[GUC] Announcement of Board of Directors Election at the 2026 Annual General Meeting

1. Date of change: May 21, 2026 (115/05/21) 2. Type of personnel: Corporate Director, Independent Director 3. Names of outgoing directors: Corporate Director: F.C. Tseng Corporate Director: Lisa Chang Corporate Director: S.Y. Tai Corporate Director: Wendell Huang Independent Director: L.F. Chin Independent Director: Y.K. Ting Independent Director: C.H. Huang Independent Director: H.M. Chen 4. Names of incoming directors: Corporate Director: Lisa Chang Corporate Director: S.Y. Tai Corporate Director: Wendell Huang Corporate Director: Li-Zhong Lu Independent Director: L.F. Chin Independent Director: Y.K. Ting Independent Director: C.H. Huang Independent Director: H.M. Chen Independent Director: Chao-Hung Chen 5. Background of new directors: Dr. Li-Zhong Lu holds a PhD in Computer Science from Yale and serves as VP of R&D/Design and Technology Platform at TSMC. Dr. Chao-Hung Chen holds a PhD in Law from the University of London and is an associate professor at National Taiwan University. 6. Reason for change: General election due to expiration of term. 7. Effective date: May 21, 2026.