Dyu: Announcement of the execution status of the company's eighth share buyback upon expiration

1. Original planned maximum amount for share buyback (NTD): 3,211,114,914 2. Original planned period for share buyback: 115/03/11~115/05/10 3. Original planned number of shares to be repurchased (shares): 3,000,000 4. Original planned buyback price range (NTD): 17.00~29.50 5. Actual buyback period: 115/03/11~115/05/08 6. Number of shares actually repurchased this time (shares): 2,880,000 7. Total amount of shares actually repurchased this time (NTD): 59,147,183 8. Average repurchase price per share this time (NTD): 20.54 9. Cumulative number of treasury shares held (shares): 15,706,000 10. Cumulative percentage of treasury shares held to total issued shares (%): 8.77 11. Reason for incomplete execution this time: To protect the overall interests of shareholders and in consideration of market mechanisms, the company adopted a phased buyback strategy within the price range based on stock price changes, hence the incomplete execution. 12. Other matters to be specified: The planned buyback period was from March 11, 2026, to May 10, 2026. However, May 9th and 10th are non-business days, so the expiration date was May 8, 2026.