Marsh McLennan is a global professional services firm specializing in risk, strategy, and people. Operating in over 130 countries with more than 85,000 employees, the company offers a comprehensive suite of services through its four main subsidiaries: Marsh, Guy Carpenter, Mercer, and Oliver Wyman.

Subsidiaries and Services

Marsh is a leader in insurance broking and risk management, providing services such as strategic, cyber, property, casualty, enterprise risk management, and crisis management.

Guy Carpenter specializes in reinsurance brokerage, capital modeling, catastrophe risk management, and strategic advisory services.

Mercer offers human resources consulting, health and benefits administration, retirement and investment consulting, and talent management services.

Oliver Wyman provides corporate strategy, operations improvement, organizational design, and economic consulting services.

Recent Acquisition

In September 2024, Marsh McLennan announced an agreement to acquire McGriff Insurance Services for $7.75 billion, aiming to enhance its capabilities across various insurance lines. These include commercial property, casualty, employee benefits, and personal insurance.

Locations

The company is headquartered at 1166 Avenue of the Americas, New York, NY 10036, USA.

It also has offices in California, including:

Aliso Viejo
San Francisco
San Diego

Additionally, Marsh McLennan maintains a presence in New York, NY, USA.

Stock Market Information

As of July 3, 2025, Marsh McLennan's stock (NYSE: MMC) is trading at $212.72, reflecting a slight decrease of 2.37% from the previous close.

Current price: 212.72 USD
Change: -5.16 USD (-0.02%) from previous close
Latest open price: 216.44 USD
Intraday volume: 3,994,317 shares
Intraday high: 217.75 USD
Intraday low: 210.57 USD
Latest trade time: Wednesday, July 2, 17:19:00 PDT

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