Analysts/Institutional Investor Meet/Con. Call Updates

HZL/2026-27/SECY/57 July 20, 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: Intimation of Earnings Call Pursuant to Regulation 30 read with Para A of Part A of Schedule III of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we are enclosing herewith the details of the earning call to be held on Friday, July 24, 2026, at 16:00 hours IST for the first quarter ended June 30, 2026. 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 Sensitivity: Public (C4) Hindustan Zinc Limited Notice of Results for the First Quarter Ended June 30, 2026 Udaipur, July 20, 2026: Hindustan Zinc Limited, the world’s largest integrated zinc producer, will announce its results for the first quarter ended June 30, 2026, on Friday, July 24, 2026. The results will also be available on the Company’s website, www.hzlindia.com. The Company will subsequently hold an earnings conference on the same day at 16:00 hours IST, where senior management will discuss its results and performance. Hindustan Zinc 1Q FY2027 Earnings Call on Friday, July 24, 2026, at 16:00 hours (IST) Conference Dial-In Information: Express Join via internet registration with no waiting time Please dial the below number at least 5-10 minutes prior to the conference schedule. Universal Access +91 22 6280 1340, +91 22 7115 8241 Playback Dial-In Numbers +91 22 7194 5757 July 24 – July 31, 2026 Playback Code: 09007# For further information, please contact: Raksha Jain Maitreyee Sankhla Director - Investor Relations Head Corporate Communications raksha.jain@vedanta.co.in maitreyee.sankhla@vedanta.co.in Rahul Challa Deputy Manager - Investor Relations hzl.ir@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 40 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 energy. Hindustan Zinc is also a certified 3.32 times Water-Positive company and is committed to achieving Net Zero emissions by 2050 or sooner. The company is also transforming the lives of 2.6 million people through its focused social welfare initiatives. As an energy transition metals company, Hindustan Zinc is pivotal in the journey of sourcing critical metals essential for a sustainable future. Learn more about Hindustan Zinc on - https://www.hzlindia.com/home/ and follow us on LinkedIn, Twitter, Facebook, and Instagram for more updates. Sensitivity: Internal (C3)