TotalMarketCap

Arthur J. Gallagher & Co.

AJGNYSE United StatesFinanceSpecialty Insurers

Market cap

$58.242 B

$227.24 +0.50%

Close of 6 Oct 2026

As of 6 Oct 2026, Arthur J. Gallagher & Co. (AJG) has a market capitalization of $58.2B. 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

$13.9B

#323 by revenue

Earnings

$1.49B

#287 by earnings

Shares outstanding

256,300,000

Latest filing cover page

P/E ratio

39.0

Cap ÷ net income

Specialty Insurers, ranked by market cap

All 34 →
  1. #1Marsh & Mclennan CompaniesMRSH$81.3B
  2. #2Arthur J. Gallagher & Co.AJG$58.2B
  3. #3AonAON$57.7B
  4. #4Willis Towers WatsonWTW$26.8B
  5. #5Brown & BrownBRO$20.4B

What if Arthur J. Gallagher & Co. were worth as much as…

Open the what-if tool →

Gold $28.8T

$112,488.92

Per share 495× higher

Bitcoin $1.68T

$6,566.93

Per share 28.9× higher

Nvidia $5.76T

$22,463.87

Per share 98.9× higher

Or at a round number

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

Where these numbers come from

Share counts and financials for Arthur J. Gallagher & Co. are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Last updated 7 Oct 2026. Read the methodology.