Marsh McLennan is the world's largest insurance broker and risk advisor, operating through four segments: Marsh (commercial P&C brokerage, ~45% of revenue), Guy Carpenter (reinsurance brokerage, ~15%), Mercer (HR consulting and retirement services, ~30%), and Oliver Wyman (management consulting, ~10%). The company generates recurring, fee-based revenue from placing insurance and providing advisory services to corporate clients globally, with minimal balance sheet risk.
Financial ServicesInsurance Brokerage & Risk Advisorymoderate - Compensation represents ~60% of revenue (variable with headcount), but technology infrastructure, office footprint, and senior management are fixed. Revenue growth from rate increases and market expansion flows through at higher incremental margins. However, talent-intensive model limits margin expansion compared to asset-light software businesses.