SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 17, 2001 BANK ONE CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-15323 31-0738296 (State or other jurisdiction (Commission File Number) (IRS Employer of incorporation) Identification No.) 1 Bank One Plaza, Chicago, IL 60670 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: 312-732-4000 Item 5. Other Events and Regulation FD Disclosure ------ On April 17, 2001, the Registrant issued a press release announcing its 2001 first quarter earnings. A copy of the press release, including unaudited financial information released as a part thereof, is attached as Exhibit 99(a) to this Current Report on Form 8-K and incorporated by reference herein. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits ------ (c) Exhibits. Exhibit Number Description of Exhibits -------------- ----------------------- 99(a) Registrant's April 17, 2001 Press Release announcing its 2001 first quarter earnings. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. BANK ONE CORPORATION (Registrant) Date: April 17, 2001 By: /s/ Charles W. Scharf ---------------- ------------------------------- Title: Chief Financial Officer -2- EXHIBIT INDEX Exhibit Number Description of Exhibits -------------- ----------------------- 99(a) Registrant's April 17, 2001 Press Release announcing its 2001 first quarter earnings. -3-