Richard Ravin, chairman and chief executive officer of Combined Insurance Co. of America (CICA) has decided to step down from that role, effective July 1, 2007. He will remain as chairman through the end of 2007. Beginning in 2008, Ravin will become chairman-emeritus.

(Logo: http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO )

Doug Wendt will succeed Ravin as CICA's new chief executive officer, also effective July 1, 2007. He is currently CICA's president and chief operating officer. Wendt joined Aon in January, 2006 from Allstate Insurance where he spent more than 32 years serving in a number of roles, including president of Encompass, Allstate's division focusing exclusively on the sale of personal property-casualty insurance products by independent agents, where he was responsible for more than 8,000 independent agencies in 43 states.

2007 marks Ravin's 35th anniversary with Combined Insurance.

Combined Insurance Company of America and Combined Life Insurance Company of New York provide supplemental accident, health and life insurance, underwriting and distributing specialty individual accident, disability, health and life insurance products that are targeted to middle income consumers in the U.S., Europe, Canada and Asia/Pacific. Combined has a worldwide sales force of approximately 6,900 exclusive career agents service clients. Third quarter 2006 revenues were approximately $511 million.

About Aon

Aon Corporation ( http://www.aon.com/ ) is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. There are 45,000 employees working in Aon's 500 offices in more than 120 countries. Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions.

This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future 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 either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, our ability to execute the stock repurchase program, our ability to obtain regulatory or legislative changes to permit continuous sales of our supplemental Medicare health product, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, changes in revenues and earnings due to the elimination of contingent commissions, other uncertainties surrounding a new compensation model, the impact of investigations brought by state attorneys general, state insurance regulators, federal prosecutors, and federal regulators, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, and ERISA class actions, the cost of resolution of other contingent liabilities and loss contingencies, and the difference in ultimate paid claims in our underwriting companies from actuarial estimates. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission.

Media Contacts: Amy Burrell-Tichy Al Orendorff

847.953.8321 312-381-3153

First Call Analyst:
FCMN Contact: Al_Orendorff@asc.aon.com

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SOURCE: Aon Corporation

CONTACT: Media, Amy Burrell-Tichy, +1-847-953-8321, or Al Orendorff,
+1-312-381-3153

Web site: http://www.aon.com/