What is AON's market cap?

$73.12B, based on the Nov 4 close of $344.67.

What is AON's P/E ratio?

18.6× trailing-twelve-month earnings of $3.93B.

Does Aon plc pay a dividend?

Yes. The latest regular dividend was $0.82 per share (ex-date Nov 2), an annualised yield of 0.95%.

How much of AON is sold short?

3.4M shares, 1.7% of float, as of Oct 15, 2026.

What sector is AON in?

Financials, in the Insurance industry.

NYSE · AONFinancialsInsurance

Aon plc Class A (AON)

$344.67+4.39%

Close Nov 4, 2026 · split-adjusted

Nov 3, 2026$330.16▼ 2.85% in range

Nov 3, 2025Low $269.45 · High $381.26Nov 3, 2026

What changed · written from our data

As of Nov 4, 2026

Aon plc closed at $344.67 on Nov 4, up 4.39%, 9.6% below its 52-week closing high. Volume of 1.7M shares was 0.94× its 20-day average (close to normal).

Split-adjusted performance: +25.8% over one month, +11.8% over six months, +1.4% over one year.

In the quarter ended Sep 30, 2026, revenue was $4.10B, up 2.6% from a year earlier, with a net margin of 11.6%.

Short interest was 3.4M shares at the Oct 15 settlement, down 19.6% from the prior report (1.7% of float, 2.0 days to cover).

Market cap$73.12B212.2M shares

Revenue · quarter$4.10B+2.6% YoY

Diluted EPS$2.23+5.7% YoY

P/E · TTM18.6×P/S 4.1×

Net margin11.6%Gross 100.0%

Dividend yield0.95%$0.82 last paid

52-week range269.45 – 381.26−9.6% from high

Volume1.7M0.94× 20-day avg

Volatility · 60d35.7%Annualised

Short % of float1.7%2.0 days to cover

Net cash-$12.72BCash $15.32B

Next earnings—Not scheduled

Split-adjusted performance

1W +9.2%1M +25.8%3M −4.5%6M +11.8%YTD −2.3%1Y +1.4%3Y +11.6%5Y +8.8%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Insurance

Percentile among 129 companies (100 = best)

6-month momentum41

Revenue growth33

Net margin54

Value (low P/E)26

Size92

Industry medians: 6-month return +15.9%, revenue growth +6.7%, net margin 10.3%, P/E 12.6×.

Short interest

Details →

Shares short3.4M−19.6% vs prior

Days to cover2.0Settled Oct 15

% of float1.7%

Short vol. 10d60.0%of daily volume

Closest peers by size in Insurance

Company	Price	Today	6M	Rev. growth	Net margin	P/E	Mkt cap
AONAon	$344.67	+4.39%	+11.8%	+2.6%	11.6%	18.6	$73.12B
AJGArthur J. Gallagher &	$288.38	+5.46%	+46.5%	+24.2%	8.1%	47.1	$73.94B	Compare
ALLThe Allstate	$269.06	+2.89%	+23.5%	+11.8%	17.4%	5.2	$68.03B	Compare
CIThe Cigna Group	$305.41	+3.37%	+8.3%	+6.7%	2.3%	12.6	$80.70B	Compare
METMetLife	$102.89	+2.21%	+28.4%	+10.5%	3.7%	19.0	$65.38B	Compare
TRVThe Travelers Companies	$409.25	+3.50%	+35.7%	−0.5%	15.3%	10.1	$83.86B	Compare
AFLAflac	$125.30	+1.02%	+10.5%	−1.0%	20.0%	12.9	$62.82B	Compare
ELVElevance Health	$434.18	+4.94%	+15.9%	+1.4%	2.7%	18.3	$94.16B	Compare
MRSHMarsh	$210.38	+3.31%	+28.4%	—	11.8%	—	$100.04B	Compare

News about Aon

All news →

Aon Q3 Earnings Beat Estimates on Strong Organic Growth, Margin ExpansionZacks Investment Research · Oct 28, 2026▲ Positive Aon (AON) Q3 Earnings and Revenues Beat EstimatesZacks Investment Research · Oct 28, 2026▼ Negative Is the Options Market Predicting a Spike in Aon Stock?Zacks Investment Research · Oct 27, 2026▼ Negative Can AON Beat on Q3 Earnings Despite Weakness in Wealth Solutions?Zacks Investment Research · Oct 23, 2026▼ Negative Aon (AON) Earnings Expected to Grow: Should You Buy?Zacks Investment Research · Oct 21, 2026▼ Negative

Quick answers

What does Aon plc do?: Aon is a leading global provider of insurance and reinsurance brokerage and human resources solutions. Its operations are tilted toward its brokerage operations.
What is AON's market cap?: $73.12B, based on the Nov 4 close of $344.67.
What is AON's P/E ratio?: 18.6× trailing-twelve-month earnings of $3.93B.
Does Aon plc pay a dividend?: Yes. The latest regular dividend was $0.82 per share (ex-date Nov 2), an annualised yield of 0.95%.
How much of AON is sold short?: 3.4M shares, 1.7% of float, as of Oct 15, 2026.
What sector is AON in?: Financials, in the Insurance industry.

About Aon

Aon is a leading global provider of insurance and reinsurance brokerage and human resources solutions. Its operations are tilted toward its brokerage operations. Headquartered in London, Aon has about 60,000 employees and operations in over 120 countries.

HQ: Dublin 2, L260,000 employeesListed Feb 18, 1975aon.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology