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Aon is the UK’s largest insurance broker (Insurance Times, August 2014) and leading global provider of risk management services, number one reinsurance broker and a leading player in the UK's human resources solutions and outsourcing services. With 6,000 employees in 23 offices across the country, of which 2,500 are based at our UK headquarters at 122 Leadenhall, Aon combines an in-depth knowledge of the UK market with global reach and perspective. Aon’s structure cuts across boundaries and unites specialists from around the world in our Global Client Network.

Aon UK Questions

The Aon UK annual revenue was $15.7 billion in 2026.

Aon UK is based in Dublin, Leinster.

The NAICS codes for Aon UK are [52, 55, 551, 524, 551112, 5511, 55111].

The SIC codes for Aon UK are [64, 6321, 635, 632, 641, 6411, 63].

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