Announcement of Cash Dividend Ex-Dividend Date for 2025 Ordinary Shares by Antai Bank

1. Date of Board or Shareholders' Meeting Resolution or Company Decision: June 29, 2026 (Minguo Year 115) 2. Type of Ex-Rights or Ex-Dividend (please enter 'Ex-Rights', 'Ex-Dividend', or 'Ex-Rights-and-Dividend'): Ex-Dividend 3. Ordinary Share Dividend Type and Amount: Cash dividend of NT$0.51 per ordinary share, totaling NT$998,380,768 4. Ex-Dividend Trading Day: July 14, 2026 (Minguo Year 115) 5. Last Transfer Date: July 15, 2026 (Minguo Year 115) 6. Start Date of Transfer Suspension: July 16, 2026 (Minguo Year 115) 7. End Date of Transfer Suspension: July 20, 2026 (Minguo Year 115) 8. Ex-Dividend Reference Date: July 20, 2026 (Minguo Year 115) 9. Final Application Date for Bond Conversion: 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 6, 2026 (Minguo Year 115) 13. Other Matters to be Disclosed: The profit distribution plan for Antai Bank's 2025 fiscal year was approved at the annual shareholders' meeting held on June 24, 2026 (Minguo Year 115), authorizing the Chairman to set the ex-dividend reference date.