Tata Chemicals Ltdhas informed BSE that the meeting of the Board of Directors of the Company is scheduled on 07/11/2026 ,inter alia, to consider and approve Unaudited Consolidated and Audited Standalone Financial Results of the Company for the second quarter and half-year ended September 30, 2026

October 28, 2026 The General Manager The Manager Corporate Relations Department National Stock Exchange of India Ltd 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 of Board Meeting Ref: Regulations 29(1)(a) and 50(1)(c) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 A meeting of the Board of Directors of the Company will be held on Saturday, November 7, 2026, inter-alia, to consider and approve the Unaudited Consolidated and Audited Standalone Financial Results of the Company for the second quarter and half-year ended September 30, 2026. In accordance with the ‘Tata Code of Conduct for Prevention of Insider Trading’ pursuant to the amended SEBI (Prohibition of Insider Trading) Regulations, 2015, the Company has intimated its Designated Persons regarding the closure of the trading window from Thursday, September 24, 2026, till the expiry of 48 hours from the said financial results are made public. This is for your information and records. A copy of this intimation is also being made available on the website at www.tatachemicals.com. Thanking you, Yours faithfully, For Tata Chemicals Limited Jeraz E. Mahernosh Company Secretary (FCS 7008)