$276.77▲ +0.87 · +0.3%from $275.90 the session before · Sep 30, 2026 close · end of day
Open
$275.78
High
$278.19
Low
$273.80
Day's range
$4.41.6% of the previous close
VWAP
$276.42close +0.13% from it
Volume, shares
2.3M1.02× the 20-session average
Traded, $
$635.8M
Trades
45.4K51 shares per trade
Previous close
$275.90+0.87 to the close
Market cap
$58.71Bat the close of Sep 30
Day range68% of the way up
$273.80$278.19
52-week range7% of the way up
$269.02 Sep 29$382.34 Jul 28
−28% from the high · +2.9% from the low
Options
No listed options on AON
Close $ · S&P 500 rebased to the first close126 sessions to Sep 30 · axis fixed at 4 × ATR-14 around the last close · hover or tap a session and the read beside the chart follows it
Revenue $4.25B, +2.2% on a year earlier; profit $551.0M, −4.8% in the Jun 2026 quarter, consolidated.
Last 8 quarters, consolidatedUS dollars as filed · year on year against the same quarter a year earlier · market: close on the first session after the filing against the last close before it, S&P 500 over the same session
Quarterly results of AON on the consolidated basis with the market's move on the first session after each filing
Quarter
Revenue $
Revenue YoY
Profit $
Profit YoY
EPS $
Market on the day
Jun 2026filed Jul 29
$4.25B
▲ +2.2%
$551.0M
▼ −4.8%
2.58
▼ −2.8%S&P 500 +1.7% · −4.5 pp
Mar 2026filed May 1
$5.03B
▲ +6.5%
$1.21B
▲ +26%
5.63
▲ +1.1%S&P 500 −0.4% · +1.5 pp
Dec 2025filed Feb 13
$4.30B
▲ +3.7%
$1.69B
▲ +140%
7.82
—not reached
Sep 2025filed Oct 31
$4.00B
▲ +7.4%
$458.0M
▲ +34%
2.11
—not reached
Jun 2025filed Jul 29
$4.16B
▲ +11%
$579.0M
▲ +11%
2.66
▼ −2.8%S&P 500 +1.7% · −4.5 pp
Mar 2025filed May 1
$4.73B
▲ +16%
$965.0M
▼ −9.9%
4.43
▲ +1.1%S&P 500 −0.4% · +1.5 pp
Dec 2024filed Feb 18
$4.15B
▲ +23%
$716.0M
▲ +44%
3.11
—not reached
Sep 2024filed Oct 31
$3.72B
▲ +26%
$343.0M
▼ −25%
1.57
—not reached
By fiscal yearfiscal years as filed in the 10-K · named by the year the fiscal year ends
Financial-year results of AON on the consolidated basis, summed from the quarters filed
Year
Revenue $
Revenue YoY
Profit $
Profit YoY
EPS $
FY25to Dec 2025
$17.18B
▲ +9.4%
$3.69B
▲ +39%
17.02
FY24to Dec 2024
$15.70B
▲ +17%
$2.65B
▲ +3.5%
12.49
FY23to Dec 2023
$13.38B
▲ +7.2%
$2.56B
▼ −0.97%
12.51
FY22to Dec 2022
$12.48B
▲ +2.4%
$2.59B
▲ +110%
12.14
FY21to Dec 2021
$12.19B
▲ +10%
$1.25B
▼ −36%
5.55
Fundamentals
consolidated · filings to Jun 2026 · close $276.77 on Sep 30
AON trades at 15 times trailing earnings, 6.1 times book value, revenue +4.9% over twelve months, a 0.59% dividend yield, market cap $58.71B.
Valuation
Market cap
$58.71Bon Sep 30
Price to earnings
15consolidated · four quarters to Jun 2026
Trailing EPS
$18.14diluted · consolidated · four quarters to Jun 2026
Price to book
6.1consolidated · balance sheet to Jun 2026
Book value a share
$45.25consolidated · balance sheet to Jun 2026
Debt to equity
—
Return on equity
45%trailing profit over average equity · consolidated
Dividend yield
0.59%$1.64 a share in 365 days
Price to sales
3.3market cap over revenue, four quarters to Jun 2026
Shares outstanding
212Mon Sep 30
Growthsums of the four quarters filed to Jun 2026 · growth against the four quarters before them · consolidated
Revenue, trailing 12 months
$17.58Bfour quarters to Jun 2026
Revenue growth, 12 months
▲ +4.9%against the twelve months before
Revenue 3-year CAGR
▲ +11%trailing twelve months against the twelve months 3 years earlier · consolidated
Profit, trailing 12 months
$3.91Bfour quarters to Jun 2026
Profit growth, 12 months
▲ +50%against the twelve months before
Profit 3-year CAGR
▲ +14%trailing twelve months against the twelve months 3 years earlier · consolidated
Shareholding
SEC Forms 3, 4 and 5
No open-market insider buying or selling in the last 90 days.
Insider tradesSEC Forms 3, 4 and 5 · the latest 10
AON insider trades
Insider
Trade
Shares
Price
Held after
Karaboutis AdrianaDirector
withheld for tax · Jun 25, 2026
186
$315.95
2,606
Karaboutis AdrianaDirector
granted · Jun 25, 2026
776
—
2,792
Jenkins Jo AnnDirector
withheld for tax · Jun 25, 2026
186
$315.95
874
Jenkins Jo AnnDirector
granted · Jun 25, 2026
776
—
1,060
SMITH SARAH GDirector
granted · Jun 25, 2026
776
—
2,300
SMITH SARAH GDirector
withheld for tax · Jun 25, 2026
186
$315.95
2,114
Cai Jin-YongDirector
withheld for tax · Jun 25, 2026
397
$315.95
7,845
Cai Jin-YongDirector
granted · Jun 25, 2026
776
—
8,241
Spruell ByronDirector
withheld for tax · Jun 25, 2026
186
$315.95
6,377
Spruell ByronDirector
granted · Jun 25, 2026
776
—
6,563
Corporate actions
exchange records
Nothing upcoming on record; the last was a dividend of $0.82 a share, ex-date Aug 3, 2026.
Actionsex-dates · upcoming first, then the last eight · dividends in dollars a share, splits as ratios
Corporate actions of AON, upcoming first, then the most recent
Ex-date
Action
Amount or ratio
Record date
recent
Aug 3, 2026
dividend
$0.82
—
May 1, 2026
dividend
$0.82
—
Calendardividends by ex-date
Dividends in 365 days
$1.64a share · ex-dates inside the year
Last dividend
$0.82ex-date Aug 3, 2026
Price history
131 sessions on record · to Sep 30 · end of day
AON is −15.2% over 20 sessions against the S&P 500's +0.1%, 28% below its 52-week high, realised volatility 26% annualised.
Returns against S&P 500longest window first · S&P 500 over the same sessions
Returns of the stock and S&P 500 over six windows, longest first
Window
From $
AON %
S&P 500 %
Difference pp
120 sessionssince Apr 9
$325.38
▼ −15%
▲ +12%
−27
60 sessionssince Jul 7
$359.82
▼ −23%
▲ +2.0%
−25
20 sessionssince Sep 1
$326.30
▼ −15%
▲ +0.11%
−15
5 sessionssince Sep 23
$281.61
▼ −1.7%
▼ −0.67%
−1.0
1 sessionsince Sep 29
$275.89
▲ +0.32%
▼ −0.21%
+0.53
Averages of the closeclose against each average
5-session average
$275.77close +0.36% from it
20-session average
$297.89close −7.1% from it
50-session average
$332.38close −17% from it
Range and volumetrue range over 14 sessions · high to low over 20 · volume against the 20-session average
Average true range, 14
$7.22.6% of the close
Average day's range, 20
$6.72.4% of the close
Volume against 20 sessions
1.02×2.3M vs 2.26M average
Volatility and co-movement with S&P 500annualised from daily returns
Realised volatility, 20
26%≈ ±1.6% a session · moved more than that on 9 of 20
Realised volatility, 60
32%≈ ±2.0% a session · moved more than that on 12 of 60
Beta to S&P 500, 60
-0.30moved with S&P 500 on 30 of 60 sessions
Up and down sessionscloses above and below the previous close
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