Marsh & McLennan Companies, Inc. MRSH

MRSH Company Overview

Marsh & McLennan Companies, Inc., now branded commercially as Marsh McLennan and traded on the NYSE under the ticker MMC, is a global professional services firm focused on risk, insurance brokerage, reinsurance, strategy consulting, workforce advisory, and investment consulting. The company operates primarily across the insurance, consulting, and human capital advisory industries through four principal businesses: Marsh, Guy Carpenter, Mercer, and Oliver Wyman. Its primary revenue drivers include insurance brokerage commissions and fees, reinsurance advisory services, consulting engagements, health and benefits administration, retirement and wealth advisory services, and management consulting. The company serves multinational corporations, governments, financial institutions, healthcare organizations, mid-sized enterprises, and nonprofit entities across a broad range of sectors.

Marsh McLennan traces its origins to the early 20th century, with Marsh & McLennan formed through the merger of Marsh & McLennan agencies in 1905. Over time, the company expanded from insurance brokerage into consulting and advisory services through acquisitions and organic growth. Major milestones included the development of Mercer into a leading human resources and investment consulting business and the acquisition-driven expansion of Oliver Wyman Group into a global strategy consulting platform. The company’s scale, extensive client relationships, diversified professional services model, and global data and risk analytics capabilities are considered central strategic advantages.