[Asia Optical] Announcement of Ex-Dividend Date for Cash Dividends

1. Date of Board/Shareholders' resolution: 2026/05/27 2. Type of ex-rights/ex-dividend: Ex-dividend 3. Type and amount of cash dividend: NT$1,284,521,944 (NT$4.6 per share) 4. Ex-dividend trading date: 2026/06/24 5. Last transfer date: 2026/06/25 6. Book closure start date: 2026/06/26 7. Book closure end date: 2026/06/30 8. Ex-dividend record date: 2026/06/30 9. Last conversion date for bonds: N/A 10. Bond conversion suspension start date: N/A 11. Bond conversion suspension end date: N/A 12. Cash dividend payment date: 2026/07/17 13. Other matters: None.