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): March 28, 2007 United States Steel Corporation -------------------------------------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 1-16811 25-1897152 --------------- ---------------------- ------------------- (State or other (Commission File (IRS Employer jurisdiction of Number) Identification No.) incorporation) 600 Grant Street, Pittsburgh, PA 15219-2800 ---------------------------------- ---------- (Address of principal executive (Zip Code) offices) (412) 433-1121 ------------------------------ (Registrant's telephone number, including area code) -------------------------------------------------------------------------------- Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) 2 Item 1.01 Entry into a Material Definitive Agreement. Effective as of March 28, 2007, United States Steel Corporation ("U. S. Steel") entered into a Commitment Letter with JPMorgan Chase Bank, N.A. ("JPMorgan Chase") and J.P. Morgan Securities, Inc. ("JPMorgan") pursuant to which (i) JPMorgan agreed to structure, arrange and syndicate for U. S. Steel three senior credit facilities in an aggregate amount of $1,750,000,000 (the "Facilities"); and (ii) JPMorgan Chase committed to provide the full amount of the Facilities and to serve as administrative agent for the Facilities. Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The disclosure under Item 1.01 of this Current Report on Form 8-K is incorporated in this Item 2.03 by reference. 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. UNITED STATES STEEL CORPORATION By /s/ Larry G. Schultz --------------------------- Larry G. Schultz Vice President & Controller Dated: April 3, 2007