Tata Chemicals Ltd

UK auditor change

• KNAV Limited appointed as statutory auditor for four UK subsidiaries.
• KPMG LLP resigned; effective 16 September 2026.
• Subsidiaries: Homefield Pvt. UK Limited, TCE Group Limited, Brunner Mond Group Limited, British Salt Limited.
• Resignations due to audit-fee levels no longer acceptable.
• Audit committee/board not raising concerns with auditors.
• Annexures I and II provide details on appointments and resignations.
• Parent Tata Chemicals' audits remain with BSR& Co. LLP (KPMG group).

Tata Chemicals Limited – Trading Window closed from Thursday, September 24, 2026 in connection with the declaration of the Financial Results for the second quarter and half-year ending September 30, 2026; trading window will open 48 hours after the said financial results are declared to the Stock Exchanges.

Meeting Details

• Date: September 18, 2026; time not disclosed.
• Type/Mode: One-on-One, physical.
• Venue: Mumbai.
• Organizer: Aditya Birla Sun Life AMC.
• Company participant: Company Secretary.
• Purpose: Schedule of Analysts/Institutional Investor meeting.
• Note: No unpublished price sensitive information is proposed to be shared.

Acquisition completion

• TCNA completed acquisition of Searles Valley Minerals' North American soda ash contracts.
• Contracts represent over 500,000 metric tonnes to be serviced over two years.
• Completed on September 11, 2026 after satisfaction of all conditions precedent in the Assignment and Assumption Agreement.

Regulatory update

• A high-level technical committee will review the Kenyan mining ministry notice to TCML.
• Committee led by the Ministry's Principal Secretary for Mining and TCML CEO will prepare a report.
• Purpose is to enable a timely resolution and establish a sustainable framework for responsible mining and community development.

ESG rating disclosure

• NSE Sustainability assigned ESG Score 59 to Tata Chemicals Ltd on 2 September 2026.
• Company did not engage NSE Sustainability for ESG rating; rating prepared independently.
• Rating based on FY2025-26 data available in public domain.
• Disclosures comply with SEBI Listing Regulations Regulation 30 and related circular.
• ESG rating information will be available on Tata Chemicals' website.
• No material impact on operations or financials disclosed.

Ecosystem findings

• CSIR-CSMCRI study finds Mithapur coastal ecosystem healthy, stable, and biodiverse around treated wastewater discharge.
• Water and sediment quality within natural ranges; mangroves and avifauna show resilience.
• 637 birds across 40 species recorded, including about 250 Greater Flamingos.
• Plankton community comprises 22 phytoplankton and 23 zooplankton species, indicating a productive marine food web.
• Biennial monitoring tied to the discharge project; August 2026 report released.