0001973141-23-000105.txt : 20230623 0001973141-23-000105.hdr.sgml : 20230623 20230623152922 ACCESSION NUMBER: 0001973141-23-000105 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: 231037449 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: Ragan Paula CENTRAL INDEX KEY: 0001769914 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O X4 PHARMACEUTICALS, INC. STREET 2: 955 MASSACHUSETTS AVE., 4TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 144 1 primary_doc.xml 144 0001769914 XXXXXXXX LIVE 0001501697 X4 Pharmaceuticals, Inc 001-38295 61 NORTH BEACON STREET 4TH FLOOR BOSTON MA 02134 857-529-8300 Ragan Paula Officer Common UBS Financial Services, Inc.

1000 Harbor Boulevard Weehawken NJ 07086

6724 12930.00 122207488 06/23/2023 NASDAQ Common 06/23/2023 Stock Award Issuer N 6724 06/23/2023 N/A N Paula Ragan

61 North Beacon Street 4th Floor Boston MA 02134

Common 05/31/2023 6292 12275.00 Paula Ragan

61 North Beacon Street 4th Floor Boston MA 02134

Common 06/15/2023 6724 14981.00 06/23/2023 09/29/2022 /s/ UBS Financial Services Inc, as attorney-in-fact for Paula Ragan