[CTBC] Announcement on behalf of Japanese subsidiary The Tokyo Star Bank, Limited regarding APVIII PE fund investment

1. Name and nature of the underlying asset: APVIII; PE fund 2. Date of occurrence: 2026/05/15 3. Transaction volume, unit price, and total transaction amount: 3 shares, JPY 100,000,000 per share, JPY 300,000,000 (commitment) 4. Counterparty and its relationship with the Company: APVIII; Non-related party 5. Where the counterparty is a related party, reasons for choosing them and details of previous transfers: Not applicable 6. Where the owner of the subject matter within the past five years was a related party of the Company, details of acquisition/disposal dates and prices: Not applicable 7. Matters related to the disposal of claims: Not applicable 8. Profit (or loss) from disposal: Not applicable 9. Delivery or payment conditions, restrictive covenants, and other important stipulations: Handled in accordance with the contract. 10. Method of determining the transaction, reference basis for price determination, and decision-making unit: Handled in accordance with the contract. Credit Risk Committee of The Tokyo Star Bank, Limited. 11. Net worth per share of the subject company: Not applicable 12. Difference of 20% or more between reference price and transaction amount per share: Not applicable 13. Cumulative holding of this security (including this transaction), amount, shareholding ratio, and restrictions on rights: 3 shares, JPY 300,000,000, 0.2%. Restrictions on rights (e.g., pledge): Not applicable 14. Ratio of total private placement securities investment (including this transaction) to total assets and equity attributable to owners of the parent, and operating capital: Ratio to total assets: 0.131%, Ratio to equity attributable to owners of the parent: 1.962%. Operating capital: Not applicable. 15. Broker and brokerage fee: Not applicable 16. Concrete purpose or use of the acquisition or disposal: Investment purposes 17. Opinions of dissenting directors: Not applicable 18. Is this transaction a related party transaction: No 19. Date of board of directors approval: Not applicable 20. Date of supervisor or audit committee approval: Not applicable 21. Did the CPA issue an unreasonable opinion: Not applicable 22. Name of CPA firm: Not applicable 23. Name of CPA: Not applicable 24. CPA certificate number: Not applicable 25. Other matters to be specified: JPY/TWD=0.1996 as of 2026/05/14