Patterson Uti Energy Inc (PTEN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	55,520,175	$599,617,889	0.01%
2.	Vanguard Group Inc	45,041,600	$486,449,280	0.01%
3.	Blackstone Group L.p.	28,720,953	$310,186,292	1.39%
4.	Macquarie Group Ltd	15,895,416	$171,673,000	0.19%
5.	Dimensional Fund Advisors Lp	14,121,373	$152,513,006	0.04%