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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."},{"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\"). 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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":"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":12723940,"source":{"system":"sec-edgar","filing":"0001193125-26-085888","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1860059/000119312526085888/ownership.xml","form_type":"4"}},{"id":1780174,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":70813,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VI General Partner LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"On September 13, 2023, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed in-kind to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 2,431,281 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed in-kind to its members, pro rata and without consideration, the 70,813 shares it received from Flagship Fund VI. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"On September 13, 2023, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed in-kind to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 2,431,281 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed in-kind to its members, pro rata and without consideration, the 70,813 shares it received from Flagship Fund VI. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Represents shares held directly by Flagship Fund VI GP. Each of the reporting persons except Flagship Fund VI GP 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":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/doc4.xml","form_type":"4"}},{"id":1780173,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":2431281,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VI, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"On September 13, 2023, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed in-kind to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 2,431,281 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed in-kind to its members, pro rata and without consideration, the 70,813 shares it received from Flagship Fund VI. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"On September 13, 2023, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed in-kind to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 2,431,281 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed in-kind to its members, pro rata and without consideration, the 70,813 shares it received from Flagship Fund VI. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Represents shares held directly by Flagship Fund VI. Flagship Fund VI GP is the general partner of Flagship Fund VI. Flagship Pioneering is the manager of Flagship Fund VI GP. Each of the reporting persons except Flagship Fund VI disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":7293841,"source":{"system":"sec-edgar","filing":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/doc4.xml","form_type":"4"}},{"id":1780172,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":1181745,"ownership":{"direct":false,"nature":"By Flagship Ventures Fund V General Partner LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Represents shares held directly by Flagship Fund V GP. Each of the reporting persons except Flagship Fund V GP 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":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/doc4.xml","form_type":"4"}},{"id":1780171,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":345069,"ownership":{"direct":false,"nature":"By Flagship V VentureLabs Rx Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Flagship Fund V Rx. Flagship V GP is the general partner of Flagship Fund V Rx. Each of the reporting persons except Flagship Fund V Rx disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1035208,"source":{"system":"sec-edgar","filing":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/doc4.xml","form_type":"4"}},{"id":1780170,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":4926378,"ownership":{"direct":false,"nature":"By Flagship Ventures Fund V, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On September 13, 2023, Flagship Ventures Fund V, L.P. (\"Flagship Fund V\") and Flagship V VentureLabs Rx Fund, L.P. (\"Flagship Fund V Rx\") distributed in-kind to their respective limited partners and sole general partner, Flagship Ventures Fund V General Partner, LLC (\"Flagship Fund V GP\"), pro rata and without consideration, 4,926,378 shares and 345,069 shares, respectively, of the Issuer's common stock. Flagship Fund V GP, in turn, distributed in-kind to its members, pro rata and without consideration, the aggregate of 1,181,745 shares it received from Flagship Fund V and Flagship Fund V Rx. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents shares held directly by Flagship Fund V. Includes 2,240,555 shares received in the distribution-in-kind from VentureLabs V described in footnote (1) above. Flagship V GP is the general partner of Flagship Fund V. Dr. Afeyan 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship Fund V. Includes 2,240,555 shares received in the distribution-in-kind from VentureLabs V described in footnote (1) above. Flagship V GP is the general partner of Flagship Fund V. Dr. Afeyan 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":8057470,"source":{"system":"sec-edgar","filing":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/doc4.xml","form_type":"4"}},{"id":1780169,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":2,"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":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":4,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":5,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":6,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63980,"kind":"organization","name":"Flagship Pioneering Fund VI General Partner LLC","position":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-09-15T19:00:16.000Z","date":"2023-09-13","kind":"other","planned":false,"acquired":false,"shares":2825989,"ownership":{"direct":false,"nature":"By Flagship VentureLabs V, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 13, 2023, Flagship VentureLabs V LLC (\"VentureLabs V\") distributed in-kind to its members, pro rata and without consideration, 2,825,989 shares of the Issuer's common stock. The aforementioned distribution was made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On September 13, 2023, Flagship VentureLabs V LLC (\"VentureLabs V\") distributed in-kind to its members, pro rata and without consideration, 2,825,989 shares of the Issuer's common stock. The aforementioned distribution was made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents shares held directly by VentureLabs V. Flagship 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. Dr. Afeyan is the CEO and sole stockholder of Flagship Pioneering. Each of the reporting persons except VentureLabs V disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":8615337,"source":{"system":"sec-edgar","filing":"0000899243-23-019165","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924323019165/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":2869334,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":false,"shares":11585199,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The expiration date is not relevant to the conversion of these securities."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\" and together with Flagship Fund V Rx, Flagship Pioneering VI, and VentureLabs V, the \"Flagship Pioneering Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. 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":11585199},"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869333,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":false,"shares":11441326,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The expiration date is not relevant to the conversion of these securities."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship VentureLabs V LLC. (\"VentureLabs V\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. 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":11441326},"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869332,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":false,"shares":9725122,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The expiration date is not relevant to the conversion of these securities."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. 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":9725122},"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869331,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-2 Convertible Preferred Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":false,"shares":1487371,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The expiration date is not relevant to the conversion of these securities."},{"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":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. 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":1487371},"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869330,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":true,"shares":11585199,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Represents shares held directly by Flagship Ventures Fund V, L.P. (\"Flagship Fund V\" and together with Flagship Fund V Rx, Flagship Pioneering VI, and VentureLabs V, the \"Flagship Pioneering Funds\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":11585199,"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869329,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":true,"shares":11441326,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents shares held directly by Flagship VentureLabs V LLC. (\"VentureLabs V\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":11441326,"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869328,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":true,"shares":9725122,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares held directly by Flagship Pioneering Fund VI, L.P. (\"Flagship Pioneering VI\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":9725122,"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2869327,"issuer":{"id":4870,"kind":"organization","name":"Sana Biotechnology, Inc.","symbol":"SANA"},"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":109677,"kind":"organization","name":"Flagship V VentureLabs Rx Fund, L.P.","position":2,"cik":"0001724939","reported_name":"Flagship V VentureLabs Rx Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":3,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":4,"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":5,"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":6,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109678,"kind":"organization","name":"Flagship VentureLabs V Manager LLC","position":7,"cik":"0001768987","reported_name":"Flagship VentureLabs V Manager LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109679,"kind":"organization","name":"Flagship VentureLabs V LLC","position":8,"cik":"0001724959","reported_name":"Flagship VentureLabs V LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2021-02-10T18:59:46.000Z","date":"2021-02-08","kind":"exercise","acquired":true,"shares":1487371,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The shares of Issuer's Preferred Stock automatically convert into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of 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":"F6","text":"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 Pioneering VI is Flagship Pioneering Fund VI General Partner LLC (\"Flagship Pioneering VI GP\"). The manager of Flagship Pioneering VI GP is Flagship Pioneering. The General Partner of Flagship Fund V and Flagship Fund V Rx is Flagship Ventures Fund V General Partner LLC (\"Flagship V GP\" and, together with VentureLabs V Manager, Flagship Pioneering, and Flagship Pioneering VI GP, the \"Flagship General Partners\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"(continued from footnote 6) Noubar B. Afeyan, Ph.D. is the sole Director of Flagship Pioneering and may be deemed to have sole voting and investment control over all the shares held by VentureLabs V and Flagship Fund VI. In addition, Noubar B. Afeyan, Ph.D. serves as the sole manager of Flagship V GP and may be deemed to possess sole voting and investment control over all the shares held by Flagship Fund V and Flagship Fund V Rx. None of the Flagship General Partners nor Noubar B. Afeyan, Ph.D. directly own any of the shares held by the Flagship Pioneering Funds, and each of the Flagship General Partners and  Noubar Afeyan, Ph.D. disclaims beneficial ownership of such shares except to the extent of its or his pecuniary interest therein."}],"balance_after":1487371,"source":{"system":"sec-edgar","filing":"0000899243-21-005747","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1724939/000089924321005747/doc4.xml","form_type":"4"}},{"id":2966352,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":43154,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"On November 23, 2020, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 1,481,481 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed to its members, pro rata and without consideration, the 43,154 shares it received from Flagship Fund VI. Each of Noubar B. Afeyan, Ph.D. and a trust for the benefit of Dr. Afeyan's children received 12,853 shares through Flagship Fund VI GP's distribution. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Shares held by Flagship Fund VI GP. Flagship Pioneering is the manager of Flagship Fund VI GP. Noubar B. Afeyan Ph.D. is the CEO, sole shareholder and director of Flagship Pioneering. Each of the reporting persons except Flagship Fund VI GP disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}},{"id":2966351,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":1481481,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"On November 23, 2020, Flagship Pioneering Fund VI, L.P. (\"Flagship Fund VI\") distributed to its limited partners and sole general partner, Flagship Pioneering Fund VI General Partner LLC (\"Flagship Fund VI GP\"), pro rata and without consideration, 1,481,481 shares of the Issuer's common stock. Flagship Fund VI GP, in turn, distributed to its members, pro rata and without consideration, the 43,154 shares it received from Flagship Fund VI. Each of Noubar B. Afeyan, Ph.D. and a trust for the benefit of Dr. Afeyan's children received 12,853 shares through Flagship Fund VI GP's distribution. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Shares held by Flagship Fund VI. Flagship Fund VI GP is the general partner of Flagship Fund VI. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Flagship Fund VI GP. Noubar B. Afeyan Ph.D. is the CEO, sole shareholder and director of Flagship Pioneering. Each of the reporting persons except Flagship Fund VI disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":2962963,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}},{"id":2966350,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":1186310,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"On November 23, 2020, Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\") distributed to its limited partners, pro rata and without consideration, 1,186,310 shares of the Issuer's common stock. The aforementioned distribution was made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Shares held by Nutritional LTP. Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\") is the general partner of Nutritional LTP. Noubar B. Afeyan Ph.D. is the sole member and manager of Nutritional LTP GP. Each of the reporting persons except for Nutritional LTP disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":3258134,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}},{"id":2966349,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":966234,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 23, 2020, Flagship Ventures Fund IV, L.P. (\"Flagship Fund IV\") and Flagship Ventures Fund IV-Rx, L.P. (\"Flagship Fund IV-Rx\") distributed to its limited partners and sole general partner, Flagship Ventures Fund IV General Partner, LLC (\"Flagship Fund IV GP\"), pro rata and without consideration, 3,587,820 shares and 642,180 shares, respectively, of the Issuer's common stock. Flagship Fund IV GP, in turn, distributed to its members, pro rata and without consideration, the 837,782 shares and 128,452 shares it received from Flagship Fund IV and Flagship Fund IV-Rx, respectively. Noubar B. Afeyan, Ph.D. received 335,171 shares through Flagship Fund IV GP's distribution. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by Flagship Fund IV GP. Noubar B. Afeyan, Ph.D. is the sole manager of Flagship Fund IV GP. Each of the reporting persons except for Flagship Fund IV GP disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}},{"id":2966348,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":642180,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 23, 2020, Flagship Ventures Fund IV, L.P. (\"Flagship Fund IV\") and Flagship Ventures Fund IV-Rx, L.P. (\"Flagship Fund IV-Rx\") distributed to its limited partners and sole general partner, Flagship Ventures Fund IV General Partner, LLC (\"Flagship Fund IV GP\"), pro rata and without consideration, 3,587,820 shares and 642,180 shares, respectively, of the Issuer's common stock. Flagship Fund IV GP, in turn, distributed to its members, pro rata and without consideration, the 837,782 shares and 128,452 shares it received from Flagship Fund IV and Flagship Fund IV-Rx, respectively. Noubar B. Afeyan, Ph.D. received 335,171 shares through Flagship Fund IV GP's distribution. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by Flagship Fund IV-Rx. Flagship Fund IV GP is the general partner of Flagship Fund IV-Rx. Noubar B. Afeyan, Ph.D. is the sole manager of Flagship Fund IV GP. Each of the reporting persons except for Flagship Fund IV-Rx disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":1283282,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}},{"id":2966347,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":97142,"kind":"organization","name":"Flagship Ventures Fund IV General Partner LLC","position":1,"cik":"0001508051","reported_name":"Flagship Ventures Fund IV General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":111426,"kind":"organization","name":"Flagship Ventures Fund IV, L.P.","position":2,"cik":"0001503559","reported_name":"Flagship Ventures Fund IV, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":126697,"kind":"organization","name":"Flagship Ventures Fund IV-Rx, L.P.","position":3,"cik":"0001590973","reported_name":"Flagship Ventures Fund IV-Rx, 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":4,"cik":"0001780951","reported_name":"Nutritional Health LTP Fund 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":5,"cik":"0001780956","reported_name":"Nutritional Health LTP Fund, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":6,"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":7,"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":8,"cik":"0001716926","reported_name":"Flagship Pioneering Fund VI, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":9,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-25T18:00:45.000Z","date":"2020-11-23","kind":"other","acquired":false,"shares":3587820,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On November 23, 2020, Flagship Ventures Fund IV, L.P. (\"Flagship Fund IV\") and Flagship Ventures Fund IV-Rx, L.P. (\"Flagship Fund IV-Rx\") distributed to its limited partners and sole general partner, Flagship Ventures Fund IV General Partner, LLC (\"Flagship Fund IV GP\"), pro rata and without consideration, 3,587,820 shares and 642,180 shares, respectively, of the Issuer's common stock. Flagship Fund IV GP, in turn, distributed to its members, pro rata and without consideration, the 837,782 shares and 128,452 shares it received from Flagship Fund IV and Flagship Fund IV-Rx, respectively. Noubar B. Afeyan, Ph.D. received 335,171 shares through Flagship Fund IV GP's distribution. The aforementioned distributions were made in accordance with the exemptions afforded by Rule 16a-13 and Rule 16a-9 of the Securities Exchange Act of 1934, as amended."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by Flagship Fund IV. Flagship Fund IV GP is the general partner of Flagship Fund IV. Noubar B. Afeyan, Ph.D. is the sole manager of Flagship Fund IV GP. Each of the reporting persons except for Flagship Fund IV disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein. Edwin M. Kania, Jr. is retired both from Flagship Pioneering and as a manager of Flagship Fund IV GP."}],"balance_after":4434600,"source":{"system":"sec-edgar","filing":"0000899243-20-032200","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1780951/000089924320032200/doc4.xml","form_type":"4"}}]}