First Financial Holding: Subsidiary First Bank Announces Issuance of Financial Bonds in Amount of NT$1.5 Billion

1. Date of board resolution: NA 2. Name: First Bank 2026 Series 1 Unsecured Subordinated Financial Bonds 3. Whether to issue bonds under a shelf registration: No 4. Total issuance amount: NT$1.5 billion 5. Par value per bond: NT$10 million 6. Issuance price: Issued at par 7. Issuance period: Issued on June 26, 2026, maturing on June 26, 2031 8. Coupon rate: Fixed rate, 1.74% per annum 9. Collateral: None 10. Use of proceeds: For social impact investment loans 11. Underwriting method: Entrustment of advisory sales consultant 12. Bond trustee: None 13. Underwriter or distributor: First Financial Securities, Yuanta Securities 14. Guarantor: None 15. Paying agent: First Bank business units 16. Certifying institution: None 17. Conversion into shares: Not applicable 18. Put option: Not applicable 19. Call option: Not applicable 20. Exchange/conversion reference date: Not applicable 21. Potential dilution: Not applicable 22. Reasonableness of capital raising after cash capital reduction: Not applicable 23. Other: Supplementary announcement to the board resolution of December 20, 2019.