Intimation of Analysts'/Investors Call under the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015

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 Analysts’/Investors Call under the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’) Pursuant to Regulation 30 of the SEBI Listing Regulations, we would like to inform that an Analysts’/Investors Call on the Unaudited Consolidated and Audited Standalone Financial Results of the Company for the second quarter and half-year ended September 30, 2026, would be held on Saturday, November 7, 2026, dial in details of which are enclosed herewith. 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) Encl: as above Tata Chemicals Ltd.’s Q2 & H1 FY27 Earnings Call Saturday, November 7th, 2026 at 5:30 pm IST Mumbai,28 October 2026: Tata Chemicals Limited, a global company operating in Living, Industrial and Farm Essentials will organize a conference call for investors and analysts on Saturday, November 7th, 2026 at 5:30 PM IST to discuss the Company’s Q2 & H1 FY27 financial performance. R Mukundan, Managing Director & CEO and Nandakumar Tirumalai, Chief Financial Officer will represent Tata Chemicals on the Call. The call will open with key comments from the management of Tata Chemicals Ltd, following which there will be an opportunity for participants to pose queries to the management through an interactive Question & Answer session. Details of the conference call are as follows: Timing : 5:30 PM IST on Saturday, November 7th, 2026 Pre- Registration : Diamond Pass Conference dial-in Primary number : +91 22 6280 1543 / +91 22 7115 8885 Hong Kong Local Access Number : 800 964 448 Singapore Local Access Number : 800 101 2045 UK Local Access Number : 0 808 101 1573 USA Local Access Number : 1 866 746 2133 For more information contact: Damini Jhunjhunwala / Vijay Furia / Chintan Joshi Tata Chemicals Ltd. Tel: +91 22 6232 7400 E-mail: djhunjhunwala@tatachemicals.com vfuria@tatachemicals.com chjoshi@tatachemicals.com