Trading Window Closure for the quarter and half year ended September 30, 2026

Ref: MGL/CS/SE/2026/726 Date: September 22, 2026 Head, Listing Compliance Department Head, Listing Compliance Department BSE Limited National Stock Exchange of India Limited P. J. Towers, Exchange Plaza, Bandra – Kurla Complex, Dalal Street, Bandra (East), Mumbai – 400 001 Mumbai – 400 051 Scrip Code: 539957 Symbol: MGL Dear Sir / Madam, Sub: Intimation of Closure of Trading Window We wish to inform that as per the Company’s Code of Conduct to Regulate, Monitor and Report Trading by Designated Persons and their immediate relatives and Code of Practice and Procedures for Fair Disclosure of Unpublished Price Sensitive Information adopted by its Board of Directors pursuant to SEBI (Prohibition of Insider Trading) Regulations, 2015, the trading window for trading in the securities of the Company shall be closed from October 01, 2026 till 48 hours after declaration of the Unaudited Standalone and Consolidated Financial Results of the Company for the quarter and half year ended September 30, 2026 to the stock exchanges. You are requested to take the above information on your records. Thanking You, Yours Sincerely, For Mahanagar Gas Limited Atul Prabhu Company Secretary & Compliance Officer Regd. Office: MGL House, Block G-33, Bandra - Kurla Complex, Bandra (East), Mumbai - 400 051 T + 91 22 6678 5000 | E info@mahanagargas.com | W www.mahanagargas.com | CIN L40200MH1995PLC088133 An ISO 9001, 14001 & 45001 Certified Company