POWERGRID declared as successful bidder under TBCB.

26th September, 2026 To To The General Manager (Listing), The General Manager (Listing), National Stock Exchange of India Limited, BSE Limited, Exchange Plaza, C 1/G Block, Phiroze Jeejeebhoy Towers, Bandra-Kurla Complex, Dalal Street, Mumbai. Bandra (East), Mumbai. Reference: NSE-SCRIP ID: POWERGRID; BSE Scrip Code: 532898 EQ – ISIN: INE752E01010 Sub.: POWERGRID declared as successful bidder under TBCB Dear Sir, In terms of Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended, this is to inform that Power Grid Corporation of India Limited (“POWERGRID”) has been declared as successful bidder under Tariff Based Competitive Bidding (“TBCB”) to establish Inter-State Transmission System for the project namely “Common Transmission System for evacuation of power from Lakadia (Phase-II: 7.5GW), Jam Khambhaliya (Phase-II: 5.5GW) and Jamnagar (Phase-I: 1GW) - Part-C” on Build, Own, Operate and Transfer (BOOT) basis, at quoted Annual Transmission Charges of Rs. 430.67 Crore. The Letter of Intent (LoI) has been received by POWERGRID on 25th September 2026. The project comprises establishment of new 765/400/220 kV Alephata Sub-station in the state of Maharashtra. Further, the project also involves construction of 765 kV and 400 kV transmission lines traversing through the state of Maharashtra along with the associated equipment’s and bays. With this project, POWERGRID has secured nine (09) transmission system projects under TBCB in FY 2026-27 till date, with cumulative Annual Transmission Charges of Rs. 7,664.08 Crore. Yours faithfully, (Anjana Luthra) Company Secretary & Compliance Officer Corporate Office: “Saudamini”, Plot No. 2, Sector-29, Gurugram-122001, (Haryana) Tel.: 0124-2822999 & 2822000 Registered Office: B-9, Qutab Institutional Area, Katwaria Sarai, New Delhi-110 016. Tel: 011-26560112, 26560115 & 26560193, CIN : L40101DL1989GOI0381 21 Website: www.powergrid.in