March 31, 2025 Unit: Shares; % Names of Major Shareholders Shareholding Spouse and minor children Shareholding when elected or appointed Shareholding in the name of others in total Specify the name of the entity or person and their relationship to any of the other top 10 shareholders with which the person is a related party or has a relationship of spouse or relative within the 2nd degree Remark Number of shares Shareholding ratio Number of shares Shareholding ratio Number of shares Shareholding ratio Name Relationship HIWIN Investment Corporation Representative: Wen-Heng Chou 28,829,898 8.15% - - - - Eddie Chuo Chairman None 6,845,702 1.93% 420,676 0.11% - - Eric Y.T. Chuo Director Labor Pension Fund, New System 14,660,215 4.14% Not Applicable HSBC Bank (Taiwan) Limited entrusted with custody of Fidelity Advisor Series VIII: Fidelity Advisor focuses on Emerging Markets Fund Investment Account 11,697,660 3.31% Not Applicable Eric Y.T. Chuo 10,990,759 3.11% 1,300,320 0.36% - - Eddie Chuo Father and son Shun-Chin Lee 8,618,011 2.44% 107,957 0.03% - - First Bank Trust-Fund Account Appointed by Shun-Chin Lee - Nanshan Life Insurance Co., Ltd. Representative: Yin Chong-Yao 6,862,355 1.94% Not Applicable Information not available Eddie Chuo 6,845,702 1.93% 420,676 0.11% - - Eric Y.T. Chuo Father and son Norges Bank Investment Account under custody of Citibank (Taiwan) 6,525,815 1.84% Not Applicable Deutsche Bank Taipei Branch in custody for Fidelity Emerging Markets Fund Investment Account 6,082,520 1.72% Not Applicable First Bank Trust-Fund Account Appointed by Shun-Chin Lee 6,000,000 1.70% Not Applicable Shun-Chin Lee -