Ptc Therapeutics Inc. (PTCT)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Vanguard Group Inc	8,607,372	$438,631,678	0.01%
2.	Blackrock, Inc.	7,768,217	$395,868,338	0.01%
3.	Fmr Llc	2,013,562	$102,611,119	0.01%
4.	Pictet Asset Management Holding Sa	1,042,458	$54,011,142	0.06%
5.	Nuveen, Llc	1,009,168	$51,427,201	0.02%