 Marsh & McLennan Companies ranked #212 on the 2018 Fortune 500 ranking, the company's 24th year on the annual "Fortune" list, and #458 on the 2017 "Forbes" Global 2000 List.Marsh & McLennan's 2016 revenue of $13.2 billion ranked it #1 on "Business Insurance"'s ranking of the world's largest insurance brokers.Burroughs, Marsh & McLennan was formed by Henry W. Marsh and Donald R. McLennan in Chicago in 1905.