U.s. Silica Holdings Inc. (SLCA)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	14,987,093	$169,504,021	0%
2.	Vanguard Group Inc	7,032,533	$79,537,949	0%
3.	Dimensional Fund Advisors Lp	5,115,616	$57,858,147	0.01%
4.	Pacer Advisors, Inc.	3,817,279	$43,173,425	0.12%
5.	State Street Corp	3,594,928	$40,658,636	0%