Intimation of Closure of Trading Window from 1st October 2026 onwards for the Unaudited Financial Results for the quarter and half year ending 30th September 2026

Ref No. GIL/CFD/SEC/27/106/SE 24th September 2026 BSE Limited National Stock Exchange of India Limited Scrip Code: 500300 Symbol: GRASIM Dear Sir/Madam, Sub: Intimation of Closure of Trading Window from 1st October 2026 onwards for the Unaudited Financial Results for the quarter and half year ending 30th September 2026 In terms of the provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Code of Conduct to Regulate, Monitor and Report trading by Designated Persons in Listed or proposed to be Listed Securities of the Company (‘the Code’), the ‘Trading Window’ for dealing in the securities of the Company will be closed for all Designated Persons and their immediate relatives under the Code from 1st October 2026 and the same will remain closed/shut until 48 hours after the Unaudited Financial Results for the quarter and half year ending 30th September 2026 of the Company are declared and disseminated to the Stock Exchanges. The date of Board meeting for the aforesaid purpose will be notified and uploaded on the website of the Company, in due course. Accordingly, all Designated Persons and their immediate relatives under the Code have been advised not to trade in the securities of the Company during the aforesaid period of closure of Trading Window. Thanking you, Yours sincerely, For Grasim Industries Limited Neelabja Chakrabarty Company Secretary and Compliance Officer ACS – 16075 Luxembourg Stock Exchange Citi Bank N.A. Citi Bank N.A. 35A Boulevard Joseph II Depositary Receipt Services Custodial Services L-1840 Luxembourg 390 Greenwich Street, FIFC, 9th Floor, C-54 & 55, 4th Floor, New York, G Block, Bandra Kurla NY 10013 Complex, Bandra (East), Mumbai 400 051 Grasim Industries Limited Aditya Birla Centre, ‘A’ wing, 2nd Floor, S.K. Ahire Marg, Worli, Mumbai 400 030, India T: +91 22 6652 5000 / 2499 5000 | F: +91 22 6652 5114 / 2499 5114 E: grasim.secretarial@adityabirla.com | W: www.grasim.com | CIN: L17124MP1947PLC000410 Regd. Office : P.O. Birlagram, Nagda – 456 331 (M.P.)