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Aon Corporation is the leading global provider of risk management services, insurance and reinsurance brokerage and human capital consulting. The products and services we deliver are built around our clients’ unique needs and provided by professionals w

Aon in the UK

Aon is the UK's largest insurance broker (Insurance Times, August 2010) and provider of risk management services, number one reinsurance broker and number four in the UK human capital consulting market. With 5,000 staff in 30 offices across the country, 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.

What makes Aon a global industry leader?

At Aon, we know that globalisation demands two capabilities: gather the best thinking from around the world and then deliver solutions locally. With worldwide distribution, a vast base of intellectual capital and leading technology, we've built a company to achieve these goals. Our global resources, technical expertise and industry knowledge are delivered locally through 59,000 professionals working in more than 500 offices in more than 120 countries.

Read more about how we operate, see our company overview

Some of our credentials

Aon was ranked by A.M. Best as the No. 1 global insurance brokerage in 2009, based on brokerage revenues, and best reinsurance intermediary and best employee benefits consulting firm in 2008 by the readers of Business Insurance magazine.

Our core services

Insurance and risk management

Insurance and risk management is the cornerstone of every company's capital structure. A poorly constructed programme leaves your organisation vulnerable to major risks, while a well-designed one frees you to pursue your vision without having to hoard financial capital or maintain unusually high levels of liquidity.

Aon Hewitt

We're a global leader in providing employee benefit consulting and benefit solutions that deliver long-term value to clients of all sizes, across all industries. Our experts deliver market-leading pensions administration and consulting, as well as employee benefits programmes and cost-effective, efficient HR solutions.


Reinsurance is critical to helping insurance companies underwrite risk profitably. Aon Benfield, the world's leading reinsurance broker and intermediary, provides clients with integrated capital solutions and services. These are delivered to agents, brokers, associations, affinity groups and individual customers, as well as companies of all sizes, through Aon's global network of local resources.

+44 (0)20 7623 5500
The Aon Centre
The Leadenhall Building
122 Leadenhall Street
London, EC3V 4AN
United Kingdom
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