Please refer the enclosed file

HZL/2026-27/SECY/97 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 - Press Release 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 a copy of the press release issued in connection with 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 Hindustan Zinc Limited, the World's Largest Integrated Zinc Producer, announces Results for the Second Quarter and Half Year ended September 30, 2026 Record Quarterly Net Profit of ₹ 6,412 crore, up 142% YoY Highest-ever Quarterly EBITDA of ₹ 9,285 crore, up 108% YoY 2QFY27 Highlights: ▪ Record second quarter mined metal production of 271 KT, up 5% YoY ▪ Best-ever second quarter refined metal production of 264 KT, up 7% YoY ▪ Zinc cost of production excluding royalty of $ 703 per tonne, better 29% YoY ▪ Silver production of 173 tonnes, up 20% YoY, contributing significantly to profitability ▪ Highest-ever revenue from operations of ₹ 15,093 crore, up 77% YoY ▪ Industry-leading EBITDA margin of 62% ▪ Strong free cash flow pre growth capex of ₹ 6,389 crore 1HFY27 Highlights: ▪ Record 1H mined metal production for the 6th consecutive year at 539 KT, up 3% YoY ▪ Best-ever 1H refined metal production of 524 KT, up 6% YoY ▪ Zinc cost of production excluding royalty of $ 776 per tonne, better 23% YoY ▪ Silver production of 321 tonnes, up 10% YoY, contributing c.45% towards overall profitability ▪ Highest-ever revenue from operations of ₹ 28,840 crore, up 77% YoY ▪ Highest-ever EBITDA of ₹ 17,359 crore, up 108% YoY, with industry-leading margin of 60% ▪ Record net profit of ₹ 11,881 crore, up 143% YoY ▪ Strong free cash flow pre growth capex of ₹ 11,642 crore ▪ Total shareholder returns of 15%, around 12x of Nifty 50 and 4x of Nifty 100 returns ▪ Contribution to the national exchequer of ₹13,027 crore, including ₹3,724 crore to the Rajasthan exchequer through taxes, duties and mining royalties. 2QFY27 ESG highlights: ▪ Renewable power consumption increased to 27% of the overall power consumption ▪ Zinc alloy plant is now sourcing 100% power from renewable energy sources ▪ Flagged off 1st EV crane at Rajpura Dariba and EV cherry-picker at Rampura Agucha ▪ Partnered with MFL India for 30 EV trucks at Rampura Agucha for transportation ▪ MoU with Arid Forest Research Institute to establish scientifically planned, high-density plantations and a sustainable greenbelt at Chanderiya Lead Zinc Smelter Commenting on company’s performance, Amarendu Prakash, Chief Executive Officer, said: “I am honored to lead Hindustan Zinc at this pivotal stage. Our record quarterly mined metal production of 271 KT and refined metal production of 264 KT demonstrates the strength of our operations, assets and people. We remain focused on disciplined growth, AI-led innovation, and advancing our critical minerals portfolio to support India’s energy transition while delivering long-term stakeholder value.” Amit Gupta, Chief Financial Officer, said: “Hindustan Zinc delivered the highest-ever quarterly financial performance, with EBITDA of ₹9,285 crore and net profit of ₹6,412 crore. Our industry-leading EBITDA margin of 62%, strong cash generation, and robust balance sheet underscore our focus on financial discipline and productivity. We remain committed to investing in growth, maintaining financial resilience, and creating long-term shareholder value.” Financial Summary Particulars 2Q 1Q 1H (In ₹ crore or as FY2027 FY2026 Change FY2027 Change FY2027 FY20276 Change stated) Sales1 Zinc 8,224 5,354 54% 7,304 13% 15,528 10,289 51% Lead 1,130 840 35% 1,086 4% 2,216 1,712 29% Silver 4,111 1,706 141% 3,839 7% 7,950 3,133 154% Others 1,628 649 151% 1,518 7% 3,146 1,186 165% Total 15,093 8,549 77% 13,747 10% 28,840 16,320 77% EBITDA 9,285 4,467 108% 8,074 15% 17,359 8,328 108% EBITDA Margin 62% 52% - 59% - 60% 51% - Net Profit (after 6,412 2,649 142% 5,469 17% 11,881 4,883 143% exceptional items) Earnings per Share2 15.2 6.3 142% 12.9 17% 28.1 11.6 143% Zinc CoP excluding 703 994 (29%) 851 (17%) 776 1,002 (23%) royalty ($/MT) Note: all numbers reported are consolidated numbers unless otherwise mentioned 1. Including other operating income; 2. ₹, not annualised Revenue: ▪ Revenue from operations stood at ₹ 15,093 crore during the quarter, up 77% YoY, driven by higher metal prices, increased metal production, higher by-product realisation, and a stronger dollar. EBITDA: ▪ EBITDA stood at ₹ 9,285 crore during the quarter, up 108% YoY, driven by increased metal production, higher metal prices, lower cost of production, and a stronger dollar. ▪ The Company continues to maintain an attractive industry leading EBITDA margin of 62% during the quarter, up c.900 bps YoY. Net Profit: ▪ During the quarter, net profit stood at ₹ 6,412 crore, up 142% YoY in line with record EBITDA. The effective tax rate for the quarter was 25.20%. Zinc Cost of Production (COP): ▪ Zinc COP excluding royalty stood at $ 703 per tonne during the quarter, better by 29% YoY on account of better mined grades, increased metal production, better renewable power consumption and higher by-product realisations, partly offset by lower domestic coal usage and increased input commodities prices in line with the ongoing geopolitical crisis globally. Liquidity and Investment ▪ As on September 30, 2026, the Company had healthy gross investments and cash of ₹ 17,439 crore. Total borrowings outstanding as on September 30, 2026, was ₹ 6,171 crore. ▪ Company has consistent Investment grade credit rating of AAA from CRISIL, demonstrating the strength of the balance sheet. Earnings Call on Monday, October 19, 2026, at 16:00 hours (IST) The senior management will discuss the Company’s results and performance on the earnings conference call. Conference Dial-In Information (Please dial in at least 5-10 minutes prior to the conference schedule): Express Join via internet registration Universal Access +91 22 6280 1340, +91 22 7115 8241 Playback Dial-In Numbers +91 22 7194 5757 October 19 – October 26, 2026 Playback Code: 09007# For further information, please contact: Raksha Jain Rahul Challa Maitreyee Sankhla Director - Investor Relations Dy Manager - Investor Relations Head Corporate Communications raksha.jain@vedanta.co.in hzl.ir@vedanta.co.in maitreyee.sankhla@vedanta.co.in About Hindustan Zinc Hindustan Zinc Limited (BSE: 500188 and NSE: HINDZINC), a Vedanta Group company, is the world’s largest integrated zinc producer and is amongst the top 10 silver producers globally. The company supplies to more than 30 countries and holds a market share of about 74% of the primary zinc market in India. Hindustan Zinc has been recognized as the world’s most sustainable company in the metals and mining category for the third consecutive year by the S&P Global Corporate Sustainability Assessment 2025, reflecting its operational excellence, innovation, and leading ESG practices. The company also became the first Indian company to join the prestigious International Council on Mining & Metals (ICMM) in 2025. The company also launched EcoZen, Asia’s first low carbon ‘green’ zinc brand, produced using renewable [Showing first 8,000 characters — download PDF for full document]