Marketech International Corp. Announces an Additional Investment of TWD 300 Million (USD 34 Million) in its Subsidiary, Marketech International Corporation USA

1. Name and nature of the subject matter (for preferred shares, issuance conditions such as dividend rate should also be specified): Common shares of subsidiary Marketech International Corporation USA 2. Date of occurrence of the event: 115/5/5~115/5/5 3. Date of board of directors' resolution: May 5, Republic of China (R.O.C.) 115 (2026) 4. Other approval dates: Not applicable 5. Quantity, unit price, and total transaction amount: Proposed additional investment of USD 34,000,000 on 115/5/5 6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party of the company, disclosure of their name may be omitted): Counterparty: Marketech International Corporation USA Relationship with the company: A 100% directly invested subsidiary of the company 7. 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 transfer amount shall also be disclosed: Reason for selecting the related party as the transaction object: Marketech International Corporation USA is a 100% directly invested subsidiary of the company. 8. If the subject matter of the transaction has been owned by 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 for the related party should also be disclosed: Not applicable 9. Matters related to the disposal of receivables (including the type of collateral attached to the receivables, and if the disposed receivables belong to related party receivables, the name of the related party and the book value of the disposed receivables of that related party shall also be disclosed): Not applicable 10. Disposal gain (or loss) (not applicable for acquisition of securities) (if deferred, recognition status should be listed and explained): Not applicable 11. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: To be handled in accordance with the resolution of the board of directors 12. Method of determining this transaction, reference basis for price determination, and decision-making unit: To be handled in accordance with the resolution of the board of directors 13. Net value per share of the acquired or disposed securities target company: Not applicable 14. As of now, the quantity, amount, shareholding ratio, and restrictions on rights (e.g., pledge status) of cumulative holdings of these securities (including this transaction): Cumulative investment amount (including this investment): USD 67,450,000 Shareholding ratio (including this investment): 100% Restrictions on rights: None 15. As of now, the ratio of investment in securities listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" (including this transaction) to the company's most recent financial report's total assets and owners' equity attributable to the parent company, and the amount of working capital in the most recent financial report (Note 2): Ratio of long-term and short-term securities investment to total assets: 11.93% Ratio of long-term and short-term securities investment to owners' equity attributable to the parent company: 28.61% Working capital in the most recent financial report: TWD 6,549,102 thousand 16. Broker and brokerage fees: Not applicable 17. Specific purpose or use of acquisition or disposal: To replenish the operating funds of the subsidiary 18. Opinions of dissenting directors on this transaction: None 19. This transaction is a related party transaction: Yes 20. Date of approval by supervisors or audit committee: May 4, R.O.C. 115 (2026) 21. Accountant's non-reasonable opinion on this transaction: Not applicable 22. Name of accounting firm: Not applicable 23. Accountant's name: Not applicable 24. Accountant's practicing certificate number: Not applicable 25. Does it involve changes in operating model: No 26. Explanation of changes in operating model: (Blank) 27. Transaction status with the counterparty in the past year and expected in the next year: Not applicable 28. Source of funds: Own funds 29. Date of previous material information announcement on the same event: Not applicable 30. Other matters to be specified: None