Wesdome Gold Mines Ltd. (Wesdome or the “Company”) prepared this report in alignment with the Sustainability Accounting Standards Board (SASB) Metals & Mining Standard, and the recommendations of the Task Force on Climate-Related Financial Disclosures (TCFD). This report has also been prepared with reference to the Global Reporting Initiative (GRI) Standards (2021) and GRI 14: Mining Sector Standard (2024).

This is Wesdome’s seventh Environmental, Social and Governance (ESG) Report, and describes our ESG and sustainability performance for the year ending December 31, 2025. The report describes our management approach and performance across a range of material ESG topics associated with our business. While focusing primarily on financially material factors, it also covers sustainability aspects of our mining operations that are relevant to rightsholders and stakeholders. The report covers the same 14 material topics covered in our 2024 ESG Report, which were validated during our last materiality assessment review in early 2025. More information on the management of material ESG topics is also available on our website.

The scope of this report covers our two operating assets, the Eagle River Mine (Eagle River) in Ontario, Canada, and Kiena Mine (Kiena) in Québec, Canada. It also covers our regional exploration activities, which are conducted adjacent to our operations and are managed from our corporate office in Toronto, Canada.

This report has been reviewed by the Wesdome Senior Leadership Team (SLT) and the Technical, Safety and Sustainability Committee (TSSC) of the Wesdome Board of Directors.

Additional discussion on our material ESG factors and risk management approaches is also available in our Annual Information Forms, Annual General Meeting materials, NI 43-101 technical reports, exploration results disclosures, quarterly and annual financial performance results, Extractive Sector Transparency Act (ESTMA) filings, quarterly webcasts, corporate presentations and news releases. These documents are available on our website or upon request.

We obtained third-party verification of our 2025 greenhouse gas (GHG) emissions, and we continue to explore a variety of verification options for select, high-priority material ESG areas in the future.

Unless otherwise indicated, all financials are expressed in Canadian Dollars.

The SASB, TCFD, and GRI content indices, which accompany the report, and Wesdome’s ESG Data Tables are available on Wesdome’s website.

We welcome your feedback and invite you to email our Vice President, Sustainability & Environment, Joanna Miller at joanna.miller@wesdome.com.