Taigi Announcement: Acquisition of Private Placement Common Shares of CTCI Corporation

1. Name and nature of the target (for preferred shares, the agreed issuance conditions such as dividend rate should also be specified): Private placement common shares of CTCI Corporation (hereinafter referred to as CTCI) 2. Date of occurrence of the event: 2026/04/14 3. Quantity of transaction units, price per unit, and total transaction amount: Transaction quantity: 4,230,000 shares Price per share: NT$35.48 Total transaction amount: NT$150,080,400 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): Counterparty: CTCI Relationship with the company: Non-related party 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 be announced: Not applicable 6. If the owner of the transaction target has been a related party of the company within the last five years, the acquisition and disposal dates, prices, and the relationship with the company at the time of the transaction should be announced: Not applicable 7. Matters related to the disposal of claims (including the type of collateral attached to the claims, if the disposed claims belong to related party claims, the name of the related party and the book value of the claims against the related party should be announced): Not applicable 8. Disposal gain (or loss) (not applicable for acquisition of marketable securities) (deferred items should be listed and explained for recognition): Not applicable 9. Delivery or payment terms (including payment period and amount), contract restriction clauses, and other important agreed matters: Delivery or payment terms: Handled according to payment notice Other important agreed matters: The subscribed private placement securities and subsequently distributed securities, after three years from the delivery date of the private placement securities, CTCI may apply to the competent authority for supplementary public issuance and listing for trading. 10. Method of determining this transaction, reference basis for price determination, and decision-making unit: This transaction is based on the fixed price subscription of CTCI's private placement common shares. Handled according to the company's approval authority. 11. Net value per share of the target company for acquisition or disposal of marketable securities: 22.70 12. The difference between the reference price of the private placement marketable securities and the transaction amount per share is 20% or more: No 13. As of now, the cumulative number, amount, shareholding ratio, and restricted rights (such as pledge status) of this transaction's securities (including this transaction): Quantity: 20,876,570 shares Amount: NT$664,459,413 Shareholding ratio: 2.21% Restricted rights: The subscribed private placement securities and subsequently distributed securities, after three years from the delivery date of the private placement securities, CTCI may apply to the competent authority for supplementary public issuance and listing for trading. 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 most recent financial report, and the amount of working capital in the most recent financial report: Proportion of total assets: 2.77% Proportion of parent company equity: 3.79% Working capital amount: NT$324,472 thousand 15. Manager and brokerage fees: None 16. Specific purpose or use of acquisition or disposal: Strategic investment 17. Opinions of dissenting directors on this transaction: Not applicable 18. This transaction is a related party transaction: No 19. Date of board of directors' approval: Not applicable 20. Date of supervisors' approval or audit committee's consent: Not applicable 21. Accountant issued an unreasonable opinion on this transaction: Not applicable 22. Name of accounting firm: Not applicable 23. Name of accountant: Not applicable 24. Accountant's practice certificate number: Not applicable 25. Other matters to be specified: None Keywords: Material Information