Aon is a British company based in London that is active in the insurance and risk management industries.
As of October 2026 Aon has a market cap of NZ$121.24 Billion. This makes Aon the world's 366th 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.
On Oct 28th, 2026 the market cap of Aon was reported to be: