Sonix Announces Dividend Ex-Date

1. Date of Board, Shareholders' Meeting Resolution or Company Decision: June 17, 2026 2. Type of Rights or Dividend Adjustment (please enter 'Rights Issue', 'Dividend', or 'Rights and Dividend'): Dividend 3. Ordinary Share Cash Dividend Type and Amount: Cash dividend of TWD 134,301,650 (TWD 0.8 per share) 4. Ex-Rights (Ex-Dividend) Trading Day: July 14, 2026 5. Last Transfer Date: July 15, 2026 6. Start Date of Transfer Suspension: July 16, 2026 7. End Date of Transfer Suspension: July 20, 2026 8. Ex-Rights (Ex-Dividend) Benchmark Date: July 20, 2026 9. Final Date for Bond Conversion Application: Not applicable 10. Start Date of Bond Conversion Suspension: Not applicable 11. End Date of Bond Conversion Suspension: Not applicable 12. Ordinary Share Cash Dividend Payment Date: August 7, 2026 13. Other Matters to be Disclosed: None