Arthur J. Gallagher & Co. (AJG)

NYSE: AJG · Real-Time Price · USD

228.20

+2.98 (1.32%)

At close: Feb 27, 2026, 4:00 PM EST

225.95

-2.25 (-0.98%)

After-hours: Feb 27, 2026, 7:11 PM EST

Arthur J. Gallagher & Co. Market Cap

Arthur J. Gallagher & Co. has a market cap or net worth of $58.67 billion as of February 27, 2026. Its market cap has decreased by -17.62% in one year.

Market Cap

58.67B

Enterprise Value

70.89B

1-Year Change

-17.62%

Ranking

#273

Market Cap Chart

Since December 1, 1998, Arthur J. Gallagher & Co.'s market cap has increased from $784.20M to $58.67B, an increase of 7,381.54%. That is a compound annual growth rate of 17.15%.

Market Cap History

Date	Market Cap	% Change
Feb 27, 2026	58.67B	-11.72%
Dec 31, 2025	66.46B	6.71%
Dec 31, 2024	62.28B	28.27%
Dec 29, 2023	48.55B	22.14%
Dec 30, 2022	39.75B	13.03%
Dec 31, 2021	35.17B	47.82%
Dec 31, 2020	23.79B	33.95%
Dec 31, 2019	17.76B	31.23%
Dec 31, 2018	13.54B	18.30%
Dec 29, 2017	11.44B	23.74%
Dec 30, 2016	9.25B	27.81%
Dec 31, 2015	7.23B	-4.79%
Dec 31, 2014	7.60B	23.07%
Dec 31, 2013	6.17B	43.23%
Dec 31, 2012	4.31B	14.18%
Dec 30, 2011	3.77B	22.45%
Dec 31, 2010	3.08B	34.53%
Dec 31, 2009	2.29B	-6.90%
Dec 31, 2008	2.46B	8.36%
Dec 31, 2007	2.27B	-21.65%
Dec 29, 2006	2.90B	-1.39%
Dec 30, 2005	2.94B	-2.10%
Dec 31, 2004	3.00B	2.62%
Dec 31, 2003	2.93B	13.22%
Dec 31, 2002	2.58B	-11.53%

View and export this data all the way back to 1998. Sign Up Today.

Market Capitalization

Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.

Formula: Market Cap = Stock Price * Shares Outstanding

Full Definition

Related Stocks

Company	Market Cap
Marsh & McLennan Companies	90.41B
Aon plc	71.88B
Willis Towers Watson	28.85B
Brown & Brown	24.45B
Erie Indemnity Company	14.09B
The Baldwin Insurance Group	3.31B
Neptune Insurance Holdings	2.88B
CorVel	2.64B

Market Cap Rankings