Market Cap

Arthur J. Gallagher & Co. Market Capitalization:

$65.74 Billion

USD as of Jan. 1, 2026

business Arthur J. Gallagher & Co. Company Profile

Arthur J. Gallagher & Co. Main Stock Listing

NYSE: AJG

Market Capitalization History of Arthur J. Gallagher & Co.

Market capitalizations are calculated from the opening stock price at the beginning of each month.

Top Competitors by Market Capitalization

Industry: Insurance Brokers
Company Market Cap (USD)
Marsh & McLennan Companies, Inc. $89.71 B
Aon Plc $74.23 B
Willis Towers Watson plc $31.83 B
Brown & Brown, Inc. $26.50 B
Erie Indemnity Company $14.53 B
Sector: Financials
Company Market Cap (USD)
Berkshire Hathaway $1.072 T
JPMorgan $894.99 B
Visa $668.67 B
Mastercard $509.08 B
Bank of America $414.42 B

Yearly evolution of Arthur J. Gallagher & Co. market cap

Date Market Cap YoY Change
Jan. 1, 2026 $65.74 B -8.62%
Jan. 1, 2025 $71.94 B 47.50%
Jan. 1, 2024 $48.77 B 23.54%
Jan. 1, 2023 $39.48 B 20.10%
Jan. 1, 2022 $32.87 B 36.85%
Jan. 1, 2021 $24.02 B 12.52%
Jan. 1, 2020 $21.35 B 37.29%
Jan. 1, 2019 $15.55 B 9.35%
Jan. 1, 2018 $14.22 B 26.92%
Jan. 1, 2017 $11.20 B 43.01%
Jan. 1, 2016 $7.83 B -15.28%
Jan. 1, 2015 $9.25 B -3.89%
Jan. 1, 2014 $9.62 B 25.12%
Jan. 1, 2013 $7.69 B 10.83%
Jan. 1, 2012 $6.94 B 12.33%
Jan. 1, 2011 $6.18 B 31.62%
Jan. 1, 2010 $4.69 B -4.33%
Jan. 1, 2009 $4.91 B -7.17%
Jan. 1, 2008 $5.28 B -11.44%
Jan. 1, 2007 $5.97 B -1.68%
Jan. 1, 2006 $6.07 B -1.65%
Jan. 1, 2005 $6.17 B -5.21%
Jan. 1, 2004 $6.51 B 23.88%
Jan. 1, 2003 $5.26 B -23.48%
Jan. 1, 2002 $6.87 B 27.56%
Jan. 1, 2001 $5.38 B

Market capitalization is calculated from the opening stock price at the beginning of each year.

Company Description

Arthur J. Gallagher & Co., often abbreviated AJG, is a global insurance brokerage and risk management services company. Founded in 1927 and headquartered in Rolling Meadows, Illinois, AJG has become one of the largest insurance brokers in the world, operating in the Americas, Europe, Asia, and Oceania through local insurance brokering subsidiaries.

business Arthur J. Gallagher & Co. Company Profile

Arthur J. Gallagher & Co. Categories

United States languages Financials languages Insurance Brokers
United States Financials United States Insurance Brokers

Stocks & Indices

Arthur J. Gallagher & Co. has the following listings and related stock indices.


Stock: NYSE: AJG

Stock: BMV: AJG

Stock: Bovespa: A1JG34

Stock: FSX: GAH

What is a company's market capitalization?

The market capitalization of a company, more simply referred to as "market cap", is the total market value of a publicly traded company's outstanding shares. It is often considered as a key indicator of what a company is worth.