X0306 4 2018-12-31 0 0000757011 USG CORP USG 0001481169 Carter Matthew Jr C/O USG CORPORATION 550 WEST ADAMS STREET CHICAGO IL 60661 1 0 0 0 Deferred Stock Units 2018-12-31 4 A 0 2807.3459 42.745 A Common Stock 2807.3459 23027.4613 D Deferral of the reporting person's compensation for service as a director pursuant to the USG Corporation Deferred Compensation Program for Non-Employee Directors. Each deferred stock unit represents the right to receive 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 December 31, 2018. /s/ Jonathan Dorfman, Attorney-In-Fact 2019-01-03