Aon plc (AON)
NYSE: AON · Real-Time Price · USD
295.64
-0.41 (-0.14%)
Sep 18, 2026, 4:00 PM EDT - Market closed
Aon plc Market Cap
Aon plc has a market cap or net worth of $62.71 billion as of September 18, 2026. Its market cap has decreased by -18.76% in one year.
Market Cap
62.71B
Enterprise Value
77.49B
1-Year Change
-18.76%
Ranking
Category
Stock Price
$295.64
ChartMarket Cap Chart
Since December 1, 1998, Aon plc's market cap has increased from $9.85B to $62.71B, an increase of 536.39%. That is a compound annual growth rate of 6.88%.
| Date | Market Cap | % Change |
|---|---|---|
| Sep 18, 2026 | 62.71B | -17.32% |
| Dec 31, 2025 | 75.85B | -2.35% |
| Dec 31, 2024 | 77.67B | 33.31% |
| Dec 29, 2023 | 58.27B | -6.15% |
| Dec 30, 2022 | 62.08B | -6.25% |
| Dec 31, 2021 | 66.22B | 37.11% |
| Dec 31, 2020 | 48.30B | -0.96% |
| Dec 31, 2019 | 48.77B | 39.30% |
| Dec 31, 2018 | 35.01B | 4.55% |
| Dec 29, 2017 | 33.49B | 14.12% |
| Dec 30, 2016 | 29.34B | 16.56% |
| Dec 31, 2015 | 25.17B | -6.90% |
| Dec 31, 2014 | 27.04B | 7.07% |
| Dec 31, 2013 | 25.25B | 42.51% |
| Dec 31, 2012 | 17.72B | 17.13% |
| Dec 30, 2011 | 15.13B | 21.40% |
| Dec 31, 2010 | 12.46B | 18.67% |
| Dec 31, 2009 | 10.50B | -14.78% |
| Dec 31, 2008 | 12.32B | -11.43% |
| Dec 31, 2007 | 13.91B | 27.14% |
| Dec 29, 2006 | 10.94B | -4.87% |
| Dec 30, 2005 | 11.50B | 52.37% |
| Dec 31, 2004 | 7.55B | 0.57% |
| Dec 31, 2003 | 7.51B | 45.60% |
| Dec 31, 2002 | 5.16B | -46.08% |
View and export this data all the way back to 1998. Sign Up Today.
Market Capitalization
Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.
Formula: Market Cap = Stock Price * Shares Outstanding
Related Stocks
| Company | Market Cap |
|---|---|
| Marsh & McLennan Companies | 86.11B |
| Arthur J. Gallagher & Co. | 64.97B |
| Willis Towers Watson | 30.06B |
| Brown & Brown | 22.87B |
| Erie Indemnity Company | 13.28B |
| Ryan Specialty Holdings | 10.15B |
| The Baldwin Insurance Group | 4.46B |
| Accelerant Holdings | 4.31B |