HIWIN Announces Ex-Dividend Date

1. Date of Board, Shareholders' Meeting Resolution or Company Decision: 06/15/2026 (ROC 115) 2. Type of Rights/Dividend (please enter 'Rights', 'Dividend', or 'Rights & Dividend'): Dividend 3. Ordinary Share Dividend Type and Amount: Cash dividend of NT$707,584,480, NT$2.0 per share 4. Ex-Rights/Dividend Trading Day: 07/08/2026 5. Last Transfer Date: 07/09/2026 6. Transfer Suspension Start Date: 07/10/2026 7. Transfer Suspension End Date: 07/14/2026 8. Ex-Rights/Dividend Reference Date: 07/14/2026 9. Final Bond Conversion Application Date: Not applicable 10. Bond Conversion Suspension Start Date: Not applicable 11. Bond Conversion Suspension End Date: Not applicable 12. Ordinary Share Cash Dividend Payment Date: 08/05/2026 13. Other Matters to be Disclosed: None