Aon plc is a global professional services firm based in London, recognized as the second-largest insurance broker in the world. Founded in 1982 in Chicago, Aon operates in over 120 countries with a workforce of approximately 50,000 to 66,000 employees.
| Founded | 1982 (44 years) |
| Market standing | Publicly traded (NASDAQ: AON) |
| Employees | 60,000 |
| Headquarters | United Kingdom |
| Trusted networks on Proven | 4 investor, bank and government networks offer Aon Radford to their members |
| Member offers on Proven | 1 |
| Member redemption clicks | 1 |
Company facts from Apollo.io company data. Network, offer and redemption data from the Proven platform. A Proven Score is published once publicly named clients are verified with sources.
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Source: Proven platform data, public records and vendor websites. Vendors cannot pay to change a score. Methodology. Updated 2026-10-21.