<SEC-DOCUMENT>0001973141-23-000106.txt : 20230623
<SEC-HEADER>0001973141-23-000106.hdr.sgml : 20230623
<ACCEPTANCE-DATETIME>20230623154429
ACCESSION NUMBER:		0001973141-23-000106
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230623
DATE AS OF CHANGE:		20230623

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:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-38295
		FILM NUMBER:		231037505

	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

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DiBiase Mary
		CENTRAL INDEX KEY:			0001880179

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		61 NORTH BEACON STREET, 4TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02134
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001880179</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001501697</issuerCik>
      <issuerName>X4 Pharmaceuticals, Inc</issuerName>
      <secFileNumber>001-38295</secFileNumber>
      <issuerAddress>
        <com:street1>61 NORTH BEACON STREET</com:street1>
        <com:street2>4TH FLOOR</com:street2>
        <com:city>BOSTON</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02134</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>857-529-8300</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>DiBiase Mary</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>UBS Financial Services, Inc.</name>
        <address>
          <com:street1>1000 Harbor Boulevard</com:street1>
          <com:city>Weehawken</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07086</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>857</noOfUnitsSold>
      <aggregateMarketValue>1651.61</aggregateMarketValue>
      <noOfUnitsOutstanding>122207488</noOfUnitsOutstanding>
      <approxSaleDate>06/23/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>06/23/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>857</amountOfSecuritiesAcquired>
      <paymentDate>06/23/2023</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Mary DiBiase</name>
        <address>
          <com:street1>61 NORTH BEACON STREET</com:street1>
          <com:street2>4TH FLOOR</com:street2>
          <com:city>BOSTON</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02134</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <saleDate>06/15/2023</saleDate>
      <amountOfSecuritiesSold>857</amountOfSecuritiesSold>
      <grossProceeds>1911.28</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/23/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>09/29/2022</planAdoptionDate>
      </planAdoptionDates>
      <signature>/s/ UBS Financial Services Inc, as attorney-in-fact for Mary DiBiase</signature>
    </noticeSignature>
  </formData>
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</SEC-DOCUMENT>
