0000950123-22-002902.txt : 20220214 0000950123-22-002902.hdr.sgml : 20220214 20220214150114 ACCESSION NUMBER: 0000950123-22-002902 CONFORMED SUBMISSION TYPE: 13F-NT PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20211231 FILED AS OF DATE: 20220214 DATE AS OF CHANGE: 20220214 EFFECTIVENESS DATE: 20220214 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Flagship Pioneering Special Opportunities Fund II General Partner LLC CENTRAL INDEX KEY: 0001826217 IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-NT SEC ACT: 1934 Act SEC FILE NUMBER: 028-20997 FILM NUMBER: 22630082 BUSINESS ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY STREET 2: 8TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 617-868-1888 MAIL ADDRESS: STREET 1: 55 CAMBRIDGE PARKWAY STREET 2: 8TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 13F-NT 1 primary_doc.xml 13F-NT LIVE 0001826217 XXXXXXXX 12-31-2021 12-31-2021 false Flagship Pioneering Special Opportunities Fund II General Partner LLC

55 Cambridge Parkway 8th Floor Cambridge MA 02142

13F NOTICE 028-20997 028-17559 Flagship Pioneering Inc. N Noubar B. Afeyan, Ph.D. 617-868-1888 /s/ Noubar B. Afeyan, Ph.D. Cambridge MA 02-14-2022