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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. 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Subject to certain exclusions, if prior to June 30, 2027, the Company issues capital stock or securities convertible into or exercisable for capital stock in one or more related transactions primarily for capital raising at a weighted-average common stock equivalent price (the \"Weighted-Average Price\") below $13.42 per share, the exercise price of a Series Warrant shall reset upon exercise to the midpoint between the initial price and the lowest such Weighted-Average Price, but not below $6.71 per share. The exercise price may be adjusted only once pursuant to this mechanism."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. 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Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1117734,"derivative":{"exercise_price":20.13,"exercise_date":"2026-01-13","expiration_date":"2030-12-31","underlying":"Common Stock","underlying_shares":1117734},"source":{"system":"sec-edgar","filing":"0001193125-26-014218","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526014218/ownership.xml","form_type":"4"}},{"id":938820,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":2,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":3,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":5,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":6,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":7,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69365,"kind":"person","name":"Flagship Ventures Opportunities Fund I General Partner LLC","position":8,"cik":"0001725004","reported_name":"Flagship Ventures Opportunities Fund I General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69366,"kind":"person","name":"Flagship Ventures Opportunities Fund I, L.P.","position":9,"cik":"0001677345","reported_name":"Flagship Ventures Opportunities Fund I, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series 1 Warrants to purchase Common Stock","published_at":"2026-01-15T17:00:05.000Z","date":"2026-01-13","kind":"grant","planned":false,"acquired":true,"shares":1117734,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The Series Warrants are exercisable at an initial price of $13.42 per Series 1 Warrant and $20.13 per Series 2 Warrant. Subject to certain exclusions, if prior to June 30, 2027, the Company issues capital stock or securities convertible into or exercisable for capital stock in one or more related transactions primarily for capital raising at a weighted-average common stock equivalent price (the \"Weighted-Average Price\") below $13.42 per share, the exercise price of a Series Warrant shall reset upon exercise to the midpoint between the initial price and the lowest such Weighted-Average Price, but not below $6.71 per share. The exercise price may be adjusted only once pursuant to this mechanism."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. 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Each of the Reporting Persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein, if any."}],"balance_after":1117734,"derivative":{"exercise_price":13.42,"exercise_date":"2026-01-13","expiration_date":"2027-06-30","underlying":"Common Stock","underlying_shares":1117734},"source":{"system":"sec-edgar","filing":"0001193125-26-014218","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000119312526014218/ownership.xml","form_type":"4"}},{"id":938819,"issuer":{"id":5820,"kind":"organization","name":"Foghorn Therapeutics Inc.","symbol":"FHTX"},"owners":[{"id":63978,"kind":"organization","name":"Flagship Pioneering, LLC","position":1,"cik":"0001400240","reported_name":"Flagship Pioneering, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":2,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":3,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63983,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","position":4,"cik":"0001826217","reported_name":"Flagship Pioneering Special Opportunities Fund II General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64114,"kind":"organization","name":"Flagship Pioneering Special Opportunities Fund II, L.P.","position":5,"cik":"0001761283","reported_name":"Flagship Pioneering Special Opportunities Fund II, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69363,"kind":"person","name":"Flagship Ventures Fund V General Partner LLC","position":6,"cik":"0001724575","reported_name":"Flagship Ventures Fund V General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69364,"kind":"person","name":"Flagship Ventures Fund V, L.P.","position":7,"cik":"0001627639","reported_name":"Flagship Ventures Fund V, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69365,"kind":"person","name":"Flagship Ventures Opportunities Fund I General Partner LLC","position":8,"cik":"0001725004","reported_name":"Flagship Ventures Opportunities Fund I General Partner LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69366,"kind":"person","name":"Flagship Ventures Opportunities Fund I, L.P.","position":9,"cik":"0001677345","reported_name":"Flagship Ventures Opportunities Fund I, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":10,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Pre-Funded Warrants to purchase Common Stock","published_at":"2026-01-15T17:00:05.000Z","date":"2026-01-13","kind":"grant","planned":false,"acquired":true,"shares":2235468,"price":6.7099,"value":14999766.7332,"ownership":{"direct":false,"nature":"By Flagship Pioneering Fund VII, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 13, 2026, pursuant to a registered direct offering by the Issuer, Flagship Pioneering Fund VII, L.P. 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Each of the reporting persons except for Flagship Fund VII disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein."}],"balance_after":3931685,"source":{"system":"sec-edgar","filing":"0000950170-23-032871","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000095017023032871/ownership.xml","form_type":"4"}},{"id":1830606,"issuer":{"id":108468,"kind":"organization","name":"Evelo Biosciences, Inc.","symbol":"EVLO"},"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":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":3,"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":4,"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":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":6,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":7,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":8,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-07-13T17:15:30.000Z","date":"2023-07-11","kind":"purchase","planned":false,"acquired":true,"shares":1082251,"price":2.31,"value":2499999.81,"ownership":{"direct":false,"nature":"By Nutritional Health LTP Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On July 11, 2023, Flagship Ventures Fund IV, L.P. (\"Flagship Fund IV\"), Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired 1,082,251 shares, 1,082,251 shares and 3,246,753 shares, respectively, of the Issuer's Common Stock in a private placement at a price of $2.31 per share."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by Nutritional LTP. Nutritional Health LTP Fund General Partner LLC (\"Nutritional LTP GP\") is the general partner of Nutritional LTP. Flagship Pioneering, Inc. (\"Flagship Pioneering\") is the manager of Nutritional LTP GP. Dr. Afeyan is the Chief Executive Officer, director and sole stockholder of Flagship Pioneering. 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":1493241,"source":{"system":"sec-edgar","filing":"0000950170-23-032871","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000095017023032871/ownership.xml","form_type":"4"}},{"id":1830605,"issuer":{"id":108468,"kind":"organization","name":"Evelo Biosciences, Inc.","symbol":"EVLO"},"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":63982,"kind":"organization","name":"Nutritional Health LTP Fund General Partner LLC","position":3,"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":4,"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":5,"cik":"0001400240","reported_name":"Flagship Pioneering Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":63981,"kind":"organization","name":"Flagship Pioneering Fund VII General Partner LLC","position":6,"cik":"0001805917","reported_name":"Flagship Pioneering Fund VII General Partner LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":64112,"kind":"organization","name":"Flagship Pioneering Fund VII, L.P.","position":7,"cik":"0001805916","reported_name":"Flagship Pioneering Fund VII, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":44731,"kind":"person","name":"Afeyan Noubar","position":8,"cik":"0001222012","reported_name":"AFEYAN NOUBAR","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2023-07-13T17:15:30.000Z","date":"2023-07-11","kind":"purchase","planned":false,"acquired":true,"shares":1082251,"price":2.31,"value":2499999.81,"ownership":{"direct":false,"nature":"By Flagship Ventures Fund IV, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On July 11, 2023, Flagship Ventures Fund IV, L.P. (\"Flagship Fund IV\"), Nutritional Health LTP Fund, L.P. (\"Nutritional LTP\") and Flagship Pioneering Fund VII, L.P. (\"Flagship Fund VII\") acquired 1,082,251 shares, 1,082,251 shares and 3,246,753 shares, respectively, of the Issuer's Common Stock in a private placement at a price of $2.31 per share."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by Flagship Fund IV. Flagship Ventures Fund IV General Partner LLC (\"Flagship Fund IV GP\") is the general partner of Flagship Fund IV. Noubar B. Afeyan, Ph.D. (\"Dr. Afeyan\") 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."}],"balance_after":1461795,"source":{"system":"sec-edgar","filing":"0000950170-23-032871","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805916/000095017023032871/ownership.xml","form_type":"4"}}]}