Aon Announces Appointments to Combined Specialty Group Specialty Property and Casualty Operation.

Business Editors

CHICAGO--(BUSINESS WIRE)--May 6, 2002

Aon (NYSE: AOC) today announced the following appointments to the Specialty P & C Group of Combined Specialty Group.

Carlton Maner, 41, has been appointed to the position of Executive Vice-President, E & S Property Division. Mr. Maner was previously Senior Vice-President of Property at ACE USA-Westchester Specialty. Prior to joining ACE in 1990, Mr. Maner held positions with Home Insurance Group and Zurich American. Mr. Maner has over 20 years experience in property insurance and catastrophe management. Mr. Maner is a graduate of Georgia State University with a degree in Insurance and Risk Management. His office will be in Atlanta.

Alan Rodrigues, 41, has been appointed Senior Vice-President, E & S Casualty Division. Mr. Rodrigues was previously Vice-President, Primary Department with General Star Management Company. Prior to joining General Star in 1986, Mr. Rodrigues held positions with Safeco and IRB. Mr. Rodrigues has over 17 years experience in casualty insurance, as well as a BS in Business from California State University and a JD from Loyola Law School in Los Angeles. He is a member of both the California and American Bar Associations. His office will be in Los Angeles.

Tim Chesson, 43, has been named Senior Vice-President, Programs Division. Mr. Chesson previously served in an executive role for the Specialty Program Division for RLI Insurance. Mr. Chesson was appointed Senior Vice President and Director of Specialty Programs for TIG Insurance in 1997, and Senior Vice President for Zurich Insurance Group in 1992, occupying various executive positions including Director of Field Operations, Marketing, Product Development and Specialty Programs. Mr. Chesson received a B.S., Business Administration, Insurance from the University of South Carolina and has over 20 years of insurance industry experience. His office will be in Atlanta.

Mr. Maner, Mr. Rodrigues and Mr. Chesson will report to Marshall Turner, President of Combined Specialty P&C Group. Mr. Turner commented, "I am pleased to have Carlton, Alan and Tim on the Combined Specialty P&C Group management team. They are accomplished leaders in their respective specialties and bring the expertise and focus our customers demand."

In 2001, Aon announced plans to spin off its underwriting operations to stockholders through a new company to be named Combined Specialty Group, Inc. The spin-off is scheduled for the 2nd quarter, 2002.

Aon Corporation (http://www.aon.com) is a holding company that is comprised of a family of insurance brokerage, consulting and insurance underwriting subsidiaries.

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, and events surrounding terrorists attacks of September 11, 2001, including the timing and resolution of related insurance and reinsurance issues. 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.