[Union Bank] Announces Information on Self-Audited Earnings for April 115 (2026)

1. Date of occurrence of the event: 115/05/06 2. Company name: Union Bank of Taiwan 3. Relationship with the company (please enter 'this company' or 'subsidiary'): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Voluntary announcement of self-audited earnings

April Earnings Cumulative Earnings Item ------------------------ --------------------------- Pre-tax After-tax Pre-tax After-tax ------------------ ----------- ----------- ------------- ------------ Attributable to owners of parent (in thousands of NTD) 736,518 606,342 2,525,651 2,084,740 Non-controlling interests (in thousands of NTD) 60 60 67 67 Consolidated net profit (in thousands of NTD) 736,578 606,402 2,525,718 2,084,807 Earnings per share (TWD) 0.17 0.14 0.58 0.48 Note: All above figures are self-audited and have not been audited or reviewed by an accountant. 6. Countermeasures: None. 7. Other matters that need to be specified (If the entity involved in the event or resolution is a publicly issued company or above, this major announcement also complies with Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act regarding matters that have a material impact on shareholders' equity or securities prices): (1) The overdue loan ratio at the end of April was 0.27%; the loan loss coverage ratio was 472.04%. (2) The consolidated pre-tax profit accumulated up to April of this year increased by 28.49% compared to the same period last year.