UMC to begin U.S. insider trading disclosures
United Microelectronics Corporation filed a report explaining new U.S. disclosure requirements for its leaders.
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Rhea-AI Filing Summary
United Microelectronics Corporation filed a report explaining new U.S. disclosure requirements for its leaders. Due to the Holding Foreign Insiders Accountable Act, effective from March 18, 2026, the company’s directors and officers must publicly report their ownership of, and transactions in, UMC equity securities under Section 16(a) of the U.S. Securities Exchange Act of 1934.
These insider ownership and trading disclosures will be available on the U.S. SEC’s EDGAR website, giving investors a direct view into how key insiders hold and trade UMC stock.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did UMC (UMC) announce in this Form 6-K?
When do UMC directors and officers start Section 16(a) reporting?
Which law triggers the new UMC insider disclosure requirements?
Where can investors find UMC insider trading disclosures?
Who within UMC is affected by the new U.S. reporting rules?
AI-generated analysis. How Rhea-AI works. Not financial advice.
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 26, 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 26, 2026
2
EXHIBIT INDEX
Exhibit |
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Description |
99.1 |
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6K on 03/26/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/03/26: Announcement on Disclosures by Directors and Officers pursuant to the U.S. Securities Exchange Act
Exhibit 99.1
Announcement on Disclosures by Directors and Officers pursuant to the U.S. Securities Exchange Act
1. Date of occurrence of the event: 2026/03/26
2. Company name: UNITED MICROELECTRONICS CORPORATION
3. Relationship to the Company (please enter “head office” or “subsidiaries”): head office
4. Reciprocal shareholding ratios: N/A
5. Cause of occurrence: N/A
6. Countermeasures: N/A
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.):
According to the “Holding Foreign Insiders Accountable Act”, enacted by U.S. Congress on December 18, 2025, from March 18, 2026, the Company’s directors and officers will be required to disclose their ownership of and transactions in the Company’s equity securities in accordance with Section 16(a) of the U.S. Securities Exchange Act of 1934. For related disclosures, please visit the U.S. SEC’s EDGAR website: https://www.sec.gov/edgar/browse/?CIK=1033767&owner=only