[Unimicron] Board Resolves to Issue Commitments for Subsidiary Suzhou Qunce's Overseas Listing

1. Board Resolution Date: 2026/05/22 2. Subsidiary to be listed on an overseas market: Suzhou Qunce Technology Co., Ltd. 3. Relationship and shareholding ratio: A subsidiary 90.44% owned by Unimicron. 4. Commitments regarding significant impact on finance, operations, or shareholder equity: (1) The subsidiary, Suzhou Qunce, intends to list on the Hong Kong Stock Exchange. Consequently, Unimicron and its related subsidiaries will sign and issue relevant documents to Chinese securities regulators, the Hong Kong Stock Exchange, and intermediaries. (2) The commitments have been evaluated by the Audit Committee and the Board and are deemed not to have any material impact on Unimicron or its related subsidiaries. 5. Commitment items issued by the company and its subsidiaries: [Principal documents to be signed by Unimicron] - Semi-finished Goods Procurement Framework Agreement - Equipment and Raw Material Procurement Framework Agreement - Deed of Non-Competition - Undertaking pursuant to Rule 10.07 of the Listing Rule - B2B Confirmation-Controlling Shareholders [Principal documents to be signed by Suzhou Qunce] - Various procurement framework agreements, deed of non-competition, Issuer's Undertaking (M103), and statements related to the application for 'Full Circulation' of H-shares. 6. Special Committee (or Audit Committee) meeting date: 2026/05/22 7. Other matters: (1) Regarding the 'Full Circulation' application, the company intends to convert 806,155,001 shares (55.13% of total shares) into H-shares. (2) During the audit review, some members expressed reservations, but after a supplemental explanation by counsel, the proposal was approved by all present directors.