Marsh & McLennan Companies

Marsh & McLennan Companies
Name	Marsh & McLennan Companies
Type	Public
Industry	Professional services
Founded	1905
Founder	Henry W. Marsh; Donald R. McLennan
Headquarters	New York City, New York, United States
Key people	Daniel S. Glaser; John Doyle
Revenue	(2024)
Num employees	(~85,000)

Marsh & McLennan Companies is a global professional services firm headquartered in New York City, with operations spanning risk, strategy, and human capital across multiple continents including London, Tokyo, Sydney, São Paulo, and Singapore. The company traces origins to early 20th-century brokers and has grown through mergers, acquisitions, and the development of prominent subsidiaries interacting with institutions such as World Bank, International Monetary Fund, United Nations, European Union, and major multinational corporations. Its activities intersect with industries represented by Fortune 500, S&P 500, NYSE, Nasdaq, and major sovereign and corporate clients.

History

Founded in 1905 by Henry W. Marsh and Donald R. McLennan, the firm began as an insurance brokerage influenced by practices in Chicago and Boston, later expanding during eras marked by events like the Great Depression, World War II, and the postwar corporate growth that involved transactions tied to Wall Street and institutional investors. During the late 20th century the firm diversified through acquisitions and reorganizations related to players such as Sedgwick, Aon, Willis Towers Watson, and regulatory responses invoking statutes like the Sarbanes–Oxley Act. High-profile incidents and inquiries connected to firms including ACE Limited and CNA Financial shaped corporate reforms, while strategic moves aligned with market changes influenced by indices such as the Dow Jones Industrial Average and MSCI. Globalization in the 1990s and 2000s led to expansion into markets influenced by Asian Financial Crisis, European sovereign debt crisis, and trade patterns overseen by World Trade Organization, prompting integration of advisory capabilities similar to those of McKinsey & Company and Boston Consulting Group.

Corporate structure and subsidiaries

The corporate group comprises distinct subsidiaries each operating under specialized brands and governance, including a leading insurance brokerage, a risk and reinsurance adviser, a professional services consultancy, and human capital advisory units. Subsidiaries have included organizations comparable to Marsh, Guy Carpenter, Mercer, and Oliver Wyman in functional scope, interacting with counterpart firms such as Lloyd's of London, Zurich Insurance Group, Allianz, AXA, Chubb Corporation, and institutional investors like BlackRock and Vanguard Group. Corporate governance and internal controls reference frameworks used by entities such as the Securities and Exchange Commission, Federal Reserve System, Prudential Regulation Authority, and auditing firms in the cohort of Big Four accounting firms including Deloitte, Ernst & Young, KPMG, and PricewaterhouseCoopers.

Services and business segments

The firm's services span risk management and insurance brokerage, reinsurance advisory, management consulting, and human resources and benefit consulting, addressing clients across sectors represented by Fortune 100, NASDAQ-100, Automotive Industry, Pharmaceutical Industry, Financial Services, Energy Sector, and Technology Industry. Client engagements often incorporate methodologies and tools associated with peers such as Oliver Wyman Group-style strategic modeling, actuarial practices akin to those used at Willis Towers Watson, and benefits design comparable to solutions from Aetna and Cigna. The company provides services related to regulatory compliance regimes like Basel III, Solvency II, and frameworks used by International Accounting Standards Board and Financial Accounting Standards Board in financial reporting.

Financial performance and acquisitions

Financial performance has been tracked by analysts at Goldman Sachs, JPMorgan Chase, Morgan Stanley, and rating agencies such as Moody's Investors Service, Standard & Poor's, and Fitch Ratings, with revenue streams reflecting cycles affecting Commodity markets, Foreign exchange market, and global capital flows influenced by Federal Reserve policy and European Central Bank decisions. Major acquisitions and divestitures over the decades mirror activity seen in transactions involving Willis Group, Aon plc, Arthur Andersen-era consolidations, and industry consolidation transactions reviewed under competition authorities such as the Federal Trade Commission and the European Commission. Mergers and purchases have been financed and evaluated using instruments and covenants common to corporate finance practices outlined by International Monetary Fund guidance and investment banking groups like Lazard and Rothschild & Co.

Governance and leadership

Corporate governance has featured boards and executive leadership interacting with institutional investors including BlackRock, State Street Corporation, and activist shareholders such as those historically seen at Elliott Management and Pershing Square Capital Management. Leadership roles have been occupied by CEOs, CFOs, and board chairs experienced in sectors overlapping with Citigroup, JPMorgan Chase, American International Group, and regulatory interfaces with Securities and Exchange Commission and national regulators in United Kingdom, Australia, and Brazil. Executive succession planning, remuneration, and oversight practices reflect standards advocated by organizations like Institutional Shareholder Services and Glass Lewis.

Corporate social responsibility and sustainability

Sustainability and CSR initiatives address climate risk, diversity, equity and inclusion, and social impact, aligning reporting with frameworks from the Task Force on Climate-related Financial Disclosures, United Nations Global Compact, and Sustainable Development Goals. Environmental risk analytics and scenario planning draw on research from institutions such as IPCC, World Resources Institute, UNEP, and partnerships with NGOs like World Wildlife Fund and The Nature Conservancy. Workforce programs and philanthropic efforts mirror best practices promoted by Business Roundtable, B Lab, and corporate citizenship initiatives observed among peers such as IBM and Microsoft.

Category:Companies based in New York City Category:Financial services companies established in 1905