UMC details share buyback and insider activity
United Microelectronics Corporation reports recent progress in its share repurchase program and insider share activity.
Rhea-AI Filing Summary
United Microelectronics Corporation reports recent progress in its share repurchase program and insider share activity. As of 2026/05/11, the company had most recently repurchased 4,166,000 common shares for a total of NTD$391,855,237, at an average price of NTD$94.06 per share. During the repurchase period, UMC held a cumulative 8,332,000 of its own shares, equal to 0.07% of its issued shares. The filing also includes a monthly report for April 2026 on trading, pledges, and clearance of pledges by directors, executive officers, and 10% shareholders, with the provided tables showing no reported changes in shareholdings or pledged shares.
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Why did United Microelectronics issue this 6-K filing in May 2026?
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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 11, 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):
SIGNATURES
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.
United Microelectronics Corporation |
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By: |
Chitung Liu |
Name: |
Chitung Liu |
Title: |
CFO |
Date: May 11, 2026
2
EXHIBIT INDEX
Exhibit |
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Description |
99 |
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6K on 05/11/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/05/11: To announce accumulative shares repurchased exceeding NTD$300 million in value
99.2 Announcement on 2026/05/10: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC
Exhibit 99.1
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: 2026/05/11
2. No. of shares currently repurchased (shares): 4,166,000 shares
3. Type of shares currently repurchased: Common share
4. Total monetary amount of shares currently repurchased (NTD): NTD$391,855,237
5. Current average repurchase price per share (NTD): NTD$94.06
6. Cumulative no. of the company's own shares held during the repurchase period (shares): 8,332,000 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: 0.07%
8. Any other matters that need to be specified: None
Exhibit 99.2
United Microelectronics Corporation
For the month of April, 2026
This is to report 1) the trading of directors, executive officers and 10% shareholders of United Microelectronics Corporation (“UMC”) (NYSE: UMC); 2) the pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC;
Title |
Name |
Number of shares as of March 31, 2026 |
Number of shares as of April 30, 2026 |
Changes |
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Title |
Name |
Number of shares as of March 31, 2026 |
Number of shares as of April 30, 2026 |
Changes |
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