X0306 4 2016-11-23 0 0001163302 UNITED STATES STEEL CORP X 0001204586 BURRITT DAVID B 600 GRANT STREET PITTSBURGH PA 15219 0 1 0 0 Exec. VP and CFO Common Stock 2016-11-23 4 S 0 51791 32.56 D 135672 D Common Stock 6526.516 I By 401(k) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions ranging in price from $32.49 to $32.68, inclusive. The reporting person undertakes to provide to United States Steel Corporation, any security holder of United States Steel Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. /s/ Arden T. Phillips by Power of Attorney 2016-11-28