<SEC-DOCUMENT>0001193125-15-017881-index.html : 20150122
<SEC-HEADER>0001193125-15-017881.hdr.sgml : 20150122
<ACCEPTANCE-DATETIME>20150122215411
ACCESSION NUMBER:		0001193125-15-017881
CONFORMED SUBMISSION TYPE:	S-1MEF
PUBLIC DOCUMENT COUNT:		3
<REFERENCE-462B>333-201439
FILED AS OF DATE:		20150122
DATE AS OF CHANGE:		20150122
EFFECTIVENESS DATE:		20150122

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ZAFGEN, INC.
		CENTRAL INDEX KEY:			0001374690
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				203857670
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1MEF
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-201650
		FILM NUMBER:		15543246

	BUSINESS ADDRESS:	
		STREET 1:		ONE BROADWAY, 8TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		(617 ) 401-3051

	MAIL ADDRESS:	
		STREET 1:		ONE BROADWAY, 8TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ZAFGEN INC
		DATE OF NAME CHANGE:	20060906
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-1MEF
<SEQUENCE>1
<FILENAME>d857439ds1mef.htm
<DESCRIPTION>S-1MEF
<TEXT>
Document 1 - file: d857439ds1mef.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d857439dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: d857439dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>d857439dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: d857439dex231.htm

</DOCUMENT>
</SEC-DOCUMENT>