Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 for Update on Notice issued to Tata Chemicals Magadi Limited

October 24, 2026 The General Manager The Manager, Listing Department Corporate Relations Department National Stock Exchange of India Limited BSE Limited Exchange Plaza Phiroze Jeejeebhoy Towers Bandra-Kurla Complex Dalal Street Bandra (E) Mumbai 400 001 Mumbai 400 051 Scrip Code: 500770 Symbol: TATACHEM Dear Sirs, Sub: Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 for Update on Notice issued to Tata Chemicals Magadi Limited In continuation to our disclosure dated July 29, 2026, under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, on the Notice from the Ministry of Mining, Blue Economy and Maritime Affairs, Kenya (the Ministry) dated July 28, 2026 to Tata Chemicals Magadi Limited (TCML) the Kenyan subsidiary of Tata Chemicals Limited (the Company), and the status update provided on September 9, 2026 thereof, the Company is providing a further update on the said matter as mentioned hereunder. The High Court of Kenya has passed an order dated October 23, 2026, that the Hon’ble Court has no jurisdiction on the dispute and cannot take any further steps. TCML, is examining the order and will take legal and all other necessary steps for way forward in this matter. It may further be noted that the Committee led by the Principal Secretary for Mining on behalf of the Ministry and the Chief Executive Officer of TCML is in the process of undertaking a detailed technical review of all matters and will submit a report to the office of the Cabinet Secretary for consideration and further direction to establish a sustainable framework that promotes responsible mining, value addition, community development and mutually beneficial partnerships. We request you to kindly take the above information on record. Yours faithfully, For Tata Chemicals Limited Jeraz E. Mahernosh Company Secretary (FCS 7008)