Trading Window

Date: 24th June, 2026 To, To, The Listing Department, The Listing Department, National Stock Exchange of India Limited BSE Limited Exchange Plaza, 5th Floor, 1st Floor, New Trading Ring, Plot No. C/1, G Block, Rotunda Building, Bandra - Kurla Complex, Phiroze Jeejeebhoy Towers, Bandra (East), Mumbai - 400051 Dalal Street, Mumbai - 400001 NSE Code: GAMMONIND BSE Code: 509550 Dear Sir / Madam, Sub: Closure of Trading Window This is to inform you that pursuant to Clause 4 of Schedule B of SEBI (Prohibition of Insider Trading) Regulations 2015 read with circular nos. NSE/CML/2019/11 and LIST/COMP/01/2019-20 both dated 2nd April, 2019 issued by the National Stock Exchange of India Limited and Bombay Stock Exchange Limited respectively, the trading window of the Company shall remain closed with effect from 1st July, 2026 until expiry of 48 hours after the declaration of financial results for the quarter ended 30th June, 2026. Kindly take the same on record. Thanking you, Yours faithfully, For Gammon India Limited Roshni Kapshiwal Company Secretary and Compliance Officer Membership Number: A73894 Date: 24th June, 2026 Place: Mumbai GAMMON INDIA LIMITED Registered Office: Floor 3rd，Plot - 3/8, Hamilton House, J. N. Heredia Marg, Ballard Estate, Mumbai - 400 038. Maharashtra, India; Telephone: +91-22-2270 5562 E-Mail: investors@gammonindia.com Website: www.gammonindia.com CIN: L74999MH1922PLC000997