Materiality Assessment In 2025, with the support of a third party, we updated our previous climate-specific materiality assessment and expanded it to include a broader suite of sustainability topics. The identification of material topics was informed by the International Sustainability Standards Boardʼs (ISSB) standard (IFRS S1) definition of materiality; however, these topics may not be financially material to TMX. The assessment involved both internal and external stakeholders engagements, prior materiality assessment, research and benchmarking. The results will allow us to ensure that our sustainability disclosures, strategy and initiatives are aligned with our enterprise strategy and anchored in material sustainability topics. The output of the assessment also confirmed the continued relevance of the previously identified material risks and opportunities that informs the scope of our disclosures. We will continue to assess and report our material topics to ensure they accurately reflect the key issues of our stakeholders and, that we can adequately mitigate evolving risks and evaluate arising opportunities. To help us prioritize our sustainability initiatives, we have mapped these risks and opportunities, considering their significance to TMXʼs business success and importance to our stakeholders. Importance to Stakeholders Highest Priority Topics • Cybersecurity & Data Privacy • Technology & Operational Resilience High Priority Topics • Corporate Governance • Human Capital • Reputation Priority Topics • Sustainable Finance • Digital Innovation & Artificial Intelligence • Human Rights • Client Preferences & Experience • Geopolitical & Policy • Health & Safety • Climate Risk Management • Regulation & Compliance • Acquisition & Integration Significance to TMX Business Success REPORT CONTENTS ABOUT THIS REPORT SUSTAINABILITY STRATEGY SUSTAINABILITY GOVERNANCE PROSPERITY PLANET PEOPLE APPENDICES 7 | TMX GROUP 2025 ANNUAL SUSTAINABILITY REPORT TMX Group Sustainability Materiality Matrix
RkJQdWJsaXNoZXIy MjgzMzQ=