[Capital Securities] Announcement of the Company's Consolidated Self-Assessed Profit and Loss for May 2026

1. Date of occurrence: 2026/06/08 2. Company name: Capital Securities Corporation 3. Relationship with the company (please enter the company or subsidiary): The company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: Announcement of the company's consolidated self-assessed profit and loss for May 2026: (1) Pre-tax net profit for May: NT$2,250,315 thousand, EPS NT$0.98. (2) After-tax net profit for May: NT$2,002,986 thousand, EPS NT$0.88. (3) Cumulative pre-tax net profit for January to May: NT$8,277,309 thousand, EPS NT$3.57. (4) Cumulative after-tax net profit for January to May: NT$7,492,481 thousand, EPS NT$3.28. 6. Countermeasures: None 7. Other matters to be noted (if the event or resolution subject is a public company, this material information also complies with Article 7, Paragraph 9 of the Securities and Exchange Act Enforcement Rules, which has a material impact on shareholders' rights or securities prices): The above profit and loss figures are self-assessed by the company and have not yet been audited or reviewed by a certified public accountant.