Anthony Liu

- **ChipMOS TECHNOLOGIES INC.** announced a new share repurchase program on **September 2, 2025**, authorizing the repurchase of up to **15 million common shares**, which represents approximately **2.09%** of its issued share capital.  **[1123134_0001193125-25-193310_repurchase_shares_250902.htm:0]** **[1123134_0001193125-25-193310_imos-ex99_1.htm:0]** **[1123134_0001193125-25-193310_repurchase_shares_250902.htm:1]** 
- The repurchase program is scheduled to run from **September 3, 2025, to November 2, 2025**, with a maximum total amount of **NT$480 million** (approximately **US$15.7 million**) and a price range of **NT$16.80 to NT$32.00** per share.  **[1123134_0001193125-25-193310_imos-ex99_1.htm:0]** **[1123134_0001193125-25-193310_repurchase_shares_250902.htm:1]** 
- The purpose of the share repurchase is to **maintain the Company's credibility and shareholders' equity**, and the Board of Directors has declared that the repurchase will **not affect the maintenance of the Company's capital**.  **[1123134_0001193125-25-193310_repurchase_shares_250902.htm:0]** **[1123134_0001193125-25-193310_imos-ex99_1.htm:0]** **[1123134_0001193125-25-193310_repurchase_shares_250902.htm:1]**

CHIPMOS TECHNOLOGIES (IMOS)