AOC Aon Corp.

Wolf Haldenstein Appointed Lead Counsel - AON ERISA Litigation CHICAGO, May 10 /PRNewswire/ -- Wolf Haldenstein Adler Freeman & Herz LLP was appointed interim lead class counsel on Monday, May 9, 2005, in a case on behalf of employees, participants and beneficiaries of AON Corporation's 401(k) savings plan against AON (NYSE:AOC) and certain of its corporate directors and officers for breaching their fiduciary duties to the plan participants and violating the Employee Retirement Income Security Act ("ERISA"). In making the appointment, United States District Judge Charles R. Norgle noted that Wolf Haldenstein has "committed considerable time and resources into investigating these claims. [The firm] is experienced in handling complex, large-scale class actions involving ... ERISA matters, and the conduct of corporate officers. While lead counsel, Wolf Haldenstein has settled numerous class actions, resulting in recoveries of up to $715 million for class members. In addition, Wolf Haldenstein is a large firm with offices in New York, Chicago, San Diego and West Palm Beach. Wolf Haldenstein thus has the resources necessary to adequately represent the putative class members in this case." The Court also consolidated twelve related actions. This case is captioned "In Re AON ERISA Litigation," Master Docket No. 04C6875, and is pending in the United States District Court, Northern District of Illinois. Wolf Haldenstein has extensive experience in the prosecution of complex financial litigation, including class actions in federal trial and state courts throughout the country. The firm has more than 60 attorneys in various practice areas; and offices in Chicago, New York City, San Diego, and West Palm Beach. Wolf Haldenstein's reputation and expertise in shareholder and other class litigation has been repeatedly recognized by the courts, which have appointed it to leadership positions in complex securities, anti-trust, ERISA, and other consolidated litigation. If you wish to discuss this or any other ERISA action, or have any questions, please contact Wolf Haldenstein Adler Freeman & Herz LLP at (800) 575-0735 or (312) 984-0000 (Fred Taylor Isquith, Esq., Mark C. Rifkin, Esq., Adam Levitt, Esq., Gustavo Bruckner, Esq. or Derek Behnke), via e-mail at , or visit our website at http://www.whafh.com/. DATASOURCE: Wolf Haldenstein Adler Freeman & Herz LLP CONTACT: Fred Taylor Isquith, Mark C. Rifkin, Adam Levitt, Gustavo Bruckner, or Derek Behnke, all of Wolf Haldenstein Adler Freeman & Herz LLP, 1-800-575-0735 or +1-312-984-0000, or Web site: http://www.whafh.com/

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