X0306 4 2018-10-02 0 0000757011 USG CORP USG 0001189027 HERNANDEZ WILLIAM H C/O USG CORPORATION 550 WEST ADAMS STREET CHICAGO IL 60661 1 0 0 0 Deferred Stock Units 2018-10-02 4 A 0 311.8082 43.375 A Common Stock 311.8082 27361.1666 D 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. Reflects the reinvestment of dividend equivalents in additional deferred stock units pursuant to the USG Corporation Deferred Compensation Program for Non-Employee Directors. Mean of the high and low sales prices of a share of common stock on October 2, 2018. Deferred stock units granted to the reporting person prior to August 30, 2017 become payable in cash or shares of common stock, at the reporting person's option, following termination of service as a director. /s/ Jonathan Dorfman, Attorney-In-Fact 2018-10-03