[Sercomm] Announcement of the Board's Resolution to Appoint Members of the 3rd Sustainability Committee

1. Date of change: 2026/05/27 2. Name of functional committee: Sustainability Committee 3. Names of former members: Director Tseng Chao-Peng, Director Liu Tsung-Pao, Independent Director Li Ying-Chen 4. Resumes of former members: Tseng Chao-Peng (Director and President of Sercomm), Liu Tsung-Pao (Director and Executive Vice President of Sercomm), Li Ying-Chen (Chairman of IBASE Technology) 5. Names of new members: Director Tseng Chao-Peng, Director Liu Tsung-Pao, Independent Director Hsieh Yung-Ta 6. Resumes of new members: Tseng Chao-Peng (Director and President of Sercomm), Liu Tsung-Pao (Director and Executive Vice President of Sercomm), Hsieh Yung-Ta (Director and CEO of Powertech Technology Inc.) 7. Circumstances of change: Expiration of term 8. Reason for change: Expiration of term, re-appointment by the Board of Directors 9. Original term: 2023/06/15 ~ 2026/06/14 10. Effective date of new appointment: 2026/05/27 11. Other matters to be stated: None