Tongmei Announces Correction to Partial Contents of 2025 Annual Report

1. Factual Date: 2026/08/11 2. Company Name: Tongmei Semiconductor Co., Ltd. 3. Relationship with Company (please enter本公司or Subsidiary):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Correction of partial contents in the 2025 Annual Report for the shareholders' meeting as instructed by the Taiwan Stock Exchange 6. Corrected Information Item/Report Name: 2025 Annual Report of本公司 7. Information Before Correction/Amount/Content/Page: Chinese Version: Pages 3, 52, 66–67 English Version: Pages 3–4, 72, 88–89 8. Information After Correction/Amount/Content/Page: Chinese Version: Pages 3–4, 52–53, 66–68 English Version: Pages 3–4, 72–73, 91–94 9. Response Measures: Re-upload of the 2025 Annual General Meeting Report – Revised Version (Post-Shareholders' Meeting) (Chinese and English versions) 10. Other Matters to be Stated: None