Cheng Han-Chuang Announces Completion and Execution Results of Second Treasury Stock Buyback Program

1. Original upper limit of total repurchase amount (NTD): 1,619,086,718 2. Original repurchase period: June 17, 2026 – August 15, 2026 3. Original number of shares intended for repurchase: 2,000,000 4. Original price range for repurchase (NTD): 80.00 – 138.00 5. Actual repurchase period: July 8, 2026 – August 14, 2026 6. Number of shares actually repurchased: 1,050,000 7. Total amount spent on repurchase (NTD): 98,870,728 8. Average repurchase price per share (NTD): 94.16 9. Cumulative number of treasury shares held: 3,050,000 10. Percentage of treasury shares to total issued shares: 2.97% 11. Reason for incomplete execution: To protect shareholder interests while respecting market mechanisms, the company adopted a phased repurchase strategy based on stock price movements and trading volume. Although not fully completed, the execution rate reached 52.5%. 12. Other disclosures: None