Change in Auditors

July 27, 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: Appointment of Statutory Auditors 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 based on the recommendation of the Audit Committee, the Board of Directors at its Meeting held today i.e. July 27, 2026, has approved the appointment of S R B C & CO. LLP, Chartered Accountants (ICAI Firm Registration No.: 324982E/E300003) (‘SRBC’), as the Statutory Auditors of the Company for a term of five years, commencing from the conclusion of the 88th Annual General Meeting (‘AGM’) (to be held in the year 2027) until the conclusion of the 93rd AGM (to be held in the year 2032), subject to Members’ approval at ensuing AGM. B S R & Co. LLP, Chartered Accountants (ICAI Firm Registration No. 101248W/W-100022), the existing Statutory Auditors, will continue to undertake the audit of the Company and its subsidiaries until the conclusion of the 88th AGM to be held in the year 2027. 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 in the Annexure below. The Board Meeting commenced today at 2.00 p.m. and concluded at 4.10 p.m. 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 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. Reason for change viz. appointment, B S R & Co. LLP, Chartered Accountants (ICAI Firm re-appointment, resignation, removal, Registration No. 101248W/W-100022), the existing death or otherwise Statutory Auditors will continue to undertake the audit of the Company and its subsidiaries until the conclusion of the 88th Annual General Meeting (‘AGM’), marking the completion of their second consecutive term of five years. S R B C & CO. LLP, Chartered Accountants, (ICAI Firm Registration No.: 324982E/E300003), have been appointed as the Statutory Auditors of the Company from the conclusion of the 88th AGM, subject to approval of the Members. 2. Date of appointment / reappointment / Based on the recommendation of the Audit Committee, cessation (as applicable) and Term of the Board of Directors at its Meeting held today Appointment /reappointment approved the appointment of S R B C & CO. LLP, Chartered Accountants, (ICAI Firm Registration No.: 324982E/E300003), as the Statutory Auditors of the Company for a term of five years i.e. from the conclusion of the 88th AGM until the conclusion of the 93rd AGM, subject to approval of the Members. 3. Brief profile (in case of appointment) S R B C & CO LLP (‘the Firm’) is a limited liability partnership firm incorporated in India and is a firm of Chartered Accountants registered with the Institute of Chartered Accountants of India (‘ICAI’) with (ICAI Firm Registration No. 324982E/E300003). The Firm is part of S. R. Batliboi & Affiliates, a network of firms registered with the ICAI. Established in 2002, the Firm has its registered office in Kolkata and has offices across key cities in India. The Firm has a valid Peer Review certificate. All the network firms, including the Firm, are primarily engaged in providing audit and assurance services to its clients. They, along with their network firms audit several large listed and private companies across diverse market segments including Industrial, Infrastructure, Consumer Products, Financial Services, Technology, Media and Entertainment, Telecommunications and Professional Services. 4. Disclosure of relationships between Not Applicable directors (in case of appointment of a Director)