First Financial Holding Announces May 2026 Consolidated Earnings for Itself and Major Subsidiaries

1. Date of Event: 115/06/12 2. Company Name: First Financial Holding Co., Ltd. 3. Relationship with Company (enter '本公司' or 'Subsidiary'):本公司 4. Cross-shareholding Ratio: 100% 5. Reason for Occurrence: Same as subject 6. Response Measures: None 7. Other Matters to be Disclosed (If the entity making the announcement or resolution is a publicly issued company or above, this major information simultaneously qualifies as a matter under Article 7, Paragraph 9, Item 9 of the Enforcement Rules of the Securities and Exchange Act that significantly affects shareholders' rights or securities prices):

------------- Monthly Consolidated Profit Cumulative Consolidated Profit Cumulative EPS ------------- Pre-tax After-tax Pre-tax After-tax After-tax Unit (Billion NT$) (Billion NT$) (Billion NT$) (Billion NT$) (NT$) ---------------------------------------------------------------------------------------- First Financial Holding 39.46 34.00 178.69 148.01 1.03 First Bank 32.61 27.72 156.99 129.38 1.05 First Securities 3.35 3.03 13.08 11.20 1.67 First Life Insurance 1.11 1.00 4.22 3.51 0.51 ----------------------------------------------------------------------------------------

Note: Cumulative EPS (NT$) from January to May excluding foreign exchange valuation reserve First Financial Holding: 1.03 First Life Insurance: 0.63