X0306 4 2021-08-18 0 0001163302 UNITED STATES STEEL CORP X 0001626558 Bruno James E. 600 GRANT STREET PITTSBURGH PA 15219 0 1 0 0 Sr. VP - European Solutions United States Steel Corporation Common Stock 2021-08-18 4 S 0 15000 30.22 D 127485 D United States Steel Corporation Common Stock 4724.826 I By 401(k) Plan This transaction was completed pursuant to the terms of a 10b5-1 trading plan. The price in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.00 to $30.56, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer 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 footnote (2) to this Form 4. Megan Bombick by power of attorney 2021-08-20