【Yeh Hsing】Announcement of the Board of Directors' approval for the 23rd share buyback

1. Date of Board of Directors' resolution: 2026/04/23 2. Purpose of share buyback: To maintain corporate credit and shareholder equity 3. Type of shares to be repurchased: Common shares 4. Maximum total amount of shares to be repurchased (NTD): 3,519,417,584 5. Scheduled period for share buyback: 2026/04/24~2026/06/23 6. Scheduled quantity of shares to be repurchased (shares): 20,000,000 7. Buyback price range (NTD): 13.00~15.50; if the company's stock price is lower than the lower limit of the price range, the buyback will continue. 8. Method of buyback: Repurchase from the centralized trading market 9. Ratio of scheduled buyback shares to total issued shares (%): 1.07 10. Cumulative number of company shares held at the time of declaration (shares): 35,000,000 11. Status of company share buybacks within the three years prior to this declaration: (1) Actual buyback period: 2026/03/06 ~ 2026/04/23, Scheduled buyback quantity (shares): 20,000,000, Actual repurchased quantity (shares): 20,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (2) Actual buyback period: 2026/01/09 ~ 2026/03/05, Scheduled buyback quantity (shares): 15,000,000, Actual repurchased quantity (shares): 15,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (3) Actual buyback period: 2025/11/18 ~ 2026/01/06, Scheduled buyback quantity (shares): 15,000,000, Actual repurchased quantity (shares): 15,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (4) Actual buyback period: 2025/10/14 ~ 2025/11/17, Scheduled buyback quantity (shares): 12,000,000, Actual repurchased quantity (shares): 12,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (5) Actual buyback period: 2025/08/13 ~ 2025/10/03, Scheduled buyback quantity (shares): 15,000,000, Actual repurchased quantity (shares): 7,880,000, Execution status (actual repurchased quantity as % of scheduled quantity): 53.00 (6) Actual buyback period: 2025/06/10 ~ 2025/08/08, Scheduled buyback quantity (shares): 20,000,000, Actual repurchased quantity (shares): 15,236,000, Execution status (actual repurchased quantity as % of scheduled quantity): 76.00 (7) Actual buyback period: 2025/04/09 ~ 2025/06/06, Scheduled buyback quantity (shares): 30,000,000, Actual repurchased quantity (shares): 25,641,000, Execution status (actual repurchased quantity as % of scheduled quantity): 85.00 (8) Actual buyback period: 2025/01/02 ~ 2025/01/20, Scheduled buyback quantity (shares): 15,000,000, Actual repurchased quantity (shares): 7,220,000, Execution status (actual repurchased quantity as % of scheduled quantity): 48.00 (9) Actual buyback period: 2024/12/05 ~ 2024/12/31, Scheduled buyback quantity (shares): 15,000,000, Actual repurchased quantity (shares): 15,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (10) Actual buyback period: 2024/11/06 ~ 2024/12/04, Scheduled buyback quantity (shares): 10,000,000, Actual repurchased quantity (shares): 10,000,000, Execution status (actual repurchased quantity as % of scheduled quantity): 100.00 (11) Actual buyback period: 2023/10/17 ~ 2023/11/14, Scheduled buyback quantity (shares): 20,000,000, Actual repurchased quantity (shares): 3,860,000, Execution status (actual repurchased quantity as % of scheduled quantity): 19.00 (12) Actual buyback period: 2023/08/15 ~ 2023/10/13, Scheduled buyback quantity (shares): 20,000,000, Actual repurchased quantity (shares): 16,673,000, Execution status (actual repurchased quantity as % of scheduled quantity): 83.00 (13) Actual buyback period: 2023/05/05 ~ 2023/06/15, Scheduled buyback quantity (shares): 20,000,000, Actual repurchased quantity (shares): 10,021,000, Execution status (actual repurchased quantity as % of scheduled quantity): 50.00 12. Cases where declared buybacks were not fully executed: To balance market mechanisms and protect overall shareholder equity, considering that stock price fluctuations have stabilized, not all buybacks were fully executed. 13. Minutes of the Board of Directors' resolution on share buyback: Agenda: The company intends to repurchase its own shares in the centralized trading market in accordance with Article 28-2 of the Securities and Exchange Act and the "Regulations Governing Share Buybacks by Listed and OTC Companies" to protect shareholder equity. Explanation: I. The relevant conditions for this share buyback are as follows: (I) Purpose of share buyback: To maintain the company's credit and shareholder equity. (II) Type of shares to be repurchased: Common shares. (III) Maximum total amount of shares to be repurchased: NT$3,519,417,584. (IV) Buyback period and quantity: The company plans to repurchase a total of 20,000,000 shares, with the buyback period set from April 24, 2026, to June 23, 2026. (V) Buyback price range: NT$13.0 to NT$15.5 per share; however, if the stock price is lower than the lower limit of the price range,