First Financial Holdings' Subsidiary First Securities Announces Change in Corporate Director Representative

1. Date of Change: June 23, 2026 2. Corporate Name: First Securities Co., Ltd. 3. Former Representative's Name: Ya-Wen Yang 4. Former Representative's Background: Senior Manager at First Securities 5. New Representative's Name: None 6. New Representative's Background: None 7. Reason for Change: Resignation 8. Original Term (e.g., xx/xx/xx to xx/xx/xx): May 5, 2025 to May 4, 2028 9. Effective Date of New Appointment: None 10. Other Matters to be Disclosed: None Keywords: Material Information