[Yuanta FHC] Announcement on behalf of subsidiary Yuanta Securities Vietnam regarding change in Chairman of the Council of Members

1. Date of change: 2026/05/18 2. Title of personnel changed: Chairman of the Council of Members 3. Name and title of former incumbent: Mr. Chao Jen-Kai / Chairman of the Council of Members, Yuanta Securities Vietnam 4. Brief resume of former incumbent: Mr. Chao Jen-Kai / Chairman of the Council of Members, Yuanta Securities Vietnam 5. Name and title of new incumbent: Mr. Wang Chung-Shan / Authorized Representative, Yuanta Securities Vietnam 6. Brief resume of new incumbent: Mr. Wang Chung-Shan / (1) Authorized Representative, Yuanta Securities Vietnam (2) CFO, Yuanta Securities (Thailand) (3) Senior Executive Vice President, Yuanta Securities (Thailand) 7. Type of change: New appointment 8. Reason for change: Election of a new Chairman of the Council of Members to align with the operational strategy of Yuanta Securities Vietnam 9. Shareholding of the new incumbent at the time of appointment: N/A 10. Original term of office: 2024/07/19 ~ 2029/07/18 11. Effective date of new appointment: As the Chairman of the Council of Members of Yuanta Securities Vietnam will serve as the legal representative, the appointment will become effective after approval from the Vietnamese competent authority. 12. Ratio of change in directors during the same term: N/A 13. Ratio of change in independent directors during the same term: N/A 14. Ratio of change in supervisors during the same term: N/A 15. Whether there has been a change of one-third or more of the directors: No 16. Other items to be specified: None