[Diamond Investment] Announcement of Change in Company President

1. Date of Board Resolution or Change: 2026/07/03 2. Position (Please enter 'Chairman' or 'President'): President 3. Former President's Name: Wu You-Mei 4. Former President's Resume: President of Diamond Biotech Investment Co., Ltd. 5. New President's Name: Lu Kong-Ming 6. New President's Resume: Chairman of the Investment Review Committee, Diamond Biotech Investment Co., Ltd. 7. Nature of Change (Please enter 'Resignation', 'Dismissal', 'End of Term', 'Job Adjustment', 'Redundancy', 'Retirement', 'Death', or 'New Appointment'): Job Adjustment 8. Reason for Change: Job Adjustment 9. Effective Date of New Appointment: 2026/07/03 10. Other Matters to be Disclosed (If the subject is a publicly listed company, this information qualifies as material under Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act): None

Keywords: Material Information