Closure of Trading window for consideration and approval of unaudited standalone and consolidated financial results for the quarter ending September 30, 2026

September 25, 2026 BSE Limited National Stock Exchange of India Limited Luxembourg Stock Exchange Scrip Code: 500440 Scrip Code: HINDALCO Scrip Code: US4330641022 Sub: Intimation of meeting of the Board of Directors and Closure of ‘Trading Window’. Ref: a. Regulation 29 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015; b. Schedule B of the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 along with the Company’s Code of Conduct [“Code”] in connection thereto. c. ISIN: INE038A01020. Please be informed of the following: a. Board Meeting: A meeting of the Board of Directors of the Company will be held on Friday, November 6, 2026, inter alia to consider and approve the Unaudited Standalone and Consolidated financial results of the Company for the quarter ending September 30, 2026 [“said results”]. b. Trading Window: In view of the consideration and approval of the said results, ‘Trading Window’ for dealing in securities of the Company shall remain closed from Thursday, October 1, 2026, and will re-open on Monday, November 9, 2026. The above has been duly communicated to all the Designated Persons under the Code. c. Earnings Conference Call: The Company will hold the Earnings Conference Call to discuss the said results. Details of the Call will be intimated in due course. The above information is available on the website of the Company i.e. www.hindalco.com Sincerely, Hindalco Industries Limited Geetika Anand Company Secretary & Compliance Officer Hindalco Industries Limited Registered Office: 21st Floor, One Unity Center, Senapati Bapat Marg, Prabhadevi, Mumbai – 400013, India |T: +91 22 69477000 / 69477150 I F: +91 2269477001/69477090 W: www.hindalco.com |E: hilinvestors@adityabirla.com | Corporate ID No.: L27020MH1958PLC011238