Ethical practices and high standards of corporate governance are central to how we do business.

Our governance systems provide mechanisms for the evaluation and effective management of our operations, personnel, risks and relationships. We invest in developing our leadership, policies, systems and engagement practices to meet stakeholders’ expectations of being a trusted operator. We believe in clear, comprehensive disclosure and open communication with all of our stakeholders.

We are guided by our Responsible Mining Framework.

From exploration through to operations and closure, we identify and manage our environmental and social impacts across the entire lifecycle of our assets. We are committed to the highest standards of governance, acting ethically and with integrity in every interaction.

Our decision-making process considers all aspects of the business, including economic impacts and opportunities, health and safety, environment, people, host and adjacent communities, our investors, business partners, and society more broadly.

Strengthening our corporate sustainability is a continual focus, led by an Integrated Management System that sets out the policies, standards and business performance that support our vision and values. It’s this holistic approach that enables us to grow and optimize our operations with strong management systems and practices at each level of the company.

Our Code of Conduct, together with the policies that inform our corporate governance and Responsible Mining Framework, are provided below.

1. Articles and Charters

• Articles of OceanaGold Corporation
• Board Charter
• Audit and Risk Committee Charter
• Remuneration, People and Culture Committee Charter
• Governance and Nominations Committee Charter
• Sustainability Committee Charter
• Technical Committee Charter

2. Position Description for the Chairman of the Board

Please refer to the Board Charter for the Company’s position description for the Chairman of the Board.

3. Code of Conduct

• Code of Conduct
• Code of Conduct – Tagalog
• Supplier Code of Conduct
• Supplier Code of Conduct – Tagalog

4. Corporate Governance Policies

• Privacy Policy
• Continuous Disclosure Policy
• Securities Trading Policy
• Whistleblower Policy
• Risk Management Policy
• Anti-Corruption Policy
• Anti-Bribery and Anti-Corruption Standard
• Majority Voting Policy
• Board Renewal Policy
• Share Ownership Policy
• Incentive-based Compensation Clawback Policy
• Advance Notice Policy
• Performance Rights Plan Rules

5. Responsible Mining Policies

• Respect at Work Policy
• Health and Safety Policy
• Environment Policy
• Fair Employment Policy
• Communities Policy
• Human Rights Policy
• Government and Civil Society Policy

Code of Conduct Hotline

All stakeholders can report concerns relating to non-compliance with our Code of Conduct or unacceptable conduct through our independent and confidential 24-hour whistleblower hotline provided by Safecall.

Where disclosures are substantiated, we take appropriate remedial action and advise the reporter on the progress and outcome of the process.

We will not tolerate any form of retaliatory or discriminatory action against anyone who makes a disclosure or participates in an investigation.

Whistleblower Hotline contact details are:

• Australia +61 2 9158 3205
• New Zealand +64 987 15103
• Philippines +63 28 231 2227
• Singapore +65 8004 922689
• United States and Canada +1 888 540 8936
• For all other countries please visit our global telephone numbers page (Safecall link to other numbers – available on hotline website)
  Or visit codeofconducthotline.oceanagold.com

Alternatively, please contact an OceanaGold Whistleblower Protection Officer at [email protected].