Current
$70.98B
5-Year Average
$68.65B
All-Time High
$89.35B
All-Time Low
$4.04B
Market cap daily chart for Aon (AON)
Jun 16, 2021 – Jun 15, 2026 · 1,255 trading days
Market Cap growth chart for Aon (AON) from 1985 to 2026
Latest: -7.1%
Market Cap history table for Aon (AON) from 1985 to 2026
| 2026 | $70.98B | -7.1% | −$5.42B | ||
| 2025 | $76.40B | +0.1% | +$77.02M | ||
| 2024 | $76.32B | +27.9% | +$16.66B | ||
| 2023 | $59.66B | -6.8% | −$4.33B | ||
| 2022 | $63.99B | -5.8% | −$3.97B | ||
| 2021 | $67.96B | +38.0% | +$18.71B | ||
| 2020 | $49.25B | -1.7% | −$867.54M | ||
| 2019 | $50.11B | +39.6% | +$14.21B | ||
| 2018 | $35.90B | +2.8% | +$970.12M | ||
| 2017 | $34.93B | +15.9% | +$4.79B | ||
| 2016 | $30.15B | +15.2% | +$3.98B | ||
| 2015 | $26.17B | -7.9% | −$2.24B | ||
| 2014 | $28.41B | +7.4% | +$1.95B | ||
| 2013 | $26.46B | +43.1% | +$7.96B | ||
| 2012 | $18.50B | +15.9% | +$2.54B | ||
| 2011 | $15.95B | +16.3% | +$2.24B | ||
| 2010 | $13.72B | +22.9% | +$2.55B | ||
| 2009 | $11.16B | -18.8% | −$2.58B | ||
| 2008 | $13.75B | -10.8% | −$1.66B | ||
| 2007 | $15.40B | +27.4% | +$3.31B | ||
| 2006 | $12.09B | -1.5% | −$187.11M | ||
| 2005 | $12.28B | +52.9% | +$4.25B | ||
| 2004 | $8.03B | +5.6% | +$423.14M | ||
| 2003 | $7.61B | +40.1% | +$2.18B | ||
| 2002 | $5.43B | -43.7% | −$4.22B | ||
| 2001 | $9.65B | +6.4% | +$581.16M | ||
| 2000 | $9.07B | -13.7% | −$1.44B | ||
| 1999 | $10.51B | +9.7% | +$930.95M | ||
| 1998 | $9.58B | -4.3% | −$427.43M | ||
| 1997 | $10.00B | +43.1% | +$3.01B | ||
| 1996 | $6.99B | +28.9% | +$1.57B | ||
| 1995 | $5.42B | +59.6% | +$2.03B | ||
| 1994 | $3.40B | -0.8% | −$29.04M | ||
| 1993 | $3.43B | -12.0% | −$469.21M | ||
| 1992 | $3.90B | +50.8% | +$1.31B | ||
| 1991 | $2.58B | +12.3% | +$282.15M | ||
| 1990 | $2.30B | -17.0% | −$470.44M | ||
| 1989 | $2.77B | +54.4% | +$976.09M | ||
| 1988 | $1.79B | +18.8% | +$283.80M | ||
| 1987 | $1.51B | -13.5% | −$236.52M | ||
| 1986 | $1.75B | +0.9% | +$16.03M | ||
| 1985 | $1.73B | — | — |
- 2026$70.98B-7.1%
- 2025$76.40B+0.1%
- 2024$76.32B+27.9%
- 2023$59.66B-6.8%
- 2022$63.99B-5.8%
- 2021$67.96B+38.0%
- 2020$49.25B-1.7%
- 2019$50.11B+39.6%
- 2018$35.90B+2.8%
- 2017$34.93B+15.9%
- 2016$30.15B+15.2%
- 2015$26.17B-7.9%
- 2014$28.41B+7.4%
- 2013$26.46B+43.1%
- 2012$18.50B+15.9%
- 2011$15.95B+16.3%
- 2010$13.72B+22.9%
- 2009$11.16B-18.8%
- 2008$13.75B-10.8%
- 2007$15.40B+27.4%
- 2006$12.09B-1.5%
- 2005$12.28B+52.9%
- 2004$8.03B+5.6%
- 2003$7.61B+40.1%
- 2002$5.43B-43.7%
- 2001$9.65B+6.4%
- 2000$9.07B-13.7%
- 1999$10.51B+9.7%
- 1998$9.58B-4.3%
- 1997$10.00B+43.1%
- 1996$6.99B+28.9%
- 1995$5.42B+59.6%
- 1994$3.40B-0.8%
- 1993$3.43B-12.0%
- 1992$3.90B+50.8%
- 1991$2.58B+12.3%
- 1990$2.30B-17.0%
- 1989$2.77B+54.4%
- 1988$1.79B+18.8%
- 1987$1.51B-13.5%
- 1986$1.75B+0.9%
- 1985$1.73B—
Market Cap values are taken from Aon's reported income statements (share counts) and end-of-day prices (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
About Market Cap at Aon (AON)
According to Aon's latest reported financial statements, the company's latest reported market cap is $69.53B. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
As of the 2026 fiscal year, Aon (AON) reported market cap of $70.98B – declined 7.1% year-over-year.
Aon market cap compound annual growth for the 2021–2026 (5 years) window is +0.9%, with mixed annual results across the window.
Aon market cap declined from $76.40B in 2025 to $70.98B in 2026, a 7.1% drawdown.
Across the available history, market cap reached its high of $76.40B in 2025 and its low of $1.51B in 1987.
Aon Market Cap by Year
Aon Market Cap 2026: $70.98B
2026's market cap for Aon came in at $70.98B, declined 7.1% below 2025.
Aon Market Cap 2025: $76.40B
Aon posted market cap of $76.40B in 2025, edged up 0.1% from 2024. This figure represents the highest annual value in the available history.
Aon Market Cap 2024: $76.32B
In 2024, Aon reported market cap of $76.32B, grew 27.9% from 2023.
Aon Market Cap 2023: $59.66B
Aon market cap in 2023 was $59.66B, declined 6.8% below 2022.
Aon Market Cap 2022: $63.99B
Aon market cap in 2022 was $63.99B.
See more financial history for Aon (AON).
Sector peers by Market Cap
Financial Services peers of Aon (AON), ranked by their latest market cap
| $1.07T | |
| $855.84B | |
| $620.71B | |
| $433.52B | |
| $396.49B | |
| $343.96B | |
| $317.48B | |
| $254.52B |
- $855.84B
- $620.71B
- $433.52B
- $396.49B
- $343.96B
- $317.48B
- $254.52B
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