Outcome of Board Meeting

November 7, 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: Outcome of the Board Meeting – November 7, 2026 Ref: Letter dated October 28, 2026 for intimation regarding the Board meeting Pursuant to Regulations 30, 33, 51 and 52 and other applicable Regulations of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that the Board of Directors of the Company at its Meeting held today i.e. Saturday, November 7, 2026, have, inter alia, approved the Unaudited Consolidated and Audited Standalone Financial Results of the Company for the second quarter and half-year ended September 30, 2026. The Board Meeting commenced at 2.00 p.m. (lST) and concluded at 4.40 p.m. (lST). A copy of the said Financial Results together with the Auditors' Report/Limited Review Report is enclosed herewith. These are also being made available on the website of the Company at 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 B S R & Co. LLP 14th Floor, Central B Wing and North C Wing Nesco IT Park 4, Nesco Center Western Express Highway Chartered Accountants Goregaon (East), Mumbai – 400 063, India Telephone: +91 (22) 6257 1000 Fax: +91 (22) 6257 1010 Limited Review Report on unaudited consolidated financial results of Tata Chemicals Limited for the quarter ended 30 September 2026 and year to date results for the period from 1 April 2026 to 30 September 2026 pursuant to Regulation 33 and Regulation 52(4) read with Regulation 63 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended To the Board of Directors of Tata Chemicals Limited 1. We have reviewed the accompanying Statement of unaudited consolidated financial results of Tata Chemicals Limited (hereinafter referred to as “the Parent”), and its subsidiaries (the Parent and its subsidiaries together referred to as “the Group”) and its share of the net profit after tax and total comprehensive income of its associate and joint ventures for the quarter ended 30 September 2026 and year to date results for the period from 1 April 2026 to 30 September 2026 (“the Statement”), being submitted by the Parent pursuant to the requirements of Regulation 33 and Regulation 52(4) read with Regulation 63 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended ("Listing Regulations"). 2. This Statement, which is the responsibility of the Parent’s management and approved by the Parent’s Board of Directors, has been prepared in accordance with the recognition and measurement principles laid down in Indian Accounting Standard 34 “Interim Financial Reporting” (“Ind AS 34”), prescribed under Section 133 of the Companies Act, 2013, and other accounting principles generally accepted in India and in compliance with Regulation 33 and Regulation 52(4) read with Regulation 63 of the Listing Regulations. Our responsibility is to express a conclusion on the Statement based on our review. 3. We conducted our review of the Statement in accordance with the Standard on Review Engagements (SRE) 2410 “Review of Interim Financial Information Performed by the Independent Auditor of the Entity”, issued by the Institute of Chartered Accountants of India. A review of interim financial information consists of making inquiries, primarily of persons responsible for financial and accounting matters, and applying analytical and other review procedures. A review is substantially less in scope than an audit conducted in accordance with Standards on Auditing and consequently does not enable us to obtain assurance that we would become aware of all significant matters that might be identified in an audit. Accordingly, we do not express an audit opinion. We also performed procedures in accordance with the circular issued by the Securities and Exchange Board of India under Regulation 33(8) of the Listing Regulations, to the extent applicable. 4. The Statement includes the results of the entities mentioned in Annexure I to the Statement. 5. Based on our review conducted and procedures performed as stated in paragraph 3 above, nothing has come to our attention that causes us to believe that the accompanying Statement, prepared in accordance with the recognition and measurement principles laid down in the aforesaid Indian Accounting Standard and other accounting principles generally accepted in India, has not disclosed the information required to be disclosed in terms of Regulation 33 and Regulation 52(4) read with Regulation 63 of the Listing Regulations, including the manner in which it is to be disclosed, or that it contains any material misstatement. 6. The Statement also include the Group’s share of net loss after tax of Rs 3 crores and Rs 29 crores and total comprehensive loss of Rs 3 crore and Rs 29 crores for the quarter ended 30 September 2026 and for the period from 1 April 2026 to 30 September 2026 respectively, as considered in the Statement, in respect of a joint venture, whose interim financial information have not been reviewed by us. This interim financial information has been audited by other auditors whose report has been furnished to us by the management and our conclusion on the Statement, in so far as it relates to the amounts and disclosures included in respect of this joint venture, is based solely on the report of the other auditors and the procedures performed by us as stated in paragraph 3 above. Registered Office: B S R & Co. (a partnership firm with Registration No. BA61223) converted into B S R & Co. LLP (a 14th Floor, Central B Wing and North C Wing, Nesco IT Park 4, Nesco Limited Liability Partnership with LLP Registration No. AAB-8181) with effect from October 14, 2013 Center, Western Express Highway, Goregaon (East), Mumbai - 400063 Page 1 of 4 B S R & Co. LLP Limited Review Report (Continued) Tata Chemicals Limited Our conclusion is not modified in respect of this matter. 7. The Statement also includes the Group’s share of net profit after tax of Rs 23 crores and Rs 32 crores and total comprehensive (loss)/income of Rs (47) crores and Rs 10 crores for the quarter ended 30 September 2026 and for the period from 1 April 2026 to 30 September 2026 respectively, as considered in the Statement, in respect of one associate and two joint ventures, based on their financial information which has not been reviewed. According to the information and explanations given to us by the management, these financial information are not material to the Group. Our conclusion is not modified in respect of this matter. For B S R & Co. LLP Chartered Accountants Firm’s Registration No.:101248W/W-100022 Aniruddha Godbole Partner Mumbai Membership No.: 105149 07 November 2026 UDIN:26105149TIMFYJ4557 Page 2 of 4 B S R & Co. LLP Limited Review Report (Continued) Tata Chemicals Limited Annexure I List of entities included in unaudited consolidated financial results. Sr. No Name of component Relationship 1 Tata Chemicals Limited Holding Company 2 Tata Chemicals International Pte. Ltd Subsidiary 3 Rallis India Limited Subsidiary 4 Ncourage Social Enterprise Foundation Subsidiary 5 Homefield Pvt. UK Limited Step Down Subsidiary 6 Novabay Pte. Ltd Step Down Subsidiary 7 TCE Group Limited Step Down Subsidiary 8 Natrium Holdings Limited Step Down Subsidiary 9 Brunner Mond Group Limited Step Down Subsidiary 10 Tata Chemicals Europe Limited Step Down Subsidiary 11 Northwich Resource Management Limited Step Down Subsidiary 12 Winnington CHP Limited Step Down Subsidiary 13 Cheshire Salt Limited Step Down Sub [Showing first 8,000 characters — download PDF for full document]