Powerchip Semiconductor Manufacturing Corporation Chairman Huang Chong-ren Passes Away

Announcement Date: August 1, 2026 Statement Date: July 31, 2026 Statement Time: 17:51:52 Company Code: 6770 Company Name: Powerchip Semiconductor Manufacturing Corporation Subject: Announcement Regarding the Passing of the Company's Chairman Applicable Clause: Item 6 Event Date: July 31, 2026

Details: 1. Board Resolution or Change Date: July 31, 2026 2. Position (Please enter 'Chairman' or 'President'): Chairman 3. Former Name: Huang Chong-ren 4. Former Resume: Chairman and CEO of Powerchip Technology Corporation 5. New Appointee Name: To be announced 6. New Appointee Resume: To be announced 7. Nature of Change ('Resignation', 'Dismissal', 'End of Term', 'Duties Adjusted', 'Redundancy', 'Retirement', 'Passing', or 'New Appointment'): Passing 8. Reason for Change: Passing 9. Effective Date of New Appointment: To be announced 10. Additional Notes (If the subject of this event or resolution is a publicly listed company, this material information also meets the criteria under Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act regarding matters significantly affecting shareholder rights or securities prices): The Company’s Chairman, Dr. Huang Chong-ren, passed away peacefully in his sleep at home this afternoon (July 31) due to respiratory and cardiac failure. Mr. Hsieh Tsai-chu, the Vice Chairman, will legally act as the Chairman. The Company’s production and sales operations will continue to advance according to established plans. All employees remain fully committed to carrying forward the vision of Founder Dr. Huang Chong-ren in pioneering new frontiers for Taiwan’s high-tech industry.