Unimicron (3037) Board Approves Hong Kong IPO Plan for Subsidiary Suzhou Group-Sense Technology

Announcement Date: 2026/05/24 Stock Code: 3037 Company Name: Unimicron

Subject: Board resolution regarding commitments for the offshore listing of subsidiary Suzhou Group-Sense Technology Co., Ltd.

Details: 1. Board Date: 2026/05/22 2. Subsidiary to be listed: Suzhou Group-Sense Technology Co., Ltd. 3. Relationship: 90.44% owned subsidiary. 4. Materiality: The subsidiary intends to apply for listing on the Main Board of the Stock Exchange of Hong Kong Limited (HKEX). Accordingly, the Company and relevant subsidiaries will submit documents containing commitments to Chinese securities regulators, the HKEX, and intermediaries. The Audit Committee and the Board have assessed that this will have no material adverse impact on the Company's financial, operational, or shareholder interests. 5. Commitments: - 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 Rules, and Controlling Shareholders' Confirmation. - Indirect Controlling Shareholders: Various commitments including Deed of Non-Competition and Undertaking pursuant to Rule 10.07. - Suzhou Group-Sense: Various commitments including Issuer's Undertaking (M103), listing filings, Rule 10.08 undertaking, and explanations regarding H-share 'Full Circulation'. 6. Audit Committee Date: 2026/05/22 7. Other Details: - Unimicron holds 1,322,543,031 shares of Suzhou Group-Sense (90.44%). Of these, 806,155,001 shares (55.13%) are planned for 'Full Circulation' in Hong Kong. - Following clarifications from legal counsel, the proposal was unanimously approved by the attending directors.