0001628280-22-002507.txt : 20220214 0001628280-22-002507.hdr.sgml : 20220214 20220214162114 ACCESSION NUMBER: 0001628280-22-002507 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20220211 FILED AS OF DATE: 20220214 DATE AS OF CHANGE: 20220214 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Taveras Arthur CENTRAL INDEX KEY: 0001830901 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38295 FILM NUMBER: 22632489 MAIL ADDRESS: STREET 1: C/O X4 PHARMACEUTICALS, INC. STREET 2: 61 NORTH BEACON STREET, 4TH FLOOR CITY: BOSTON STATE: MA ZIP: 02134 ISSUER: 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 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 4 1 wf-form4_164487363627920.xml FORM 4 X0306 4 2022-02-11 0 0001501697 X4 Pharmaceuticals, Inc XFOR 0001830901 Taveras Arthur C/O X4 PHARMACEUTICALS INC. 61 NORTH BEACON STREET 4TH FLOOR BOSTON MA 02134 0 1 0 0 Chief Scientific Officer Common Stock 2022-02-11 4 F 0 928 0 D 7107 D The reported transaction was effected pursuant to a Rule 10b5-1 trading plan. Shares withheld by X4 Pharmaceuticals Inc. to satisfy taxes payable in connection with the vesting of previously awarded restricted stock units. Of the shares of common stock reported, 5,357 shares represent unvested restricted stock units. Derek M. Meisner, attorney-in-fact 2022-02-14