Aon Names Steven J. Bensinger Chief Financial Officer of Combined Specialty Corporation.

Business Editors

CHICAGO--(BUSINESS WIRE)--March 11, 2002

Aon Corporation (NYSE: AOC) today named Steven J. Bensinger Chief Financial Officer, Combined Specialty Corporation.

"We're very pleased to have Steven join our senior management team as Chief Financial Officer," said Dennis B. Reding, Chief Executive Officer of Combined Specialty Corporation. "With 25 years of industry experience including working closely with rating agencies, analysts and the investment community, Steve will be a valuable asset to our company."

Mr. Bensinger will report to Mr. Reding, and will be based in Atlanta.

Mr. Bensinger began his career at Coopers & Lybrand in 1976, reaching the level of Partner in 1985, with clients such as AIG, Skandia, Transatlantic Re and Crum & Forster. In 1987 he joined Skandia America Corp. as CFO, and became President and Chief Operating Officer in 1991. In 1993 Steven joined Chartwell Re Corp. as President, with responsibility for finance, actuarial, claims, IT, HR and legal departments. Chartwell was acquired by Trenwick Group in 1999, where Steve was part of management, prior to joining CSC.

Mr. Bensinger is a graduate of New York University - Stern School of Business, with a B.S. degree in Accounting and Computer Applications, graduating Cum Laude, and a Certified Public Accountant.

In 2001, Aon announced plans to spin off its underwriting operations to stockholders through a new company to be named Combined Specialty Corporation. The spin-off is scheduled for spring, 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.