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Marsh McLennan Reviews

New York, New York

5.0/ 5

2 reviews

Marsh McLennan (doing business as Marsh) is a leading global professional services firm headquartered in New York City, specializing in the areas of risk, strategy, and people. Founded in 1905 by Henry W. Marsh and Donald R. McLennan following a merger of their respective businesses, the company traces its roots back to 1871 in the aftermath of the Great Chicago Fire. Today, Marsh McLennan operates as a prominent multinational enterprise with a workforce of over 95,000 colleagues advising clients across more than 130 countries. The firm generates substantial financial scale, with annual revenues exceeding $27 billion. The company's operational architecture is organized into two primary segments: Risk and Insurance Services, and Consulting. These segments are managed through four market-leading global businesses that collectively provide end-to-end operational and strategic solutions. Under the Risk and Insurance Services segment, Marsh functions as the flagship insurance brokerage and risk advisory business. It serves businesses, public entities, and multinational organizations by providing commercial insurance broking, alternative risk financing, and risk consulting. Guy Carpenter (rebranded as Marsh Re in some contexts) operates within this segment as a top-tier reinsurance intermediary, delivering risk and capital strategies to insurance companies. Together, these entities utilize extensive data assets and proprietary analytics to help clients quantify risk, improve resilience, and navigate complex exposures such as cyber threats, climate risk, and geopolitical instability. The Consulting segment consists of Mercer and Oliver Wyman. Mercer is a premier provider of talent, health, retirement, and investment consulting services, helping organizations optimize workforce strategies and enhance benefits for more than 115 million people daily. Oliver Wyman delivers specialized management, strategic, economic, and brand consulting across multiple industries, helping executive teams optimize business operations, manage large-scale corporate transformations, and accelerate performance. Marsh McLennan's competitive edge centers on its deep data ecosystems, global placement power, and robust cross-brand integration, which allow it to offer comprehensive advice and transactional capabilities to clients of all sizes. The company has historically expanded its market share through disciplined strategic acquisitions, including the notable purchase of Jardine Lloyd Thompson (JLT) in 2019 and a $7.75 billion acquisition of McGriff Insurance Services in late 2024. In January 2026, the company underwent a corporate rebranding initiative to consolidate its diverse subsidiaries under the unified Marsh brand identity. Publicly traded on the New York Stock Exchange under the ticker MMC, the corporation remains a critical architect of corporate resilience and stability globally.