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6-K 1 6k_on_09042025.htm 6-K 6-K

 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

September 4, 2025

(Commission File Number: 001-15128)

United Microelectronics Corporation

(Translation of registrant’s name into English)

No. 3 Li-Hsin 2nd Road,

Hsinchu Science Park,

Hsinchu, Taiwan, R.O.C.

(Address of principal executive office)

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 

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1): 

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7):  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, thereto duly authorized.

 


 

SIGNATURES

 

United Microelectronics Corporation

 

 

 

By:

Chitung Liu

Name:

Chitung Liu

Title:

CFO

Date: September 4, 2025

 

 

2


 

 

EXHIBIT INDEX

Exhibit

 

Description

 

99.1

 

 

6K on 09/04/2025

 

3


EX-99.1 2 umc-ex99_1.htm EX-99.1 EX-99.1

 

img208044986_0.jpg www.umc.com

Exhibit

Exhibit Description

 

99.1 Announcement on 2025/09/04: August Revenue This is to report the changes or status of 1) Sales volume, 2) Funds lent to other parties, 3) Endorsements and guarantees, and 4) Financial derivative transactions for the period of August 2025.

 

 

 

 


 

Exhibit 99.1

United Microelectronics Corporation

September 4, 2025

 

1)
Sales volume (NT$ Thousand)

Period

Items

2025

2024

Changes

%

August

Net sales

19,159,816

20,645,494

(1,485,678)

(7.20)%

Year-to-Date

Net sales

155,816,479

152,973,760

2,842,719

1.86%

 

2)
Funds lent to other parties (NT$ Thousand): None

 

3)
Endorsements and guarantees (NT$ Thousand)
Balance as of period end This Month

(actual amount provided)

Last Month

(actual amount provided)

Limit of lending

UMC

3,645,720

3,518,325

151,592,175

Note: On February 22, 2017, March 7, 2018, October 24, 2018, July 24,2019, December 18, 2019, July 29, 2020, October 29, 2020, December 16, 2020, July 28, 2021, October 27, 2021, December 15, 2021, April 27, 2022, October 26, 2022, December 14, 2022, April 26, 2023, July 26, 2023, December 13, 2023, February 27, 2024 ,July 31, 2024, December 18, 2024, February 26, 2025 and July 30, 2025, the board of directors resolved to provide endorsement to USC(Xiamen)’s syndicated loan from banks for the amount up to CNY¥ 855 million.

4)
Financial derivatives transactions:

a Not under hedging accounting: NT$ thousand

UMC

  Financial instruments

Option

Forwards

IRS

 

Put

Call

 

 

  Deposit Paid

0

0

0

0

  Royalty Income (Paid)

0

0

0

0

  Unwritten-off Trading

 

 

 

 

  Contracts

0

0

0

0

  Fair Value

0

0

0

0

  Net profit (loss) from Fair Value

0

0

1,037

0

  Written-off Trading

 

 

 

 

  Contracts

0

0

4,481,221

0

  Realized profit (loss)

0

0

6,547

0