[TSRC] Announcement of Change in Accounting Supervisor

1. Type of personnel change (please enter Spokesperson, Deputy Spokesperson, Key Operational Officer (e.g., CEO, COO, CMO, CSO), CFO, Accounting Supervisor, Corporate Governance Officer, Chief Information Security Officer, R&D Director, or Internal Audit Director/Non-litigation Agent): Accounting Supervisor 2. Date of change: May 7, 2026 3. Name, position, and brief profile of the former incumbent: Lin Xing-rong / Assistant Vice President, Accounting Department, Finance Division 4. Name, position, and brief profile of the new incumbent: Lin Yu-jun / Assistant Vice President, Finance Division 5. Nature of change (please enter "Resignation", "Job Adjustment", "Redundancy", "Retirement", "Death", "New Appointment", or "Dismissal"): Job Adjustment 6. Reason for change: Job Adjustment 7. Effective date: May 7, 2026 8. Other matters to be disclosed: None Keywords: Material Information