U. S. Steel(X) - 2018 Q4 - Annual Report

2018 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2018 Commission file number 1-16811 (Exact name of registrant as specified in its charter) Delaware 25-1897152 (State of Incorporation) (I.R.S. Employer Identification No.) 600 Grant Street, Pittsburgh, PA 15219-2800 (Address of principal executive offices) Tel. No. (412) 433-1121 Securities register ...