{"transactions":[{"id":875738,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":2109704,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By FPN II, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Securities held by FPN II, L.P. (\"FPN II Fund\"). FPN General Partner LLC (\"FPN GP\") is the general partner of FPN II Fund. Flagship Pioneering is the manager of FPN GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1388876},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875737,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":1265822,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Securities held by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\"). Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering is the manager of Flagship Opportunities Fund II GP. 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(\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Securities held by Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\"). Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering is the manager of Flagship Fund VII GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1666651},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875735,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":2109704,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By FPN II, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Securities held by FPN II, L.P. (\"FPN II Fund\"). FPN General Partner LLC (\"FPN GP\") is the general partner of FPN II Fund. Flagship Pioneering is the manager of FPN GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1388876},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875734,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":2953586,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Securities held by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\"). Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering is the manager of Flagship Opportunities Fund II GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1944427},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875733,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":1265822,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Securities held by Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\"). Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering is the manager of Flagship Fund VII GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":833325},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875732,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":843881,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VI, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Each share of Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into shares of the Issuer's Common Stock on a one-for-1.5190 basis upon the closing of the Issuer's initial public offering on March 2, 2026. The Preferred Stock had no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":555550},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875731,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":1500000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Nutritional Health LTP Fund, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Securities held by Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\"). Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\") is the general partner of Nutritional LTP. Flagship Pioneering is the manager of Nutritional LTP GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":987491},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875730,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":17016215,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Securities held by Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\"). Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering is the manager of Flagship Fund VII GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":11202248},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875729,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Preferred Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":18483785,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VI, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\"). Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\") is the general partner of Flagship Fund VI. Flagship Pioneering, LLC (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Each share of Series A Preferred Stock, Series B Preferred Stock and Series C Preferred Stock (collectively, the \"Preferred Stock\") automatically converted into shares of the Issuer's Common Stock on a one-for-1.5190 basis upon the closing of the Issuer's initial public offering on March 2, 2026. The Preferred Stock had no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":12168390},"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875728,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI 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L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"purchase","planned":false,"acquired":true,"shares":1562500,"price":16,"value":25000000.0,"ownership":{"direct":false,"nature":"By Pioneering Medicines 02, LLC"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Securities held by Pioneering Medicine 02, LLC (\"PM02\"). Charles R. Carelli, Jr., Chief Financial Officer of Flagship Pioneering, is the sole manager of PM02, and Flagship Fund VII is its majority equity holder. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1562500,"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875726,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"purchase","planned":false,"acquired":true,"shares":1562500,"price":16,"value":25000000.0,"ownership":{"direct":false,"nature":"By FPN II, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Securities held by FPN II, L.P. (\"FPN II Fund\"). FPN General Partner LLC (\"FPN GP\") is the general partner of FPN II Fund. Flagship Pioneering is the manager of FPN GP. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":4340252,"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875725,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"purchase","planned":false,"acquired":true,"shares":1562500,"price":16,"value":25000000.0,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Securities held by Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\"). Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering is the manager of Flagship Fund VII GP. 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Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":2777752,"source":{"system":"sec-edgar","filing":"0001193125-26-085855","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526085855/ownership.xml","form_type":"4"}},{"id":875723,"issuer":{"id":1553,"kind":"organization","name":"Generate Biomedicines, Inc.","symbol":"GENB"},"owners":[{"id":44731,"kind":"person","name":"Afeyan Noubar","position":1,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64110,"kind":"organization","name":"Flagship VentureLabs VI LLC","position":2,"cik":"0001725008","reported_name":"Flagship VentureLabs VI LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":4,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":6,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64115,"kind":"organization","name":"FPN II, L.P.","position":7,"cik":"0001918834","reported_name":"FPN II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-03-02T17:42:42.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":true,"shares":2777752,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Securities held by Flagship Pioneering Fund VI, L.P. 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Subject to certain exclusions, if prior to June 30, 2027, the Company issues capital stock or securities convertible into or exercisable for capital stock in one or more related transactions primarily for capital raising at a weighted-average common stock equivalent price (the \"Weighted-Average Price\") below $13.42 per share, the exercise price of a Series Warrant shall reset upon exercise to the midpoint between the initial price and the lowest such Weighted-Average Price, but not below $6.71 per share. The exercise price may be adjusted only once pursuant to this mechanism."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired warrants to purchase an aggregate of 4,470,936 shares of Common Stock, consisting of (i) Pre-Funded Warrants to purchase 2,235,468 shares of Common Stock, (ii) Series 1 Warrants to purchase 1,117,734 shares of Common Stock and (iii) Series 2 Warrants to purchase 1,117,734 shares of Common Stock (together with the Series 1 Warrants, the \"Series Warrants\"). The securities were acquired for a purchase price of $6.7099 per Pre-Funded Warrant and accompanying Series Warrants."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Securities held by Flagship Fund VII. Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering, LLC (f/k/a Flagship Pioneering, Inc., \"Flagship Pioneering\") is the manager of Flagship Fund VII GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1117734,"derivative":{"exercise_price":20.13,"exercise_date":"2026-01-13","expiration_date":"2030-12-31","underlying":"Common Stock","underlying_shares":1117734},"source":{"system":"sec-edgar","filing":"0001193125-26-014218","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526014218/ownership.xml","form_type":"4"}},{"id":938820,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":2,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":3,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":5,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":6,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":7,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69365,"kind":"person","name":"Flagship Ventures Opportunities Fund I General Partner LLC","position":8,"cik":"0001725004","reported_name":"Flagship Ventures Opportunities Fund I General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69366,"kind":"person","name":"Flagship Ventures Opportunities Fund I, L.P.","position":9,"cik":"0001677345","reported_name":"Flagship Ventures Opportunities Fund I, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series 1 Warrants to purchase Common Stock","published_at":"2026-01-15T17:00:05.000Z","date":"2026-01-13","kind":"grant","planned":false,"acquired":true,"shares":1117734,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The Series Warrants are exercisable at an initial price of $13.42 per Series 1 Warrant and $20.13 per Series 2 Warrant. Subject to certain exclusions, if prior to June 30, 2027, the Company issues capital stock or securities convertible into or exercisable for capital stock in one or more related transactions primarily for capital raising at a weighted-average common stock equivalent price (the \"Weighted-Average Price\") below $13.42 per share, the exercise price of a Series Warrant shall reset upon exercise to the midpoint between the initial price and the lowest such Weighted-Average Price, but not below $6.71 per share. The exercise price may be adjusted only once pursuant to this mechanism."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired warrants to purchase an aggregate of 4,470,936 shares of Common Stock, consisting of (i) Pre-Funded Warrants to purchase 2,235,468 shares of Common Stock, (ii) Series 1 Warrants to purchase 1,117,734 shares of Common Stock and (iii) Series 2 Warrants to purchase 1,117,734 shares of Common Stock (together with the Series 1 Warrants, the \"Series Warrants\"). The securities were acquired for a purchase price of $6.7099 per Pre-Funded Warrant and accompanying Series Warrants."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Securities held by Flagship Fund VII. Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering, LLC (f/k/a Flagship Pioneering, Inc., \"Flagship Pioneering\") is the manager of Flagship Fund VII GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1117734,"derivative":{"exercise_price":13.42,"exercise_date":"2026-01-13","expiration_date":"2027-06-30","underlying":"Common Stock","underlying_shares":1117734},"source":{"system":"sec-edgar","filing":"0001193125-26-014218","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526014218/ownership.xml","form_type":"4"}},{"id":938819,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":2,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":3,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":5,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":6,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":7,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69365,"kind":"person","name":"Flagship Ventures Opportunities Fund I General Partner LLC","position":8,"cik":"0001725004","reported_name":"Flagship Ventures Opportunities Fund I General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69366,"kind":"person","name":"Flagship Ventures Opportunities Fund I, L.P.","position":9,"cik":"0001677345","reported_name":"Flagship Ventures Opportunities Fund I, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrants to purchase Common Stock","published_at":"2026-01-15T17:00:05.000Z","date":"2026-01-13","kind":"grant","planned":false,"acquired":true,"shares":2235468,"price":6.7099,"value":14999766.7332,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired warrants to purchase an aggregate of 4,470,936 shares of Common Stock, consisting of (i) Pre-Funded Warrants to purchase 2,235,468 shares of Common Stock, (ii) Series 1 Warrants to purchase 1,117,734 shares of Common Stock and (iii) Series 2 Warrants to purchase 1,117,734 shares of Common Stock (together with the Series 1 Warrants, the \"Series Warrants\"). The securities were acquired for a purchase price of $6.7099 per Pre-Funded Warrant and accompanying Series Warrants."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Securities held by Flagship Fund VII. Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering, LLC (f/k/a Flagship Pioneering, Inc., \"Flagship Pioneering\") is the manager of Flagship Fund VII GP. Noubar B. Afeyan, Ph.D. is the ultimate control person of Flagship Pioneering. Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":2235468,"derivative":{"exercise_price":0.0001,"exercise_date":"2026-01-13","expiration_date":"2046-01-13","underlying":"Common Stock","underlying_shares":2235468},"source":{"system":"sec-edgar","filing":"0001193125-26-014218","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526014218/ownership.xml","form_type":"4"}},{"id":1501738,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":2,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":4,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrants to purchase Common Stock","published_at":"2024-05-24T21:05:08.000Z","date":"2024-05-22","kind":"purchase","planned":false,"acquired":true,"shares":1814915,"price":5.5099,"value":10000000.1585,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Securities held by Flagship Fund VII. Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Flagship Fund VII GP. Each of the reporting persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1814915,"derivative":{"exercise_price":0.0001,"underlying":"Common Stock","underlying_shares":1814915},"source":{"system":"sec-edgar","filing":"0000950170-24-064713","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1222012/000095017024064713/ownership.xml","form_type":"4"}},{"id":1501737,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":2,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":4,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrants to purchase Common Stock","published_at":"2024-05-24T21:05:08.000Z","date":"2024-05-22","kind":"purchase","planned":false,"acquired":true,"shares":1814914,"price":5.5099,"value":9999994.6486,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On May 22, 2024, pursuant to an underwritten public offering by the Issuer, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired pre-funded warrants (the \"Pre-Funded Warrants\") to purchase 1,814,914 and 1,814,915 shares of Common Stock, respectively, at a purchase price of $5.5099 per Pre-Funded Warrant. The Pre-Funded Warrants are immediately exercisable and do not have an expiration date; however, a holder of Pre-Funded Warrants may not exercise the Pre-Funded Warrant if the holder, together with its affiliates, would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Securities held by Flagship Opportunities Fund II. Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Flagship Opportunities Fund II GP. Noubar B. Afeyan, Ph.D. is the CEO and sole stockholder of Flagship Pioneering. Each of the reporting persons except Flagship Opportunities Fund II disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1814914,"derivative":{"exercise_price":0.0001,"underlying":"Common Stock","underlying_shares":1814914},"source":{"system":"sec-edgar","filing":"0000950170-24-064713","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1222012/000095017024064713/ownership.xml","form_type":"4"}},{"id":1807324,"issuer":{"id":11481,"kind":"organization","name":"Sigilon Therapeutics, Inc.","symbol":"SGTX"},"owners":[{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":1,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":2,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":6,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-08-15T16:15:09.000Z","date":"2023-08-11","kind":"other","planned":false,"acquired":false,"shares":113960,"price":14.92,"value":1700283.2,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger by and among the Issuer, Eli Lilly and Company and Shenandoah Acquisition Corporation, dated as of June 28, 2023, these shares were tendered in exchange for (a) $14.92 per share and (b) one contingent value right per Share (each, a \"CVR\"), which represents the contractual right to receive up to three contingent payments for an aggregate of up to $111.64 per CVR, without interest and less any applicable tax withholding, upon the achievement of certain specified milestones."},{"field":"shares","element":"transactionShares","label":"F2","text":"Effective May 22, 2023, the Issuer effected a 1-for-13 reverse stock split (the \"Reverse Split\") of its issued and outstanding shares of Common Stock. Cash was paid in lieu of any fractional shares resulting from the Reverse Split. The share amounts in this Form 4 have been adjusted for the Reverse Split."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger by and among the Issuer, Eli Lilly and Company and Shenandoah Acquisition Corporation, dated as of June 28, 2023, these shares were tendered in exchange for (a) $14.92 per share and (b) one contingent value right per Share (each, a \"CVR\"), which represents the contractual right to receive up to three contingent payments for an aggregate of up to $111.64 per CVR, without interest and less any applicable tax withholding, upon the achievement of certain specified milestones."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\"). Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Flagship Opportunities Fund II GP. Noubar B. Afeyan, Ph.D. is the CEO and sole stockholder of Flagship Pioneering. Each of the reporting persons except Flagship Opportunities Fund II disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-23-018154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1627639/000089924323018154/doc4.xml","form_type":"4"}},{"id":1807323,"issuer":{"id":11481,"kind":"organization","name":"Sigilon Therapeutics, Inc.","symbol":"SGTX"},"owners":[{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":1,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":2,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":6,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-08-15T16:15:09.000Z","date":"2023-08-11","kind":"other","planned":false,"acquired":false,"shares":683760,"price":14.92,"value":10201699.2,"ownership":{"direct":false,"nature":"By Flagship Ventures Fund V, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger by and among the Issuer, Eli Lilly and Company and Shenandoah Acquisition Corporation, dated as of June 28, 2023, these shares were tendered in exchange for (a) $14.92 per share and (b) one contingent value right per Share (each, a \"CVR\"), which represents the contractual right to receive up to three contingent payments for an aggregate of up to $111.64 per CVR, without interest and less any applicable tax withholding, upon the achievement of certain specified milestones."},{"field":"shares","element":"transactionShares","label":"F2","text":"Effective May 22, 2023, the Issuer effected a 1-for-13 reverse stock split (the \"Reverse Split\") of its issued and outstanding shares of Common Stock. Cash was paid in lieu of any fractional shares resulting from the Reverse Split. The share amounts in this Form 4 have been adjusted for the Reverse Split."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the terms of that certain Agreement and Plan of Merger by and among the Issuer, Eli Lilly and Company and Shenandoah Acquisition Corporation, dated as of June 28, 2023, these shares were tendered in exchange for (a) $14.92 per share and (b) one contingent value right per Share (each, a \"CVR\"), which represents the contractual right to receive up to three contingent payments for an aggregate of up to $111.64 per CVR, without interest and less any applicable tax withholding, upon the achievement of certain specified milestones."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\"). Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\") is the general partner of Flagship Fund V. Noubar B. Afeyan, Ph.D. is the sole manager of Flagship V GP. Each of the reporting persons except Flagship Fund V disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-23-018154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1627639/000089924323018154/doc4.xml","form_type":"4"}},{"id":1990606,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":2,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":4,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-02-27T17:20:26.000Z","date":"2023-02-27","kind":"purchase","acquired":true,"shares":1329324,"price":5.78,"value":7683492.72,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 27, 2023, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") purchased 1,993,986 shares and 1,329,324 shares, respectively, of the Issuer's Common Stock in a registered direct offering at a price of $5.78 per share pursuant to a Securities Purchase Agreement dated February 22, 2023."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Fund VII. Flagship Pioneering Fund VII General Partner LLC (\"Flagship Fund VII GP\") is the general partner of Flagship Fund VII. Flagship Pioneering is the manager of Flagship Fund VII GP. Each of the reporting persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1329324,"source":{"system":"sec-edgar","filing":"0000899243-23-006241","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1850838/000089924323006241/doc4.xml","form_type":"4"}},{"id":1990605,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":2,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":4,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-02-27T17:20:26.000Z","date":"2023-02-27","kind":"purchase","acquired":true,"shares":1993986,"price":5.78,"value":11525239.08,"ownership":{"direct":false,"nature":"By Flagship Pioneering Special Opportunities Fund II, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 27, 2023, Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") purchased 1,993,986 shares and 1,329,324 shares, respectively, of the Issuer's Common Stock in a registered direct offering at a price of $5.78 per share pursuant to a Securities Purchase Agreement dated February 22, 2023."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held directly by Flagship Opportunities Fund II. Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Flagship Opportunities Fund II GP. Noubar B. Afeyan, Ph.D. is the Chief Executive Officer, sole shareholder and director of Flagship Pioneering. Each of the reporting persons except Flagship Opportunities Fund II disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":7508693,"source":{"system":"sec-edgar","filing":"0000899243-23-006241","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1850838/000089924323006241/doc4.xml","form_type":"4"}},{"id":2613233,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":1666666,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Represents shares held directly by FPN, L.P. (\"FPN Fund\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":441176},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":21,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613232,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":5000000,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares held directly by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\")"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1323530},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613231,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":1666667,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":441176},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613230,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":3333333,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Represents shares held directly by FPN, L.P. (\"FPN Fund\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":882353},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613229,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":13333333,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares held directly by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\")"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3529413},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613228,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":666667,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":176470},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613227,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":2666667,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":705882},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613226,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":3000000,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":794118},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613225,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":27388000,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":7249767},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613224,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":22275232,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":5896386},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613223,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A Convertible Preferred Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":false,"shares":4112000,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held directly by Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1088470},"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613222,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"purchase","acquired":true,"shares":294117,"price":17,"value":4999989.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Represents shares held directly by FPN, L.P. (\"FPN Fund\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":1617646,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613221,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":1323529,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"Represents shares held directly by FPN, L.P. (\"FPN Fund\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":1323529,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613220,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"purchase","acquired":true,"shares":661764,"price":17,"value":11249988.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares held directly by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\")"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":5514707,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613219,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":4852943,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares held directly by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\")"},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":4852943,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613218,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":970588,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":970588,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613217,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"purchase","acquired":true,"shares":220588,"price":17,"value":3749996.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":8617413,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613216,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":8396825,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":8396825,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613215,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":5896386,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":5896386,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2613214,"issuer":{"id":83618,"kind":"organization","name":"Omega Therapeutics, Inc.","symbol":"OMGA"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":2,"cik":"0001724957","reported_name":"Flagship Pioneering Fund VI General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64111,"kind":"organization","name":"Flagship Pioneering Fund VI, L.P.","position":3,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":4,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":5,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64113,"kind":"organization","name":"Nutritional Health LTP Fund, L.P.","position":6,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":7,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63984,"kind":"organization","name":"FPN General Partner LLC","position":8,"cik":"0001860059","reported_name":"FPN General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":136592,"kind":"organization","name":"FPN, L.P.","position":9,"cik":"0001860062","reported_name":"FPN, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T17:41:01.000Z","date":"2021-08-03","kind":"exercise","acquired":true,"shares":1088470,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's preferred stock have no expiration date and are convertible at the holder's election into Issuer's common stock at a conversion ratio of 1-to-0.264706. The preferred stock will automatically convert into shares of the Issuer's common stock, for no additional consideration, upon the closing of the Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held directly by Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Flagship Fund V is a member of VentureLabs V. VentureLabs V Manager LLC (\"VentureLabs V Manager\") is the manager of VentureLabs V. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of VentureLabs V Manager. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\"). The General Partner of Flagship Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The General Partner of Flagship Opportunities Fund II is Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Flagship Opportunities Fund II GP\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F10","text":"(continued from above) The general partner of FPN Fund is FPN General Partner LLC (\"FPN GP\"). The manager of Flagship Pioneering VI GP, Flagship Opportunities Fund II GP, and FPN GP is Flagship Pioneering. The general partner of Nutritional LTP is Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\" and, together with VentureLabs V Manager, Flagship Pioneering, Flagship V GP, Flagship Pioneering VI GP, Flagship Opportunities Fund II GP and FPN GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F11","text":"(continued from above)  Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") is the sole director of Flagship Pioneering and may be deemed to have beneficial ownership of all the shares held by VentureLabs V, Flagship Pioneering VI, Flagship Opportunities Fund II and FPN Fund. In addition, Dr. Afeyan serves as the sole manager of Flagship V GP and is the sole member and manager of Nutritional LTP GP and may be deemed to have beneficial ownership of all the shares held by Flagship Fund V, Flagship Fund V Rx and Nutritional LTP. None of the Flagship General Partners nor Dr. Afeyan directly own any of the shares held by the Reporting Persons, and each of the Flagship General Partners and Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":1088470,"source":{"system":"sec-edgar","filing":"0000899243-21-031796","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1860062/000089924321031796/doc4.xml","form_type":"4"}},{"id":2950165,"issuer":{"id":11481,"kind":"organization","name":"Sigilon Therapeutics, Inc.","symbol":"SGTX"},"owners":[{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":1,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":2,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":6,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B Convertible Preferred Stock","published_at":"2020-12-10T18:19:11.000Z","date":"2020-12-08","kind":"exercise","acquired":false,"shares":1481481,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by Flagship Pioneering Special Opportunities Fund II, L.P. (\"Flagship Opportunities Fund II\"). Flagship Pioneering Special Opportunities Fund II General Partner LLC (\"Opportunities Fund II GP\") is the general partner of Flagship Opportunities Fund II. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Opportunities Fund II GP. Noubar B. Afeyan, Ph.D. is sole director of Flagship Pioneering. Each of Noubar B. 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There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\"). Flagship Ventures Fund V General Partner LLC (\"Fund V GP\") is the general partner of Flagship Fund V. Noubar B. Afeyan Ph.D. serves as the sole manager of Fund V GP. Each of Fund V GP and Noubar B. Afeyan Ph.D. disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":370370},"source":{"system":"sec-edgar","filing":"0001104659-20-134302","document":"tm2037869-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1627639/000110465920134302/tm2037869-3_4seq1.xml","form_type":"4"}},{"id":2950163,"issuer":{"id":11481,"kind":"organization","name":"Sigilon Therapeutics, Inc.","symbol":"SGTX"},"owners":[{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":1,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":2,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":3,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":6,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Stock","published_at":"2020-12-10T18:19:11.000Z","date":"2020-12-08","kind":"exercise","acquired":false,"shares":4074074,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. There was no expiration date for the Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock or Series B Convertible Preferred Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Upon closing of the Registrant's initial public offering, each share of Series A Convertible Preferred Stock, Series A-1 Convertible Preferred Stock and Series B Convertible Preferred Stock automatically converted into shares of Common Stock without payment or further consideration. 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