Aon Declares Quarterly Dividend

CHICAGO, April 17 /PRNewswire-FirstCall/ -- Aon Corporation (NYSE: AOC)
today declared a quarterly cash dividend of $0.15 per common share. The cash
dividend is payable on May 14, 2008 to common stockholders of record at the
close of business on May 1, 2008.
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:
Scott Malchow
Vice President, Investor Relations
312-381-3983

Media Contact:
David Prosperi
Vice President, Global Public Relations
312-381-2485

SOURCE Aon Corporation

Investors, Scott Malchow, Vice President, Investor Relations, +1-312-381-3983,
or Media, David Prosperi, Vice President, Global Public Relations,
+1-312-381-2485, both of Aon Corporation