X0306 4 2017-09-30 0 0000757011 USG CORP USG 0001046086 LEER STEVEN F C/O USG CORPORATION 550 W. ADAMS ST. CHICAGO IL 60661 1 0 0 0 Deferred Stock Units 2017-09-30 4 A 0 658.6001 32.645 A Common Stock 658.6001 89063.688 D Deferral of a portion of the reporting person's compensation for service as a director pursuant to the USG Corporation Deferred Compensation Program for Non-Employee Directors (the "Program"). Each deferred stock unit represents the right to receive the value of one share of common stock. The deferred stock units become payable in shares of common stock following termination of service as a director. Mean of the high and low sales prices of a share of common stock on September 29, 2017. All deferred stock units held by the reporting person under the Program become payable in shares of common stock following termination of service as a director. /s/ Jonathan Dorfman, Attorney-In-Fact 2017-10-02