Patterson Uti Energy Inc (PTEN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	54,992,038	$284,858,758	0%
2.	Vanguard Group Inc	42,796,088	$221,683,736	0%
3.	Blackstone Group L.p.	28,061,526	$145,358,705	0.59%
4.	Fuller & Thaler Asset Management, Inc.	17,953,233	$92,997,747	0.32%
5.	Dimensional Fund Advisors Lp	17,000,602	$88,065,226	0.02%