Patterson Uti Energy Inc (PTEN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	58,306,508	$356,252,765	0.01%
2.	Vanguard Group Inc	42,214,498	$257,930,582	0%
3.	Blackstone Group L.p.	28,061,526	$171,455,924	0.68%
4.	Dimensional Fund Advisors Lp	18,465,704	$112,824,570	0.02%
5.	Fuller & Thaler Asset Management, Inc.	16,432,955	$100,405,356	0.33%