Shares Outstanding for Aon (AON)
According to Aon's latest reported financial statements, the company's latest reported diluted shares outstanding is 216.50M. Diluted weighted-average shares outstanding is the share count used to compute per-share metrics like EPS. Buybacks lower it; new issuance, stock-based compensation, and convertible securities raise it. Multiply by the stock price for market capitalization.
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
AON
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Latest period
216.50M
YoY change
+1.9%
5Y CAGR
-1.5%
Peak year (2006)
342.10M
Latest annual
216.50M
Shares Outstanding history chart for Aon (AON) from 1985 to 2025
Shares Outstanding history table for Aon (AON) from 1985 to 2025
| Fiscal year | Period ended | Reported | Shares Outstanding | YoY |
|---|---|---|---|---|
| 2025 | 216.50M | +1.9% | ||
| 2024 | 212.50M | +3.7% | ||
| 2023 | 205.00M | -3.8% | ||
| 2022 | 213.20M | -5.7% | ||
| 2021 | 226.10M | -3.0% | ||
| 2020 | 233.10M | -3.1% | ||
| 2019 | 240.60M | -2.6% | ||
| 2018 | 247.00M | -5.3% | ||
| 2017 | 260.70M | -3.6% | ||
| 2016 | 270.30M | -4.8% | ||
| 2015 | 283.80M | -5.3% | ||
| 2014 | 299.60M | -5.0% | ||
| 2013 | 315.40M | -5.2% | ||
| 2012 | 332.60M | -2.4% | ||
| 2011 | 340.90M | +14.4% | ||
| 2010 | 298.10M | +2.4% | ||
| 2009 | 291.10M | -3.3% | ||
| 2008 | 300.90M | -6.8% | ||
| 2007 | 323.00M | -5.6% | ||
| 2006 | 342.10M | +0.2% | ||
| 2005 | 341.50M | +1.5% | ||
| 2004 | 336.60M | +5.9% | ||
| 2003 | 317.80M | +10.5% | ||
| 2002 | 287.58M | +5.8% | ||
| 2001 | 271.70M | +2.6% | ||
| 2000 | 264.80M | +0.8% | ||
| 1999 | 262.70M | +1.3% | ||
| 1998 | 259.40M | +1.3% | ||
| 1997 | 256.00M | +1.1% | ||
| 1996 | 253.22M | +3.5% | ||
| 1995 | 244.57M | +2.4% | ||
| 1994 | 238.90M | -0.1% | ||
| 1993 | 239.09M | -1.8% | ||
| 1992 | 243.46M | +10.7% | ||
| 1991 | 220.00M | -1.5% | ||
| 1990 | 223.36M | +0.9% | ||
| 1989 | 221.33M | +2.3% | ||
| 1988 | 216.27M | -3.0% | ||
| 1987 | 222.89M | -0.4% | ||
| 1986 | 223.78M | -0.9% | ||
| 1985 | 225.77M | — |
Shares Outstanding values are taken from Aon's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
2025's annual diluted shares outstanding for Aon (AON) came in at 216.50M – edged up 1.9% year-over-year.
Across 2020–2025 (5 years), Aon diluted shares outstanding produced a CAGR of -1.5% – sustaining 2 straight years of year-over-year growth.
Between 2006 and 2025, Aon diluted shares outstanding plunged 36.7%, falling from 342.10M to 216.50M.
342.10M stands as the all-time-high annual diluted shares outstanding, posted in 2006, against a low of 205.00M during 2023.
Within Financial Services, Aon (AON) ranks 9th among 8 peers we track. The peer median for diluted shares outstanding is 2.06B.
Aon Shares Outstanding by Year
Aon Shares Outstanding 2025: 216.50M
Aon diluted shares outstanding in 2025 was 216.50M, edged up 1.9% from 2024.
Aon Shares Outstanding 2024: 212.50M
Aon diluted shares outstanding in 2024 was 212.50M, edged up 3.7% from 2023.
Aon Shares Outstanding 2023: 205.00M
Aon diluted shares outstanding in 2023 was 205.00M, edged down 3.8% below 2022. This figure represents the lowest annual value in the available history.
Aon Shares Outstanding 2022: 213.20M
Aon diluted shares outstanding in 2022 was 213.20M, declined 5.7% below 2021.
Aon Shares Outstanding 2021: 226.10M
Aon diluted shares outstanding in 2021 was 226.10M.
See more financial history for Aon (AON).
Sector peers — Shares Outstanding
Companies in the same sector as Aon, ranked by their latest diluted shares outstanding.
| Company | Shares Outstanding | Sector |
|---|---|---|
| Bank of America Corporation (BAC) | 7.55B | Financial Services |
| Wells Fargo & Company (WFC) | 3.22B | Financial Services |
| JPMorgan Chase & Co. (JPM) | 2.79B | Financial Services |
| Berkshire Hathaway Inc. (BRK-B) | 2.16B | Financial Services |
| Visa Inc. (V) | 1.97B | Financial Services |
| Morgan Stanley (MS) | 1.59B | Financial Services |
| Mastercard Incorporated (MA) | 898.00M | Financial Services |
| The Goldman Sachs Group, Inc. (GS) | 317.60M | Financial Services |
Frequently asked questions
What is Aon's diluted shares outstanding?
- Latest reported diluted shares outstanding for Aon (AON) is 216.50M (period ending December 31, 2025).
How has Aon diluted shares outstanding changed year-over-year?
- Aon (AON) diluted shares outstanding changed +1.9% year-over-year on the latest annual filing.
What is the long-term growth rate of Aon diluted shares outstanding?
- Aon (AON) diluted shares outstanding compound annual growth rate is -1.5% over the most recent 5 years available.
When did Aon diluted shares outstanding hit its highest annual value?
- Aon diluted shares outstanding reached its highest annual value of 342.10M in 2006.
What was Aon diluted shares outstanding in 2024?
- Aon (AON) diluted shares outstanding in 2024 was 212.50M.
What was Aon diluted shares outstanding in 2025?
- Aon (AON) diluted shares outstanding in 2025 was 216.50M.
Metrics overview
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