[WT Microelectronics] Board of Directors Approves Cash Capital Increase via GDR Issuance

1. Date of Board Resolution: May 22, 2026 2. Source of Capital: Cash capital increase through the issuance of common shares for Global Depositary Receipts (GDRs) (hereinafter referred to as "the Case"). 3. Shelf Registration: No. 4. Total Issue Amount and Shares: The provisional number of shares to be issued is 75,000,000 to 100,000,000 shares. The Chairman is authorized to determine the final amount based on market conditions. The total issue amount will be calculated based on the actual units of GDRs, price, and the exchange rate of NTD to USD on the pricing date. 5. Shelf Registration for this issue: Not applicable. 6. Remaining amount/shares: Not applicable. 7. Par value per share: 10 New Taiwan Dollars (NTD). 8. Issuance Price: Provisionally not lower than 90% of the closing price or average closing price of the common shares prior to the pricing date. The actual price will be determined by the Chairman in consultation with the securities underwriters, following international practices and domestic share prices. 9. Employee subscription: In accordance with Article 267 of the Company Act, 10% of the total new shares issued are reserved for subscription by employees of the company and its subsidiaries. 10. Public Offering: Excluding the 10% reserved for employees, the remaining 90% will be publicly offered through the issuance of GDRs. 11. Shareholder subscription: Not applicable. 12. Handling of fractional shares/unclaimed shares: The Chairman is authorized to nominate specific persons for subscription or include them in the public GDR offering. 13. Rights and obligations: Same as existing common shares of the company. 14. Use of funds: To fund foreign currency material purchases and repay foreign currency bank loans. 15. Other notes: The Chairman and/or their designated person(s) are authorized to handle all matters related to the issue, including underwriting method, pricing, conditions, and project schedule. Foreign Lead Underwriter: Citigroup Global Markets Limited.