Press Release

August 29, 2026 The General Manager The Manager Corporate Relations Department Listing Department BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza Dalal Street Bandra-Kurla Complex, Bandra (E) Mumbai – 400 001 Mumbai – 400 051 Scrip Code: 500770 Symbol: TATACHEM Dear Sirs, Sub: Press Release In furtherance to our Stock Exchange disclosure made earlier today for Tata Chemicals North America Inc. ("TCNA"), a wholly owned subsidiary of Tata Chemicals Limited, being declared the successful bidder in the Chapter 11 bankruptcy proceedings of Searles Valley Minerals Inc. ("SVM"), USA, enclosed herewith is a copy of the Press Release titled “Tata Chemicals North America acquires customer contracts expected to generate over USD 110 million in revenue through 2028”. A copy of the press release is also being made available on the Company's website: www.tatachemicals.com. You are requested to take the same on record. Thanking you, Yours faithfully, For Tata Chemicals Limited Jeraz E. Mahernosh Company Secretary (FCS 7008) Encl.: as above TCL/PR/27/2627/Corporate Tata Chemicals North America acquires customer contracts expected to generate over USD 110 million in revenue through 2028 Mumbai, August 29, 2026: Tata Chemicals Limited ("TCL") today announced that its wholly owned subsidiary, Tata Chemicals North America Inc. ("TCNA"), has been declared the successful bidder in the Chapter 11 bankruptcy proceedings of Searles Valley Minerals Inc. ("SVM"), USA, for the acquisition of North American soda ash customer contracts representing over 500,000 metric tonnes to be serviced from September 2026 through December 2028. These contracts are expected to generate revenues of more than USD 110 million over the contract period. The acquisition strengthens TCNA's position in the North American soda ash market by expanding its domestic customer base and enhancing long-term customer relationships. The transaction is expected to improve demand visibility, support customer retention, and drive sustainable value creation. TCNA has entered into an Assignment and Assumption Agreement ("ASA") with Searles Valley Minerals Inc. for the acquisition of certain soda ash customer contracts and related commercial rights. The transaction has been approved by the United States Bankruptcy Court for the District of Delaware with cash consideration payment of USD 21.16 million and remains subject to customary closing conditions under the ASA. Mr. R. Mukundan, CEO & Managing Director, Tata Chemicals Limited, said: "This acquisition represents a strategic opportunity to strengthen our presence in the North American soda ash market and expand our customer base. The acquired contracts secure over 500,000 metric tonnes of demand and are expected to generate revenues exceeding USD 110 million through December 2028. The transaction enhances our portfolio of long-term customer relationships, improves demand visibility, and reinforces our commitment to delivering reliable supply and superior service. It is aligned with our strategy of driving profitable growth and creating sustainable value for all stakeholders." About Tata Chemicals Ltd. A part of over US$ 180 billion Tata Group, Tata Chemicals Limited, is a leading supplier of choice to Glass, Detergent, Industrial and Chemical sectors. The company has a strong position in the crop protection business through its subsidiary company, Rallis India Limited. Tata Chemicals has world class R&D facilities in Pune and Bengaluru. Website: https://www.tatachemicals.com/ Follow us on: Tata Chemicals Limited | Tata Chemicals Limited | Tata Chemicals Limited | Tata Chemicals Limited | Tata Chemicals Limited For more information please contact: Chintan Joshi Siddharth Kumar | Jophy Joseph Corporate Communications Adfactors PR Tata Chemicals Ltd Mobile: +91 9902929187 | 77389 55944 Mobile: 9223364761 siddharth.kumar@adfactorspr.com chjoshi@tatachemicals.com jophy.joseph@adfactorspr.com