ASE Group Announces Full Board Election at Subsidiary Huan Cheng Technology Co., Ltd.

1. Date of Change: 2026/06/29

2. Category of Appointed or Changed Personnel (please select from: corporate director, corporate supervisor, independent director, individual director, or individual supervisor): Individual Director

3. Former Position and Name: (1) Director: Wei Zhen-Yan (2) Director: Shi Meng-Guo

4. Former Personnel's Background: (1) Wei Zhen-Yan: Director (Representative) of Huan Electric (Co.) Ltd. (2) Shi Meng-Guo: Director (Representative) of Huan Electric (Co.) Ltd.

5. New Position and Name: (1) Director: Wei Zhen-Yan (2) Director: Shi Meng-Guo

6. New Personnel's Background: (1) Wei Zhen-Yan: Director (Representative) of Huan Electric (Co.) Ltd. (2) Shi Meng-Guo: Director (Representative) of Huan Electric (Co.) Ltd.

7. Nature of Change (please enter 'resignation', 'dismissal', 'term expiration', 'deceased', or 'new appointment'): Term Expiration

8. Reason for Change: Full board re-election due to term expiration

9. Number of Shares Held by New Appointees at Time of Election: 0 shares

10. Previous Term (e.g., xx/xx/xx ~ xx/xx/xx): (1) Director Wei Zhen-Yan: 2025/06/24 ~ 2026/06/24 (2) Director Shi Meng-Guo: 2025/06/24 ~ 2026/06/24

11. Effective Date of New Appointment: 2026/06/29

12. Percentage of Director Changes Within Same Term: 100%

13. Percentage of Independent Director Changes Within Same Term: Not Applicable

14. Percentage of Supervisor Changes Within Same Term: Not Applicable

15. Is the Change Involving One-Third or More of the Directors? (Yes or No): Yes

16. Other Matters to be Clarified: None.

Keywords: Material Information