<SEC-DOCUMENT>0001193125-17-213437-index.html : 20170626
<SEC-HEADER>0001193125-17-213437.hdr.sgml : 20170626
<ACCEPTANCE-DATETIME>20170626171333
ACCESSION NUMBER:		0001193125-17-213437
CONFORMED SUBMISSION TYPE:	8-K/A
PUBLIC DOCUMENT COUNT:		5
CONFORMED PERIOD OF REPORT:	20170622
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170626
DATE AS OF CHANGE:		20170626

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			REPLIGEN CORP
		CENTRAL INDEX KEY:			0000730272
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				042729386
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14656
		FILM NUMBER:		17930571

	BUSINESS ADDRESS:	
		STREET 1:		41 SEYON STREET
		STREET 2:		BUILDING 1, SUITE 100
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02453
		BUSINESS PHONE:		7814499560

	MAIL ADDRESS:	
		STREET 1:		41 SEYON STREET
		STREET 2:		BUILDING 1, SUITE 100
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02453
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K/A
<SEQUENCE>1
<FILENAME>d385812d8ka.htm
<DESCRIPTION>8-K/A
<TEXT>
Document 1 - file: d385812d8ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>d385812dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: d385812dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>d385812dex992.htm
<DESCRIPTION>EX-99.2
<TEXT>
Document 3 - file: d385812dex992.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>d385812dex993.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 4 - file: d385812dex993.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.4
<SEQUENCE>5
<FILENAME>d385812dex994.htm
<DESCRIPTION>EX-99.4
<TEXT>
Document 5 - file: d385812dex994.htm

</DOCUMENT>
</SEC-DOCUMENT>