| Exhibit | Description of Exhibit | ||||
| 99.1 | Company Announcement Dated March 2, 2026: Correction to Company Announcement No. 13 of March 2, 2026
|
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| GENMAB A/S | ||||||||
| BY: | /s/ Anthony Pagano | |||||||
| Name: Anthony Pagano | ||||||||
| Title: Executive Vice President & Chief Financial Officer | ||||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated |
|||||||||||||
| a) | Name |
Jan van de Winkel |
||||||||||||
| 2. | Reason for the notification |
|||||||||||||
| a) | Position/status |
President & Chief Executive Officer |
||||||||||||
| b) | Initial notification/Amendment |
Amendment to Company Announcement no. 13 of March 2, 2026 |
||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
|||||||||||||
| a) | Name |
Genmab A/S |
||||||||||||
| b) | LEI-code |
529900MTJPDPE4MHJ122 |
||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
|||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code |
Share
DK0010272202
|
||||||||||||
| b) | Nature of the transaction |
Acquisition due to vesting of restricted stock units |
||||||||||||
| c) | Price(s) and volume(s) |
Price(s) |
Volume(s) |
|||||||||||
DKK 1,867.50 |
567 |
|||||||||||||
| d) | Aggregated information - Aggregated volume - Price |
567 shares
DKK 1,867.50
|
||||||||||||
| e) | Date of the transaction |
2026-03-02 |
||||||||||||
| f) | Place of the transaction |
Outside the market |
||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 1/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated |
|||||||||||||
| a) | Name |
Anthony Pagano |
||||||||||||
| 2. | Reason for the notification |
|||||||||||||
| a) | Position/status |
Executive Vice President & Chief Financial Officer |
||||||||||||
| b) | Initial notification/Amendment |
Amendment to Company Announcement no. 13 of March 2, 2026 |
||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
|||||||||||||
| a) | Name |
Genmab A/S |
||||||||||||
| b) | LEI-code |
529900MTJPDPE4MHJ122 |
||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
|||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code |
Share
DK0010272202
|
||||||||||||
| b) | Nature of the transaction |
Acquisition due to vesting of restricted stock units |
||||||||||||
| c) | Price(s) and volume(s) |
Price(s) |
Volume(s) |
|||||||||||
DKK 1,867.50 |
200 |
|||||||||||||
| d) | Aggregated information - Aggregated volume - Price |
200 shares
DKK 1,867.50
|
||||||||||||
| e) | Date of the transaction |
2026-03-02 |
||||||||||||
| f) | Place of the transaction |
Outside the market |
||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 2/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated |
|||||||||||||
| a) | Name |
Mijke Zachariasse |
||||||||||||
| 2. | Reason for the notification |
|||||||||||||
| a) | Position/status |
Member of the Board of Directors |
||||||||||||
| b) | Initial notification/Amendment |
Amendment to Company Announcement no. 13 of March 2, 2026 |
||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
|||||||||||||
| a) | Name |
Genmab A/S |
||||||||||||
| b) | LEI-code |
529900MTJPDPE4MHJ122 |
||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
|||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code |
Share
DK0010272202
|
||||||||||||
| b) | Nature of the transaction |
Acquisition due to vesting of restricted stock units (as employee of Genmab B.V.) |
||||||||||||
| c) | Price(s) and volume(s) |
Price(s) |
Volume(s) |
|||||||||||
DKK 1,867.50 |
64 |
|||||||||||||
| d) | Aggregated information - Aggregated volume - Price |
64 shares
DKK 1,867.50
|
||||||||||||
| e) | Date of the transaction |
2026-03-02 |
||||||||||||
| f) | Place of the transaction |
Outside the market |
||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 3/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated |
|||||||||||||
| a) | Name |
Martin Schultz |
||||||||||||
| 2. | Reason for the notification |
|||||||||||||
| a) | Position/status |
Member of the Board of Directors |
||||||||||||
| b) | Initial notification/Amendment |
Amendment to Company Announcement no. 13 of March 2, 2026 |
||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
|||||||||||||
| a) | Name |
Genmab A/S |
||||||||||||
| b) | LEI-code |
529900MTJPDPE4MHJ122 |
||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
|||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code |
Share
DK0010272202
|
||||||||||||
| b) | Nature of the transaction |
Acquisition due to vesting of restricted stock units (as employee of Genmab A/S) |
||||||||||||
| c) | Price(s) and volume(s) |
Price(s) |
Volume(s) |
|||||||||||
DKK 1,867.50 |
197 |
|||||||||||||
| d) | Aggregated information - Aggregated volume - Price |
197 shares
DKK 1,867.50
|
||||||||||||
| e) | Date of the transaction |
2026-03-02 |
||||||||||||
| f) | Place of the transaction |
Outside the market |
||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 4/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated |
|||||||||||||
| a) | Name |
Michael Kavanagh |
||||||||||||
| 2. | Reason for the notification |
|||||||||||||
| a) | Position/status |
Member of the Board of Directors |
||||||||||||
| b) | Initial notification/Amendment |
Amendment to Company Announcement no. 13 of March 2, 2026 |
||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor |
|||||||||||||
| a) | Name |
Genmab A/S |
||||||||||||
| b) | LEI-code |
529900MTJPDPE4MHJ122 |
||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted |
|||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code |
Share
DK0010272202
|
||||||||||||
| b) | Nature of the transaction |
Acquisition due to vesting of restricted stock units (as employee of Genmab US, Inc.) |
||||||||||||
| c) | Price(s) and volume(s) |
Price(s) |
Volume(s) |
|||||||||||
DKK 1,867.50 |
305 |
|||||||||||||
| d) | Aggregated information - Aggregated volume - Price |
305 shares
DKK 1,867.50
|
||||||||||||
| e) | Date of the transaction |
2026-03-02 |
||||||||||||
| f) | Place of the transaction |
Outside the market |
||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 5/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
||||||

| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark |
Tel: +45 7020 2728 www.genmab.com |
Company Announcement no. 14
Page 6/6
CVR no. 2102 3884
LEI Code 529900MTJPDPE4MHJ122
|
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