Trading Window

HZL/2026-27/SECY/47 June 26, 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 Trading Window Closure In compliance with the Securities & Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 and Insider Trading Prohibition Code of the Company (‘Code’), the Trading Window shall remain closed for dealing in the securities of the Company from Wednesday, July 01, 2026 till the expiry of 48 hours after the declaration of Unaudited Financial Results (Standalone and Consolidated) of the Company for the quarter ending June 30, 2026. The date of the Board Meeting for the said results shall be intimated to the Stock Exchanges in due course of time. This is for your information and records. Thanking you. Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Sensitivity: Public (C4)