Closure of Trading Window

30th July, 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.: Prior Intimation of Board Meeting of POWERGRID to consider and approve the Unaudited Financial Results for the first quarter ended 30th June, 2026 (FY 2026-27). Dear Sir, In terms of Regulation 29(1)(a) and 50(1)(c) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended, we wish to inform that meeting of Board of Directors of POWERGRID is scheduled to be held on Wednesday, 05th August, 2026 to consider and approve, amongst other items of Agenda, the Unaudited Financial Results of the Company for the first quarter ended 30th June, 2026 after these results are reviewed by the Audit Committee. Further, the ‘Trading Window’ of the Company, which has been closed from Wednesday, 24th June, 2026, shall remain closed till Friday, 07th August, 2026 and the 'Trading Window' will open on Saturday, 08th August, 2026. This is for your information and record please. Thanking You, Yours faithfully, (Anjana Luthra) Company Secretary & Compliance Officer 1. National Securities Depository Limited, 3rd Floor, Naman Chamber, Plot C-32, G-Block, Bandra Kurla Complex, Bandra East, Mumbai, Maharashtra - 400051. 2. Central Depository Services (India) Limited, Marathon Futurex, A-Wing, 25th floor, NM Joshi Marg, Lower Parel, Mumbai - 400013. 3. KFin Technologies Limited, Selenium Tower B, Plot 31-32, Gachibowli, Financial District, Nanakramguda, Hyderabad. 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