<SEC-DOCUMENT>0001193805-21-001508-index.html : 20211028
<SEC-HEADER>0001193805-21-001508.hdr.sgml : 20211028
<ACCEPTANCE-DATETIME>20211028191534
ACCESSION NUMBER:		0001193805-21-001508
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20211026
FILED AS OF DATE:		20211028
DATE AS OF CHANGE:		20211028

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)
		CENTRAL INDEX KEY:			0001009258
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40925
		FILM NUMBER:		211359996

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH, 12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		2125511600

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH, 12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD MANAGEMENT CO
		DATE OF NAME CHANGE:	20131114

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD MANAGEMENT CO /NY
		DATE OF NAME CHANGE:	19981022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Deerfield Mgmt L.P.
		CENTRAL INDEX KEY:			0001010823

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40925
		FILM NUMBER:		211359998

	BUSINESS ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2125511600

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD CAPITAL LP
		DATE OF NAME CHANGE:	20050930

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD CAPITAL LP ET AL
		DATE OF NAME CHANGE:	19960318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Deerfield Mgmt V, L.P.
		CENTRAL INDEX KEY:			0001876688
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40925
		FILM NUMBER:		211359995

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH, 12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		212-551-1600

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH, 12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Flynn James E
		CENTRAL INDEX KEY:			0001352546

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40925
		FILM NUMBER:		211359999

	MAIL ADDRESS:	
		STREET 1:		780 THIRD AVENUE
		STREET 2:		37TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DEERFIELD PARTNERS, L.P.
		CENTRAL INDEX KEY:			0001301041
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40925
		FILM NUMBER:		211359997

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH
		STREET 2:		12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		212-551-1600

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE SOUTH
		STREET 2:		12TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010

	FORMER NAME:	
		FORMER CONFORMED NAME:	DEERFIELD PARTNERS, LP
		DATE OF NAME CHANGE:	20040819

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Xilio Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001840233
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				851623397
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		828 WINTER STREET
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		617-833-1027

	MAIL ADDRESS:	
		STREET 1:		828 WINTER STREET
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>e621041_4-xilio.xml
<TEXT>
Document 1 - file: e621041_4-xilio.html

Document 1 - RAW XML: e621041_4-xilio.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>e621041_ex99.htm
<TEXT>
Document 2 - file: e621041_ex99.htm

</DOCUMENT>
</SEC-DOCUMENT>