Aon Corporation Completes Acquisition of ASI Solutions Incorporated.

Business Editors

CHICAGO--(BUSINESS WIRE)--May 9, 2001

Aon Corporation (NYSE: AOC) today announced the completion of its acquisition of ASI Solutions Incorporated (ASI). ASI will now operate as part of Aon Consulting Worldwide, Aon's global human resources consulting organization.

"Our human resources outsourcing and compensation consulting capabilities are greatly enhanced by the addition of ASI," stated Patrick G. Ryan, chairman and chief executive officer, Aon Corporation. "We can now provide clients with greater expertise in the key areas of attraction, retention and productivity of employees."

Donald C. Ingram, chairman and chief executive officer, Aon Consulting, continued, "We look forward to working together with ASI's management team to strengthen our client service offerings in employment practices outsourcing. Also, adding ASI's McLagan Partners compensation consulting and market share services gives us greater expertise in the financial services industry--an area where ASI has had a worldwide leadership role."

The acquisition of ASI adds to Aon Consulting's current strengths in providing human resources outsourcing services for large organizations that strive to hire, train and develop a higher quality, more effective workforce. These comprehensive employment practices outsourcing services now available through Aon Consulting makes the organization one of the largest outsourcing operations in the United States. In addition, Aon will be able to expand its compensation consulting services not only in the U.S. and United Kingdom, but in Japan and Hong Kong as well, where ASI has offices.

Bernard F. Reynolds, former chairman and chief executive officer of ASI, commented: "Now that the acquisition is complete, we are excited about bringing added services to our clients, and expanding Aon Consulting's service offerings in areas that are strategically key to the organization. All of us at ASI are delighted to begin working with all of our Aon colleagues."

About Aon

Aon Corporation (www.aon.com) is a holding company that is comprised of a family of insurance brokerage, consulting and insurance underwriting subsidiaries. Aon's common stock is listed on the New York, Chicago, Frankfurt and London stock exchanges.

Aon Consulting Worldwide is among the world's top global human resource consulting firms, with 2000 revenues of $770 million and 6,600 employees in over 120 offices worldwide. Aon Consulting delivers integrated solutions to help clients with employee benefits, compensation, human resources and management consulting.

This press release may contain 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 historical results or those anticipated, depending on a variety of factors such as general economic conditions in different countries around the world, fluctuations in global equity and fixed income markets, changes in commercial property and casualty premium rates, the competitive environment, the actual cost of resolution of contingent liabilities, the final form of the business transformation plan, the ultimate cost and timing of the implementation thereof, the actual cost savings and other benefits resulting therefrom, whether the Company ultimately implements the proposed spin-off of its underwriting operations, and the timing and terms associated therewith. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results are contained in the Company's filings with the Securities and Exchange Commission.