[Yageo] Announcement on behalf of subsidiary Chilisin Holding (Hong Kong) Limited regarding capital injection into its subsidiary Chilisin Electronics (Vietnam) Co., Ltd.

1. Name and nature of the subject matter: Cash capital increase of subsidiary Chilisin Electronics (Vietnam) Co., Ltd. 2. Date of occurrence of the event: 2026/04/22~2026/04/22 3. Date of Board of Directors' approval: April 22, 2026 4. Date of other approval authority: Not applicable 5. Transaction volume, unit price, and total transaction amount: USD 35,000,000 6. Counterparty and its relationship to the Company: Subsidiary 7. If the counterparty is a related party, reason for choosing the related party as counterparty, and previous transfer details: Subsidiary; Cash capital increase for Chilisin Electronics (Vietnam) Co., Ltd.; Not applicable 8. If the owner of the subject matter within the past five years was a related party: Not applicable 9. Matters related to disposal of receivables: Not applicable 10. Profit (or loss) from disposal: Not applicable 11. Terms of delivery or payment: Remitted based on capital needs 12. Method of determining this transaction: Board of Directors' resolution 13. Net worth per share of the acquired or disposed company: Not applicable 14. Cumulative holding amount: Approx. USD 144,000,000; Holding ratio: 100%; Restriction on rights: None 15. Ratio of securities investment to total assets: 1.28%; Ratio to equity attributable to owners of parent: 2.76%; Operating capital in most recent financial statements: TWD -76,476,038 thousands 16. Broker and brokerage fee: Not applicable 17. Specific purpose of acquisition or disposal: Long-term investment 18. Dissenting directors' opinions: None 19. Whether the transaction is a related party transaction: Yes 20~24. Accountant details: Not applicable 25. Whether it involves a change in business model: No 26~29. Other details: Not applicable 30. Other matters to be specified: None