<SEC-DOCUMENT>0001104659-22-023139-index.html : 20220214
<SEC-HEADER>0001104659-22-023139.hdr.sgml : 20220214
<ACCEPTANCE-DATETIME>20220214170716
ACCESSION NUMBER:		0001104659-22-023139
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20220214
DATE AS OF CHANGE:		20220214
GROUP MEMBERS:		JEREMY C. GREEN

SUBJECT COMPANY:	

	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

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-40774
		FILM NUMBER:		22634494

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Redmile Group, LLC
		CENTRAL INDEX KEY:			0001425738
		IRS NUMBER:				208592298
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, SUITE D3-300
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
		BUSINESS PHONE:		415-489-9980

	MAIL ADDRESS:	
		STREET 1:		ONE LETTERMAN DRIVE
		STREET 2:		BUILDING D, SUITE D3-300
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94129
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>tm226094d27_sc13ga.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: tm226094d27_sc13ga.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>tm226094d27_ex99-1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: tm226094d27_ex99-1.htm

</DOCUMENT>
</SEC-DOCUMENT>