UNITED STATES 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): MAY 23, 2002 MARATHON OIL CORPORATION (Exact name of registrant as specified in its charter) DELAWARE 1-5153 25-0996816 (State or other jurisdiction (Commission File Number) (IRS Employer of incorporation) Identification No.) 5555 SAN FELIPE ROAD, HOUSTON, TEXAS 77056-2723 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (713) 629-6600 ------------------------------ ITEM 5. OTHER EVENTS. On May 23, 2002, Marathon Oil Corporation ("Marathon") entered into an underwriting agreement for the public offering of $450,000,000 aggregate principal amount of its 5.375% Notes due 2007 (the "Notes"). The Notes are to be issued under an Indenture dated February 26, 2002 between the Company and JPMorgan Chase Bank, as Trustee, relating to senior debt securities of Marathon (the "Senior Indenture"). Closing of the issuance and sale of the Notes is scheduled for May 29, 2002. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits. 1.1 Underwriting Agreement dated May 23, 2002 among Marathon and J.P. Morgan Securities Inc. and Salomon Smith Barney Inc., as representatives of the several Underwriters. 1.2 Pricing Agreement dated May 23, 2002 among Marathon and J.P. Morgan Securities Inc. and Salomon Smith Barney Inc., as representatives of the several Underwriters. 4.1 Officers' Certificate delivered pursuant to Sections 1.02, 2.01, 3.01 and 3.03 of the Senior Indenture dated as of May 29, 2002, providing for the issuance of Marathon's 5.375% Notes due 2007. 4.2 Form of Notes (included in Exhibit 4.1 above). 5.1 Opinion of Baker Botts L.L.P. 2 SIGNATURE 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. MARATHON OIL CORPORATION Date: May 29, 2002 By: /s/ PAUL C. REINBOLT -------------------------------------- Name: Paul C. Reinbolt Title: Vice President Finance & Treasurer EXHIBIT INDEX Number Exhibit ------ ------- 1.1 Underwriting Agreement dated May 23, 2002 among Marathon and J.P. Morgan Securities Inc. and Salomon Smith Barney Inc., as representatives of the several Underwriters. 1.2 Pricing Agreement dated May 23, 2002 among Marathon and J.P. Morgan Securities Inc. and Salomon Smith Barney Inc., as representatives of the several Underwriters. 4.1 Officers' Certificate delivered pursuant to Sections 1.02, 2.01, 3.01 and 3.03 of the Senior Indenture dated as of May 29, 2002, providing for the issuance of Marathon's 5.375% Notes due 2007. 4.2 Form of Notes (included in Exhibit 4.1 above). 5.1 Opinion of Baker Botts L.L.P.