Please refer the enclosed file

HZL/2026-27/SECY/98 October 19, 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 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 - Investor Presentation In continuation of our Letter No. HZL/2026-27/SECY/96 dated October 19, 2026, regarding the declaration of the Unaudited Consolidated and Standalone Financial Results of the Company for the second quarter and half year ended September 30, 2026 (“Financial Results”), please find enclosed herewith a copy of the Investor Presentation issued in relation to the Financial Results. The same is also available on the website of the Company at www.hzlindia.com. This is for your information and records. Thanking You. Yours faithfully, For Hindustan Zinc Limited Aashhima V Khanna Company Secretary & Compliance Officer Encl: as above EARNINGS 2QFY27 PRESENTATION HINDUSTAN ZINC LIMITED World’s Largest Integrated Zinc Producer Cautionary Statement and Disclaimer Cautionary The views expressed here may contain information derived from publicly available sources that have not been independently verified. Statement and No representation or warranty is made as to the accuracy, completeness, reasonableness, or reliability of this information. Any forward-looking information in this presentation including, without limitation, any tables, charts and/or graphs, has been prepared on the basis of a number of assumptions which may prove to be incorrect. This presentation should not be relied Disclaimer upon as a recommendation or forecast by Hindustan Zinc Limited. Past performance of Hindustan Zinc cannot be relied upon as a guide to future performance. This presentation contains 'forward-looking statements’ -that is, statements related to future, not past, events. In this context, forward-looking statements often address our expected future business and financial performance, and often contain words such as 'expects’, 'anticipates’, 'intends’, 'plans’, 'believes’, 'seeks’, or 'will’. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. For us, uncertainties arise from the behaviour of financial and metals markets including the London Metal Exchange, fluctuations in interest and or exchange rates and metal prices; from future integration of acquired businesses; and from numerous other matters of national, regional and global scale, including those of environmental, climatic, natural, political, economic, business, competitive or regulatory nature. These uncertainties may cause our actual future results to be materially different that those expressed in our forward-looking statements. We do not undertake to update our forward-looking statements. We caution you that reliance on any forward- looking statement involves risk and uncertainties, and that, although we believe that the assumption on which our forward- looking statements are based are reasonable, any of those assumptions could prove to be inaccurate and, as a result, the forward-looking statement based on those assumptions could be materially incorrect. This presentation is not intended, and does not, constitute or form part of any offer, invitation or the solicitation of an offer to purchase, otherwise acquire, subscribe for, sell or otherwise dispose of, any securities in Hindustan Zinc or undertakings or any other invitation or inducement to engage in investment activities, nor shall this presentation (or any part of it) nor the fact of its distribution form the basis of, or be relied on in connection with, any contract or investment decision. Earnings Presentation 2QFY27 2 Index of Contents Index of Contents 04 Key Highlights Key Highlights 08 Sustainability Update Sustainability Update 12 Market Update Market Update Operational and Project Update Operational and Project Update 20 Financial Review Financial Review 24 Appendix Appendix Earnings Presentation 2QFY27 3 Record Volumes and Lower Cost Drive Highest-ever Financial Performance Record Volumes and Lower Cost Drive Highest-ever Financial Performance Record 2Q Production Highest-ever Financial Zinc COP Strong Free Cash Performance Flow Record Mined metal production Revenuefrom operations Zinc cost of production Achieved ₹ 6,389crorefree 271KT,↑ 5% YoY ₹ 15,093crore,↑ 77% YoY excluding royalty cash flow from operations Quarterly Refined metal production EBITDA $703/MT, better 29% YoY Performance 264KT, ↑ 7%YoY ₹ 9,285crore,↑108% YoY Siver production Net Profit 173MT,↑ 20% YoY ₹ 6,412 crore, ↑ 142% YoY Record 1H Production Highest-everFinancial ZincCOP Precious Metal Performance Contribution Historic Minedmetal production Revenue from operations Zinc cost of production Silver continued to 539 KT, ↑ 3% YoY ₹ 28,840 crore, ↑ 77% YoY excluding royalty contribute c.45% to the Half Year $776/MT,better23% YoY overall profitability Refinedmetal production EBITDA Performance 524KT, ↑ 6% YoY ₹ 17,359 crore, ↑ 108% YoY Silver production Net Profit 321MT, ↑ 10% YoY ₹ 11,881 crore,↑ 143% YoY Note: Free cash flow is pre growth capex Earnings Presentation 2QFY27 4 Unique Positioning in Metals Mining and Energy Transition Space World’s 2nd Largest Unique Positioning World’s Largest Zinc & Lead Metal Reserves & Integrated Zinc Producer Resources with 25+ years of mine life in Metals & Mining Ranked 1st and Energy World’s Largest in Metals & Mining sector in Zinc Mine at S&P Global CSA 2025 for Transition Space Rampura Agucha the 3rd consecutive year Among Top 10 Asia’s first Silver producers low carbon ‘green’ globally zinc producer Among lowest cost 1st Indian Company Zinc producers globally to join the prestigious ICMM Well-Positioned to Capitalize on India’s Strong Growth Trajectory India’s only integrated India’s only integrated and c.74% expected domestic Consistently rated AAA by producer of Zinc and Lead listed primary Silver company primary zinc market share CRISIL Ratings Limited Source: Woodmacand World Silver Survey 2026 CSA: Corporate Sustainability Assessment; ICMM: International Council of Mining and Metals Earnings Presentation 2QFY27 5 Note: India positioning is based on FY2026 Building A Multi-metal Ecosystem Under India’s Critical Mineral Mission Building A Multi-metal Ecosystem Under India’s Critical Mineral Mission Poised to lead India's critical minerals ecosystem through diversification, systematic exploration, and sustainable resource development Zinc underpins the energy Essential for the energy transition through corrosion- transition, silver underpins resistant applications in EVs, electronics, ZINC SILVER renewable infrastructure, infrastructure and renewables, driven by diverse industrial end markets, superior conductivity and and emerging energy storage limited substitutes. solutions. Mineral Block Name Location Status update Exploration timeline Mining timeline Tungsten Balepalyam Andhra Pradesh Exploration started in Q4FY26 Sep’28 Sep’30 Potash Jhandawali-Satipura Rajasthan Grant of composite license Dec’28 Apr’30 REE Nawatola-Laband Uttar Pradesh Grant of composite license Dec’28 Jun’30 REE & Yttrium Gundlupet Karnataka LOI for preferred bidder received - - Earnings Presentation 2QFY27 6 Building the intelligent and automated operations of tomorrow Building the intelligent and automated operations of tomorrow Smarter, connected & efficient operations Technology already Intelligence running Advancing digital and running at Mines in Smelters AI integration •Pre-crush rock fragmentation analysis •Predictive equipment health •Predictive infrastructure health •Conveyor health monitoring •Thermal monitoring of critical electrical •Froth pr [Showing first 8,000 characters — download PDF for full document]