Aon Corporation Completes Sale of Cambridge Integrated Services to Scandent Group.

CHICAGO -- Aon Corporation (NYSE:AOC) today announced the completion of the sale of its claims administration business, Cambridge Integrated Services Group, Inc., to Scandent Group. As a result of the sale Aon will retain a minority equity ownership position in a parent of Cambridge. Terms of the sale were not disclosed.

Patrick G. Ryan, chairman and CEO of Aon Corporation, said, "Aon's decision to enter into this new arrangement reflects our commitment to focus on core businesses, while ensuring the continued availability of claims services to clients."

Scandent Group, an international corporation headquartered in Singapore, is a leading innovator in providing technology-enabled solutions and services to a wide array of corporate and government clients around the world.

Aon Corporation (www.aon.com) is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. The company employs approximately 51,000 professionals in its 600 offices in more than 120 countries. Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions.

This press release contains certain statements relating to future results, which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results, depending on a variety of factors. Potential factors that could impact results include the general economic conditions in different countries around the world, fluctuations in global equity and fixed income markets, exchange rates, rating agency actions, resolution of pending regulatory investigations and related issues, including those related to compensation arrangements with underwriters, pension funding, ultimate paid claims may be different from actuarial estimates and actuarial estimates may change over time, changes in commercial property and casualty markets and commercial premium rates, the competitive environment, the actual costs of resolution of contingent liabilities and other loss contingencies, and the heightened level of potential errors and omissions liability arising from placements of complex policies and sophisticated reinsurance arrangements in an insurance market in which insurer reserves are under pressure. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission.