<SEC-DOCUMENT>0000921895-19-001144-index.html : 20190423 <SEC-HEADER>0000921895-19-001144.hdr.sgml : 20190423 <ACCEPTANCE-DATETIME>20190423092725 ACCESSION NUMBER: 0000921895-19-001144 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20190423 DATE AS OF CHANGE: 20190423 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: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-90199 FILM NUMBER: 19760762 BUSINESS ADDRESS: STREET 1: 955 MASSACHUSETTS AVENUE STREET 2: 4TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-529-8300 MAIL ADDRESS: STREET 1: 955 MASSACHUSETTS AVENUE STREET 2: 4TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 FORMER COMPANY: FORMER CONFORMED NAME: Arsanis, Inc. DATE OF NAME CHANGE: 20100920 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: BIOTECHNOLOGY VALUE FUND L P CENTRAL INDEX KEY: 0000918923 STANDARD INDUSTRIAL CLASSIFICATION: INVESTMENT ADVICE [6282] IRS NUMBER: 363924731 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 44 MONTGOMERY STREET STREET 2: 40TH FL CITY: SAN FRANCISCO STATE: CA ZIP: 94104 BUSINESS PHONE: 3125066500 MAIL ADDRESS: STREET 1: 44 MONTGOMERY STREET STREET 2: 40TH FL CITY: SAN FRANCISCO STATE: CA ZIP: 94104 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>sc13g07422010_04222019.htm <DESCRIPTION>THE SCHEDULE 13G <TEXT> Document 1 - file: sc13g07422010_04222019.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>ex991to13g07422010_04222019.htm <DESCRIPTION>JOINT FILING AGREEMENT <TEXT> Document 2 - file: ex991to13g07422010_04222019.htm
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