United Microelectronics Corp 6-K, filed Jun 16, 2026
United Microelectronics Corp (UMC)
About this 6-K
United Microelectronics Corp filed this 6-K on June 16, 2026.
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
June 16, 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: June 16, 2026
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www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/06/16: To announce related materials on disposal of Novatek Microelectronics Corporation securities
99.2 Announcement on 2026/06/10: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC
Exhibit 99.1
To announce related materials on disposal of Novatek Microelectronics Corporation securities
1. Name and nature of the underlying assets (if preferred shares, the terms and conditions of issuance shall also be indicated, e.g., dividend yield, etc.):
Common shares of Novatek Microelectronics Corporation
2. Date of occurrence of the event: 2026/06/05~2026/06/16
3. Date of the board of directors’ resolution: NA
4. Other approval date:
Approval level: NA
2026/06/16
5. Amount, unit price, and total monetary amount of the transaction:
trading volume: 1,174,694 shares;
average unit price: $479.8 NTD;
total amount: $563,618,180 NTD
6. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed):
Shares Conversion of zero coupon exchangeable bonds due 2026
7. Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading counterparty, and the previous date and monetary amount of transfer: NA
8. Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement shall also include the date and price of acquisition and disposal by the related party, and its relationship with the Company at the time of the transaction: NA
9. Matters related to the current disposal of creditors' rights (including types of collaterals of the disposed creditor’s rights; if creditor’s rights over a related party, announcement shall be made of the name of the related party and the book amount of the creditor's rights, currently being disposed of, over such related party): NA
10. Profit or loss from the disposal (not applicable in cases of acquisition of securities) (those with deferral should provide a table explaining recognition):
Impact on retained earnings: $386,963,843 NTD. (No impact to net income)
11. Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract, and other important terms and conditions:
Shares Conversion of zero coupon exchangeable bonds due 2026
12. The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference basis for the decision on price, and the decision-making unit:
Based on the offering memorandum
13. Net worth per share of the Company’s underlying securities acquired or disposed of: $118.2 NTD
14. Cumulative no. of shares held (including the current transaction), their monetary amount, shareholding percentage, and status of any restriction of rights (e.g., pledges), as of the present moment:
cumulative volume: 15,269,893 shares;
amount: $7,280,449,819 NTD;
percentage of holdings: 2.51%;
status of any restriction of rights: None
15. Current ratio of securities investment (including the current trade, as listed in article 3 of Regulations Governing the Acquisition and Disposal of Assets by Public Companies) to the total
assets and equity attributable to owners of the parent as shown in the most recent financial statement and working capital as shown in the most recent financial statement as of the present:
ratio of total assets: 42.27%;
ratio of shareholder’s equity: 57.85%;
the operational capital as shown in the most recent financial statement: $44,980,640 thousand NTD
16. Broker and broker’s fee: None
17. Concrete purpose or use of the acquisition or disposal:
Shares Conversion of zero coupon exchangeable bonds due 2026
18. Any dissenting opinions of directors to the present transaction: NA
19. Whether the counterparty of the current transaction is a related party: No
20. Date of ratification by supervisors or approval by the Audit Committee: NA
21. Whether the CPA issued an unreasonable opinion regarding the current transaction: NA
22. Name of the CPA firm: NA
23. Name of the CPA: NA
24. Practice certificate number of the CPA: NA
25. Whether the transaction involved in change of business model: No
26. Details on change of business model: NA
27. Details on transactions with the counterparty for the past year and the expected coming year: NA
28. Source of funds: NA
29. Date on which material information regarding the same event has been previously released: NA
30. Any other matters that need to be specified: None
Exhibit 99.2
United Microelectronics Corporation
For the month of May, 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 |
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Number of shares as of April 30, 2026 |
Number of shares as of May 31, 2026 |
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Title |
Name |
Number of shares as of April 30, 2026 |
Number of shares as of May 31, 2026 |
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