Pendency of Litigation(s)/dispute(s) or the outcome impacting the Company

October 16, 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 Regulations 30 and 51 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’) The Company vide its letter dated December 11, 2024, had informed the exchanges that Allied Silica Limited (ASL) and its Promoter Mr. Manmohan Singh Jain had filed a Statement of Claim for ₹ 908 crore against the Company in arbitration proceedings initiated under the rules of the Mumbai Centre for International Arbitration (“MCIA”). A three-member Tribunal of the MCIA has further to the intimation above, passed a final award dated October 15, 2026, unanimously rejecting the claim of ₹ 908 crore against the Company. However, the majority members of the Tribunal have directed the Company to pay a principal amount of ₹ 1 crore along with interest and certain costs to ASL, which direction (payment of the principal amount with interest and costs) has been rejected by the dissenting member. The Company is currently examining the said final award and will evaluate its future course of action. The requisite disclosure as mandated under Regulation 30 read with Schedule III of the SEBI Listing Regulations and SEBI Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, is enclosed herewith as an Annexure. We request you to kindly take the above information on record. Yours faithfully, For Tata Chemicals Limited Jeraz E. Mahernosh Company Secretary (FCS 7008) Annexure Sr. Details of Events Information of such events(s) a. The details of any change in the status The Mumbai Centre for International Arbitration and / or any development in relation to has passed a final award dated October 15, 2026. such proceedings Against the claim of ₹ 908 crore made by Allied Silica Limited, the Company is directed to pay a principal amount of ₹ 1 crore, together with interest and certain costs. The Company is currently examining the said final award and will evaluate its future course of action. b. In the case of litigation against key Not Applicable management personnel or its promoter or ultimate person in control, regularly provide details of any change in the status and / or any development in relation to such proceedings c. Details of such settlement including - Not Applicable terms of the settlement Compensation/penalty paid (if any) Impact of such settlement on the financial position of the listed entity