0001973141-23-000106.txt : 20230623 0001973141-23-000106.hdr.sgml : 20230623 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 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 Boulevard Weehawken NJ 07086

857 1651.61 122207488 06/23/2023 NASDAQ Common 06/23/2023 Stock Award Issuer N 857 06/23/2023 N/A N Mary DiBiase

61 NORTH BEACON STREET 4TH FLOOR BOSTON MA 02134

Common 06/15/2023 857 1911.28 06/23/2023 09/29/2022 /s/ UBS Financial Services Inc, as attorney-in-fact for Mary DiBiase