In addition to current laws, we have a set of standards that are listed in our Code of Ethics and Business Conduct:

• A guide that determines the behaviors that must be followed by our employees, suppliers, and business partners.

Nevertheless, some malicious attitudes may happen, putting not only the Nexa Resources at risk, but also you and other colleagues.

• That's why the Ethics Channel exists! To protect everyone.

Through it, you can report, 100% anonymously, irregularities that do not comply with our values and the laws, helping us maintain a safe and healthy work environment.

The Channel is outsourced, managed by Contato Seguro, an independent and impartial Nexa Resources.

If you identify or are aware of any irregularities:

• Access www.contatoseguro.com.br/en/nexaresources
• Or call:
Brazil 0800 800 1245 e faça o seu relato.
Luxembourg 800 22 925
US and Canada 1 (800) 723-8163
Peru (0800) 70888
• The tool is available 24h/7 days a week.
• The service is provided by specialized psychologists, who receive the report and send the information for analysis, investigation, and resolution.

Yes! The process for receiving the report is conducted entirely by Contato Seguro, a totally exempt organization, with no type of connection with the Nexa Resources.

• Your identity will not be revealed under any circumstances.
• Anonymity and confidentiality of information are guaranteed.
• You will be 100% protected against any retaliation.
• Your telephone number or your computer's IP will not be identified.

You can and must report any attitude that is inconsistent with the laws or with our Code of Conduct or our policies and procedures. Check out the examples:

• Conflict of interests
• Fraud
• Misuse of assets, theft and robbery
• Disclosure of confidential information
• Discrimination and bullying
• Workplace or sexual harassment
• Abuse of power
• Aggression
• Corruption acts
• Compliance topics (Antitrust law, bribery, money laundering and terrorist financing, etc.)
• Topics related to Environmental, Health and Safety at work
• Among other issues

No. Based on your report, Contato Seguro will forward the information to an committee, which will initiate the investigation and deal with the report appropriately. Measures will be taken only after the irregularity is verified.

• If you have any evidence, the system allows you to attach any type of file (such as photos, videos, audios, etc.).
• If you report an issue by phone, the specialist will explain how to send the evidence.

The Ethics Line helps us establish and keep the Nexa Resources safer and free from irregularities, preventing and combating attitudes that could harm us all.

This will result is an increasingly healthy, welcoming, transparent, ethical work environment with more opportunities.

Contato Seguro has a team of psychologists, ready to welcome you. These professionals have no relationship with us, and the process for receiving the report is 100% confidential.

• You are not at any risk of having ypu or your voice identified, revealed, or leaked by anyone.
• Under no circumstances will our Nexa Resources or the committee responsible for the investigation know who made the anonymous report through the Ethics Line.

When reporting an issue, a protocol will be generated. To track the progress, follow the steps below:

1. Access the site contatoseguro.com.br/en/nexaresources
2. Scroll down the page to the Follow up on your report section.
3. Enter your protocol number
4. Click on the arrow to continue.

If the report was made over the phone, the specialist will inform the protocol! Write down the number so you can follow the progress later.

• The committee may request additional information about the report, through messages that can only be accessed through the protocol.