[SinoPac] Supplemental Announcement by SinoPac Holdings regarding the issuance of unsecured subordinated ordinary corporate bonds by its subsidiary, SinoPac Securities

1. Date of Board of Directors resolution: NA 2. Name: SinoPac Securities Co., Ltd. 2026 (115th year of the Republic of China) 1st Unsecured Subordinated Ordinary Corporate Bonds (Supplement) 3. Whether general reporting for bond issuance is adopted: No 4. Total issuance amount: 3 billion TWD (Supplement) 5. Face value per unit: 1 million TWD 6. Issuance price: Issued at par value 7. Issuance period: 115/06/12 - 125/06/12 (Supplement) 8. Issuance interest rate: Fixed annual interest rate of 2.41% (Supplement) 9. Type, name, amount, and terms of collateral: N/A 10. Use of funds and operation plan: Strengthen financial structure and improve the company's capital adequacy ratio and liquidity ratio 11. Underwriting method: Entrust securities underwriters to conduct public underwriting via negotiated sales 12. Bond trustee: Taishin International Bank (Supplement) 13. Underwriting or distributing institution: SinoPac Securities acts as the lead underwriter 14. Guarantor: N/A 15. Agent for principal and interest repayment: Taishin International Bank (Supplement) 16. Certification agency: N/A 17. Conversion terms: N/A 18. Put options: N/A 19. Call options: N/A 20. Conversion/exchange/warrant exercise base date: N/A 21. Potential dilution: N/A 22. Rationality of fundraising after cash capital reduction: N/A 23. Other items to be stated: None