Material Information

2026-03-11

Correction to the amount of cash dividends for 2025 on page 28 of the 2025 Consolidated and Individual Financial Reports

Serial No. 1
Date of Announcement 2026/04/01
Time of Announcement 15:14:42
Spokesperson Wang, Yuan-Ming
Spokesperson Title Chairman and General Manager
Spokesperson Tel 26499168
Subject Correction to the amount of cash dividends for 2025 on page 28 of the Consolidated and Individual Financial Reports
Regulatory Clause Clause 44
Date of Event 2026/04/01
Description 1. Date of occurrence: 2026/04/01
2. Company name: Upmost Microelectronics Corp.
3. Relationship with the Company: The Company
4. Mutual shareholding ratio: Not applicable
5. Cause of occurrence: Correction to the notes of the financial reports.
6. Item(s) corrected / Name of report: 2025 Cash Dividend Amount / Cash dividend amount in Consolidated and Individual Financial Reports.
7. Original amount / content / page: NT$30,000 thousand / 2025 Cash Dividend Amount / Page 28
8. Corrected amount / content / page: NT$45,000 thousand / 2025 Cash Dividend Amount / Page 28
9. Countermeasures: Announce material information on the Market Observation Post System (MOPS) and re-upload the financial reports.
10. Any other matters that need to be specified: Not applicable.

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