TotalMarketCap

Aon

AONNYSE United StatesFinanceSpecialty Insurers

Market cap

$73.160 B

$344.84 +0.05%

Close of 6 Nov 2026

As of 6 Nov 2026, Aon (AON) has a market capitalization of $73.2B. Market cap measures the value of outstanding equity at market prices; company totals combine applicable share classes. Prices and market caps come from Nasdaq, with financial fundamentals from SEC filings. See sources and calculation details.

Revenue

$17.2B

#259 by revenue

Earnings

$3.69B

#134 by earnings

Shares outstanding

212,157,176

Latest filing cover page

P/E ratio

19.8

Cap ÷ net income

Specialty Insurers, ranked by market cap

All 34 →
  1. #1Marsh & Mclennan CompaniesMRSH$99.7B
  2. #2Arthur J. Gallagher & Co.AJG$74.1B
  3. #3AonAON$73.2B
  4. #4Willis Towers WatsonWTW$31.1B
  5. #5Brown & BrownBRO$24.7B

What if Aon were worth as much as…

Open the what-if tool →

Gold $28.2T

$133,094.13

Per share 386× higher

Bitcoin $1.53T

$7,201.49

Per share 20.9× higher

Apple $5.02T

$23,641.82

Per share 68.6× higher

Or at a round number

$100.0B$200.0B$500.0B$1.00T

Where these numbers come from

Share counts and financials for Aon are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Read the methodology.