Acquisition of equity shares in T Steel Holdings Pte. Ltd

Ref.: SEC/1123/2026-27 September 29, 2026 The Secretary, Listing Department The Manager, Listing Department BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers, Exchange Plaza, 5th Floor, Plot No. C/1, Dalal Street, G Block, Bandra-Kurla Complex, Bandra (E), Mumbai - 400 001. Mumbai - 400 051. Maharashtra, India. Maharashtra, India. Scrip Code: 500470 Symbol: TATASTEEL Dear Madam, Sirs, Sub: Acquisition of equity shares in T Steel Holdings Pte. Ltd This is further to our earlier disclosures in relation to the abovementioned subject, the latest being August 27, 2026. The Board of Directors of Tata Steel Limited (‘Company’) at its meeting held on March 17, 2026, had inter alia approved the infusion of additional funds up to USD 2 Billion (~₹18,488.10 crore), enhancing the aggregate investment limit up to USD 26.21 Billion, by way of subscription to equity shares of T Steel Holdings Pte. Ltd (‘TSHP’), a wholly owned foreign subsidiary of the Company, in one or more tranches. In this connection, we wish to inform you that, the Company has today i.e., on September 29, 2026, acquired 393,51,85,186 equity shares of face value USD 0.0864 each aggregating to USD 340 million (₹3,260.32 crore*) in TSHP. Post this acquisition, TSHP will continue to be a wholly owned subsidiary of the Company. This disclosure is being made in compliance with Regulation 30 and 51 read with Para A of Part A of Schedule III of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended. Yours faithfully, Tata Steel Limited Parvatheesam Kanchinadham Company Secretary and Chief Legal Officer *USD to INR exchange rate has been taken as ₹95.8918 as published by Reserve Bank of India on September 25, 2026.