General Updates

HZL/2026-27/SECY/84 September 18, 2026 BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, 5th Floor Plot No., C/l, G Block Dalal Street, Fort Bandra-Kurla Complex, Bandra (East), Mumbai – 400 001 Mumbai – 400 051 Kind Attn: General Manager – Department Kind Attn: Head Listing & Corporate of Corporate Services Communication Scrip Code: 500188 Trading Symbol: HINDZINC Dear Sir/Ma’am, Sub: Intimation under the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“Listing Regulations”) – ESG Ratings Pursuant to Regulation 30 of the Listing Regulations read with SEBI Master Circular HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, we wish to inform you that Niche Ninety Nine Capability and Certifications (OPC) Private Limited (“Niche99”), a SEBI registered ESG Rating Provider, has independently and voluntarily assigned an Environmental, Social and Governance (“ESG”) rating of “67.76” to the Company under the “Leader” category. The intimation of the aforesaid rating was received via email from BSE on September 17, 2026, at 06:51 p.m. Please note that the Company has not engaged Niche99 for ESG rating. The report has been prepared independently by them based on publicly available information/disclosure. The ESG rating as published by Niche99 is available at the following link: https://niche99.com/niche99-esg-ratings This is for your information and record. Thanking You. Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer