In Win Development Announces Change in R&D Management

1. Position Affected (Please specify spokesperson, acting spokesperson, key operational executives such as CEO, COO, CMO, CSO, CFO, accounting officer, corporate governance officer, CISO, R&D head, internal audit head, or litigation/non-litigation agent): R&D Manager 2. Date of Change: July 31, 2026 (R.O.C. Year 115) 3. Former Executive's Name, Title, and Resume: Wu-Chang Yen / R&D Manager, In Win Development 4. New Executive's Name, Title, and Resume: None 5. Nature of Change (Please select from 'resignation', 'reassignment', 'layoff', 'retirement', 'death', 'new appointment', or 'dismissal'): Retirement 6. Reason for Change: Retirement 7. Effective Date: July 31, 2026 (R.O.C. Year 115) 8. Other Matters to be Disclosed: None

This announcement constitutes material information under regulatory requirements, reflecting a significant leadership transition within the company's research and development division. The appointment of a successor will be announced separately.