Question 1

What is Aon's P/E ratio?

Accepted Answer

Aon (AON) P/E ratio is 18.0× as of June 5, 2026. The ratio is calculated by dividing market capitalisation by trailing twelve-month earnings (net income), using USD-normalised financials (IAS 21 exchange-rate translation for non-USD reporters).

Question 2

How is the P/E ratio calculated?

Accepted Answer

P/E = Share Price ÷ Trailing Twelve-Month (TTM) Diluted EPS, or equivalently Market Capitalisation ÷ TTM Net Income. All inputs are sourced from audited GAAP/IFRS filings and translated to USD using period-end exchange rates so the multiple is comparable across companies and currencies.

Question 3

What is the P/E ratio?

Accepted Answer

The price-to-earnings (P/E) ratio, also called the earnings multiple, measures how much investors pay per dollar of a company's trailing twelve-month (TTM) earnings. It is calculated as share price ÷ TTM diluted EPS (equivalent to market capitalisation ÷ TTM net income). A higher P/E implies the market is pricing in stronger future earnings growth or lower risk; a lower P/E can signal slower expected growth, higher risk, or potential undervaluation.

Question 4

What is a good P/E ratio for Aon?

Accepted Answer

There is no universal "good" P/E. As a rule of thumb, the S&P 500 has historically averaged a P/E in the mid-to-high teens; mature, slow-growth businesses commonly trade in the 10–18× range, while high-growth or asset-light companies often trade at 25–50×+. What matters is the comparison to sector peers and to the company's own historical range. For Aon specifically, the relevant sector benchmark is the current sector median of 12.8×.

Question 5

Is Aon's P/E ratio high or low?

Accepted Answer

Aon's P/E ratio of 18.0× is below its own 5-year average of 31.1× and above the sector median of 12.8×. That places the current reading at the 2th percentile of its 10-year history. A higher multiple usually reflects stronger expected growth, lower perceived risk, or higher returns on capital; a lower multiple reflects the opposite.

Question 6

What is Aon's historical P/E ratio range?

Accepted Answer

In the available daily series, Aon (AON) P/E ratio has ranged from a low of 7.3× in 2008 to a high of 78.7× in 2021. The 5-year average is 31.1× and the 5-year median is 26.2×.

Question 7

What was Aon's P/E ratio in 2025?

Accepted Answer

Aon (AON) P/E ratio at the end of 2025 was 20.5×. Annual values reflect the multiple on the last trading day of each calendar year, using the trailing twelve-month earnings figure available at that date.

Question 8

Why does Aon's P/E ratio change over time?

Accepted Answer

Valuation multiples move with two inputs: the numerator (market capitalisation, which tracks the share price) and the denominator (earnings). Share-price changes — driven by interest rates, earnings expectations, risk appetite, and broader market sentiment — typically dominate short-term moves, while changes in the underlying fundamental drive the longer-term trend. As a result, the ratio can rise during stock-price rallies even if the business itself has not become more valuable, and fall during sell-offs even when fundamentals are improving.


2025	$75.90B	$3.69B	20.5×	-8.8×	Dec 31, 2025
2024	$77.79B	$2.65B	29.3×	+6.6×	Dec 31, 2024
2023	$58.29B	$2.56B	22.7×	-1.3×	Dec 31, 2023
2022	$62.28B	$2.59B	24.1×	-28.5×	Dec 31, 2022
2021	$65.91B	$1.25B	52.5×	+27.9×	Dec 31, 2021
2020	$48.42B	$1.97B	24.6×	-7.3×	Dec 31, 2020
2019	$48.89B	$1.53B	31.9×	+0.8×	Dec 31, 2019
2018	$35.24B	$1.13B	31.1×	+3.6×	Dec 31, 2018
2017	$33.67B	$1.23B	27.5×	+7.0×	Dec 31, 2017
2016	$29.62B	$1.45B	20.5×	+2.1×	Dec 31, 2016
2015	$25.40B	$1.39B	18.3×	-1.1×	Dec 31, 2015
2014	$27.20B	$1.40B	19.5×	-3.6×	Dec 31, 2014
2013	$25.67B	$1.11B	23.1×	+5.1×	Dec 31, 2013
2012	$17.85B	$993.00M	18.0×	+2.2×	Dec 31, 2012
2011	$15.47B	$979.00M	15.8×	-6.5×	Dec 31, 2011
2010	$15.72B	$706.00M	22.3×	+8.1×	Dec 31, 2010
2009	$10.58B	$747.00M	14.2×	+5.3×	Dec 31, 2009
2008	$12.99B	$1.46B	8.9×	-7.9×	Dec 31, 2008
2007	$14.50B	$864.00M	16.8×	+2.1×	Dec 31, 2007
2006	$10.60B	$720.00M	14.7×	-1.1×	Dec 31, 2006
2005	$11.67B	$737.00M	15.8×	+1.8×	Dec 31, 2005
2004	$7.66B	$546.00M	14.0×	+1.9×	Dec 31, 2004
2003	$7.63B	$628.00M	12.2×	-2.3×	Dec 31, 2003
2002	$5.94B	$410.00M	14.5×	-32.9×	Dec 31, 2002
2001	$9.63B	$203.00M	47.4×	—	Dec 31, 2001


Globe Life (GL-PD)	9.7×
UMB Financial (UMBF)	9.7×
T. Rowe Price (TROW)	9.6×
Everest Re Group (RE)	9.6×
Old Republic International (ORI)	9.5×
First Financial (THFF)	9.3×
Globe Life (GL)	9.3×
The Hartford (HIG)	9.3×
Assured Guaranty (AGO)	8.9×
Cincinnati Financial (CINF)	8.8×
Federal Agricultural Mortgage (AGM)	8.8×
Ally Financial (ALLY)	8.7×
Travelers Companies (TRV)	8.3×
PayPal (PYPL)	8.2×
Farmers & Merchants Bancorp (FMCB)	8.0×
Chesapeake Financial Shares (CPKF)	7.6×
PSB Holdings (PSBQ)	7.5×
Arch Capital Group (ACGL)	7.1×
AXIS Capital Holdings (AXS)	7.0×
Tompkins Financial (TMP)	6.7×
Everest Re Group (EG)	6.5×
Synchrony Financial (SYF)	6.5×
Mercury General (MCY)	5.8×
RenaissanceRe Holdings (RNR)	4.5×
Allstate (ALL)	4.4×

P/E Ratio for Aon (AON)

P/E Ratio daily chart for Aon (AON)

Historical P/E Ratio for Aon (AON) from 2001 to 2025

About P/E Ratio at Aon (AON)

Aon P/E Ratio by Year

Aon P/E Ratio 2025: 20.5×

Aon P/E Ratio 2024: 29.3×

Aon P/E Ratio 2023: 22.7×

Aon P/E Ratio 2022: 24.1×

Aon P/E Ratio 2021: 52.5×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

Aon (AON) Key Financials

P/E Ratio daily chart for Aon (AON)

Historical P/E Ratio for Aon (AON) from 2001 to 2025

About P/E Ratio at Aon (AON)

Aon P/E Ratio by Year

Aon P/E Ratio 2025: 20.5×

Aon P/E Ratio 2024: 29.3×

Aon P/E Ratio 2023: 22.7×

Aon P/E Ratio 2022: 24.1×

Aon P/E Ratio 2021: 52.5×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

+What is Aon's P/E ratio?

+How is the P/E ratio calculated?

+What is the P/E ratio?

+What is a good P/E ratio for Aon?

+Is Aon's P/E ratio high or low?

+What is Aon's historical P/E ratio range?

+What was Aon's P/E ratio in 2025?

+Why does Aon's P/E ratio change over time?

Aon (AON) Key Financials