Please refer the enclosed file.

HZL/2026-27/SECY/102 November 03, 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: Postal Ballot Notice – Intimation under Regulation 30 read with Schedule III of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI LODR Regulations”) Pursuant to Regulation 30 read with Schedule III of the SEBI LODR Regulations, we hereby enclose the Postal Ballot Notice dated October 30, 2026, along with the Explanatory Statement thereto (the “Notice”), seeking approval of the Members of the Company by way of remote e- voting only, in respect of the following Special Resolution: Approval for Enhancement of Limits for Loans, Guarantees, Securities and Investments by the Company under Section 186 of the Companies Act, 2013 The Notice is being sent electronically to those Members whose name appears in the register of Members or register of beneficial owners as received from the Depositories and whose e-mail addresses are registered with the Company/M/s. KFin Technologies Limited (“KFin”) i.e. Registrar and Transfer Agent /Depositories/Depository Participants (“DPs”) as on Friday, October 30, 2026 (“Cut-off Date”). The voting rights of the Members shall be in proportion to their share of the paid-up equity share capital of the Company as on the cut-off date. The Company has engaged the services of National Securities Depository Limited (“NSDL”) for providing remote e-voting facility to all its Members. The details of the procedure to cast the vote forms part of the ‘Notes’ section of the Notice. The assent or dissent on the above resolutions may be communicated by the Members through remote e-voting, within the following period: Commencement of e-voting From 9:00 a.m. (IST) on Wednesday, November 04, 2026 End of e-voting Up to 5:00 p.m. (IST) on Thursday, December 03, 2026 The Notice is also available on the Company’s website, i.e. www.hzlindia.com and on the website of the NSDL at www.evoting.nsdl.com. SSeennssiittiivviittyy:: PPuubblliicc ((CC44)) This is for your information and records. Thanking You, Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Enclosed: as above Copy to: National Securities Depository Limited, Trade World, A Wing, 4th Floor, Kamala Mills Compound, Lower Parel, Mumbai – 400013 Central Depository Services (India) Limited Marathon Futurex, A-Wing 25th Floor, N.M. Joshi Marg, Lower Parel, Mumbai - 400013 KFin Technologies Limited Selenium Tower B, Plot No. 31 & 32, Gachibowli, Financial District, Nanakramguda, Hyderabad - 500032 SSeennssiittiivviittyy:: PPuubblliicc ((CC44)) HINDUSTAN ZINC LIMITED CIN: L27204RJ1966PLC001208 Registered Office: Yashad Bhawan, Yashadgarh, Udaipur, Rajasthan -313004 Website: www.hzlindia.com Email: hzl.secretarial@vedanta.co.in Tel: +91 294 6604000-02 NOTICE OF POSTAL BALLOT [Pursuant to Section 108 and 110 of the Companies Act, 2013 read with Rule 20 and 22 of the Companies (Management and Administration) Rules, 2014, each as amended] Dear Member(s), Notice is hereby given that the resolution set out below is proposed for approval by the Members of Hindustan Zinc Limited ("the Company") by means of Postal Ballot through remote e-voting only ("e- voting"), pursuant to the provisions of Sections 108, 110 and other applicable provisions, if any, of the Companies Act, 2013 ("the Act") read with Rules 20 and 22 of the Companies (Management and Administration) Rules, 2014 ("the Rules"), Regulation 44 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("SEBI Listing Regulations"), Secretarial Standard on General Meetings ("SS-2") issued by the Institute of Company Secretaries of India, and other applicable laws, rules, regulations, circulars and notifications, as amended from time to time. This Postal Ballot is being conducted in accordance with the framework prescribed by the Ministry of Corporate Affairs ("MCA") vide General Circular Nos. 14/2020 dated 8th April, 2020, 17/2020 dated 13th April, 2020 and subsequent circulars issued from time to time, the latest being General Circular No. 03/2025 dated 22nd September, 2025 (collectively, the "MCA Circulars"), which permits the conduct of the postal ballot process through e-voting without the requirement of sending physical postal ballot forms. Accordingly, the Company is providing the facility to its Members to exercise their voting rights electronically in respect of the resolution set out in this Notice. The Explanatory Statement pursuant to Sections 102 and 110 of the Act, setting out the material facts and rationale in respect of the resolution proposed in this Postal Ballot Notice, is annexed hereto and forms an integral part of this Notice. SPECIAL BUSINESS: Approval for Enhancement of Limits for Loans, Guarantees, Securities and Investments by the Company under Section 186 of the Companies Act, 2013 To consider and, if thought fit, to pass the following resolution as a Special Resolution: “RESOLVED THAT in supersession of the Special Resolution passed by the Members of the Company on September 5, 2024, and pursuant to the provisions of Section 186 and other applicable provisions, if any, of the Companies Act, 2013 (“Act”), read with the rules made thereunder (including any statutory modification(s), amendment(s) or re-enactment(s) thereof for the time being in force), other applicable laws, rules and regulations, and the provisions of the Articles of Association of the Company, and subject to such approvals, consents, sanctions and permissions as may be necessary, approval of the Members be and is hereby accorded to the Board of Directors of the Company (hereinafter referred to as the “Board”, which term shall be deemed to include any Committee which the Board may have constituted or may hereinafter constitute to exercise its powers, including the powers conferred by this Resolution) to (i) give any loan to any person or other body corporate; (ii) give any guarantee or provide any security in connection with a loan to any other body corporate or person; and/or (iii) acquire, by way of subscription, purchase or otherwise, the securities of any other body corporate, from time to time, in one or more tranches, notwithstanding that the aggregate of the loans and investments already made, amounts for which guarantees have been given or securities have been provided, together with the loans, investments, guarantees or securities proposed to be made, given or provided by the Company may exceed the limits prescribed under Section 186(2) of the Act, i.e., sixty per cent of the paid-up share capital, free reserves and securities premium account of the Company or one hundred per cent of its free reserves and securities premium account, whichever is higher, upon such terms and conditions as the Board may, in its absolute discretion, deem fit, beneficial and in the best interests of the Company, provided that the aggregate amount of such loans, investments, guarantees and securities shall not, at any time, exceed ₹30,000 crore (Rupees Thirty Thousand Crore only), other than transactions in respect of wholly owned subsidiaries of the Company to the extent exempt from the requirement of prior approval under Section 186(3) of the Act read with the applicable rules, on such terms and conditions as the Board may consider appropriate and in the best interests of the Company. RESOLVED FURTHER THAT the Board of Directors be and is hereby authorised to decide and finalise, in its absolute discretion, the nature, quantum, terms and conditions of each such loan, gu [Showing first 8,000 characters — download PDF for full document]