Please refer the enclosed file

HZL/2026-27/SECY/65 July 24, 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: Disclosure under Regulations 30 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 Pursuant to Regulation 30 read with Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("SEBI Listing Regulations"), we wish to inform you that the Board of Directors of Hindustan Zinc Limited ("Company"), at its meeting held today, i.e. Friday, July 24, 2026, based on the recommendation of the Nomination and Remuneration Committee, has approved the classification/designation of the following existing officials of the Company to Senior Management Personnel (“SMP”) with effect from July 24, 2026: 1. Mr. Munish Vasudeva - Chief Human Resources Officer 2. Mr. Kishor Kumar Sugumaran - Chief Operating Officer The details as required under Regulation 30 of the SEBI Listing Regulations read with SEBI Master Circular No. SEBI/HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, is enclosed and marked as Annexure-I. The meeting of the Board of Directors of the Company commenced at 12:00 Noon and concluded at 2:05 p.m. IST. We request you to kindly take the above information on record. Thanking You. Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Sensitivity: Public (C4) Annexure-I. Sr. Particulars Details No. Name of the SMP Mr. Munish Vasudeva Mr. Kishor Kumar Sugumaran 1. Reason for change viz. appointment, Classification/designation of the Classification/designation of reappointment, resignation, removal, existing officials of the Company to the existing officials of the death or otherwise Senior Management Personnel Company to Senior Management Personnel 2. Date of appointment/ re- With effect from July 24, 2026 With effect from July 24, 2026 appointment/cessation & term of appointment/re-appointment. 3. Brief Profile (in case of appointment) Mr. Munish has over 33 years of Mr. Kishor has over 28 years of experience in human resources extensive experience in the across various verticals of talent metals & mining industry, acquisition, business partnering, Kishore has played a pivotal rewards & remuneration, role in transition of Hindustan organisational design, leadership Zinc’s mines into world-class development, succession planning underground operations and mergers & acquisitions. He has through technology been in leadership roles in a innovation and digitalisation, large multinational for over two also fuelling the growth decades. journey and green transformation journey of Hindustan Zinc. He holds a Bachelor of Engineering degree in mining from Bangalore University. 4. Disclosure of relationships between Not Applicable Not Applicable Directors (in case of appointment of a director). 5. Explanation for delay in disclosure The disclosure is being submitted with a delay due to administrative reasons. Sensitivity: Public (C4)