| Segment / region | Type | Fiscal year | Currency | Revenue (millions) | Share of revenue |
|---|---|---|---|---|---|
| UNITED STATES | Region | 2025 | USD | 13,344.0 | 49.3% |
| Other Geographic Areas | Region | 2025 | USD | 9,899.0 | 36.6% |
| UNITED KINGDOM | Region | 2025 | USD | 3,816.0 | 14.1% |
| UNITED STATES | Region | 2024 | USD | 11,671.0 | 47.6% |
| Other Geographic Areas | Region | 2024 | USD | 9,262.0 | 37.8% |
| UNITED KINGDOM | Region | 2024 | USD | 3,595.0 | 14.7% |
| UNITED STATES | Region | 2023 | USD | 10,924.0 | 47.9% |
| Other Geographic Areas | Region | 2023 | USD | 8,319.0 | 36.5% |
| UNITED KINGDOM | Region | 2023 | USD | 3,555.0 | 15.6% |
| UNITED STATES | Region | 2022 | USD | 10,215.0 | 49.2% |
| Europe | Region | 2022 | USD | 3,223.0 | 15.5% |
| UNITED KINGDOM | Region | 2022 | USD | 3,114.0 | 15.0% |
| Asia Pacific | Region | 2022 | USD | 2,537.0 | 12.2% |
| Other Geographic Areas | Region | 2022 | USD | 1,695.0 | 8.2% |
| UNITED STATES | Region | 2021 | USD | 9,343.0 | 47.0% |
| Europe | Region | 2021 | USD | 3,219.0 | 16.2% |
| UNITED KINGDOM | Region | 2021 | USD | 3,130.0 | 15.8% |
| Asia Pacific | Region | 2021 | USD | 2,617.0 | 13.2% |
| Other Geographic Areas | Region | 2021 | USD | 1,565.0 | 7.9% |
| UNITED STATES | Region | 2020 | USD | 8,168.0 | 47.2% |
| Europe | Region | 2020 | USD | 2,881.0 | 16.6% |
| UNITED KINGDOM | Region | 2020 | USD | 2,818.0 | 16.3% |
| Asia Pacific | Region | 2020 | USD | 2,093.0 | 12.1% |
| Other Geographic Areas | Region | 2020 | USD | 1,353.0 | 7.8% |
| Marsh Insurance Group | Product | 2025 | USD | 31,492.0 | 71.7% |
| Mercer Consulting Group | Product | 2025 | USD | 6,190.0 | 14.1% |
| Oliver Wyman Group Consulting Group | Product | 2025 | USD | 3,604.0 | 8.2% |
| Guy Carpenter Reinsurance Group | Product | 2025 | USD | 2,635.0 | 6.0% |
| Risk and Insurance Services Segment | Product | 2024 | USD | 15,395.0 | 62.8% |
| Consulting Segment | Product | 2024 | USD | 9,133.0 | 37.2% |
| Risk and Insurance Services Segment | Product | 2023 | USD | 14,089.0 | 61.8% |
| Consulting Segment | Product | 2023 | USD | 8,709.0 | 38.2% |
| Risk and Insurance Services Segment | Product | 2022 | USD | 12,645.0 | 60.8% |
| Consulting Segment | Product | 2022 | USD | 8,139.0 | 39.2% |
| Risk and Insurance Services Segment | Product | 2021 | USD | 12,085.0 | 60.8% |
| Consulting Segment | Product | 2021 | USD | 7,789.0 | 39.2% |
| Risk and Insurance Services Segment | Product | 2020 | USD | 10,337.0 | 59.7% |
| Consulting Segment | Product | 2020 | USD | 6,976.0 | 40.3% |
Product and geographic breakdowns describe the same revenue from different perspectives and should not be added together.
