Exhibit 99(a) BANK ONE CORPORATION PRO FORMA FINANCIAL INFORMATION On April 10, 1998, First Chicago NBD Corporation (the "Corporation" or "FCNBD") and BANC ONE CORPORATION ("ONE") entered into an Agreement and Plan of Reorganization as subsequently...First Chicago NBD Corp • August 17th, 1998 • National commercial banks
Company FiledAugust 17th, 1998 IndustryOn April 10, 1998, First Chicago NBD Corporation (the "Corporation" or "FCNBD") and BANC ONE CORPORATION ("ONE") entered into an Agreement and Plan of Reorganization as subsequently amended (the "Agreement"), pursuant to which, subject to the conditions and upon the terms stated therein, the Corporation and ONE will each merge into a new company, BANK ONE CORPORATION ("BANK ONE"), which was organized to effect the merger (such mergers, collectively, the "Merger").