Announcement of Ex-Dividend Record Date

1. Board of Directors, shareholders' meeting resolution or company decision date: June 8, 2026 2. Type of ex-rights/ex-dividend: Ex-dividend 3. Type and amount of common stock dividend: Total cash dividend of NT$73,842,023, with NT$0.15 per share. 4. Ex-dividend trading date: June 25, 2026 5. Last record date: June 28, 2026 6. Book closure start date: June 29, 2026 7. Book closure end date: July 3, 2026 8. Ex-dividend record date: July 3, 2026 9. Last date for bond conversion: Not applicable 10. Bond conversion suspension start date: Not applicable 11. Bond conversion suspension end date: Not applicable 12. Common stock cash dividend payment date: July 24, 2026 13. Other matters: As the last record date (June 28, 2026) falls on a Sunday, please complete the share transfer procedures before 4:30 PM on June 26, 2026.