United Microelectronics (UMC) logs capital reduction and Xiamen subsidiary approvals
Rhea-AI Filing Summary
United Microelectronics Corporation filed a Form 6-K covering several corporate updates. Its major subsidiary United Semiconductor (Xiamen) Co., Ltd. held a shareholders’ meeting on 2026/03/12, approving the 2025 annual audited financial report and the 2026 annual operating budget, and amending its asset acquisition and disposal procedures.
UMC also completed a small capital reduction related to cancellation of restricted stock awards. Paid-in capital decreased from NT$125,881,563,440 to NT$125,785,246,190, and shares outstanding fell from 12,588,156,344 to 12,578,524,619. Book value per share rose slightly from NT$30.17 to NT$30.19.
The filing notes changes in insider holdings: Senior Vice President Chitung Liu held 4,661,917 UMC common shares as of January 31, 2026 and 4,612,917 shares as of February 28, 2026, a decrease of 49,000 shares. No pledges or releases of pledges were reported for directors, executive officers, or 10% shareholders over the same period.
Positive
- None.
Negative
- None.
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
March 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):
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: March 12, 2026
2
EXHIBIT INDEX
Exhibit |
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Description |
99 |
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6K on 03/12/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/03/12: Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce important resolutions of the 2026 Shareholders’ Meeting
99.2 Announcement on 2026/03/12: To announce the registration of capital reduction due to cancellation of the RSA
99.3 Announcement on 2026/03/09: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC
Exhibit 99.1
Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce important resolutions of the 2026 Shareholders’ Meeting
1. Date of the shareholders meeting: 2026/03/12
2. Important resolutions (1) Profit distribution/ deficit compensation: None
3. Important resolutions (2) Amendments to the corporate charter: None
4. Important resolutions (3) Business report and financial statements:
1)Approved the company’s 2025 Annual Audit Financial Report
5. Important resolutions (4) Elections for board of directors and supervisors: None
6. Important resolutions (5) Any other proposals:
1) Approved the company’s 2026 Annual Operating Budget Proposal
2) Approved to amend the company’s “Asset Acquisition and Disposal Procedures”
7. Any other matters that need to be specified: None
Exhibit 99.2
To announce the registration of capital reduction due to cancellation of the RSA
1. Date of the competent authority’s approval of capital reduction: 2026/03/11
2. Date of completion of capitalization change registration: 2026/03/11
3. Effect on the financial statements (including any discrepancy between the amount of paid-in capital and the no. of shares outstanding, and the effect on net worth per share):
(1) Before the capital reduction: The paid-in capital is NT$125,881,563,440; the shares outstanding are 12,588,156,344 shares; book value per share is NT$30.17
(2) After the capital reduction: The paid-in capital is NT$125,785,246,190; the shares outstanding are 12,578,524,619 shares; book value per share is NT$30.19
(Note: Net worth per share was calculated based on the consolidated financial statements for the year of 2025 audited by CPA.)
4. Plan for expected share replacement operations: NA
5. Estimated no. of listed common shares after capital reduction and new issue: NA
6. Estimated no. of listed common shares as a percentage of issued common shares after capital reduction and new issue (No. of common shares after capital reduction/No. of issued common shares): NA
7. Countermeasures for poor circulation of equity if the aforesaid estimated no. of listed common shares does not reach 60 million shares and the percentage does not reach 25% after capital reduction: NA
8. Any other matters that need to be specified: None
Exhibit 99.3
United Microelectronics Corporation
For the month of February, 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 January 31, 2026 |
Number of shares as of February 28, 2026 |
Changes |
Senior Vice President |
Chitung Liu |
4,661,917 |
4,612,917 |
(49,000) |
Title |
Name |
Number of shares as of January 31, 2026 |
Number of shares as of February 28, 2026 |
Changes |
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