Aon is a British company based in London that is active in the insurance and risk management industries.
As of December 2025 Aon has a market cap of โฌ64.32 Billion. This makes Aon the world's 296th 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 Dec 4th, 2025 the market cap of Aon was reported to be: