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Colleague Engagement 2022 favorability score from survey At the core of our culture is a sense of community Our business culture prioritizes welcoming everyone and their ideas. We value belonging 80% Favorable and collaboration, and our business success depends on our culture. We care, we listen, we act Marsh McLennan’s annual, enterprise-wide All-Colleague Survey is our opportunity to 14% Neutral understand how we are doing for our colleagues on key measures over time. In 2022, our participation rate was 80%. Our leaders use the survey results to formulate strategies for bolstering the organization’s strengths and addressing its flaws, with the goal of maintaining a committed and enthusiastic 6% Unfavorable workforce. More than 500 leaders receive data specific to their unique organizations, allowing them to tailor their teams’ initiatives. On a larger scale, we use the findings to inform our strategic priorities and investment decisions. This includes areas like learning and development, which are directly related to employee engagement, as well as those that help us remove Completed obstacles for our colleagues, such as technology. 80% our survey The 2022 survey consisted of 55 questions in 11 categories: 2022 colleague feedback • Our environment is welcoming and safe, Core Engagement Supporting Wellness Inclusion & Diversity Ethics & Integrity and our colleagues feel comfortable at work. • New ideas multiply our effect. Our colleagues Leading Strategically Enabling Colleagues Driving Innovation Removing Barriers think critically and challenge the status quo. • Honesty and ethics are the compass points by which we navigate. Our colleagues are Recognizing Creating comfortable voicing their concerns. Performance Opportunities Manager E昀昀ectiveness • We could explore newer technology and continue to eliminate inefficient activities. Our 2022 survey added a new section, “Manager Effectiveness,” with five sub-questions. Overwhelmingly, our people believe that their managers care for their well-being, promote • While some colleagues indicated managing inclusion, provide valuable feedback regularly, and support development, exceeding stress and maintaining work-life balance was a benchmarks on the four of five items where available. challenge, our colleague well-being initiatives were well received. Overview Environment Social Governance Appendix 2022 ESG REPORT 29

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