Compare
Arthur J. Gallagher & Co. vs Aon plc vs Willis Towers Watson PLC vs Marsh & McLennan Companies, Inc.
| Latest fiscal year | Arthur J. Gallagher & Co. AJG | Aon plc AON | Willis Towers Watson PLC WTW | Marsh & McLennan Companies, Inc. MRSH |
|---|---|---|---|---|
| Year ended | 2025-12-31 | 2025-12-31 | 2025-12-31 | 2025-12-31 |
| Revenue | $13.94B | $17.18B | $9.71B | $26.98B |
| Revenue growth (YoY) | +20.7% | +9.4% | -2.2% | +10.3% |
| Gross margin | n/a | n/a | n/a | n/a |
| Operating margin | n/a | 25.3% | 23.0% | 23.1% |
| Net margin | 10.7% | 21.8% | 16.5% | 15.4% |
| Net income | $1.49B | $3.75B | $1.60B | $4.16B |
| EPS (Diluted) | $5.74 | $17.02 | $16.26 | $8.43 |
| Operating cash flow | $1.93B | $3.48B | $1.77B | $5.29B |
| Free cash flow | n/a | $3.22B | $1.55B | $5.00B |
| Cash & equivalents | n/a | $1.20B | $3.13B | $2.69B |
| Total assets | $70.67B | $50.78B | $29.53B | $58.71B |
| Total liabilities | $47.32B | $41.24B | $21.48B | n/a |
| Shareholders' equity | $23.32B | $9.46B | $7.98B | $15.31B |
| Return on year-end equity | 6.4% | 39.6% | 20.1% | 27.2% |
| Shares outstanding | 257.00M | n/a | n/a | 485.00M |
Revenue, most recent five fiscal years
| Fiscal year | Arthur J. Gallagher & Co. | Aon plc | Willis Towers Watson PLC | Marsh & McLennan Companies, Inc. |
|---|---|---|---|---|
| Latest | $13.94B Ended 2025-12-31 | $17.18B Ended 2025-12-31 | $9.71B Ended 2025-12-31 | $26.98B Ended 2025-12-31 |
| 1 year earlier | $11.55B Ended 2024-12-31 | $15.70B Ended 2024-12-31 | $9.93B Ended 2024-12-31 | $24.46B Ended 2024-12-31 |
| 2 years earlier | $10.07B Ended 2023-12-31 | $13.38B Ended 2023-12-31 | $9.48B Ended 2023-12-31 | $22.74B Ended 2023-12-31 |
| 3 years earlier | $8.55B Ended 2022-12-31 | $12.48B Ended 2022-12-31 | $8.87B Ended 2022-12-31 | $20.72B Ended 2022-12-31 |
| 4 years earlier | $8.21B Ended 2021-12-31 | $12.19B Ended 2021-12-31 | $9.00B Ended 2021-12-31 | $19.82B Ended 2021-12-31 |