Filed by United States Steel LLC and USX Corporation Pursuant to Rules 424(b)(3) and 425 under the Securities Act of 1933 And deemed filed pursuant to Rule 13e-4 of the Securities Exchange Act of 1934 Subject Company: USX Corporation Commission File No. 333-71454 IMPORTANT NOTICE Please be advised that due to a typographical error, the Cusip numbers for the Outstanding Securities that appear on the cover of the enclosed prospectus of United States Steel LLC dated November 5, 2001, as well as on the cover of the related letters of transmittal and "To Client" letter that are enclosed, are incorrect. The correct CUSIP numbers are as follows: 6.50% Cumulative Convertible Preferred Stock of USX Corporation Cusip No. 902905 819 6.75% Convertible Quarterly Income Preferred Securities (QUIPS(SM)) of USX Capital Trust I Cusip No. 90339 E201 8.75% Cumulative Monthly Income Preferred Shares, Series A (MIPS(R)) of USX Capital LLC Cusip No. P96460 103 ----------------------- QUIPS(SM) is a service mark of Goldman, Sachs & Co. MIPS(R) is a registered trademark of Goldman, Sachs & Co.