【THSRC】Announcement Regarding the 2nd Phase Procurement for Core Power System Control and Relay (CRP) Equipment Update Project

1. Name and nature of the subject matter: Core System Power Equipment Control and Relay (CRP) Equipment Update Project Phase II 2. Date of occurrence: 2026/06/17 3. Date of Board approval: June 17, 2026 5. Total transaction amount: Approx. NT$3,293,132,714 (tax included) 6. Counterparty: Taiwan Toshiba Electronics Components Corp., not a related party to the company. 10. Payment terms: According to contract provisions. 11. Decision method: Inquiries and negotiations conducted in accordance with internal corporate procedures. 23. Purpose: Replacement and update of control and relay panel equipment and upgrade of software/hardware to improve system performance and reduce troubleshooting time for power systems.