United Microelectronics (NYSE: UMC) details capital cut and bond conversion terms
Rhea-AI Filing Summary
United Microelectronics Corporation reported a small capital reduction following cancellation of restricted share awards, with paid-in capital moving from NT$125,769,848,700 to NT$125,700,938,990. Shares outstanding decreased from 12,546,433,870 to 12,539,542,899, while book value per share rose slightly from NT$35.38 to NT$35.40.
The company also detailed terms for its 2nd domestic unsecured convertible corporate bond. The base price was set using the average closing price of NT$124.5 per share on the reference date, with a conversion premium rate of 104.98%, resulting in a conversion price of NT$130.7 per share. Separately, a July 2026 insider report shows Senior Vice President Chitung Liu’s holdings decreasing by 1,900,000 shares, and Senior Vice President G C Hung recording a new pledge of 1,200,000 shares.
Positive
- None.
Negative
- None.
Filing Explained
The capital reduction was completed August 10; the convertible bond filing is effective, but no conversion or new-share issuance is reported.
As a Form 6-K, this filing furnishes material home-market information. UMC’s capital reduction from cancelling restricted share awards is completed: both regulatory approval and capitalization-change registration occurred on
The filing also reports that the second domestic unsecured convertible bond became effective upon filing with Taiwan’s Financial Supervisory Commission. Its conversion price is set, but this filing reports neither a conversion nor issuance of shares from conversion.
Key Figures
Key Terms
capital reduction financial
convertible corporate bond financial
FAQ
What capital reduction did UMC (UMC) report in August 2026?
What are the conversion terms for UMC’s 2nd domestic unsecured convertible bond?
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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
August 14, 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: August 14, 2026
2
EXHIBIT INDEX
Exhibit |
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Description |
99 |
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6K on 08/14/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/08/11: To announce the registration of capital reduction due to cancellation of the RSA
99.2 Announcement on 2026/08/14: Announcement of the conversion price and premium rate for the 2nd domestic unsecured convertible corporate bond
99.3 Announcement on 2026/08/10: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC
Exhibit 99.1
To announce the registration of capital reduction due to cancellation of the RSA
1. Date of the competent authority’s approval of capital reduction: 2026/08/10
2. Date of completion of capitalization change registration: 2026/08/10
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$125,769,848,700; the shares outstanding are 12,546,433,870 shares; book value per share is NT$ 35.38
(2) After the capital reduction: The paid-in capital is NT$125,700,938,990; the shares outstanding are 12,539,542,899 shares; book value per share is NT$ 35.40
(Note: Net worth per share was calculated based on the consolidated financial statements for the second quarter of 2026 reviewed 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 99.2
Announcement of the conversion price and premium rate for the 2nd domestic unsecured convertible corporate bond
1. Date of occurrence of the event: 2026/08/14
2. Company name: UNITED MICROELECTRONICS CORPORATION
3. Relationship to the Company (please enter “head office” or “subsidiaries”): head office
4. Reciprocal shareholding ratios: Not applicable
5. Cause of occurrence:
Announcement in accordance with “Rules Governing the Issuance and Conversion of the 2nd Domestic Unsecured Convertible Corporate Bond.”
6. Countermeasures: None
7. Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.):
(1) The issuance of the 2nd domestic unsecured convertible corporate bond has become effective upon filing with the Financial Supervisory Commission, R.O.C. (Taiwan) (“FSC”), pursuant to FSC Letter No. 11503489291 dated July 17, 2026.
(2) The base price is determined based on the average closing price of the common shares over the one business day prior to the conversion price determination reference date of August 14, 2026, which is NT$124.5 per share; the conversion premium rate is 104.98%.
(3) Based on the above method, the conversion price is set at NT$130.7 per share.
Exhibit 99.3
United Microelectronics Corporation
For the month of July, 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 June 30, 2026 |
Number of shares as of July 31, 2026 |
Changes |
Senior Vice President |
Chitung Liu |
4,012,917 |
2,112,917 |
(1,900,000) |
Title |
Name |
Number of shares as of June 30, 2026 |
Number of shares as of July 31, 2026 |
Changes |
Senior Vice President |
G C Hung |
-- |
1,200,000 |
1,200,000 |