Patterson Uti Energy Inc (PTEN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	58,686,717	$482,404,819	0.01%
2.	Vanguard Group Inc	43,742,781	$359,565,660	0.01%
3.	Blackstone Group L.p.	28,061,525	$230,665,736	0.96%
4.	Fuller & Thaler Asset Management, Inc.	16,915,483	$139,045,269	0.54%
5.	State Street Corp	15,407,391	$126,648,754	0.01%