- CEO
- John Q. Doyle
- Full Time Employees
- 95,000
- Sector
- Finance
- Industry
- Insurance brokers/Services
- Address
- 1166 Avenue of the Americas New York NY United States 10036-2774
- IPO Date
- Jun 4, 1969
- Business
- Marsh & McLennan Companies, Inc. engages in risk management, insurance brokerage, and professional services through its four primary operating platforms: Marsh, a global insurance broker and risk management advisor delivering risk assessment, placement, and loss-prevention services; Guy Carpenter, a leading reinsurance broker and advisory firm providing capital, risk transfer strategies, and analytical modeling; Mercer, a curated human resources consulting firm offering health and benefits, retirement, talent management, and employee rewards programs; and Oliver Wyman, a strategy and management consulting practice delivering enterprise-wide transformational consulting, financial services advisory, and specialized services such as economic and analytical research. The company operates globally, with headquarters in New York, NY, and maintains substantial operations across the Americas, Europe, the Middle East, Africa, and Asia-Pacific, serving corporations, public entities, and institutions across multiple industries. Founded in 1906, the company integrates risk, strategy, and people disciplines to help clients anticipate risk, improve performance, and accelerate growth. Core offerings span risk management and insurance services; strategic advisory and reinsurance brokerage; human resources consulting, health and retirement benefits design, and workforce analytics; and management and economic consulting, including specialized industry practices and digital transformation capabilities. The company’s product and service categories include risk assessment and program design; insurance and reinsurance placement; claims and risk analytics; health, retirement, and benefits consulting; talent management and organizational effectiveness; executive compensation and rewards consulting; strategic and financial advisory; operational risk and resilience; product and market strategy; and data-driven research and modeling. Recent strategic developments include ongoing global expansion and a continuous cadence of acquisitions and partnerships to broaden capabilities in specialty insurance, retirement and benefits solutions, and industry-specific consulting, as well as investments in digital platforms and analytics to enhance client outcomes. The latest changes reflect a focus on accretive acquisitions, portfolio optimization, and expansion of advisory footprints in high-growth regions, alongside continued investments in technology-enabled services and integrated risk solutions. The company maintains substantial client relationships across financial services, healthcare, manufacturing, energy, technology, and consumer sectors, servicing multinational corporations, mid-market companies, government and nonprofit organizations, and high-net-worth individuals through its diverse brand ecosystem. Overall, Marsh & McLennan positions itself as a diversified professional services leader combining insurance broking, risk and reinsurance advisory, and broad-based consulting to help clients identify, quantify, and manage risk while pursuing strategic growth and organizational effectiveness.