Market capitalization of Arthur J. Gallagher & Co. (AJG)

Market cap: HK$529.63 Billion

As of January 2026 Arthur J. Gallagher & Co. has a market cap of HK$529.63 Billion. This makes Arthur J. Gallagher & Co. the world's 331th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Arthur J. Gallagher & Co. from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	HK$529.63 B	1.37%
2025	HK$522.46 B	-5.98%
2024	HK$555.70 B	46.54%
2023	HK$379.20 B	22.09%
2022	HK$310.59 B	12.62%
2021	HK$275.78 B	49.53%
2020	HK$184.44 B	32.21%
2019	HK$139.50 B	31.37%
2018	HK$106.19 B	18.8%
2017	HK$89.38 B	24.55%
2016	HK$71.76 B	27.85%
2015	HK$56.13 B	-6.61%
2014	HK$60.10 B	23.63%
2013	HK$48.61 B	44.13%
2012	HK$33.73 B	15.06%
2011	HK$29.31 B	19.51%
2010	HK$24.53 B	37.13%
2009	HK$17.88 B	-7.34%
2008	HK$19.30 B	11.2%
2007	HK$17.36 B	-23.19%
2006	HK$22.60 B	-1.37%
2005	HK$22.91 B	-1.5%
2004	HK$23.26 B	2.66%
2003	HK$22.66 B	11.71%
2002	HK$20.28 B	-11.37%
2001	HK$22.88 B	16.04%
2000	HK$19.72 B	112.87%
1999	HK$9.26 B	53.6%
1998	HK$6.03 B	36.24%
1997	HK$4.42 B	13.35%
1996	HK$3.90 B

End of Day market cap according to different sources

On Jan 8th, 2026 the market cap of Arthur J. Gallagher & Co. was reported to be:

HK$529.70 Billion

by Nasdaq

HK$529.53 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Aon AON	HK$589.60 B	11.32%	🇬🇧 UK
Marsh & McLennan Companies MMC	HK$712.80 B	34.58%	🇺🇸 USA
Brown & Brown BRO	HK$214.60 B	-59.48%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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