<SEC-DOCUMENT>0001104659-21-024175-index.html : 20210216
<SEC-HEADER>0001104659-21-024175.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216163309
ACCESSION NUMBER:		0001104659-21-024175
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Proto Labs Inc
		CENTRAL INDEX KEY:			0001443669
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED STRUCTURAL METAL PRODUCTS [3440]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87297
		FILM NUMBER:		21639395

	BUSINESS ADDRESS:	
		STREET 1:		5540 Pioneer Creek
		CITY:			Maple Plain
		STATE:			MN
		ZIP:			55359
		BUSINESS PHONE:		763-479-7474

	MAIL ADDRESS:	
		STREET 1:		5540 Pioneer Creek
		CITY:			Maple Plain
		STATE:			MN
		ZIP:			55359

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARK Investment Management LLC
		CENTRAL INDEX KEY:			0001697748
		IRS NUMBER:				464309299
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		3 EAST 28TH STREET, 7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10016
		BUSINESS PHONE:		212-426-7040

	MAIL ADDRESS:	
		STREET 1:		3 EAST 28TH STREET, 7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10016
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>tm216840d19_sc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: tm216840d19_sc13ga.htm

</DOCUMENT>
</SEC-DOCUMENT>