Company Selected by Vietnam Economic Times and Vietnam Ministry of Planning and Investment CHICAGO, Feb. 14 /PRNewswire-FirstCall/ -- At the 2005 Golden Dragon Awards ceremony, held last week at the Hanoi Opera House, Aon Vietnam was pronounced winner in the category of "Best Business Style," as selected by voting and analysis by the Vietnam Economic Times and the Vietnam Ministry of Planning and Investment. (Logo: http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO ) Every January, more than 125 foreign-owned enterprises compete in a variety of categories for The Golden Dragon Awards. The 2005 "Best Business Style" is Aon's first Golden Dragon Award win. The "Best Business Style" award is given to the company that has recorded outstanding performance in the country. Vu My Lan, chief executive officer, Aon Vietnam, commented: "We are delighted to have been selected for this prestigious honor, and we pride ourselves in continuing a wonderful relationship with the Vietnam business community." Established in 1993 with offices in Hanoi and Ho Chi Minh City, Aon Vietnam is the first international licensed insurance broker and consultancy in Vietnam. 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 47,000 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. For more information, contact: Thaddeus Woosley, Aon Corporation, +1.312.381.2446, Or Vu My Lan, managing director, Aon Vietnam, +84 4 934 0928, 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, 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. First Call Analyst: FCMN Contact: Thaddeus_Woosley@asc.aon.com http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO http://photoarchive.ap.org/ DATASOURCE: Aon Corporation CONTACT: Thaddeus Woosley of Aon Corporation, +1-312-381-2446, , or Vu My Lan, managing director of Aon Vietnam, +84 4 934 0928, Web site: http://www.aon.com/

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