Marsh & McLennan Companies Inc
Marsh & McLennan Companies, Inc., trading as Marsh McLennan and Marsh, is an American professional services firm headquartered in New York City, with businesses in insurance brokerage, risk management, reinsurance services, talent management, investment advisory, and management consulting. Its four main operating companies are Marsh (54% of 2025 revenues), which offers risk management, insurance broking, insurance program management, risk consulting, analytical modeling, and alternative risk financing services; Marsh Re (formerly Guy Carpenter; 10% of 2025 revenues), a reinsurance intermediary and advisor; Mercer (23% of 2025 revenues), which provides consulting to employers for health insurance, retirement plans, and pension plans; and Oliver Wyman (13% of 2025 revenues), including Lippincott and NERA Economic Consulting, which provides consulting services. In 2024, risk and insurance services contributed a total of 63% of revenues and 71% of operating profit, while consulting contributed 37% of revenues and 29% of operating profit. It is the largest insurance broker worldwide. The company is ranked 175th on the Fortune 500 and 267th on the Forbes Global 2000.
What If You Bought MMC Earlier?
Estimate based on split history only. Excludes dividends, fees, taxes, and intraday movement.
Stock Split History
Newest split first. Cumulative multiple = compounded growth from that date to today.
| Split Date | Price Before | Ratio | Split Multiple | Cumulative |
|---|---|---|---|---|
| Jul 1, 2002 | — | 2-for-1 | 2× | 2× |
Marsh & McLennan Companies Inc Market Cap Timeline
A validated annual market-cap history is unavailable from the current sources. The current market-cap snapshot, when shown above, is not treated as historical evidence. Split markers cover all 1 recorded split. Filled dots have market-cap data for that year; hollow dots mark split years outside market-cap source coverage.
At least two source-validated annual observations are required before this page draws a market-cap timeline. A current snapshot is not treated as historical trend data.