<SEC-DOCUMENT>0001437749-21-002874-index.html : 20210216
<SEC-HEADER>0001437749-21-002874.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216060316
ACCESSION NUMBER:		0001437749-21-002874
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216
EFFECTIVENESS DATE:		20210216

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:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-253112
		FILM NUMBER:		21631730

	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>S-3ASR
<SEQUENCE>1
<FILENAME>prlb20210211_s3asr.htm
<DESCRIPTION>FORM S-3ASR
<TEXT>
Document 1 - file: prlb20210211_s3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>ex_226474.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: ex_226474.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>ex_226216.htm
<DESCRIPTION>EXHIBIT 23.2
<TEXT>
Document 3 - file: ex_226216.htm

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

</DOCUMENT>
</SEC-DOCUMENT>