Exhibit 99(a) BANC 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 (the "Agreement"),...First Chicago NBD Corp • April 21st, 1998 • National commercial banks
Company FiledApril 21st, 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 (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 ("Newco") organized to effect the merger (such mergers, collectively, the "Merger"). Newco will be renamed Banc One Corporation ("Banc One").