WT Microelectronics (3036) Approves Issuance of Second Overseas Unsecured Convertible Bond

Reporting Date: May 23, 2026 Announcement Date: May 22, 2026 Announcement Time: 18:14:09 Company Code: 3036 Company Name: WT Microelectronics Subject: Board resolution to issue the second overseas unsecured convertible bond Compliance Clause: Clause 11 Date of Event: May 22, 2026

Explanation: 1. Date of Board Resolution: May 22, 2026 2. Name: WT Microelectronics Corporation Second Overseas Unsecured Convertible Bond 3. Whether Shelf Registration is Adopted: No 4. Total Issuance Amount: Up to 500 million USD (including over-allotment option). The bond will be converted into NTD at a fixed exchange rate for repayment and redemption. 5. Face Value per Bond: Tentatively 200,000 USD or multiples thereof. 6. Issue Price: Tentatively 100% of the face value. 7. Maturity: Fixed term not exceeding 2 years from the date of issuance. 8. Interest Rate: Coupon rate tentatively set at 0% per annum. 9. Collateral: Not applicable. 10. Purpose of Funds: To fulfill capital requirements for foreign currency raw material purchases. 11. Underwriting Method: The bond will be issued outside the Republic of China and offered publicly in accordance with the laws of the target countries and international market standards. 12. Trustee: Citicorp International Limited 13. Underwriters: International Lead Manager: Citigroup Global Markets Limited; Domestic Lead Manager: Yuanta Securities Co., Ltd. 14. Guarantor: Not applicable. 15. Paying Agent: Citibank, N.A., London Branch 16. Certification Institution: Not applicable. 17. Conversion Terms: Authorized to the Chairman and/or their designated person. 18. Put Options: Authorized to the Chairman and/or their designated person. 19. Call Options: Authorized to the Chairman and/or their designated person. 20. Conversion Basis Date: Authorized to the Chairman and/or their designated person. 21. Dilution Impact: Depends on the conversion premium at the time of actual issuance. 22. Other: Matters such as total amount, conversion price, usage plan, and scheduling are subject to authorization by the Chairman or designated persons in case of regulatory or market changes.