What If You Invested $1,000 in Aon (AON)?
Enter any amount and start date. We use historical prices to show your hypothetical return.
AON
Historical extremes
What if you bought at the best or worst time? Check max profit, max drawdown, and total return since IPO.
Max profit
+39,689%
(397.8 times)
- Buy
- Feb 20, 1981
- $1.02
- Sell
- Mar 3, 2025
- $405.85
Buying AON at the best price and selling at the peak would have turned $1,000 into $397,892.16.
Max drawdown
67.39%
(fell to 33% of peak)
- Peak
- Jul 6, 1998
- $32.72
- Trough
- Aug 8, 2002
- $10.67
A $1,000 investment in AON at the peak would have shrunk to $326.1 at the trough.
Return since IPO
+28,953%
(290.5 times)
- IPO
- Jun 2, 1980
- $1.11
- Current
- Apr 29, 2026
- $322.49
A $1,000 investment in AON at IPO would be worth $290,531.53 today.
Frequently asked questions
What is Aon (AON) stock's all-time high (ATH) and all-time low (ATL)?
- Aon (AON) stock's all-time low (ATL) was $1.02 on Feb 20, 1981. The all-time high (ATH) was $405.85 on Mar 3, 2025.
What if you invested $1,000 in Aon (AON) stock for maximum profit?
- Buying Aon (AON) stock at the best price ($1.02 on Feb 20, 1981) and selling at the peak ($405.85 on Mar 3, 2025) would have turned $1,000 into $397,892.16. Historical return: +39,689.22% (397.8 times).
What are Aon (AON)'s best buy and sell dates for maximum profit?
- The best buy date for Aon (AON) stock was Feb 20, 1981 at $1.02. The best sell date was Mar 3, 2025 at $405.85. This investment would have returned +39,689.22% (397.8 times).
What was Aon (AON) stock's maximum drawdown?
- Aon (AON) stock's worst decline was 67.39% (fell to 33% of peak) from peak to trough. Peak: $32.72 on Jul 6, 1998. Trough: $10.67 on Aug 8, 2002. A $1,000 investment at the peak would have been worth $326.1 at the trough.
What if you bought Aon (AON) stock at IPO?
- A $1,000 investment in Aon (AON) stock at IPO ($1.11 on Jun 2, 1980) would be worth $290,531.53 today. Historical return: +28,953.15% (290.5 times). Current stock price: $322.49 as of Apr 29, 2026.
What if you invested $1,000 in Aon (AON) 5 years ago?
- A $1,000 investment in Aon (AON) stock 5 years ago ($230.03 on Apr 29, 2021) would be worth $1,401.95 today. Historical return: +40.19% (1.40 times). Current stock price: $322.49 as of Apr 29, 2026.
What if you invested $1,000 in Aon (AON) 10 years ago?
- A $1,000 investment in Aon (AON) stock 10 years ago ($96.25 on Apr 29, 2016) would be worth $3,350.55 today. Historical return: +235.05% (3.35 times). Current stock price: $322.49 as of Apr 29, 2026.
What if you invested $1,000 in Aon (AON) 20 years ago?
- A $1,000 investment in Aon (AON) stock 20 years ago ($33.61 on Apr 28, 2006) would be worth $9,595.06 today. Historical return: +859.51% (9.59 times). Current stock price: $322.49 as of Apr 29, 2026.
Data & methodology
How does the investment calculator work?
- Enter an investment amount and a start date. We use historical stock prices to calculate how many shares you would have bought, then apply the current price to show your hypothetical portfolio value and return.
What are Historical extremes?
- Max profit: the best buy and sell dates that maximize percentage return. Max drawdown: the largest peak-to-trough decline in price. Return since IPO: total return from IPO date to the latest price.
What is Max drawdown?
- Maximum drawdown is the largest peak-to-trough decline in price. It shows the worst drop from any prior high to a subsequent low. Peak and Trough are the dates and prices at which this decline occurred.
Does this include dividends?
- The calculator uses adjusted closing prices when available, which account for stock splits and dividends. For the most accurate results, we recommend using data that includes dividend adjustments.
Where does the price data come from?
- Historical prices are dividend-adjusted closing prices from our data provider. The calculator and Historical extremes use the same data source for consistent results.
How are the dollar amounts in the cards calculated?
- The dollar amounts in Historical extremes use the investment amount you select in the calculator above (e.g. $1,000). They show what your investment would have been worth at the Buy/Peak/IPO date versus the Sell/Trough/Current date.
What date range can I use?
- The available date range depends on our historical price data for AON. You can select any date between our first and most recent data point.
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