As of April 2026 Marsh & McLennan Companies has a market cap of A$123.93 Billion. This makes Marsh & McLennan Companies the world's 260th 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 2nd, 2026 the market cap of Marsh & McLennan Companies was reported to be: