As of April 2026 Marsh & McLennan Companies has a market cap of โฌ71.72 Billion. This makes Marsh & McLennan Companies the world's 277th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Apr 14th, 2026 the market cap of Marsh & McLennan Companies was reported to be: