MESSAGE FROM OUR ESG COMMITTEE CHAIR Dear colleagues, clients and shareholders, The environmental, social and In that spirit, I am proud to introduce governance (ESG) landscape has Marsh McLennan’s third annual rapidly evolved since our first ESG ESG Report, which builds off the report in 2020. From shareholder groundwork laid in the past two engagement to emerging regulations, years to increase transparency of the expectations on companies the tangible outcomes of our ESG and their Boards to respond to initiatives. In this year’s report, we stakeholders on ESG matters is have expanded our disclosures to becoming increasingly complex. better connect the dots between Marsh McLennan considers the strategy and results — from viewpoints of all our stakeholders, additional metrics to show progress including our shareholders, colleagues, on our diversity, inclusion and clients and the communities where we belonging initiatives, to reaching our live and work. Throughout the year, our initial goal of more than 30% female Board collaborates with management representation on our Board. to continually evaluate and shape our We believe this allows our various ESG strategy to be responsive to these stakeholders to better track the various needs. Importantly, the Board company’s performance against works with management, not just to our commitments. develop a clear vision of what Marsh Marsh McLennan has made great McLennan’s ESG strategy is, but to strides on ESG and is delighted understand how this strategy is actually to present that progress in this We have expanded our disclosures impacting our stakeholders. year’s report. to better connect the dots between Sincerely, strategy and results — from additional metrics to show progress on our diversity, inclusion and belonging initiatives, to reaching our initial goal of more than 30% female representation on our Board.” Lloyd Yates Lloyd Yates Chair, Board ESG Committee, Chair, Board ESG Committee, Marsh McLennan Marsh McLennan Overview Environment Social Governance Appendix 2022 ESG REPORT 3