AON
Aon plc - Class A
PE ratio, current and historical analysis
- Stocks
- Financial Services
- NYSE: AON
- PE Ratio
The PE ratio for Aon plc - Class A stock stands at 19.81 as of Aug 6, 2026. This is calculated based on the TTM EPS of $18.21 and the stock price of $360.75 per share. A decrease of 7% has been observed in the PE ratio compared to its average of 21.2 of the last four quarters.
AON PE ratio history
Over the last ten years, the average PE ratio of Aon plc - Class A has been 29.46. The current 19.81 P/E ratio is 33% lower than the historical average. Looking back at the last ten years, AON's PE ratio peaked in the Sep 2021 quarter at 71.8, with a price of $285.77 and an EPS of $3.98. The Mar 2026 quarter marked the lowest point at 17.63, with a price of $322.78 and an EPS of $18.31.
Aon plc - Class A PE ratio by year
Maximum annual increase: 116.12% in 2021
Maximum annual decrease: -54.36% in 2022
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 20.62 | -27.95% | $352.88 | $17.11 |
| 2024 | 28.62 | 23.9% | $359.16 | $12.55 |
| 2023 | 23.1 | -5.87% | $291.02 | $12.6 |
| 2022 | 24.54 | -54.36% | $300.14 | $12.23 |
| 2021 | 53.77 | 116.12% | $300.56 | $5.59 |
| 2020 | 24.88 | -23.3% | $211.27 | $8.49 |
| 2019 | 32.44 | 3.12% | $208.29 | $6.42 |
| 2018 | 31.46 | 11.28% | $145.36 | $4.62 |
| 2017 | 28.27 | 32.04% | $134 | $4.74 |
| 2016 | 21.41 | 14.49% | $111.53 | $5.21 |
| 2015 | 18.7 | -6.73% | $92.21 | $4.93 |
| 2014 | 20.05 | -14.68% | $94.83 | $4.73 |
| 2013 | 23.5 | 27.65% | $83.89 | $3.57 |
| 2012 | 18.41 | 14.85% | $55.61 | $3.02 |
| 2011 | 16.03 | -16.03% | $46.8 | $2.92 |
Aon plc - Class A PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Jun 2026 | 18.21 | 3.29% | $331.69 | $18.21 |
| Mar 2026 | 17.63 | -14.5% | $322.78 | $18.31 |
| Dec 2025 | 20.62 | -27.32% | $352.88 | $17.11 |
| Sep 2025 | 28.37 | -4.35% | $356.58 | $12.57 |
| Jun 2025 | 29.66 | -12.14% | $356.76 | $12.03 |
| Mar 2025 | 33.76 | 17.96% | $399.09 | $11.82 |
| Dec 2024 | 28.62 | -1.31% | $359.16 | $12.55 |
| Sep 2024 | 29 | 24.46% | $345.99 | $11.93 |
| Jun 2024 | 23.3 | -10.14% | $293.58 | $12.6 |
| Mar 2024 | 25.93 | 12.25% | $333.72 | $12.87 |
| Dec 2023 | 23.1 | -5.6% | $291.02 | $12.6 |
| Sep 2023 | 24.47 | -8.35% | $324.22 | $13.25 |
| Jun 2023 | 26.7 | 6.21% | $345.2 | $12.93 |
| Mar 2023 | 25.14 | 2.44% | $315.29 | $12.54 |
| Dec 2022 | 24.54 | 18.09% | $300.14 | $12.23 |
AON Price vs fair value
AON average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
AON's current PE ratio is lower than its 3, 5 and 10-year averages.
PE comparison
With a price to earnings (P/E) of 19.81, AON ranks higher than the Financial Services sector average but lower than the industry average. In comparison with the Financial Services sector average of 13.65, Aon plc - Class A's price to earnings (P/E) is 45% higher.
AON PE vs peers
Frequently asked questions
What is Aon plc - Class A's PE ratio?
AON's price to earnings ratio is 19.81 as of Aug 6, 2026.
What is the 3-year average PE ratio for Aon plc - Class A (AON)?
Over the last 3 years, the average price to earnings ratio for AON stock is 25.22.
What is the 5-year average PE ratio for Aon plc - Class A (AON)?
Over the last 5 years, the average price to earnings ratio for AON stock is 30.79.
What is the highest PE ratio for AON?
Over the last ten years, the Sep 2021 quarter recorded the highest quarterly PE ratio at 71.8.
How does the current PE ratio for AON compare to its historical average?
The current PE ratio of AON is 33% lower than the 10-year historical average.
How is AON's PE ratio calculated (Aon plc - Class A PE ratio formula)?
The P/E ratio is calculated by taking the latest stock price and dividing it by the EPS for the last 12 months. As of today (Aug 6, 2026), Aon plc - Class A's share price is $360.75. The company's earnings per share for the trailing twelve months (TTM) ending Jun 2026 is $18.21. Therefore, Aon plc - Class A's PE ratio for today is 19.81. PE RATIO(19.81) = STOCK PRICE($360.75) / TTM EPS($18.21)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.