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6-K 1 6k_on_05122026.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

May 12, 2026

(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: May 12, 2026

 

 

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EXHIBIT INDEX

Exhibit

 

Description

 

99.1

 

 

6K on 05/12/2026

 

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 2026/05/12: To announce accumulative shares repurchased exceeding NTD$300 million in value 1. Date the cumulative no. of shares currently repurchased accounted for 2 percent or more of the shares issued by the company, or amounted to NT$300 million or more: 2026/05/12

 

 

 

 

Exhibit 99.1

To announce accumulative shares repurchased exceeding NTD$300 million in value

2. No. of shares currently repurchased (shares): 1,919,000 shares

3. Type of shares currently repurchased: Common share

4. Total monetary amount of shares currently repurchased (NTD): NTD$194,882,342

5. Current average repurchase price per share (NTD): NTD$101.55

6. Cumulative no. of the company's own shares held during the repurchase period (shares): 10,251,000 shares

7. Cumulative no. of the company’s own shares held during the repurchase period as a percentage of the total no. of the company’s issued shares: 0.08%

8. Any other matters that need to be specified: None