Marsh & McLennan Companies Overview
Pro stress-test →Marsh McLennan is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses with annual revenue of over $24 billion and more than 90,000 colleagues. The company operates through four segments: Marsh (53% of 2024 revenues) offering risk management and insurance broking, Marsh Re (10% of 2024 revenues) providing reinsurance intermediary services, Mercer (23% of 2024 revenues) offering HR consulting, and Oliver Wyman (14% of 2024 revenues) providing management consulting services.
Strategic Profile
Pro stress-test →The company created a new Business and Client Services unit to accelerate innovation and centralize investments in operational excellence, data, AI and analytics. Effective January 2026, the company changed its brand to Marsh and its stock ticker symbol became MRSH, reflecting a unified strategy to consolidate market positioning and enhance client impact across its diversified service offerings.
Competitive Landscape
Pro stress-test →Willis Towers Watson, Aon, Lockton Companies, Arthur J. Gallagher & Company, and Hub International are competitors. Marsh & McLennan maintains market leadership through its integrated platform spanning risk management, reinsurance, HR consulting and management consulting. The company differentiates through scale (90,000+ employees), global reach (130 countries), and recent strategic investments in data, AI and operational integration.
Industry Context
Marsh & McLennan Companies operates in Professional Services - Risk Management, Insurance Brokerage, HR Consulting, Management Consulting.
Key facts
Founded: 1905 · Headquarters: New York, US · Employees: 90,000 · Revenue: $27B · Market cap: $92B