Hindustan Zinc Ltdhas informed BSE that the meeting of the Board of Directors of the Company is scheduled on 19/10/2026 ,inter alia, to consider and approve Unaudited Financial Results (Standalone and Consolidated) of the Company for the Second Quarter and Half Year Ended September 30, 2026.

HZL/2026-27/SECY/91 October 13, 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 of Board meeting In terms of Regulation 29 and 50 of the Securities and Exchange Board of India (“SEBI”) (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended from time to time, we wish to inform that the meeting of the Board of Directors of the Company is scheduled to be held on Monday, October 19, 2026, inter‐alia, to consider and approve the Unaudited Financial Results (Standalone and Consolidated) of the Company for the second quarter and half year ended September 30, 2026. Further, as intimated earlier vide Letter No. HZL/2026-27/SECY/86 dated September 28, 2026, pursuant to the provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Insider Trading Prohibition Code of the Company, as amended from time to time, the Trading Window for dealing in securities of the Company has been closed from Thursday, October 01, 2026, and shall reopen on Thursday, October 22, 2026. This is for your information and record. Thanking You. Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Sensitivity: Public (C4)