Aon is a British company based in London that is active in the insurance and risk management industries.
As of November 2026 Aon has a market cap of A$103.05 Billion. This makes Aon the world's 343th 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 Nov 8th, 2026 the market cap of Aon was reported to be: