POWERGRID declared as successful bidder under TBCB.

21st August, 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 to establish Inter-State Transmission System for the project namely “Transmission system for Integration of Power from RE Projects in Jam Khambhaliya REZ in Gujarat - Phase II (5500MW) and Jamnagar Phase-I (1000 MW)” on Build, Own, Operate and Transfer (BOOT) basis, at a discovered tariff of Rs. 822.91 crore per annum. The Letter of Intent (LoI) has been received by POWERGRID on 21st August, 2026. The project involves the establishment of a new GIS substation at Kalyanpur (Gujarat) along with ICT augmentation and bay extension works at under-construction substations in the state of Gujarat and the construction of a 765 kV transmission lines traversing the state of Gujarat. Thanking You, 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