Please refer the enclosed file

HZL/2026-27/SECY/75 August 15, 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 Regulation 30 & 51(2) read with Schedule III of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended (“SEBI Listing Regulations”) This is to inform you that Ministry of Mines, Government of India vide order no. Met3-10/2/2020- Metal III dated August 14, 2026, has conveyed the appointment of Dr. Yogesh Attray (DIN- 07654847), as non- official part-time Director on the Board of Hindustan Zinc Limited (HZL), for a period of 3 years w.e.f. date of notification or until further orders, whichever is earlier. Further the Board of Directors of the Company on the recommendation of the Nomination and Remuneration Committee through resolution passed by circulation on Saturday, August 15, 2026, at 02:40 PM IST approved the appointment of Dr Yogesh Attray as an additional Director designated as Non-Executive Independent Director of the Company w.e.f August 14, 2026, in accordance with the aforesaid order of the Ministry of Mines, Government of India. We hereby confirm that Dr Yogesh Attray satisfies the criteria of independence prescribed under the Companies Act, 2013 and SEBI Listing Regulations and that he is not debarred from holding the office of Director by virtue of any order passed by SEBI or any other such authority. 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, along are enclosed and marked as Annexure-I. 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 Encl: as above Sensitivity: Public (C4) Annexure-I S. No. Particulars Details 1. Reason for change viz. Appointment of Dr Yogesh Attray (DIN- 07654847) as an appointment, reappointment, Additional Director designated as Non-Executive resignation, removal, death or Independent Director of the Company. otherwise 2. Date of appointment 1st term of three years commencing from August 14, 2026, or until further orders by the Ministry of Mines, Government of India, whichever is earlier. 3. Brief profile (in case of Dr Yogesh Attray is a distinguished educationist, appointment): researcher, and entrepreneur with over two decades of experience in the fields of education, administration, social development, and agriculture. He serves as the Chairman of Bhartiya Prashikshan Sansthan, a teacher training institute recognized by NCTE, Government of India, and is also the owner of Attray Organics Farmhouse, engaged in certified organic and hi-tech agriculture initiatives in Rajasthan. Dr. Attray holds a Ph.D. in Political Science from Dr. A.P.J. Abdul Kalam University, Indore, and MA in Political Science. He has extensive experience in educational administration, research, and community development. He has also been associated with various social welfare initiatives and has served as President of the SC/ST Welfare and Development Society since 1997. 4. Disclosure of relationships Dr Yogesh Attray is not related to any of the Directors of between Directors (in case of the Company. appointment of a director) Sensitivity: Public (C4)