Trading window of the Company shall remain closed from 1st October 2026 till 48 hours after the declaration of Financial Results for the quarter ending 30th September 2026.

Ref. No.: 01:SEC:LA:1 Dated: 22nd September 2026 BSE Limited National Stock Exchange of India Limited Department of Corporate Services, Listing Department, Floor 25, PJ Towers, Dalal Street, Exchange Plaza, Bandra-Kurla Complex, Bandra (E), Mumbai-400 001 Mumbai-400 051 Scrip Code: 532555 Symbol: NTPC ISIN: INE733E01010 Sub: Intimation regarding closure of Trading Window for Insiders Dear Sir/Madam, Pursuant to the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 and Clause 9 of the Code for Prevention of Insider Trading in the securities of NTPC, it is hereby informed that the Trading Window for dealing in the securities of the Company shall remain closed from 1st October 2026 untill 48 hours after the declaration of Financial Results for the quarter ending 30th September 2026. The date of the Board Meeting at which results would be considered shall be intimated in due course. This is for your information and records. Thanking you/ ध�वाद, Yours faithfully/ भवदीया, (Ritu Arora)/ (�रतु अरोड़ा) Company Secretary & Compliance Officer/ काप�रेट पहचान नम्बर : L40101DL1975GOI007966, टेल�फोन नं. : 011-24387333 फैक्स नं. : 011-24361018, ईमले : ntpccc@ntpc.co.in वेबसाइट: www.ntpc.co.in Registered Office: NTPC Bhawan, SCOPE Complex, 7 Institutional Area, Lodi Road, New Delhi – 110003 Corporate Identification Number: L40101DL1975GOI007966, Telephone No.: 011-24387333, Fax No.: 011-24361018, E-Mail: ntpccc@ntpc.co.in Website: www.ntpc.co.in