Pomerantz Haudek Block Grossman & Gross LLP Announces Summary Notice of Pendency of Class Action in Bank One Corporation.

NEW YORK -- Pomerantz Haudek Block Grossman & Gross LLP:

        PLEASE READ THIS NOTICE CAREFULLY AND IN ITS ENTIRETY. YOUR
        RIGHTS MAY BE AFFECTED BY PROCEEDINGS IN THIS ACTION.

        All persons or entities who purchased shares of Banc One
        Corporation ("Old Banc One") common stock during the period of
        August 6, 1998 through October 1, 1998, both dates inclusive,
        and received Bank One Corporation ("Bank One") common stock
        through the conversion of Old Banc One common stock to Bank
        One common stock issued in connection with the merger between
        Old Banc One and First Chicago NBD Corporation ("First
        Chicago") effective October 2, 1998 (the "Class").

        Excluded from the Class are (a) all Bank One common stock of
        former Old Banc One shareholders which were sold prior to
        August 30, 1999, and (b) the Individual Defendants, officers
        and directors of Bank One, members of the Individual
        Defendants' immediate families, any entity in which any
        defendant has a controlling interest, and the legal
        representatives, heirs, successors or assigns of any such
        excluded person.

Notice is hereby given pursuant to Rule 23 of the Federal Rules of Civil Procedure and an Order of the United States District Court for the Northern District of Illinois, Eastern Division (the "Court"), entered November 9, 2004, certifying the above action as a Class Action. This Action has not been settled and continues to be litigated. Accordingly, no claim form need be filed at this time.

If you are a member of the Class, your rights are affected by this action and you may have the right to participate in any recovery. You also have the right to exclude yourself from the Class in accordance with the directions set forth in a more detailed Notice of Pendency of Class Action, which was mailed to persons and entities identified from the records of defendant Bank One Corporation as members of the Class. That Notice of Pendency of Class Action describes the Class Action and your rights with respect thereto.

If you have not received a more detailed Notice by mail, please contact in writing:

                        Notice Administrator
            Old Banc One Corporation Securities Litigation
                 c/o Berdon Claims Administration LLC
                            P.O. Box 9014
                     Jericho, New York 11753-8914
                      Telephone:  [phone]

Inquiries, other than requests for the Notice, may be made to Co-Counsel for the Class:

Robin F. Zwerling, Esq.           Patrick V. Dahlstrom, Esq.
Hillary Sobel, Esq.               Leigh Handelman Smollar, Esq
Zwerling, Schachter &             Pomerantz Haudek Block
  Zwerling, LLP                   Grossman & Gross LLP
41 Madison Avenue                 One North LaSalle Street, Suite 2225
New York, New York 10010          Chicago, Illinois 60602
http://www.zsz.com                http://www.pomerantzlaw.com/

          INQUIRIES SHOULD NOT BE DIRECTED TO THE COURT, THE
        CLERK'S OFFICE, THE DEFENDANTS, OR DEFENDANTS' COUNSEL