Update on Acquisition

August 7, 2026 BSE Limited National Stock Exchange of India Limited Luxembourg Stock Exchange Scrip Code: 500440 Scrip Code: HINDALCO Scrip Code: US4330641022 Sub: Fifth Update: Acquisition of AluChem Companies, Inc. by Aditya Holdings LLC, a step-down wholly owned subsidiary of Hindalco Industries Limited. Ref: a. Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015; b. SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 [“SEBI Circular”]; c. ISIN: INE038A01020 and d. Our Intimations dated June 24, 2025, October 23, 2025, February 11, 2026 , February 26, 2026 and May 20, 2026. We wish to refer to our earlier intimations regarding the filing of a ‘short-form’ and subsequently, a ‘long-form’ declaration with the Committee on Foreign Investment in the United States [“CFIUS”] in connection with the proposed acquisition of AluChem Companies, Inc. In this regard, please be informed that due to partial shutdown of the U.S. federal government, the statutory timelines under the CFIUS review framework were tolled, thereby impacting the ongoing CFIUS review process. The matter, however, is progressing and is anticipated to reach finality by September 2, 2026. This timeline remains subject to receipt of final clearance. We will provide further updates as and when material developments occur or upon completion of the review process. All other details, as per our referred intimations, remain unchanged. You are requested to kindly take the aforesaid information on record. This is also made available on the website of the Company www.hindalco.com The above is for your information and dissemination. Sincerely, or 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