CHICAGO, April 18, 2011 /PRNewswire/ -- Aon Corporation (NYSE: AON) plans to announce first quarter 2011 results on Friday, April 29, 2011 in a news release to be issued before the market opens.  Greg Case, president and CEO, will host a conference call at 7:30 am Central Time on Friday, April 29, 2011.  The conference call will be broadcast live through Aon's website at www.aon.com. Windows Media Player is required to listen to this webcast. A replay will be available shortly after the live webcast.  The earnings release will be available on Aon's web site at www.aon.com.

About Aon

Aon Corporation (NYSE:AON) is the leading global provider of risk management services, insurance and reinsurance brokerage, and human capital solutions and outsourcing. Through its more than 59,000 colleagues worldwide, Aon unites to deliver distinctive client value via innovative and effective risk management and workforce productivity solutions. Aon's industry-leading global resources and technical expertise are delivered locally in over 120 countries. Named the world's best broker by Euromoney magazine's 2008, 2009 and 2010 Insurance Survey, Aon also ranked highest on Business Insurance's listing of the world's insurance brokers based on commercial retail, wholesale, reinsurance and personal lines brokerage revenues in 2008 and 2009. A.M. Best deemed Aon the number one insurance broker based on revenues in 2007, 2008 and 2009, and Aon was voted best insurance intermediary 2007-2010, best reinsurance intermediary 2006-2010, best captives manager 2009-2010, and best employee benefits consulting firm 2007-2009 by the readers of Business Insurance. Visit http://www.aon.com for more information on Aon and http://www.aon.com/unitedin2010 to learn about Aon's global partnership and shirt sponsorship with Manchester United.

SOURCE Aon Corporation