Tata Chemicals Receives Independent ESG Score of 59

Date: September 3, 2026

Regulatory Compliance Disclosure

Tata Chemicals Limited has intimated the stock exchanges (BSE and NSE) of an Environmental, Social, and Governance (ESG) Score of 59 assigned to the company by NSE Sustainability Ratings and Analytics Limited (NSE Sustainability).

The report containing this score was received by the company on September 2, 2026.

The company clarifies that it did not engage NSE Sustainability for this ESG rating. The rating agency prepared the report independently based on data pertaining to FY 2025-26 that was available in the public domain.

This disclosure is made in compliance with:

• Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015.
• SEBI Master Circular HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026.

The information has also been made available on the company's website at www.tatachemicals.com.

The letter was signed by Jeraz E. Mahernosh, Company Secretary (FCS 7008).