Performance

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In 2022, Nexa made three public ESG commitments related to GHG emissions, in alignment with the UN 2030 Agenda and the Sustainable Development Goals (SDGs):

• Reduce absolute Scope 1 emissions by 20% (equivalent to 52,000 tons of CO₂e), while maintaining an electricity mix that is predominantly renewable.
• Achieve emissions neutrality by 2040.
• Achieve Net Zero by 2050.

Between 2022 and 2025, we made significant progress in GHG emissions management:

• We automated a large part of data collection.
• We expanded integration with operations through workshops to present and discuss each unit’s inventories.
• We conducted training sessions with specialized consulting firms in 2023 and 2025.
• We achieved Gold Seal Certification in the 2023 and 2024 cycles.
• In 2025, we expanded the third-party verification criteria, moving to on-site audits with reasonable assurance, which are more robust and thorough.

All of this work reinforces our strategic goal of deepening our understanding of our main emission sources and identifying concrete opportunities to reduce Scope 1 emissions. In this process of continuous improvement, we identified the need to adjust the 2020 baseline, considering the current maturity level of the inventory—which now includes more Scope 1 categories—and the divestment of the Morro Agudo unit. The performance analysis indicates that, in the short and medium term, priority actions include developing technological solutions to shift the energy mix, reducing fossil fuel consumption at critical points, and advancing operational efficiency to combat waste. It should be noted, however, that initiatives to change the energy mix involve R&D projects, which naturally present technical and operational risks. These risks are mapped and continuously monitored to ensure their mitigation and the safe progression of the initiatives.

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Nexa implements an integrated environmental management system across all active sites, covering the construction, operation, phased closure, and final closure phases, with the aim of preventing, mitigating, controlling, and monitoring environmental impacts. The corporate Environmental Management System (EMS) ensures compliance with internal standards and applicable legislation, including monitoring of legal requirements, internal and external audits, field inspections, and ongoing training.

The Environmental Management Plans (EMP) and Environmental Management Instruments (EMI), approved by regulatory agencies such as SENACE, MINAM, MEM, and ANA, establish guidelines for air quality management, monitoring of surface and groundwater, solid and hazardous waste, effluents, noise, vibrations, biodiversity, wildlife management, natural resource consumption, and control of hazardous substances. The implementation of these plans ensures that environmental impacts are addressed preventively and that corrective measures are applied immediately when necessary.

Operations include programs for the restoration of degraded areas, biodiversity monitoring, control of air emissions, and water resource management, in order to reduce environmental risks and promote sustainability. The Mine Closure Plan ensures the physical, hydrological, and geochemical stability of the components at the end of the operational cycle and is developed progressively.

For more information, please review our Integrated Management Policy.

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In order to maintain adequate communication channels to report misconduct, we have the Ethics Line. Created to be impartial and transparent, this channel is prepared to receive from the internal and external public reports of possible violations of the Code of Conduct or of any policy, procedure, law or regulation. The Ethics Line is committed to ensuring the confidentiality of the information, safeguarding the identity of any person who accesses it, and promoting the best working environment for everyone. Through it, it is possible to report, totally anonymously, any suspicion of financial crime, fraud, corruption, discrimination, harassment, or other types of ethical violations. The Ethics Line service is available in Portuguese, English, and Spanish, and can be accessed through the Site or by telephone:

• Brasil: 0800 800 1245 (Portuguese);
• Peru: (0800) 70888 (Spanish);
• Estados Unidos & Canadá: 1 (800) 723-8163;
• Luxemburgo: 800 22 925(English and French)

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List of material topics 2025:

• Climate Change
• Compliance and Risk Management for Environmental Incidents
• Corporate Governance and Integrity
• Dams and Waste
• Health and Safety
• Human Capital
• Natural Capital
• Social Management

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We also engage with various stakeholders through our participation in industry associations:

• Brazilian Association for Research & Development at Innovative Companies (ANPEI)
• Brazilian Mining Institute (IBRAM)
• Business Mobilization for Innovation (MEI)
• Innovation Hub
• Institute of Non-Ferrous Metals (ICZ)
• International Zinc Association (IZA)
• Mato Grosso State Industry Federation (FIEMT)
• Minas Gerais State Industry Federation (FIEMG)
• Mining Hub
• Mining Industry Association of Minas Gerais (SINDIEXTRA)
• National Society for Mining, Oil & Energy (SNMPE) – Peru
• Peruvian Institute for Mining Safety (ISEM)
• Senator José Ermírio de Moraes Foundation (FUNSEJEM)
• Union of Mineral Extractive Industries of Mato Grosso (SINDIMINÉRIO)

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Nexa’s management system for the prevention of corruption and bribery is an integrated framework that combines policies, procedures, and controls to identify, mitigate, and monitor corruption risks, promoting integrity in all our operations, negotiations, and interactions with third parties. Starting with the commitment of senior leadership and the implementation of our Code of Conduct, we conduct training sessions on various compliance topics, perform due diligence reviews of partners and suppliers, assess conflicts of interest, and address issues related to donations, sponsorships, gifts/hospitality, and interactions between Nexa representatives and government entities. In addition, we are supported by a reporting channel (Ethics Hotline) to receive reports related to misconduct.

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The company respects the right of association of its employees and third parties, promoting transparent and ethical dialogue in union negotiations. To date, we have not identified any violations of the right to freedom of association in our operations or those of our suppliers.

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Nexa’s Code of Conduct, which is known to all employees, customers, and suppliers, reinforces the company’s stance against child labor and forced or slave-like labor. This risk is also assessed during the due diligence process for our third-party suppliers. Since 2019, we have had no operations or suppliers that pose a risk related to forced or slave-like labor.

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Nexa follows a structured process for hazard identification, risk assessment, and risk control, based on the corporate risk management standard (PG-SUS-SUS-013), which is aligned with ISO 31000, ISO 14001, and ISO 45001. Risk management is applied in layers across all operations, following the continuous improvement cycle (PDCA), with critical analyses, audits, and incident learning supporting decision-making. Operational tools such as APR (Preliminary Risk Analysis) in Brazil and Continuous IPERC in Peru are used in a participatory manner before and during activities, enabling the identification and control of risks in real time. For critical activities, formal permits such as PPT (Permit to Work) and PETAR are applied, ensuring prior assessment and authorization of safety conditions. Workers actively participate in risk management through tools such as Fale Fácil, Right to Refuse, and ORT (Observation of Risks at Work), which allow them to report unsafe conditions, halt activities involving serious risk, and reinforce safe behaviors, without fear of reprisal. The company also promotes training, risk perception workshops, and continuous assessments of working conditions, including specific forms for critical environments, such as underground mines. All incidents are recorded, investigated, and addressed through formal processes, with the definition of corrective and preventive actions and the dissemination of organizational learnings, reinforcing a culture of prevention and the continuous improvement of health and safety performance.

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Nexa provides occupational health services through qualified multidisciplinary teams, in compliance with current legislation in Brazil and Peru and in line with international standards. In Brazil, these services are integrated into the Risk Management Program (PGR), in accordance with NR-1, and are implemented at all facilities. Access for workers is facilitated through on-site care at their workplaces, logistical support for travel to clinics, and clear communication about available services. The effectiveness of these initiatives is monitored through key performance indicators (KPIs) and reinforced by ongoing health awareness and promotion campaigns. The confidentiality of health information is ensured through the Apollus management system, with access restricted to healthcare professionals, the use of encryption, and the adoption of security protocols. Nexa complies with the General Data Protection Law (LGPD) in Brazil and Law No. 29733 in Peru, ensuring that data is used exclusively for medical and preventive purposes. Internal privacy policies, segregation of duties, monitoring, and audits ensure that this information is not used for any type of favorable or unfavorable treatment, promoting transparency, ethics, and trust among employees.

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In addition to complying with regulations, we are concerned with developing a mentality of mutual care and knowledge of the real risks and mitigations within the context of our operations. To provide this learning experience, we use several methodologies for normative training: based on the 6Ds, we use online, face-to-face, hands-on training, Lego Serius Play methodology, VR and VA. In addition to normative training, there are also communication, participation and consultation programs, including:

• Nexa Safety Day: with the motto Zero Harm, the event promotes a culture in the sense of not generating damages, injuries, losses and impacts on the lives of employees.
• Sipat & Sipatmin: a Semana Interna de Prevenção de Acidentes de Trabalho promoveu diversas atividades, webinars e eventos voltados à conscientização de colaboradores próprios e prestadores de serviços sobre a prevenção de acidentes e doenças ocupacionais, estendendo o foco de atenção às famílias
• ORW (Observation of Risks at Work): this safe behavior program seeks to identify and control the risks of activities in the present, so that it is possible to reduce undesirable consequences in the future. The ORT tool is used to assess safe behaviors during the execution of activities, improving the practice of safe behavior.

We strongly believe that by refining our management system tools and implementing effective risk management, we will achieve a level of safety maturity that meets regulatory standards by 2030 and fulfill our three strategic objectives: eliminating fatal accidents; reducing the frequency and severity of personal injuries; and fostering a culture of effective risk management. In total, we trained 12,918 people and provided 56,394 hours of training in 2025 on the topic of safety.

If you would like to learn more about our occupational health and safety management system, please visit Health, Safety and Well-being.

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Nexa promotes the health and well-being of its workers through structured initiatives that are accessible to both direct and contract employees, without any form of discrimination. At its facilities in Brazil, workers have access to the Health Center, where qualified professionals provide care, covering both occupational and non-occupational health services. These initiatives follow defined schedules and comprehensively cover all workers, including permanent contractors, reinforcing the commitment to equitable access to services. Additionally, the company offers health insurance plans through recognized providers, such as Bradesco and Unimed, and provides the Employee Support Program (PAC), which guarantees free support to employees and their families, including psychological counseling. In partnership with the Orienteme program, nutritional and psychological support services are also offered. Nexa complements these initiatives with quality-of-life programs, preventive health screenings, and incentives for physical activity, such as initiatives under the Go Nexa program, contributing to the comprehensive promotion of employees’ health and quality of life.

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Since 2022, Nexa has maintained and continuously improved a robust risk management system for its operational activities, structured according to the G-MIRM (Global Mining Industry Risk Management) methodology developed by the University of Queensland in Australia, with the aim of fostering a strong culture of risk-based decision-making. More than 4,000 employees and 6,000 permanent contractors have already been trained to identify, assess, and manage risks associated with processes, changes, and new projects, as well as routine and non-routine activities and service fronts, applying these concepts in practice through:

• Definition and management of critical controls in Mining and Smelter operations: catastrophic loss scenarios were mapped, and the respective critical controls were established; these are periodically inspected and audited based on reference standards and action plans aimed at continuous improvement.
• Critical risk protocols: protocols with specific requirements to prevent fatalities associated with the main risks present in metallurgical and mining operations are defined, communicated, and reviewed regularly.
• Dynamic risk assessment: Changes in processes, technologies, personnel, or operational conditions undergo a structured change management process, including hazard identification, risk assessment, and definition of necessary controls prior to implementation.
• Task risk assessment: activities are analyzed using management system tools, such as Work Permits and Task Risk Analysis, conducted jointly by leadership and the operators directly involved.
• Creation of reference standards: technical and operational standards are developed and maintained for activities classified as high-risk, guiding procedures, qualification requirements, equipment, and minimum controls.
• Reporting of risk conditions: workers have access to the “Fale Fácil” communication tool to record, in a simple and accessible manner, hazardous situations, near-misses, and opportunities for improvement identified during routine operations.
• Systematic monitoring by leadership: there is a structured schedule for verifying and supporting risk management at all levels of the organization, ensuring the effective use of tools, the quality of analyses, and the implementation of continuous improvement actions.

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Nexa has adopted an Occupational Health and Safety Management System (OH&S) that has been in place for several years, applicable to all of its operations and offices, without exception. This system is guided by corporate guidelines and compliance with the legal requirements of the countries where it operates, such as Brazil and Peru, including the Consolidated Labor Laws (CLT) and Regulatory Standards such as NR-4, NR-5, and NR-22, as well as Law No. 29,783/2011 and Supreme Decrees No. 05-2012 and 24-2016. The OHS area’s operations are organized at the strategic, tactical, and operational levels, with guidelines defined at the corporate level and rolled out to the units, encompassing the development of safety culture programs, definition of responsibilities, risk management, and accident prevention. Safety is treated as a core value of the organization, reinforcing the commitment to the protection of all workers and regulatory compliance. The system is supported by key elements such as the definition of strategy, objectives, and targets aligned with ESG, strengthening leadership and a culture of prevention, compliance with legal requirements, risk management at all levels, continuous training, communication and employee engagement, as well as standardized operational controls. It also includes contractor management, emergency response plans, periodic audits, performance monitoring through indicators, and incident management focused on organizational learning. These practices are implemented through training, inspections, audits, incident investigations, and a continuous pursuit of innovation and technical solutions, ensuring continuous improvement in health and safety performance and the safe conduct of operations.

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Nexa implements robust development and training programs aimed at enhancing the technical, behavioral, and managerial skills of employees and leadership. These programs are grounded in structured policies that guide the creation of learning experiences aligned with organizational strategies and individual needs. The policies establish clear guidelines for identifying needs, planning, executing, evaluating, and documenting training activities, ensuring consistency and effectiveness throughout the process. The scope ranges from specific technical training to enhance operational skills to programs focused on developing leadership competencies, fostering a culture of continuous learning. In addition, Nexa prioritizes initiatives that integrate on-the-job training, workshops, mentoring, and personalized development programs, allowing employees to apply what they learn directly to their roles. In this way, the company strengthens competitiveness, fosters innovation, and ensures operational excellence through the constant development of its human capital. Some of the programs Nexa offers:

• Cultivating Leadership: a development program to train Nexa’s leadership on strategic business topics and strengthen the organizational culture. In 2025, there were three modules, more than 100 classes, and over 600 leaders trained.
• Executive Coaching Program: consisting of 10 sessions with an external professional. In 2025, more than 25 leaders participated.
• Internal Mentoring Program: specifically for women at Nexa, aimed at boosting professional development, strengthening self-confidence, and better preparing them for new challenges and more complex roles through structured exchanges of experiences with leaders and mentors within the organization.

In addition, Nexa has an online learning platform, “Conexa,” with a variety of internal and external content and training courses available to all employees.

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Water is an essential resource for the organization’s operations and is used in various stages of industrial and mining processes, including mineral processing, zinc hydrometallurgy, drilling, road watering, irrigation, human consumption, and equipment washing. Water is sourced from duly authorized surface and groundwater sources, such as the São Francisco and Santa Catarina rivers, the Ribeirão Espírito Santo, the Córrego Arrainha, and the Aroeira dam in Brazil, in addition to the use of desalinated seawater at the Cerro Lindo facility in Peru, thereby reducing pressure on local water resources. Part of the water is treated for human consumption, while raw water is widely used in production processes. Water management includes physical-chemical effluent treatment systems, wetlands, settling basins, and recirculation, aimed at reducing consumption and complying with environmental legislation. Impacts are monitored through ongoing environmental studies, including EIAs and technical investigations, with particular emphasis on the lowering of the water table at the Vazante facility, which has been the subject of studies and mitigation measures in partnership with specialized institutions. The organization maintains strict control over water abstraction and discharge, in addition to engaging in dialogue with stakeholders and implementing environmental education initiatives, reinforcing its commitment to the sustainable use of water as a shared resource.

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The organization incorporates material recycling practices into its operational processes, with a focus on the recirculation of effluents and the reuse of byproducts generated during industrial treatment. The facilities are equipped with industrial and sanitary wastewater treatment plants, where liquid waste undergoes physicochemical processes that remove solids and precipitate metals. Some of the resulting materials, such as sludge and solids containing metals, are reintegrated into the production process or directed to internal systems, reducing the need for primary inputs and promoting greater efficiency in resource use. Furthermore, at facilities where there is no effluent discharge or where the operational strategy prioritizes a closed-loop system, water and associated materials are continuously recirculated, preventing losses and minimizing waste generation. Quality standards for reuse and disposal are defined based on applicable laws and internal guidelines, ensuring that reused materials meet technical, environmental, and operational criteria. This approach reinforces the organization’s commitment to the circular economy, waste reduction, and the sustainable use of natural resources. No facility disposes of materials without defined legal requirements. In addition, operations take into account the characteristics of receiving water bodies and work to mitigate impacts through initiatives such as spring restoration and environmental education in local communities.

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We would like to emphasize that in our operations, both in Brazil and Peru, we do not have any proven or probable reserves located on indigenous lands, in protected conservation areas, or in conflict zones. Nevertheless, within the area of influence of the Aripuanã unit (MT), there are two indigenous territories belonging to the Arara do Rio Branco and Cinta Larga ethnic groups, whose relationship with Nexa is guided by open dialogue, cordial relations, and joint development. In Peru, the Atacocha, El Porvenir, and Cerro Lindo operations are located near Quechua communities, whose recognition as rural communities is recent and occurred after the start of our operations. The Quechua people are part of the rural communities in our areas of influence. We maintain commitments to social investments with these communities and their representatives, conducting consultations and participatory approvals for these investments. Furthermore, the Quechua people play an active role in projects carried out in their territories, working collaboratively to promote the development and well-being of their communities.

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Nexa follows structured processes for engagement and human rights due diligence, with a particular focus on managing relationships with Indigenous peoples in Brazil, as governed by internal procedure PG-GGS-GSBR-014-PT. This procedure establishes guidelines for identifying indigenous territories, conducting environmental licensing processes, and preparing specific studies, such as the Indigenous Component Study (ECI) and the Basic Environmental Plan for the Indigenous Component (PBACI), in addition to implementing and monitoring associated measures. All stages are grounded in International Labour Organization Convention No. 169, the principle of Free, Prior, and Informed Consent (FPIC), and international standards, such as those of the IFC. In 2024, the company conducted a comprehensive assessment of its human rights-related processes and is currently drafting its Human Rights Policy. The due diligence approach is complemented by a set of policies, procedures, and corporate initiatives, including the Risk Management Policy and Manual, codes of conduct for employees and suppliers, a reporting channel (Ethics Hotline), community engagement procedures, and mechanisms for handling complaints. Nexa is also committed to international initiatives such as the Global Compact, the Sustainable Development Goals, the Business and LGBTI+ Rights Forum, and Women in Mining. Although it does not operate in conflict or high-risk areas, the company recognizes potential associated risks and takes preventive action by strengthening its governance, structuring its human rights policy, and implementing due diligence practices throughout its value chain, ensuring ethical, transparent operations aligned with international best practices.

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