Jochu Announces CEO Change at Key Subsidiary JOCHU TECHNOLOGY (VIETNAM) CO., LTD.

1. Date of board resolution or change occurrence: August 7, 2026 2. Position (please enter 'Chairman' or 'General Manager'): General Manager 3. Former incumbent's name: Tseng, Jhao-Hong 4. Former incumbent's resume: Jochu Technology Co., Ltd. / Deputy General Manager 5. New appointee's name: Chiu, Chu-Chou 6. New appointee's resume: Jochu Technology Co., Ltd. / Executive Deputy General Manager 7. Nature of change (please enter 'resignation', 'dismissal', 'end of term', 'role adjustment', 'redundancy', 'retirement', 'deceased', or 'new appointment'): Role Adjustment 8. Reason for change: Role Adjustment 9. Effective date of new appointment: August 12, 2026 10. Other matters to be disclosed (if the subject is a publicly listed company, this announcement qualifies as material information under Article 7-6 of the Enforcement Rules of the Securities and Exchange Act): None

Keywords: Material Information