Salah Gregory D. [Rocket]

Date	Name	Symbol	Type	Security	Shares	Price	Value	Ownership	Reported
04/24/2019	USG CORP	USG	Disposition	Market Share Units	17.5k	$43.50	$762.6k		04/24/2019
04/24/2019	USG CORP	USG	Disposition	Market Share Units	16.1k	$43.50	$701.3k		04/24/2019
04/24/2019	USG CORP	USG	Disposition	Common Stock	3k	$43.50	$130.5k	See Footnote	04/24/2019
04/24/2019	USG CORP	USG	Disposition	Common Stock	60.4k	$43.50	$2.6M		04/24/2019
03/01/2019	USG CORP	USG	Gift	Common Stock	2.3k	$0.00	$0		04/24/2019
02/13/2019	USG CORP	USG	Grant	Common Stock	1.5k	$0.00	$0		02/13/2019
02/13/2019	USG CORP	USG	Payment of Exercise	Common Stock	362	$43.17	$15.6k		02/13/2019
02/13/2019	USG CORP	USG	Payment of Exercise	Common Stock	861	$43.17	$37.2k		02/13/2019
02/13/2019	USG CORP	USG	Exercise	Market Share Units	2.1k	$0.00	$0		02/13/2019
12/26/2018	USG CORP	USG	Grant	Common Stock	13.6k	$0.00	$0		12/26/2018
12/26/2018	USG CORP	USG	Payment of Exercise	Common Stock	6.4k	$42.85	$275.3k		12/26/2018
12/26/2018	USG CORP	USG	Payment of Exercise	Common Stock	13.1k	$42.85	$562.6k		12/26/2018
12/26/2018	USG CORP	USG	Exercise	Market Share Units	18.5k	$0.00	$0		12/26/2018
12/01/2018	USG CORP	USG	Payment of Exercise	Common Stock	1.2k	$43.04	$51k		12/01/2018
07/30/2018	USG CORP	USG	Sale	Common Stock	6.9k	$43.12	$296.9k		07/30/2018
07/30/2018	USG CORP	USG	Exercise	Employee Stock Option (Right to Buy)	3k	$18.99	$57.4k		07/30/2018
07/30/2018	USG CORP	USG	Exercise	Employee Stock Option (Right to Buy)	3.9k	$14.76	$57k		07/30/2018
02/14/2018	USG CORP	USG	Grant	Market Share Units	17.5k	$0.00	$0		02/14/2018
02/14/2018	USG CORP	USG	Exercise	Market Share Units	2.9k	$0.00	$0		02/14/2018
02/14/2018	USG CORP	USG	Payment of Exercise	Common Stock	1.3k	$33.88	$42.5k		02/14/2018
12/06/2017	USG CORP	USG	Sale	Common Stock	3.5k	$37.75	$131.2k		12/06/2017
12/06/2017	USG CORP	USG	Exercise	Employee Stock Option (Right to Buy)	3.5k	$34.67	$120.5k		12/06/2017
12/05/2016	USG CORP	USG	Exercise	Employee Stock Option (Right to Buy)	3.6k	$11.98	$43.1k		12/05/2016
12/05/2016	USG CORP	USG	Exercise	Employee Stock Option (Right to Buy)	1.5k	$6.86	$10.6k		12/05/2016
12/05/2016	USG CORP	USG	Sale	Common Stock	2.9k	$29.60	$84.7k		12/05/2016