United Microelectronics Corp 6-K, filed Oct 15, 2025
United Microelectronics Corp (UMC)
About this 6-K
United Microelectronics Corp filed this 6-K on October 15, 2025.
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
October 15, 2025
(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: October 15, 2025
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www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2025/10/15: UMC will convene Q3 2025 Investor Conference
99.2 Announcement on 2025/10/08: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC
Exhibit 99.1
UMC will convene Q3 2025 Investor Conference
1. Date of institutional investor conference: 2025/10/29
2. Time of institutional investor conference: 17:00
3. Location of institutional investor conference: Online teleconference
4. Outline of institutional investor conference:
UMC Q3 2025 Financial and Operating Results
5. Any other matters that need to be specified: None
Exhibit 99.2
United Microelectronics Corporation
For the month of September, 2025
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 August 31, 2025 |
Number of shares as of September 30, 2025 |
Changes |
Executive Vice President Vice President Vice President |
Ming Hsu S F Tzou Mindy Lin |
6,685,400 645,308 2,733,125 |
6,565,400 575,308 2,710,125 |
(120,000) (70,000) (23,000) |
Title |
Name |
Number of shares as of August 31, 2025 |
Number of shares as of September 30, 2025 |
Changes |
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