Certificate under SEBI (Depositories and Participants) Regulations, 2018

HZL/2026-27/SECY/88 October 06, 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: Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended September 30, 2026 Please find enclosed herewith the certificate dated October 06, 2026, issued under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018, by M/s. KFin Technologies Limited, the Registrar & Share Transfer Agent of the Company, for the quarter ended September 30, 2026. We request you to please take the above on record. Thanking You Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Enclosed: - As above Sensitivity: Public (C4) Date: 06-10-2026 THE COMPANY SECRETARY Hindustan Zinc Limited Yashad Bhawan, Udaipur, RAJASTHAN - 313004. Sub: Confirmation Certificate in the matter of Regulation 74(5) of Securities. and Exchange Board of India (Depositories and Participants) Regulations, 2018. Dear Sir/Madam, Pursuant to Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018, we hereby confirm that securities received from the depository participants for dematerialisation during the quarter ended September 2026, were confirmed (accepted / rejected) to the depositories by us and the securities comprised in the said certificates have been listed on stock exchanges where the earlier issued securities are listed. We also hereby confirm that the security certificates received for dematerialisation have been mutilated and cancelled after due verification by the depository participant and the name of the depositories have been substituted in register of members as the registered owner within 15 days. Request to kindly take the above on record, Yours faithfully, For KFin Technologies Limited Ganesh Chandra Patro Deputy Vice President