<SEC-DOCUMENT>0001558370-17-004464-index.html : 20170523
<SEC-HEADER>0001558370-17-004464.hdr.sgml : 20170523
<ACCEPTANCE-DATETIME>20170523162356
ACCESSION NUMBER:		0001558370-17-004464
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20170523
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170523
DATE AS OF CHANGE:		20170523

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IMMUNOGEN INC
		CENTRAL INDEX KEY:			0000855654
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				042726691
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-17999
		FILM NUMBER:		17864002

	BUSINESS ADDRESS:	
		STREET 1:		830 WINTER ST
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		(781)895-0600

	MAIL ADDRESS:	
		STREET 1:		830 WINTER ST
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>f8-k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: f8-k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex-99d1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: ex-99d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>ex-99d1g001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: ex-99d1g001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>ex-99d1g002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: ex-99d1g002.jpg

</DOCUMENT>
</SEC-DOCUMENT>