| AJG Market Cap History Table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Below is a table of the AJG market cap history going back to 1/31/2010:
Also see: AJG Shares Outstanding History and AJG YTD Return |
AJG Market Cap History — Arthur J. Gallagher Capitalization Over Time
As of 3/31/2026 Arthur J. Gallagher has a market cap of 55.64 billion. Investors often follow the AJG market cap history to compare the size of the company over time.
This page shows AJG market capitalization trends over time, with 66 market cap datapoints presented, dating back to 1/31/2010.
| AJG Market Cap History Chart | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
AJG Historical Market Cap: +21.74% CAGR 
Mouse over chart for data details
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| AJG Stock Price Chart |
| About Gallagher (Arthur J.) & Co. |
| Arthur J. Gallagher & Co. and its subsidiaries provide insurance brokerage, consulting and third-party claims settlement and administration services to both domestic and international entities. Co.'s segments include brokerage, risk management and corporate. Its brokerage segment operations provide brokerage and consulting services to entities of all types, including commercial, nonprofit, public sector entities, individuals, in the areas of insurance and reinsurance placements, risk of loss management and management of employer sponsored benefit programs. We show 66 historical shares outstanding datapoints in our AJG shares outstanding history coverage, used to compute AJG market cap on those dates. Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing AJG market cap history over the course of time is important for investors interested in comparing AJG's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of AJG versus a peer is one thing; comparing AJG market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like AJG can fluctuate over the course of history. With this page we aim to empower investors researching AJG by allowing them to research the AJG market cap history. |
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| Video: The Importance of Market Cap | |
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Video: The Importance of Market Cap
| AJG Share Performance |
| Market Cap Peers |
| Arthur J. Gallagher (AJG) is categorized under the Financials sector; to help you further research historical market cap numbers, below are some other companies in the same sector:
AJX Market Cap History AKP Market Cap History AKR Market Cap History ALBT Market Cap History ALD Market Cap History ALEX Market Cap History ALL Market Cap History ALLY Market Cap History ALRS Market Cap History ALTA Market Cap History More Financials companies » |
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