[CTBC Financial Holding] Announcement by Subsidiary CTBC Capital Co., Ltd. Regarding Investment in Taiwan Innovation Technology Limited Partnership (Tentative Name) (Supplement to April 27, 2026 Announcement)

1. Name and nature of the target (for preferred shares, issuance conditions such as dividend rates should also be specified): Taiwan Innovation Technology Limited Partnership (tentative name); Private Equity Fund 2. Date of occurrence of the event: 2026/04/28 3. Quantity of trading units, price per unit, and total trading amount: Not applicable, not applicable, not exceeding NT$1,000,000 4. Counterparty of the transaction and its relationship with the company (if the counterparty is a natural person and not a related party of the company, their name may be omitted): CTBC Capital Co., Ltd. intends to jointly serve as a general partner of the private equity fund with other parties. 5. If the counterparty is a related party, the reason for selecting the related party as the transaction object, the previous owner, the relationship between the previous owner and the company and the counterparty, the previous transfer date, and the transfer amount should also be announced: Reason for selecting a related party as the transaction object: to obtain good investment returns Previous owner, relationship between the previous owner and the company and the counterparty, previous transfer date, and transfer amount: Not applicable 6. If the owner of the trading target has been a related party of the company within the past five years, the acquisition and disposal dates, prices, and relationship with the company at the time of the transaction should also be announced: Not applicable 7. Matters related to the disposal of receivables (including the type of collateral attached to the receivables, and if the receivables belong to a related party, the name of the related party and the book value of the related party's receivables disposed of this time should also be announced): Not applicable 8. Disposal gain (or loss) (not applicable to the acquisition of marketable securities) (for deferred items, a list should be provided to explain the recognition status): Not applicable 9. Delivery or payment terms (including payment period and amount), contract restrictions, and other important agreements: Handled in accordance with contract provisions. 10. Method of determining this transaction, reference basis for price determination, and decision-making unit: Method of determining this transaction, reference basis for price determination: Handled in accordance with contract provisions. Decision-making unit: Board of Directors 11. Net value per share of the target company for the acquisition or disposal of marketable securities: Not applicable 12. The difference between the private placement reference price and the transaction amount per share of the marketable securities target company reaches 20% or more: Not applicable 13. As of now, the cumulative number, amount, shareholding ratio, and restricted rights (such as pledges) of these traded securities (including this transaction) held: Parent company (CTBC Financial Holding Co.): Does not hold these traded securities; Parent company (CTBC Venture Capital): Does not hold these traded securities; CTBC Capital Co., Ltd.: Not applicable, not exceeding NT$1,000,000, expected to be 0.013%-0.0167% of the final fundraising scale, none. 14. As of now, the proportion of private placement marketable securities investment (including this transaction) to the total assets and equity attributable to owners of the parent company in the company's latest financial report, and the working capital amount in the latest financial report: Proportion of total assets: 0.01997%, proportion of equity attributable to owners of the parent company: 0.02476%, Working capital: Not applicable 15. Managers and brokerage fees: Not applicable 16. Specific purpose or use of acquisition or disposal: Long-term investment 17. Opinions of dissenting directors on this transaction: None 18. This transaction is a related party transaction: Yes 19. Date of board approval: April 27, 2026 (Republic of China calendar) 20. Date of approval by supervisors or audit committee: Not applicable, the company has no supervisors. 21. Accountant's opinion on this transaction being unreasonable: No 22. Name of accounting firm: Chuan Hsing CPA Firm 23. Name of accountant: Chu Chien-Chou 24. Accountant's practice certificate number: Taiwan Financial Securities Registration (6) No. 4147 25. Other matters to be specified: None Keywords: Material Information