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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1524741	U.s. Silica Holdings Inc.	SLCA	Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400)	263718801

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1531831	Adair Bryan Shinn	C/O U.s. Silica Holdings, Inc. 8490 Progress Drive Frederick MD 21701	President & Ceo	Yes	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, Par Value $0.01	Disposition	2013-11-20	1,196,000	$30.70	4,526,471	No	4	S	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, Par Value $0.01	17,285	Direct

Footnotes

On November 20, 2013, GGC USS Holdings, LLC ("Holdings") sold an additional 1,196,000 shares in connection with the exercise of the underwriter's option to purchase additional shares pursuant to the underwriting agreement for the offering of shares that closed on November 14, 2013.
Mr. Shinn has a beneficial ownership interest in Holdings, which is the direct beneficial owner of shares of common stock of U.S. Silica Holdings, Inc. Mr. Shinn does not have voting or dispositive power over shares held by Holdings. Mr. Shinn disclaims beneficial ownership of the shares held by Holdings, except to the extent of his pecuniary interest therein.