<SEC-DOCUMENT>0001628280-20-001524-index.html : 20200213
<SEC-HEADER>0001628280-20-001524.hdr.sgml : 20200213
<ACCEPTANCE-DATETIME>20200213161846
ACCESSION NUMBER:		0001628280-20-001524
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200210
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
FILED AS OF DATE:		20200213
DATE AS OF CHANGE:		20200213

FILER:

	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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38295
		FILM NUMBER:		20610820

	BUSINESS ADDRESS:	
		STREET 1:		955 MASSACHUSETTS AVENUE
		STREET 2:		4TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		857-529-8300

	MAIL ADDRESS:	
		STREET 1:		955 MASSACHUSETTS AVENUE
		STREET 2:		4TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Arsanis, Inc.
		DATE OF NAME CHANGE:	20100920
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>a8-kfeb132020.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: a8-kfeb132020.htm

</DOCUMENT>
</SEC-DOCUMENT>