Proto Labs Inc (PRLB)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	3,864,146	$135,399,677	0%
2.	Bank Of New York Mellon Corp	155,288	$5,441,291	0%
3.	Rice Hall James & Associates, Llc	151,818	$5,319,703	0.31%
4.	Principal Financial Group Inc	122,057	$4,276,877	0%
5.	Rhumbline Advisers	75,015	$2,628,504	0%