:31 PM

40

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:31 PM

30

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:33 PM

53

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:52 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:52 PM

40

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:52 PM

12

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:32:52 PM

36

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:32:52 PM

4

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:32:52 PM

10

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:32:52 PM

2

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:32:52 PM

3

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:32:54 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

40

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

14

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

40

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:32:54 PM

13

1229.50

XCSE

139


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:32:58 PM

73

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:32:58 PM

28

1229.00

AQEU

GENMAB A/S

11-Apr-2025

17:33:14 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:33:25 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:33:30 PM

37

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

48

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

2

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

4

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

3

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

7

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

8

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

2

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

4

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

3

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

8

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

4

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

20

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

20

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

26

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:33:30 PM

12

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:33:30 PM

13

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:33:30 PM

7

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:33:30 PM

4

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:33:30 PM

32

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:33:50 PM

6

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:04 PM

82

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:34:05 PM

12

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:05 PM

40

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:05 PM

13

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:05 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:05 PM

13

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:05 PM

18

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:34:14 PM

50

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:34:14 PM

2

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:34:14 PM

2

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:34:42 PM

40

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:34:42 PM

37

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:34:42 PM

10

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:09 PM

39

1231.50

TQEX

GENMAB A/S

11-Apr-2025

17:35:16 PM

36

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:35:16 PM

16

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:35:28 PM

21

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:35:48 PM

14

1232.50

XCSE

140


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:35:48 PM

40

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:48 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:48 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

14

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

13

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

14

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

13

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:49 PM

68

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:35:49 PM

19

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:35:52 PM

14

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:52 PM

40

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:54 PM

40

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:54 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:54 PM

12

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:54 PM

87

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:35:59 PM

40

1232.50

XCSE

GENMAB A/S

11-Apr-2025

17:35:59 PM

33

1232.00

CEUX

GENMAB A/S

11-Apr-2025

17:36:12 PM

28

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

58

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

5

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

5

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

12

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

3

1231.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

40

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

14

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:36:12 PM

13

1232.00

XCSE

GENMAB A/S

11-Apr-2025

17:36:13 PM

28

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:36:22 PM

58

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:36:22 PM

4

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:36:22 PM

20

1231.50

CEUX

GENMAB A/S

11-Apr-2025

17:36:22 PM

28

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:36:24 PM

18

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

10

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

39

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

23

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

8

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:37:04 PM

19

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:37:04 PM

5

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:37:04 PM

55

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:37:21 PM

52

1229.50

CEUX

141


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:37:22 PM

31

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:37:22 PM

4

1228.50

TQEX

GENMAB A/S

11-Apr-2025

17:37:22 PM

3

1228.50

TQEX

GENMAB A/S

11-Apr-2025

17:37:22 PM

17

1228.50

TQEX

GENMAB A/S

11-Apr-2025

17:37:22 PM

4

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:37:22 PM

3

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:37:22 PM

8

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:37:22 PM

9

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:37:22 PM

24

1229.00

AQEU

GENMAB A/S

11-Apr-2025

17:38:41 PM

86

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

3

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

5

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

46

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

15

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

25

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

7

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

10

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:38:41 PM

30

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:38:41 PM

30

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

4

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

36

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

15

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

36

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

4

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

5

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

7

1229.50

CEUX

GENMAB A/S

11-Apr-2025

17:38:41 PM

3

1229.00

AQEU

GENMAB A/S

11-Apr-2025

17:38:41 PM

5

1229.00

AQEU

GENMAB A/S

11-Apr-2025

17:38:41 PM

16

1229.00

AQEU

GENMAB A/S

11-Apr-2025

17:38:52 PM

21

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:38:52 PM

18

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:38:53 PM

21

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

25

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

3

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

4

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

46

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:53 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:38:55 PM

4

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:08 PM

5

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:39:11 PM

32

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:39:11 PM

9

1230.50

AQEU

142


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:39:11 PM

11

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:39:31 PM

75

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

5

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

37

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

45

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:31 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:39:31 PM

50

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:39:31 PM

3

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:39:31 PM

20

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:39:31 PM

1

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:39:31 PM

8

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:39:35 PM

10

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:35 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:35 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:35 PM

46

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:39:35 PM

9

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

3

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

36

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

8

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:40:01 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:01 PM

28

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:01 PM

4

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:40:01 PM

3

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:40:02 PM

31

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:40:06 PM

7

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:06 PM

2

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:06 PM

3

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:06 PM

3

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:06 PM

2

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:40:30 PM

6

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:30 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:30 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:30 PM

46

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:40:30 PM

33

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:41:00 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:41:00 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:41:00 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:41:00 PM

3

1230.50

XCSE

143


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:41:00 PM

4

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:41:00 PM

20

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:41:00 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:15 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:41:15 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:22 PM

46

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:41:22 PM

12

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:24 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:41:24 PM

5

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:24 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:27 PM

4

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:31 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:32 PM

24

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:35 PM

32

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:41:43 PM

24

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:41:43 PM

29

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:42:14 PM

19

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:42:18 PM

27

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:42:46 PM

4

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

58

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

5

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:42:46 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:42:46 PM

25

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:42:46 PM

67

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:07 PM

30

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

13

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

5

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

35

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:07 PM

3

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:07 PM

3

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:07 PM

25

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:07 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:07 PM

20

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:07 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:07 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:07 PM

16

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:09 PM

82

1229.00

XCSE

144


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:43:34 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:34 PM

21

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:35 PM

19

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:35 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:41 PM

2

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:41 PM

36

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:41 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:41 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:47 PM

1

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:48 PM

22

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:50 PM

36

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:43:55 PM

85

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

46

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

15

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

12

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

14

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

10

1230.00

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

81

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:43:55 PM

7

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:55 PM

20

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:55 PM

1

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:55 PM

12

1229.50

TQEX

GENMAB A/S

11-Apr-2025

17:43:59 PM

4

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:00 PM

1

1230.00

AQEU

GENMAB A/S

11-Apr-2025

17:44:18 PM

111

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:44:18 PM

85

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:44:18 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:18 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:18 PM

8

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:19 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:19 PM

21

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:19 PM

8

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:19 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:20 PM

1

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:22 PM

32

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:34 PM

111

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:44:34 PM

84

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:44:35 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:35 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:35 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:35 PM

32

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:44:37 PM

13

1230.50

XCSE

145


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:44:37 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:45:09 PM

111

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:45:10 PM

71

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:45:16 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:45:22 PM

20

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:22 PM

15

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:22 PM

3

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:22 PM

5

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:22 PM

24

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:37 PM

24

1231.00

TQEX

GENMAB A/S

11-Apr-2025

17:45:37 PM

58

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:45:37 PM

24

1231.00

AQEU

GENMAB A/S

11-Apr-2025

17:46:05 PM

17

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

12

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

25

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

46

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:46:05 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:46:14 PM

16

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:01 PM

86

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

46

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

11

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

14

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

13

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

27

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:01 PM

27

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:47:01 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:02 PM

82

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:07 PM

4

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:23 PM

85

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:23 PM

58

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:23 PM

26

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:23 PM

19

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:25 PM

88

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:25 PM

88

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:47:25 PM

31

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:47:25 PM

8

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:25 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:43 PM

22

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

13

1230.50

XCSE

146


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:47:43 PM

46

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

6

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

31

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

13

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

14

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

29

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

12

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

34

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:43 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:47:43 PM

8

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:47:43 PM

7

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:47:43 PM

50

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:47:54 PM

54

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:47:54 PM

26

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:47:54 PM

50

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:47:54 PM

38

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:48:00 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:01 PM

58

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:48:01 PM

13

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:01 PM

7

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:01 PM

20

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:01 PM

8

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:01 PM

8

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:04 PM

12

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:04 PM

6

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:09 PM

25

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:48:20 PM

88

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:48:31 PM

21

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:48:31 PM

36

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:48:31 PM

8

1230.50

AQEU

GENMAB A/S

11-Apr-2025

17:48:44 PM

76

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:48:44 PM

88

1231.00

XCSE

GENMAB A/S

11-Apr-2025

17:48:44 PM

10

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:44 PM

18

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:45 PM

7

1230.50

XCSE

GENMAB A/S

11-Apr-2025

17:48:45 PM

36

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:46 PM

32

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:54 PM

11

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:54 PM

20

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:48:54 PM

2

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:49:04 PM

11

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:49:04 PM

20

1231.00

CEUX

GENMAB A/S

11-Apr-2025

17:49:12 PM

25

1230.50

XCSE

147


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:49:12 PM

26

1230.50

TQEX

GENMAB A/S

11-Apr-2025

17:49:12 PM

55

1230.50

CEUX

GENMAB A/S

11-Apr-2025

17:49:31 PM

52

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:31 PM

3

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:49:31 PM

3

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:49:31 PM

2

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:49:31 PM

4

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:49:31 PM

18

1229.00

TQEX

GENMAB A/S

11-Apr-2025

17:49:31 PM

4

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:49:32 PM

30

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:32 PM

60

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:47 PM

46

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:47 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:47 PM

14

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:47 PM

12

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:49:47 PM

19

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:50:12 PM

1

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:50:12 PM

20

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:50:12 PM

24

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:50:13 PM

36

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:50:13 PM

36

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:51:07 PM

24

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:07 PM

30

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:51:12 PM

22

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:12 PM

26

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:12 PM

46

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:12 PM

17

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:12 PM

33

1228.00

CEUX

GENMAB A/S

11-Apr-2025

17:51:12 PM

6

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:51:12 PM

7

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:51:50 PM

2

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:51:50 PM

24

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:51:50 PM

2

1228.00

CEUX

GENMAB A/S

11-Apr-2025

17:51:50 PM

6

1228.00

CEUX

GENMAB A/S

11-Apr-2025

17:51:50 PM

16

1228.00

CEUX

GENMAB A/S

11-Apr-2025

17:52:10 PM

24

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:52:10 PM

29

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:52:10 PM

15

1227.50

TQEX

GENMAB A/S

11-Apr-2025

17:52:10 PM

36

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:10 PM

7

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:10 PM

25

1227.50

AQEU

GENMAB A/S

11-Apr-2025

17:52:11 PM

29

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:52:11 PM

36

1227.50

CEUX

148


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:52:11 PM

4

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:12 PM

5

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:15 PM

14

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:16 PM

36

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:39 PM

84

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

36

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

29

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

13

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

14

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

13

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

6

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:39 PM

15

1228.00

TQEX

GENMAB A/S

11-Apr-2025

17:52:39 PM

5

1228.00

TQEX

GENMAB A/S

11-Apr-2025

17:52:39 PM

4

1228.00

TQEX

GENMAB A/S

11-Apr-2025

17:52:39 PM

39

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:39 PM

1

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:39 PM

41

1227.50

CEUX

GENMAB A/S

11-Apr-2025

17:52:40 PM

14

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:40 PM

15

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:40 PM

46

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:40 PM

36

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:52:40 PM

76

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:52:40 PM

7

1227.50

XCSE

GENMAB A/S

11-Apr-2025

17:53:10 PM

17

1228.00

CEUX

GENMAB A/S

11-Apr-2025

17:53:11 PM

27

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:11 PM

50

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:11 PM

4

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:11 PM

11

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:12 PM

88

1228.50

TQEX

GENMAB A/S

11-Apr-2025

17:53:12 PM

82

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:27 PM

111

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:53:27 PM

22

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:29 PM

13

1228.50

TQEX

GENMAB A/S

11-Apr-2025

17:53:33 PM

83

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:53:33 PM

36

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:33 PM

25

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:53:49 PM

86

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:10 PM

17

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:10 PM

2

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:10 PM

20

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:10 PM

10

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:10 PM

3

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:10 PM

17

1230.00

CEUX

149


Exhibit 99.1(b)

APPENDIX Share buy-back programme - Specification for April 10 – April 11, 2025

Graphic

GENMAB A/S

11-Apr-2025

17:54:11 PM

12

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:11 PM

12

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:11 PM

20

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:11 PM

6

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:11 PM

7

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:11 PM

8

1230.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:19 PM

60

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

4

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

24

1229.00

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

46

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

17

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

13

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:19 PM

22

1229.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:29 PM

15

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:29 PM

10

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:31 PM

42

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:34 PM

29

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:36 PM

6

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:36 PM

27

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:36 PM

3

1229.00

CEUX

GENMAB A/S

11-Apr-2025

17:54:42 PM

111

1228.50

XCSE

GENMAB A/S

11-Apr-2025

17:54:42 PM

85

1228.00

XCSE

GENMAB A/S

11-Apr-2025

17:54:44 PM

8

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:44 PM

8

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:44 PM

8

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:44 PM

11

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:44 PM

15

1228.50

CEUX

GENMAB A/S

11-Apr-2025

17:54:50 PM

2

1228.00

AQEU

150