Wolf Popper LLP Files ERISA Class Action Against Aon Corporation

NEW YORK, NY November 12, 2004 -- Wolf Popper LLP has filed a lawsuit in U.S. District Court for the Northern District of Illinois on behalf of participants in the Aon Corporation ("Aon") 401k Savings Plan (the "Plan") for violations of the federal pension law (ERISA) in connection with the loss of value in Aon stock (NYSE: AOC) acquired and held by present and former employees of Aon through the Plan. The goal of this litigation is to recover damages sustained by employees in the Plan. The complaint can be viewed on Wolf Popper's website or obtained from the Court.

The lawsuit alleges that the fiduciaries of the Aon Plan violated their fiduciary duties by investing Plan assets in Aon stock from November 1, 1998 to the present (the "Class Period"), during which time Aon failed to disclose certain improper business practices. In particular, during the Class Period, Aon touted itself as experiencing outstanding, sustainable growth, and as continuing to demonstrate positive results, when in truth, Aon was engaged in a plan whereby Aon steered business toward certain insurers, and shielded such companies from competition, in exchange for so-called "contingent commissions" or kickbacks. This arrangement created improper incentives for Aon to steer business towards those insurers who were, in effect, providing kickbacks to Aon.

Wolf Popper LLP has extensive experience representing shareholders in class actions and has successfully recovered billions of dollars for defrauded investors and shareholders.

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