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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
1531253	Rajeev Amara	C/O Golden Gate Private Equity, Inc. One Embarcadero Center, 39Th Floor San Francisco CA 94111		Yes	No	Yes	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	2013-03-19	9,775,000	$21.12	31,401,471	No	4	S	Indirect	See Footnotes

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

Footnotes

Mr. Amara is a Managing Director of Golden Gate Capital, a private equity firm and sponsor of GGC USS Holdings, LLC ("Holdings"). Holdings is the direct beneficial owner of 31,401,471 shares of common stock of U.S. Silica Holdings, Inc. The shares beneficially owned directly by Holdings are beneficially owned indirectly by (a) Golden Gate Capital Opportunity Fund, L.P., (b) Golden Gate Capital Opportunity Fund-A, L.P., (c) GGCOF Third-Party Co-Invest, L.P. and (d) GGCOF Co-Invest, L.P. The shares indirectly held by the funds listed in clauses (a) through (c) are beneficially owned indirectly by their general partner, GGC Opportunity Fund Management, L.P. ("Management GP"), and the general partner of Management GP, GGC Opportunity Fund Management GP, Ltd. ("Ultimate GP"). (Continued in footnote 2)
The shares indirectly held by the fund listed in clause (d) are beneficially owned indirectly by its general partner, GGCOF Co-Invest Management, L.P. ("GGCOF Management"), the general partner of GGCOF Management, Management GP, and the general partner of Management GP, Ultimate GP. Ultimate GP has voting and dispositive authority over the shares held by Holdings and is governed by its board of directors. Mr. Amara disclaims beneficial ownership of the shares held by Holdings, except to the extent of his pecuniary interest therein.