X0303 4 2010-02-18 0 0000757011 USG CORP USG 0001349380 Khan Fareed A C/O USG CORPORATION 550 WEST ADAMS STREET CHICAGO IL 60661 0 1 0 0 Senior Vice President Common Stock 2010-02-18 4 M 0 8928 6.86 A 59054 D Common Stock 2010-02-18 4 S 0 2200 13.23 D 56854 D Common Stock 2010-02-18 4 S 0 4136 13.24 D 52718 D Common Stock 2010-02-18 4 S 0 3200 13.25 D 49518 D Common Stock 2010-02-18 4 S 0 3800 13.26 D 45718 D Common Stock 2010-02-18 4 S 0 200 13.27 D 45518 D Common Stock 30.229 I By 401(k) Plan Employee Stock Option (right to buy) 6.86 2010-02-18 4 M 0 8928 0 D 2019-02-11 Common Stock 8928 26786 D The option vested on February 11, 2010 with respect to the shares included in the reported transaction. The remaining shares subject to the option vest in three equal annual installments beginning on February 11, 2011. /s/ Ellis A. Regenbogen, Attorney-In-Fact 2010-02-19