【Cathay Financial】Cathay Financial Holding announces on behalf of its subsidiary Cathay United Bank the board resolution to participate in the National Development Council's 'Enterprise Investment US Financing Guarantee Mechanism Promotion Plan'

1. Date of occurrence: 2026/06/08 (Note: year 115 in ROC calendar) 2. Company name: Cathay United Bank Co., Ltd. 3. Relationship with the company (please enter the company or subsidiary): Subsidiary 4. Mutual shareholding ratio: 100% 5. Reason for occurrence: Participation in the National Development Council's 'Enterprise Investment US Financing Guarantee Mechanism Promotion Plan.' The contribution amount does not exceed USD 25 million equivalent in New Taiwan Dollars. 6. Countermeasures: Not applicable 7. Other matters to be stated (if the subject of the event or resolution is a publicly issued company or above, this material information also meets the criteria under Article 7, Paragraph 9 of the Securities and Exchange Act Enforcement Rules for matters that have a material impact on shareholders' equity or securities prices): (1) Cooperate with the government's policy to support enterprises investing in the US, promoting business development. (2) By participating in this mechanism, the Bank can obtain financing guarantees to reduce credit risk. In the event of claims, the Bank and the National Development Fund will share losses proportionally according to their respective contributions. If the total contributions (i.e., the sum of the Bank's and the National Development Fund's contributions) are insufficient to cover claims, they will also be shared proportionally. (3) The actual content shall be subject to the formally signed contract.