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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
757011	Usg Corp	USG	Concrete, Gypsum & Plaster Products (3270)	363329400

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1422200	R. Christopher Griffin	C/O Usg Corporation 550 West Adams Street Chicago IL 60661	Senior Vice President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-04-22	8,035	$6.86	55,886	No	4	M	Direct
Common Stock	Disposition	2010-04-22	14,682	$22.35	41,204	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2010-04-22	8,035	$0.00	8,035	$6.86

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
24,108		2019-02-11	No	4	M	Direct

Footnotes

The per share sales price for the common stock sold in the reported transaction ranged from $22.315 to $22.49. The reporting person will provide upon request by the Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares sold at each separate price.
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.