<SEC-DOCUMENT>0001179110-21-009040-index.html : 20211001
<SEC-HEADER>0001179110-21-009040.hdr.sgml : 20211001
<ACCEPTANCE-DATETIME>20211001161146
ACCESSION NUMBER:		0001179110-21-009040
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20210930
FILED AS OF DATE:		20211001
DATE AS OF CHANGE:		20211001

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MITCHELL DEAN J
		CENTRAL INDEX KEY:			0001199297

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-17999
		FILM NUMBER:		211299014

	MAIL ADDRESS:	
		STREET 1:		C/O BRISTOL MYERS SQUIBB CO
		STREET 2:		345 PARK AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10164

ISSUER:		

	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:			1231

	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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IMMUNOGEN INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
Document 1 - file: edgar.html

Document 1 - RAW XML: edgar.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.TXT
<SEQUENCE>2
<FILENAME>mitchellpoasept22.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
Document 2 - file: mitchellpoasept22.txt

</DOCUMENT>
</SEC-DOCUMENT>