<SEC-DOCUMENT>0000899140-21-000729-index.html : 20211117
<SEC-HEADER>0000899140-21-000729.hdr.sgml : 20211117
<ACCEPTANCE-DATETIME>20211117172716
ACCESSION NUMBER:		0000899140-21-000729
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20211117
DATE AS OF CHANGE:		20211117
GROUP MEMBERS:		CUBIST SYSTEMATIC STRATEGIES, LLC
GROUP MEMBERS:		POINT72 CAPITAL ADVISORS, INC.
GROUP MEMBERS:		STEVEN A. COHEN

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			X4 Pharmaceuticals, Inc
		CENTRAL INDEX KEY:			0001501697
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				273181608
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90199
		FILM NUMBER:		211421617

	BUSINESS ADDRESS:	
		STREET 1:		61 NORTH BEACON STREET
		STREET 2:		4TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02134
		BUSINESS PHONE:		857-529-8300

	MAIL ADDRESS:	
		STREET 1:		61 NORTH BEACON STREET
		STREET 2:		4TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02134

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Arsanis, Inc.
		DATE OF NAME CHANGE:	20100920

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Point72 Asset Management, L.P.
		CENTRAL INDEX KEY:			0001603466
		IRS NUMBER:				465064661
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		72 CUMMINGS POINT ROAD
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
		BUSINESS PHONE:		203-890-2000

	MAIL ADDRESS:	
		STREET 1:		72 CUMMINGS POINT ROAD
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06902
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>x111021a.htm
<DESCRIPTION>SCHEDULE 13G
<TEXT>
Document 1 - file: x111021a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>x111021b.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: x111021b.htm

</DOCUMENT>
</SEC-DOCUMENT>