<SEC-DOCUMENT>0001437749-18-006458-index.html : 20180406
<SEC-HEADER>0001437749-18-006458.hdr.sgml : 20180406
<ACCEPTANCE-DATETIME>20180406122040
ACCESSION NUMBER:		0001437749-18-006458
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		10
CONFORMED PERIOD OF REPORT:	20180516
FILED AS OF DATE:		20180406
DATE AS OF CHANGE:		20180406
EFFECTIVENESS DATE:		20180406

FILER:

	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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35435
		FILM NUMBER:		18742532

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>prlb20180320_def14a.htm
<DESCRIPTION>FORM DEF 14A
<TEXT>
Document 1 - file: prlb20180320_def14a.htm

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>n4.jpg
<TEXT>
Document 2 - file: n4.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>n3.jpg
<TEXT>
Document 3 - file: n3.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>n2.jpg
<TEXT>
Document 4 - file: n2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>n1.jpg
<TEXT>
Document 5 - file: n1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>p2.jpg
<TEXT>
Document 6 - file: p2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>p1.jpg
<TEXT>
Document 7 - file: p1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>performancegraph.jpg
<TEXT>
Document 8 - file: performancegraph.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>jasonfrankmansignature.jpg
<TEXT>
Document 9 - file: jasonfrankmansignature.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>svenwehrweinsignature.jpg
<TEXT>
Document 10 - file: svenwehrweinsignature.jpg

</DOCUMENT>
</SEC-DOCUMENT>