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Nexa Reports 2025 First Half Exploration Results

Luxembourg, Luxembourg--(Newsfile Corp. - July 29, 2025) - Nexa Resources S.A. (NYSE: NEXA) ("Nexa Resources", "Nexa", or "Company") is pleased to announce the drilling and assay results for the first half of 2025. This document contains forward-looking statements.

Summary

Nexa's 2025 drilling strategy prioritized three key areas: near-mine expansion, brownfield and infill drilling, and greenfield exploration of promising projects.

At the end of the first half of 2025, drilling totaled 131,910 meters, comprising: 28,145 meters of exploration drilling and 103,765 meters of mining infill drilling.

Exploration drilling in Peru totaled 14,281 meters (with ten rigs), 13,208 meters in Brazil (with five rigs), 656 meters in Namibia (with one rig), and 9,030 meters dedicated to early-stage greenfield projects in Peru (with eight rigs). For the second half of 2025, planned drilling includes 28,595 meters in Peru (with ten rigs) and 18,650 meters in Brazil (with eleven rigs), totaling 47,245 meters.

Highlights

• Cerro Lindo, Orebody 8C: 4.2 meters at 2.92% Zn, 0.30% Pb, 0.16% Cu, and 33.26 g/t Ag in drill hole PECLD07895 from 561.0 meters.
• Aripuanã, Massaranduba target: 10.8 meters at 7.59% Zn, 3.30% Pb, 0.18% Cu and 62.03 g/t Ag, including 4.8 meters with 16.60% Zn, 5.50% Pb, 0.11% Cu and 68.71 g/t Ag in drill hole BRAPD000224 from 299.6 meters.
• Vazante (Conexão Sucuri Norte) target: 6.3 meters at 22.14% Zn, 0.19% Pb and 16.57 g/t Ag in drill hole BRBVZEND000079 from 426.1 meters.
• El Porvenir (Integración) target: 18.6 meters at 2.83% Zn, 1.87% Pb, 0.07% Cu, 69.01 g/t Ag and 1.40 g/t Au in drill hole PEEPD03012 from 210.0 meters.

Commenting on the report, Jones Belther, Senior Vice President of Technical Services & Business Development, stated: "In the first half of 2025, we delivered 85% of our planned exploration drilling, primarily due to: adverse weather conditions and operational delays in deviation drilling at Cerro Lindo, as well as challenges posed by karstic terrain in Vazante, completing 28,145 meters. Our brownfield exploration programs advanced steadily, focusing on expanding our portfolio and aiming at future extension of the life of our mines. In terms of key achievements: at Cerro Lindo, drilling continued to confirm the depth and continuity of mineralization in Orebody 8C; at Aripuanã, exploration of the Massaranduba target, located 3 km southeast of Babaçu, continued to confirm promising intercepts and continuity of mineralization; at Vazante, results confirmed mineralization at the Conexão Sucuri Norte target; and at El Porvenir, exploration continued to confirm the expansion of the mineralized zone at the Integración target. For the second half of the year, we plan to drill 47,245 meters, with a focus on Peru."

For a full version of this document, please go to our Investor Relations website at: .

About Nexa

Nexa is a large-scale, low-cost, integrated polymetallic producer, zinc being our main product, with over 65 years of experience developing and operating mining and smelting assets in Latin America. Nexa currently owns and operates four long-life underground polymetallic mines, two located in the Central Andes region of Peru, and two located in Brazil (one in the state of Minas Gerais and one in the state of Mato Grosso). Nexa also owns and operates one low-cost polymetallic open pit mine, also in the Central Andes region of Peru, and three smelters, two located in the state of Minas Gerais in Brazil (Três Marias and Juiz de Fora), and one, located in Lima, which is Cajamarquilla, the largest smelter in the Americas.

Nexa was among the top five producers of mined zinc globally in 2024 and one of the top five metallic zinc producers worldwide in 2024, according to Wood Mackenzie.

Cautionary Statement on Forward-Looking Statements

This news release contains certain forward-looking information and forward-looking statements as defined in applicable securities laws (collectively referred to in this news release as "forward-looking statements"). All statements other than statements of historical fact are forward-looking statements. The words "believe," "will," "may," "may have," "would," "estimate," "continues," "anticipates," "intends," "plans," "expects," "budget," "scheduled," "forecasts" and similar words are intended to identify estimates and forward-looking statements. Forward-looking statements are not guarantees and involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of NEXA to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Actual results and developments may be substantially different from the expectations described in the forward-looking statements for a number of reasons, many of which are not under our control, among them, the activities of our competition, the future global economic situation, weather conditions, market prices and conditions, exchange rates, and operational and financial risks. The unexpected occurrence of one or more of the abovementioned events may significantly change the results of our operations on which we have based our estimates and forward-looking statements.

Our estimates and forward-looking statements may also be influenced by, among others, legal, political, environmental or other risks that could materially affect the potential development of our projects, including risks related to outbreaks of contagious diseases or health crises impacting overall economic activity regionally or globally, as well as risks relating to ongoing or future investigations by local authorities with respect to our business and operations and the conduct of our customers, including the impact to our financial statements regarding the resolution of any such matters.

Our estimates and forward-looking statements may also be influenced by regulatory changes in the countries where we operate, including new trade restrictions, tariff escalations, and policy shifts affecting cross-border commerce and supply chains. Certain forward-looking statements are based on third-party data, market forecasts, and assumptions that may be subject to change. Nexa does not guarantee the accuracy of such external data and disclaims any obligation to update these statements unless required by law.

These forward-looking statements related to future events or future performance and include current estimates, predictions, forecasts, beliefs and statements as to management's expectations with respect to, but not limited to, the business and operations of the Company and mining production our growth strategy, the impact of applicable laws and regulations, future zinc and other metal prices, smelting sales, CAPEX, expenses related to exploration and project evaluation, estimation of mineral reserves and/or mineral resources, mine life and our financial liquidity.

Forward-looking statements are necessarily based upon a number of factors and assumptions that, while considered reasonable and appropriate by management, are inherently subject to significant business, economic and competitive uncertainties and contingencies and may prove to be incorrect. Statements concerning future production costs or volumes are based on numerous assumptions of management regarding operating matters and on assumptions that demand for products develops as anticipated, that customers and other counterparties perform their contractual obligations, full integration of mining and smelting operations, that operating and capital plans will not be disrupted by issues such as mechanical failure, unavailability of parts and supplies, labor disturbances, interruption in transportation or utilities, adverse weather conditions, and that there are no material unanticipated variations in metal prices, exchange rates, or the cost of energy, supplies or transportation, among other assumptions.

We assume no obligation to update forward-looking statements except as required under securities laws. Estimates and forward-looking statements involve risks and uncertainties and do not guarantee future performance, as actual results or developments may be substantially different from the expectations described in the forward-looking statements. Further information concerning risks and uncertainties associated with these forward-looking statements and our business can be found in our public disclosures filed under our profile on SEDAR+ () and on EDGAR ().

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