2022 ESG Index Disclosure URL or direct response GRI SASB Organization and Reporting Practices Organizational details Marsh McLennan is a public corporation 2-1 Marsh & McLennan Companies, Inc. 1166 Avenue of the Americas, New York, NY About Us, page 5 Our people, page 25 Our internal labor market, page 26 Our workforce, page 27 Corporate governance, page 46 Entities included in the organization’s 2022 10-K, pages 1–7 2-2 sustainability reporting Reporting period, frequency and contact point January 1, 2022 - December 31, 2022 2-3 Marsh McLennan’s ESG reporting follows an annual cycle For questions, please contact [email protected] Restatements of information There are no such restatements for this reporting period 2-4 External assurance None 2-5 Activities and Workers Activities, value chain and other business 2022 10-K, pages 1–7 2-6 relationships Our people, page 25 Our workforce, page 27 Employees Our people, page 25 2-7 SV-PS-000.A Our internal labor market, page 26 Our workforce, page 27 2022 10-K, page 10 Employee engagement as a percentage In 2022, 80% of colleagues who responded were actively engaged SV-PS-330a.3 Colleague engagement, page 29 Workers who are not employees Our workforce, page 27 2-8 Overview Environment Social Governance Appendix 2022 ESG REPORT 64