AOC Aon Corp.

CHICAGO, May 7 /PRNewswire-FirstCall/ -- Aon Corporation (NYSE:AOC) Executive Chairman, Patrick G. Ryan, will host the Company's Annual Shareholders' Meeting on Friday, May 16, 2008 at 10:00 a.m. Central Time. A webcast of the presentation and question-and-answer session with shareholders attending the meeting in Chicago will be available via the Internet. This listen-only webcast can be accessed by going to the home page of Aon's web site at http://www.aon.com/. The webcast will be archived for two weeks. About Aon Aon Corporation (NYSE:AOC) is the leading global provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting. Through its 36,000 colleagues worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions. Our industry-leading global resources, technical expertise and industry knowledge are delivered locally through more than 500 offices in more than 120 countries. Aon was named the world's "best broker" by Euromoney magazine's 2008 Insurance Survey. Aon also was ranked by A.M. Best as the number one global insurance brokerage in 2007 based on brokerage revenues, and voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 by the readers of Business Insurance. For more information on Aon, log onto http://www.aon.com/. Investor Contact: Media Contact: Scott Malchow David Prosperi Vice President, Vice President, Investor Relations Global Public Relations 312-381-3983 312-381-2485 DATASOURCE: Aon Corporation CONTACT: Investors, Scott Malchow, Vice President, Investor Relations, +1-312-381-3983, or Media, David Prosperi, Vice President, Global Public Relations, +1-312-381-2485 Web site: http://www.aon.com/

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