Cooperative Bank Announces Resignation of Independent Director

1. Date of Change: 2026/06/15 2. Category of Personnel Change (Corporate Director, Corporate Supervisor, Independent Director, Individual Director, or Individual Supervisor): Independent Director 3. Former Position and Name: Lin Hsuan-Chu 4. Former Director's Resume: Professor and Department Chair, Department of Accounting and Institute of Finance, National Cheng Kung University 5. New Director's Position and Name: None 6. New Director's Resume: None 7. Nature of Change (Please enter 'Resignation', 'Dismissal', 'End of Term', 'Deceased', or 'New Appointment'): Resignation 8. Reason for Change: Resignation 9. Shareholding of New Director at Time of Appointment: Not Applicable 10. Original Term (e.g., xx/xx/xx ~ xx/xx/xx): 2023/09/07 ~ 2026/09/06 11. Effective Date of New Appointment: Not Applicable 12. Ratio of Director Changes within Same Term: 7/24 13. Ratio of Independent Director Changes within Same Term: 1/5 14. Ratio of Supervisor Changes within Same Term: Not Applicable 15. Whether More Than One-Third of Directors Have Changed (Please enter Yes or No): No 16. Other Matters to be Clarified: This change shall take effect from June 18, 2026.

This announcement qualifies as material information under Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act, as the subject entity is a publicly issued company, and the change may have significant implications for shareholder rights or securities prices.