Marsh & McLennan Companies, now operating under the name Marsh McLennan, is a global professional services firm that provides advice and solutions in risk, strategy and people. The company serves businesses, governments and institutions through four principal businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman.
Marsh is an insurance brokerage and risk adviser that helps clients identify, manage and transfer risk. Guy Carpenter provides reinsurance brokerage and advisory services to insurance companies. Mercer offers consulting and technology solutions focused on investments, retirement, health and benefits, and talent. Oliver Wyman is a management consulting firm serving clients across industries, including financial services, transportation, energy and healthcare.
Founded in 1905, Marsh McLennan serves clients through operations and offices across North America, Latin America, Europe, Asia-Pacific, the Middle East and other international markets. John Doyle has served as the company’s president and chief executive officer since 2023. The company’s common stock trades on the New York Stock Exchange under the symbol MMC; MRSH is not the company’s NYSE ticker.
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