0001973141-24-000103.txt : 20240212 0001973141-24-000103.hdr.sgml : 20240212 20240212160653 ACCESSION NUMBER: 0001973141-24-000103 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240212 DATE AS OF CHANGE: 20240212 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: X4 Pharmaceuticals, Inc CENTRAL INDEX KEY: 0001501697 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] ORGANIZATION NAME: 03 Life Sciences 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: 24619908 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 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 61 NORTH BEACON STREET, 4TH FLOOR CITY: BOSTON STATE: MA ZIP: 02134 144 1 primary_doc.xml 144 0001880179 XXXXXXXX LIVE 0001501697 X4 Pharmaceuticals, Inc 001-38295 61 NORTH BEACON STREET 4TH FLOOR BOSTON MA 02134 857-529-8300 DiBiase Mary Officer Common UBS Financial Services, Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

3683 3572.51 167291209 02/12/2024 Nasdaq Common 02/12/2024 RSU Issuer N 3683 02/12/2024 NA Y 02/12/2024 06/02/2023 /s/ UBS Financial Services Inc, as attorney-in-fact for Mary DiBiase