Aon plc Market Cap

Aon plc has a market cap or net worth of $58.78 billion as of October 8, 2026. It is the 421st most valuable company in the world and the 218th biggest in the United States. Its market cap has decreased by 25.70% in one year.

Market Cap

58.78B

Enterprise Value

73.56B

1-Year Change

-25.70%

Global Rank

#421

Country Rank

#218 United States

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Since December 1, 1998, Aon plc's market cap has increased from $9.85B to $58.78B, an increase of 496.53%. That is a compound annual growth rate of 6.62%.

Market Cap History

Date	Market Cap	% Change
Oct 8, 2026	58.78B	-22.50%
Dec 31, 2025	75.85B	-2.35%
Dec 31, 2024	77.67B	33.31%
Dec 29, 2023	58.27B	-6.15%
Dec 30, 2022	62.08B	-6.25%
Dec 31, 2021	66.22B	37.11%
Dec 31, 2020	48.30B	-0.96%
Dec 31, 2019	48.77B	39.30%
Dec 31, 2018	35.01B	4.55%
Dec 29, 2017	33.49B	14.12%
Dec 30, 2016	29.34B	16.56%
Dec 31, 2015	25.17B	-6.90%
Dec 31, 2014	27.04B	7.07%
Dec 31, 2013	25.25B	42.51%
Dec 31, 2012	17.72B	17.13%
Dec 30, 2011	15.13B	21.40%
Dec 31, 2010	12.46B	18.67%
Dec 31, 2009	10.50B	-14.78%
Dec 31, 2008	12.32B	-11.43%
Dec 31, 2007	13.91B	27.14%
Dec 29, 2006	10.94B	-4.87%
Dec 30, 2005	11.50B	52.37%
Dec 31, 2004	7.55B	0.57%
Dec 31, 2003	7.51B	45.60%
Dec 31, 2002	5.16B	-46.08%

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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

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