Sili Microelectronics (2342) Appoints 7th Audit Committee Members

Announcement Date: 2026-05-21 Effective Date: 2026-05-20 Company Code: 2342 Company Name: Sili Microelectronics

Subject: Announcement of the newly appointed 7th Audit Committee members.

Details: 1. Date of change: 2026-05-20 2. Committee Name: Audit Committee 3. Outgoing members: Xie Shaowen, Lin Qingxiang, Liu Zhentu, Lan Chongwen 4. Incoming members: Lin Qingxiang, Lan Chongwen, Zhang Shuru, Lu Zhaoxiang

Brief profiles of new members: - Lin Qingxiang: Consultant, Industrial Technology Research Institute (ITRI) - Lan Chongwen: Lifetime Distinguished Professor, Dept. of Chemical Engineering, National Taiwan University - Zhang Shuru: Independent Director, Tongtai Electronic Technology - Lu Zhaoxiang: Director and General Manager, Powertech Technology Inc. (PTI)

Reason for change: Expiration of term. Effective date of new appointment: 2026-05-20.