0001012975-17-000377.txt : 20170510 0001012975-17-000377.hdr.sgml : 20170510 20170510162817 ACCESSION NUMBER: 0001012975-17-000377 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20170331 FILED AS OF DATE: 20170510 DATE AS OF CHANGE: 20170510 EFFECTIVENESS DATE: 20170510 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Flagship Pioneering Inc. CENTRAL INDEX KEY: 0001400240 IRS NUMBER: 752992246 STATE OF INCORPORATION: DE FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-17559 FILM NUMBER: 17830703 BUSINESS ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY, SUITE 800E CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 617 868-1888 MAIL ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY, SUITE 800E CITY: CAMBRIDGE STATE: MA ZIP: 02142 FORMER COMPANY: FORMER CONFORMED NAME: Flagship Ventures Management, Inc. DATE OF NAME CHANGE: 20070522 13F-HR 1 primary_doc.xml 13F-HR LIVE false false false 0001400240 XXXXXXXX 03-31-2017 03-31-2017 Flagship Pioneering Inc.

55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142

13F HOLDINGS REPORT 028-17559 N Noubar B. Afeyan, Ph.D. 617-868-1888 /s/ Noubar B. Afeyan, Ph.D. Cambridge MA 05-10-2017 2 9 376254 false 1 0001508053 028-15778 Flagship Ventures 2007 General Partner LLC 2 0001508051 028-17238 Flagship Ventures Fund IV General Partner LLC INFORMATION TABLE 2 infotable.xml INFORMATION TABLE AGIOS PHARMACEUTICALS INC COM 00847X104 56378 965369 SH DFND 1 0 965369 0 ELEVEN BIOTHERAPEUTICS INC COM 286221106 2268 1030884 SH DFND 1 0 1030884 0 ELEVEN BIOTHERAPEUTICS INC COM 286221106 645 293134 SH DFND 2 0 293134 0 T2 BIOSYSTEMS INC COM 89853L104 8589 1632816 SH DFND 0 1632816 0 T2 BIOSYSTEMS INC COM 89853L104 1671 317767 SH DFND 2 0 317767 0 SERES THERAPEUTICS INC COM 81750R102 142936 12682876 SH DFND 2 0 12682876 0 EDITAS MEDICINE INC COM 28106W103 75356 3376184 SH DFND 2 0 3376184 0 SYROS PHARMACEUTICALS INC COM 87184Q107 76570 4806656 SH DFND 2 0 4806656 0 SELECTA BIOSCIENCES INC COM 816212104 11841 826862 SH DFND 1 0 826862 0