Market capitalization of Aon (AON)

Market cap: HK$589.01 Billion

As of January 2026 Aon has a market cap of HK$589.01 Billion. This makes Aon the world's 317th 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 Aon from 1996 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	HK$589.01 B	-1.56%
2025	HK$598.35 B	-1.11%
2024	HK$605.07 B	32.96%
2023	HK$455.06 B	-6.19%
2022	HK$485.08 B	-6.06%
2021	HK$516.37 B	37.91%
2020	HK$374.42 B	-0.55%
2019	HK$376.50 B	37.76%
2018	HK$273.30 B	4.46%
2017	HK$261.62 B	14.98%
2016	HK$227.54 B	18%
2015	HK$192.82 B	-6.37%
2014	HK$205.95 B	5.29%
2013	HK$195.60 B	45.96%
2012	HK$134.01 B	14.04%
2011	HK$117.51 B	-1.24%
2010	HK$118.98 B	50.3%
2009	HK$79.16 B	-16.87%
2008	HK$95.23 B	-15.84%
2007	HK$113.15 B	37.41%
2006	HK$82.34 B	-8.02%
2005	HK$89.52 B	52.41%
2004	HK$58.74 B	0.81%
2003	HK$58.26 B	44.9%
2002	HK$40.21 B	-46.07%
2001	HK$74.56 B	6.81%
2000	HK$69.81 B	-12.4%
1999	HK$79.69 B	9.22%
1998	HK$72.96 B	-5.8%
1997	HK$77.45 B	45.3%
1996	HK$53.31 B

End of Day market cap according to different sources

On Jan 30th, 2026 the market cap of Aon was reported to be:

HK$587.99 Billion

by Nasdaq

HK$589.01 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Marsh & McLennan Companies MMC	HK$701.73 B	19.14%	🇺🇸 USA
Prudential PUK	HK$325.52 B	-44.73%	🇬🇧 UK
Arch Capital ACGL	HK$280.03 B	-52.46%	🇧🇲 Bermuda
AXIS Capital AXS	HK$63.01 B	-89.30%	🇧🇲 Bermuda

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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