Press Releases and Announcements

Aon Acquires RiskLabs:  Leading risk information systems provider will strengthen Aon’s global capability in this market

March 22, 2004

CHICAGO/LONDON, March 22, 2004. --- Aon Corporation (NYSE: AOC) announced that it has purchased Risk Laboratories, LLC (RiskLabs), a leading risk management information systems (RMIS) provider from American Home Assurance Company.

Founded in 1994 and based in Atlanta, Ga., RiskLabs provides risk information services and analytics to corporate risk managers. Its core product is RiskConsoleŽ, a web-based RMIS that integrates claims, loss control and other types of data to assist in risk management decision-making. It also helps corporate executives better manage and control their organization’s total cost of risk.

“Severe cost pressures, the growing complexity of risk programs and increased governmental oversight are forcing risk managers to more deeply mine their data for better business intelligence. A robust, flexible RMIS such as RiskConsoleŽ can deliver the insight and comprehensive reporting that today’s risk manager needs to stay on top of a fast-changing business and regulatory landscape,” said Michael D. O’Halleran, President and Chief Operating Officer of Aon Corporation.

RiskConsoleŽ was built solely for use on the Internet, and can be accessed from anywhere with a web browser, making it especially valuable to multinational or distributed organizations.

“Global and multinational companies are increasingly looking to technological solutions such as RiskConsoleŽ to enhance the collection and analysis of their risk data and to more quickly uncover factors driving the cost of risk,” said Dick Verbeek, CEO of Aon Risk Services International.

RiskLabs has won several awards for its software, including “Product of the Year” four years in a row by Risk & Insurance magazine. Its flexible software components can be configured to individual client specifications. The company offers a complete suite of RMIS modules designed for the needs of today's risk managers, including Enterprise Risk Management software that aggregates and evaluate risks across the organization.

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 54,000 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.
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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, 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, 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, and the timing and resolution of related insurance and reinsurance issues relating to the events of September 11, 2001. 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.

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