Company Story
1871 - Henry W. Marsh and Donald R. McLennan founded Marsh & McLennan Companies, Inc. in Chicago, Illinois.
1902 - The company expanded to New York City and established its headquarters.
1923 - Marsh & McLennan Companies, Inc. went public with an initial public offering (IPO).
1969 - The company acquired the insurance brokerage business of Johnson & Higgins.
1997 - Marsh & McLennan Companies, Inc. acquired Sedgwick Group, a UK-based insurance broker.
2004 - The company acquired Kroll Inc., a risk consulting firm.
2011 - Marsh & McLennan Companies, Inc. acquired the reinsurance brokerage business of HSBC Insurance Brokers.
2019 - The company acquired Jardine Lloyd Thompson Group plc, a UK-based insurance broker.