【Sanneng-KY】Announcement of the Ex-Dividend Record Date

1. Date of Board, Shareholders' Meeting Resolution or Company Decision: July 7, 2026 (ROC Year 115) 2. Type of Rights/Dividend Adjustment (please enter 'Rights Issue', 'Dividend Distribution', or 'Rights and Dividend'): Dividend Distribution 3. Type and Amount of Ordinary Share Cash Dividend: Cash dividend of TWD 1.20 per ordinary share, totaling TWD 72,900,000 4. Ex-Dividend Trading Date: July 23, 2026 (ROC Year 115) 5. Last Transfer Date: July 24, 2026 (ROC Year 115) 6. Start Date of Transfer Suspension: July 25, 2026 (ROC Year 115) 7. End Date of Transfer Suspension: July 29, 2026 (ROC Year 115) 8. Ex-Dividend Record Date: July 29, 2026 (ROC Year 115) 9. Final Date for Bond Conversion Application: Not applicable 10. Start Date of Bond Conversion Suspension: Not applicable 11. End Date of Bond Conversion Suspension: Not applicable 12. Ordinary Share Cash Dividend Payment Date: August 21, 2026 (ROC Year 115) 13. Other Matters to be Disclosed: The cash dividend is scheduled to be paid on August 21, 2026. However, if adjustments are required due to objective circumstances, the Chairman is authorized to handle all matters in accordance with the Ministry of Economic Affairs' letter No. 10002407180 dated April 7, 2011 (ROC Year 100).