Yi Chia Announces Board Chairman's Resolution on Dividend Ex-Date and Related Matters

1. Date of Board of Directors, Shareholders' Meeting Resolution, or Company Decision: July 1, 2026 (ROC Year 115) 2. Type of Rights/Dividend Adjustment (please enter 'Rights Adjustment', 'Dividend Adjustment', or 'Rights & Dividend Adjustment'): Dividend Adjustment 3. Ordinary Share Dividend Type and Amount: Cash dividend from retained earnings: NT$615,073,066, with NT$2.00 per share distributed 4. Ex-Dividend Trading Day: July 29, 2026 (ROC Year 115) 5. Last Transfer Date: July 30, 2026 (ROC Year 115) 6. Transfer Suspension Start Date: July 31, 2026 (ROC Year 115) 7. Transfer Suspension End Date: August 4, 2026 (ROC Year 115) 8. Ex-Dividend Reference Date: August 4, 2026 (ROC Year 115) 9. Final Application Date for Bond Conversion: July 8, 2026 (ROC Year 115) 10. Bond Conversion Suspension Start Date: July 10, 2026 (ROC Year 115) 11. Bond Conversion Suspension End Date: August 4, 2026 (ROC Year 115) 12. Ordinary Share Cash Dividend Payment Date: August 25, 2026 (ROC Year 115) 13. Other Matters to be Disclosed: The suspension period for conversion of the company's third domestic unsecured convertible bonds is from July 10, 2026 to August 4, 2026. Bondholders who wish to apply for conversion must complete the conversion procedures with their brokerage firm by July 8, 2026 at the latest.