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 S$96.84 Billion. This makes Aon the world's 292th 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 8th, 2025 the market cap of Aon was reported to be: