0000950123-19-003896.txt : 20190503 0000950123-19-003896.hdr.sgml : 20190503 20190503162249 ACCESSION NUMBER: 0000950123-19-003896 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20190331 FILED AS OF DATE: 20190503 DATE AS OF CHANGE: 20190503 EFFECTIVENESS DATE: 20190503 FILER: COMPANY DATA: COMPANY CONFORMED NAME: TRV GP IV, LLC CENTRAL INDEX KEY: 0001688325 IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-18982 FILM NUMBER: 19796510 BUSINESS ADDRESS: STREET 1: 29 NEWBURY STREET, 3RD FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 617-585-2000 MAIL ADDRESS: STREET 1: 29 NEWBURY STREET, 3RD FLOOR CITY: BOSTON STATE: MA ZIP: 02116 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001688325 XXXXXXXX 03-31-2019 03-31-2019 TRV GP IV, LLC

29 Newbury Street, 3rd Floor Boston MA 02116

13F HOLDINGS REPORT 028-18982 N Kevin Gillis 617-585-2000 /s/ Kevin Gillis Boston MA 05-03-2019 0 1 131895 false INFORMATION TABLE 2 form13fInfoTable.xml INFORMATION TABLE FOR FORM 13F MAGENTA THERAPEUTICS, INC. COM 55910K108 131895 8008204 SH SOLE 8008204 0 0