Marsh & Mclennan Companies, Inc. revenue by year
Over the 10 fiscal years shown, revenue went from $13.21B (year ended Dec 31, 2016) to $26.98B (year ended Dec 31, 2025), a compound annual growth rate of 8.3%. The fastest growth was +15.1% in the year ended Dec 31, 2021; the weakest year was +3.4% (year ended Dec 31, 2020).
Annual revenue
| Fiscal year ended | Revenue (USD) | Change | XBRL concept | Reported in |
|---|---|---|---|---|
| Dec 31, 2025 | $26.98B | +10.3% | RevenueFromContractWithCustomerExcludingAssessedTax | 10-K filed Feb 9, 2026 |
| Dec 31, 2024 | $24.46B | +7.6% | RevenueFromContractWithCustomerExcludingAssessedTax | 10-K filed Feb 9, 2026 |
| Dec 31, 2023 | $22.74B | +9.7% | RevenueFromContractWithCustomerExcludingAssessedTax | 10-K filed Feb 9, 2026 |
| Dec 31, 2022 | $20.72B | +4.5% | RevenueFromContractWithCustomerExcludingAssessedTax | 10-K filed Feb 10, 2025 |
| Dec 31, 2021 | $19.82B | +15.1% | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 12, 2024 |
| Dec 31, 2020 | $17.22B | +3.4% | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 13, 2023 |
| Dec 31, 2019 | $16.65B | +11.4% | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 16, 2022 |
| Dec 31, 2018 | $14.95B | +6.6% | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 17, 2021 |
| Dec 31, 2017 | $14.02B | +6.2% | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 20, 2020 |
| Dec 31, 2016 | $13.21B | — | RevenueFromContractWithCustomerIncludingAssessedTax | 10-K filed Feb 21, 2019 |
Marsh & Mclennan Companies, Inc. reported revenue under 2 different XBRL concepts across these years (often after the 2018 change in revenue-recognition rules, ASC 606). Each row shows the concept used, so you can judge comparability.
Quarterly revenue
Quarters reported in 10-Q filings. Fourth quarters are usually reported only inside the annual 10-K, so they are not listed separately here; we do not estimate them.
| Quarter | Revenue (USD) | vs same quarter a year earlier | Source |
|---|---|---|---|
| 3 months ended Sep 30, 2026 | $6.86B | +8.1% | 10-Q filed Oct 15, 2026 |
| 3 months ended Jun 30, 2026 | $7.40B | +6.2% | 10-Q filed Jul 21, 2026 |
| 3 months ended Mar 31, 2026 | $7.60B | +7.6% | 10-Q filed Apr 16, 2026 |
| 3 months ended Sep 30, 2025 | $6.35B | +11.5% | 10-Q filed Oct 15, 2026 |
| 3 months ended Jun 30, 2025 | $6.97B | +12.1% | 10-Q filed Jul 21, 2026 |
| 3 months ended Mar 31, 2025 | $7.06B | +9.1% | 10-Q filed Apr 16, 2026 |
| 3 months ended Sep 30, 2024 | $5.70B | +5.9% | 10-Q filed Oct 16, 2025 |
| 3 months ended Jun 30, 2024 | $6.22B | +5.9% | 10-Q filed Jul 17, 2025 |
Source: SEC EDGAR XBRL company facts for CIK 62709 (raw data). Most recent filing in this dataset: 10-Q filed Oct 15, 2026. SEC data file dated Nov 3, 2026; page built Nov 5, 2026. Figures are as most recently reported, including restatements. How we select figures.