Marsh McLennan
Compare Marsh McLennan…Largest insurance broker — Marsh + Guy Carpenter + Mercer + Oliver Wyman; ~$24B 2024 revenue; fee-based, not balance-sheet risk.
SectorsInsurance
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Marsh McLennanLargest insurance broker — Marsh + Guy Carpenter + Mercer + Oliver Wyman; ~$24B 2024 revenue; fee-based, not balance-sheet risk.
Underlying organic revenue growth % year-over-year, by segment. RIS (Marsh + Guy Carpenter) drives the headline; Consulting (Mercer + Oliver Wyman) is more cyclical and softened in 2024-25 as corporate consulting demand cooled. Both moderated from peak ~10% post-COVID into the 4-5% range as the P&C rate cycle softened.
Q1 2022 — Q1 2026
Source: Marsh McLennan quarterly earnings releases (organic revenue growth disclosures, Q1 2022 - Q1 2026) (Updated: 2026-Q1)
FY2024 revenue (USD millions) across the four operating businesses. Marsh (insurance broking) is the flagship at ~52% of revenue; Mercer (HR consulting) is the second-largest. Total ~$24.5B.
Total: 24.1K stores
Source: Marsh McLennan 2024 10-K (operating company revenue table) (Updated: 2024-FY)
Quarterly breakdown of revenue by product line and service category
2021-Q2 — 2026-Q1
Quarterly breakdown of revenue by geographic region
2021-Q2 — 2026-Q1
Data from SEC filings via FMP • 51 periods available