Aon Plc (AON)
Aon Market Cap : 70.82B for June 9, 2026
Market Cap Chart
Historical Data
Market Capitalization Definition
Market Capitalization measures the total value of a company based on their stock price multiplied by the shares outstanding. This metric is important because it gives you an idea of the size of a company, and how the size has changed over time. When studying companies from a relative basis, it would make sense to compare companies that have a similar market capitalization because factors like market share, economies of scale, and business models would also be similar.
Market Cap Range, Past 5 Years
Market Cap Benchmarks
| Arthur J. Gallagher & Co. | 55.76B |
| Brown & Brown, Inc. | 19.80B |
| Willis Towers Watson Plc | 24.62B |
| Marsh & McLennan Cos., Inc. | 79.83B |
| Ryan Specialty Holdings, Inc. | 4.304B |
Market Cap Related Metrics
| PE Ratio | 18.19 |
| PS Ratio | 4.084 |
| PEG Ratio | 0.3290 |
| Price to Book Value | 7.201 |
| Price to Free Cash Flow | 20.52 |
| Price | 331.54 |
| Earnings Yield | 5.50% |
| PEGY Ratio | 0.3236 |
| Operating PE Ratio | 14.26 |
| Normalized PE Ratio | 17.14 |