Stakeholder Engagement We continue to engage with our stakeholders to better understand the sustainability issues that are most significant to them. This broad range of perspectives ensures that we can adapt our sustainability initiatives to serve evolving needs and trends. In keeping with our desire to lead in an authentic and purposeful manner, we are balancing this broad range of perspectives with the results of an updated and expanded materiality assessment conducted in early 2025 which are summarized in Materiality Assessment. TMX GROUP LEADERSHIP • Board of directors • Governance and regulatory oversight committee • Human resources committee • Audit committee • Senior management team • Operating committee • Transformation committee CLIENTS AND CUSTOMERS • Sustainability products and tools • Education resources & webinars • Conferences and meetings • Opinion surveys • ESG data and analytics REGULATORS AND GOVERNMENTS • Public policy discussions and advocacy • Standard setting organizations and regulators • Conferences, panels and roundtables • Association memberships OUR PEOPLE • All-employee meetings and town halls • Employee engagement surveys • Intranet and events (in-person and virtual) • Learning and development programs • Performance evaluations • Whistleblower hotline SHAREHOLDERS • Investor outreach, presentations and meetings • Roadshows and conferences • Investor relations website • Annual meeting of shareholders • Quarterly investor calls • Investor surveys OUR COMMUNITIES • Community investment and partnerships • Team Impact and employee volunteering • Market ceremonies • Conferences and events REPORT CONTENTS ABOUT THIS REPORT SUSTAINABILITY STRATEGY SUSTAINABILITY GOVERNANCE PROSPERITY PLANET PEOPLE APPENDICES 6 | TMX GROUP 2025 ANNUAL SUSTAINABILITY REPORT
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