Marsh & McLennan Companies, Inc.
- Industry
- Insurance Brokerage
- Exchange
- US
- Country
- USA
- IPO date
- Dec 30, 1987
- Employees
- 95,000
- Website
- www.corporate.marsh.com
Composite valuation range · conservative $125–$145 / fair $165–$195 / optimistic $225–$255. At $183.31, Within the fair intrinsic-value range.
At publication $164.11 (May 26, 2026)
Data from EODHD, shown in the reporting currency; for reference only, not investment advice.
Marsh & McLennan Companies, Inc., a professional services company, provides advisory services and insurance solutions to clients in the areas of risk, strategy, and people worldwide. The company operates through Risk and Insurance Services, and Consulting segments. The Risk and Insurance Services segment offers risk management services, such as risk management, insurance broking, insurance program management, risk consulting, analytical modeling, and alternative risk financing services. This segment also offers insurance and reinsurance broking, strategic advisory and actuarial services, and analytics solutions. It serves businesses, public entities, insurance companies, associations, professional services organizations, and private clients. The Consulting segment provides health, wealth and career advice, solutions and products; and specialized management, strategic, economic, and brand consulting services. Marsh & McLennan Companies, Inc. was founded in 1871 and is headquartered in New York, New York.
History
Marsh & McLennan Companies, Inc. was founded in 1871 and is headquartered in New York. The company completed its IPO on December 30, 1987. In 2004 it was involved in a bid-rigging scandal and paid an $850 million settlement in 2005. John Q. Doyle became group CEO on January 1, 2023. At the end of 2024 the company completed its $7.75 billion acquisition of McGriff, and in late 2025 it authorized a new $6 billion share buyback, of which $750 million was executed in the first quarter of 2026.
Industry position
Marsh & McLennan Companies is the world's largest insurance broker, with Aon ranked second and WTW and Arthur J. Gallagher following. It operates through the Risk and Insurance Services and Consulting segments, built around four units: Marsh (54% of 2025 revenue), Marsh Re (10%), Mercer (23%), and Oliver Wyman (13%); 2025 risk and insurance revenue was about $17.3 billion and consulting about $9.8 billion. The company reported about $26.981 billion in 2025 revenue, versus Aon's $15.7 billion (2024), Gallagher's $13.9 billion (2025), and WTW's $9.93 billion (2024), and employs about 95,000 people.