[Unimicron] Announcement of the Board's Resolution to Appoint Members of the 2nd ESG Committee

1. Date of change: May 29, 2026. 2. Committee: ESG Committee. 3. Former members: Chien Shan-chieh, Wang Sheng-yu, Chen Chang-fu, Lan Ting, Ma Kuang-hua, Wang Pai-wei, Chen Kuo-chao, Liao Pen-wei, Chung Ming-feng. 4. New members: Chien Shan-chieh, Lin Hung-yao (GM of ITE Tech), Wang Sheng-yu (Director of DT Research), Chu Wen-yi (Independent Director of Gigabyte), Lin Shui-hsien (Independent Director of Standard Foods), Sun Su-chiu (Senior Director of UMC). 5. Reason: Full re-election due to term expiration.