0001628280-23-031389.txt : 20230905 0001628280-23-031389.hdr.sgml : 20230905 20230905161536 ACCESSION NUMBER: 0001628280-23-031389 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230831 FILED AS OF DATE: 20230905 DATE AS OF CHANGE: 20230905 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Arbet-Engels Christophe CENTRAL INDEX KEY: 0001802615 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38295 FILM NUMBER: 231235938 MAIL ADDRESS: STREET 1: C/O MILLENDO THERAPEUTICS, INC. STREET 2: 110 MILLER AVENUE, SUITE 100 CITY: ANN ARBOR STATE: MI ZIP: 48104 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 wk-form4_1693944923.xml FORM 4 X0508 4 2023-08-31 0 0001501697 X4 Pharmaceuticals, Inc XFOR 0001802615 Arbet-Engels Christophe C/O X4 PHARMACEUTICALS INC. 61 NORTH BEACON STREET 4TH FLOOR BOSTON MA 02134 0 1 0 0 Chief Medical Officer 0 Stock Option (right to buy) 1.28 2023-08-31 4 A 0 1250000 1.28 A 2033-08-30 Common Stock 1250000 1250000 D 25% of the shares subject to the option shall vest on August 31, 2024, with the remainder vesting in equal installments of 2.0833% of the shares subject to the option each successive month thereafter for a period of 36 months, subject to the Reporting Person continuing to provide services through each such date. /s/ Adam S. Mostafa, attorney-in-fact 2023-09-05