<SEC-DOCUMENT>0001178913-21-000595-index.html : 20210216
<SEC-HEADER>0001178913-21-000595.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216085544
ACCESSION NUMBER:		0001178913-21-000595
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216
GROUP MEMBERS:		MOSHE ARKIN
GROUP MEMBERS:		SPHERA GLOBAL HEALTHCARE GP LTD.
GROUP MEMBERS:		SPHERA GLOBAL HEALTHCARE MANAGEMENT LP

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/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90199
		FILM NUMBER:		21633021

	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:			SPHERA FUNDS MANAGEMENT LTD.
		CENTRAL INDEX KEY:			0001496201
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			L3

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		21 HA'ARBA'AH STREET
		CITY:			TEL AVIV
		STATE:			L3
		ZIP:			64739
		BUSINESS PHONE:		972-3-6845535

	MAIL ADDRESS:	
		STREET 1:		21 HA'ARBA'AH STREET
		CITY:			TEL AVIV
		STATE:			L3
		ZIP:			64739
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>zk2125590.htm
<DESCRIPTION>SC 13G/A
<TEXT>
Document 1 - file: zk2125590.htm

</DOCUMENT>
</SEC-DOCUMENT>