Winson Announces Chairman's Determination of Dividend Ex-Date and Related Matters

1. Date of Board or Shareholders' Meeting Resolution or Company Decision: June 23, 2026 (ROC Year 115) 2. Type of Ex-Rights or Ex-Dividend (please enter 'Ex-Rights', 'Ex-Dividend', or 'Ex-Rights and Ex-Dividend'): Ex-Dividend 3. Ordinary Share Dividend Type and Amount: (1) Cash dividend from retained earnings: NT$893,731,050 (NT$25 per share) (2) Cash distribution from capital reserve: NT$893,731,050 (NT$25 per share) 4. Ex-Dividend Trading Day: July 17, 2026 (ROC Year 115) 5. Last Transfer Date: July 20, 2026 (ROC Year 115) 6. Start Date of Transfer Suspension: July 21, 2026 (ROC Year 115) 7. End Date of Transfer Suspension: July 25, 2026 (ROC Year 115) 8. Ex-Dividend Base Date: July 25, 2026 (ROC Year 115) 9. Final Date for Bond Conversion Application: June 26, 2026 (ROC Year 115) 10. Start Date of Bond Conversion Suspension: June 30, 2026 (ROC Year 115) 11. End Date of Bond Conversion Suspension: July 25, 2026 (ROC Year 115) 12. Ordinary Share Cash Dividend Payment Date: August 18, 2026 (ROC Year 115) 13. Other Matters to be Disclosed: This matter was authorized by the board resolution dated February 25, 2026 (ROC Year 115), delegating authority to the chairman.