General Updates

September 26, 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, Subject: Material Subsidiaries of the Company in the UK – Change in Statutory Auditor Pursuant to Regulations 30 and 51 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, (‘SEBI Listing Regulations’), this is to inform you that the Standalone and Consolidated Financial Results of Tata Chemicals Limited (the Company) continue to be audited by the Company’s Statutory Auditor BSR & Co. LLP (part of the KPMG Group). The Company has certain Material Subsidiaries (based on Net Worth) in the UK viz. Sl. No. Company Remarks 1 Homefield Pvt. UK Limited Holding Company in UK with no other operations 2 TCE Group Limited Intermediate Holding Company in UK under Homefield Pvt. UK Limited with no other operations 3 Brunner Mond Group Limited Intermediate Holding Company in UK under TCE Group Limited with no other operations 4 British Salt Limited Operating Company with revenue of 5% of consolidated revenue whose Statutory Auditor has changed consequently upon appointment of KNAV Limited (Registration No. 03215471) as the Statutory Auditor of each entity and resignation of KPMG LLP (Registration No. 9188307) from the respective entities. The Statutory Auditor of the above Material Subsidiaries have not raised any concern about the affairs to the Audit Committee/ Board of the respective entities. The details as required under Regulation 30 of the SEBI Listing Regulations read with SEBI Master Circular No. SEBI/HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, are enclosed as Annexure I. The details of resignation and the resignation letters for the respective entities are enclosed as Annexure II. The above information is also being made available on the Company’s website at www.tatachemicals.com. This is for your information and records. Thanking you, Yours faithfully, For Tata Chemicals Limited Jeraz E. Mahernosh Company Secretary (FCS 7008) Encl: as above Annexure I Disclosure in terms of Regulation 30 of the SEBI Listing Regulations read with SEBI Master Circular HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 Sr. Particulars Details 1. Name of the Material Homefield Pvt. UK Limited Subsidiaries TCE Group Limited Brunner Mond Group Limited British Salt Limited 2. Name of the firm KMPG LLP 3. Reason for change viz. Resignation of KPMG LLP as Statutory Auditors of the Company’s Material Subsidiaries appointment, re-appointment, in UK resignation, removal, death or otherwise 4. Date of appointment / September 16, 2026, for Homefield Pvt. UK Limited reappointment / cessation (as applicable) and Term of September 16, 2026, for TCE Group Limited, Brunner Mond Group Limited and British Salt Appointment /reappointment Limited, communicated to the respective entities vide letter dated September 25, 2026. 5. Brief profile (in case of Not Applicable appointment) 6. Disclosure of relationships Not Applicable between directors (in case of appointment of a Director) Annexure II Sr. Particular s 1. Name of the listed entity/ material Homefield Pvt. TCE Group Brunner Mond British Salt subsidiary UK Limited Limited Group Limited Limited 2. Details of the statutory auditor: a. Name: KPMG LLP b. Address: 15 Canada Square, Canary Wharf, London E14 5GL, United Kingdom c. Phone number: +44 (0) 20 7311 1000 d. Email: Roger.Nixon@KPMG.co.uk 3. Details of association with the listed entity/ material subsidiary: a. Date on which the statutory auditor was July 6, 2022 July 6, 2022 July 6, 2022 July 6, 2022 appointed: b. Date on which the term of the statutory March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 auditor was scheduled to expire: c. Prior to resignation, the latest audit May 29, 2026 May 29, 2026 May 29, 2026 May 29, 2026 report/limited review report submitted by the auditor and date of its submission. 4. Detailed reasons for resignation The reason connected with the ceasing of Statutory Auditors is the continuation of audit fees at levels charged in previous years is no longer acceptable to the respective entities. 5 In case of any concerns, efforts made by the auditor prior to resignation (including approaching the Audit Committee/Board of Directors along with the date of Not Applicable communication made to the Audit Committee/Board of Directors) 6 In case the information requested by the auditor was not provided, then following shall be disclosed: a. Whether the inability to obtain sufficient appropriate audit evidence was due to a management imposed limitation or circumstances beyond the control of the management. b. Whether the lack of information would have significant impact on the financial statements/ results. Not Applicable c. Whether the auditor has performed alternative procedures to obtain appropriate evidence for the purposes of audit/limited review as laid down in SA 705 (Revised) . d. Whether the lack of information was prevalent in the previous reported financial statements/results. If yes, on what basis the previous audit/limited review reports were issued. 7 Any other facts relevant to the resignation: Not Applicable KPMG LLP Tel +44 (0) 20 7311 1000 Audit Fax +44 (0) 20 7311 3311 15 Canada Square London E14 5GL United Kingdom Private & confidential Homefield Pvt UK Limited Our ref AR-3358 Natrium House Winnington Lane Contact Roger Nixon Northwich Roger.Nixon@KPMG.co.uk CW8 4GW 16 September 2026 Dear Sir/Madam Resignation as auditors of Homefield Pvt UK Limited (no. 05608419) We hereby give notice of our resignation as auditors of the company with effect from 16 September 2026. In accordance with section 519 of the Companies Act 2006, we enclose our statutory statement in connection with our ceasing to act. Under section 523 of the Companies Act 2006, you are required to notify the relevant audit authority, in this case being the ICAEW, in connection with our resignation unless you reasonably believe that the reason for our resignation is exempt under section 519A. Our reason set out in the attached statutory statement is not an exempt reason under that section. Yours faithfully KPMG LLP Audit registration number: 9188307 Audit registration address: 15 Canada Square Canary Wharf London E14 5GL KPMG LLP, a UK limited liability partnership and a member firm of the Registered in England No OC301540 KPMG global organisation of independent member firms affiliated with Registered office: 15 Canada Square, London, E14 5GL KPMG International Limited, a private English company limited by For full details of our professional regulation please refer to guarantee. ‘Regulatory information’ under ‘About’ at www.kpmg.com/uk Reference – AR-3358 Document Classification - KPMG Highly Confidential KPMG LLP Tel +44 (0) 20 7311 1000 Audit Fax +44 (0) 20 7311 3311 15 Canada Square London E14 5GL United Kingdom Private & confidential Homefield Pvt UK Limited Our ref AR-3358 Natrium House Winnington Lane Contact Roger Nixon Northwich Roger.Nixon@KPMG.co.uk CW8 4GW 16 September 2026 Dear Sir/Madam Statement to Homefield Pvt UK Limited (no. 05608419) on ceasing to hold office as auditors pursuant to section 519 of the Companies Act 2006 The reason connected with our ceasing to hold office is that the continuation of our fees at levels charged in previous years is no longer acceptable to the company. We consider that there is no matter connected with our ceasing to hold office, whether the above reason or otherwise, that needs be brought to the attention of the company’s members or creditors. Yours faithfully KPMG LLP Audit registration number: 9188307 Audit registration address: 15 Canada Square Canary Wharf London E14 5GL KPMG LLP, a UK limited liability partnership and a member firm of the Re [Showing first 8,000 characters — download PDF for full document]