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These shares were sold in multiple transactions at prices within the range of $34.09 to $34.70, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 114,453 unvested RSUs."}],"balance_after":131636,"source":{"system":"sec-edgar","filing":"0000950170-24-108154","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024108154/ownership.xml","form_type":"4"}},{"id":1402490,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-09-19T20:52:28.000Z","date":"2024-09-18","kind":"sale","planned":true,"acquired":false,"shares":4340,"price":34.41,"value":149339.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 17, 2020. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $34.09 to $34.70, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 114,453 unvested RSUs."}],"balance_after":136272,"source":{"system":"sec-edgar","filing":"0000950170-24-108154","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024108154/ownership.xml","form_type":"4"}},{"id":1409830,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-09-11T20:13:05.000Z","date":"2024-09-11","kind":"sale","planned":true,"acquired":false,"shares":2722,"price":31.89,"value":86804.58,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $31.59 to $32.41, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 123,429 unvested RSUs."}],"balance_after":140612,"source":{"system":"sec-edgar","filing":"0000950170-24-105512","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024105512/ownership.xml","form_type":"4"}},{"id":1409829,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-09-11T20:13:05.000Z","date":"2024-09-11","kind":"sale","planned":true,"acquired":false,"shares":2548,"price":31.89,"value":81255.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $31.59 to $32.41, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 123,429 unvested RSUs."}],"balance_after":143334,"source":{"system":"sec-edgar","filing":"0000950170-24-105512","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024105512/ownership.xml","form_type":"4"}},{"id":1427802,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-08-20T20:26:55.000Z","date":"2024-08-19","kind":"sale","planned":true,"acquired":false,"shares":328,"price":46,"value":15088.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on November 15, 2023. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 that was entered into on January 25, 2024 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $45.53 to $46.45, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 128,699 unvested RSUs."}],"balance_after":145882,"source":{"system":"sec-edgar","filing":"0000950170-24-099124","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024099124/ownership.xml","form_type":"4"}},{"id":1427801,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-08-20T20:26:55.000Z","date":"2024-08-19","kind":"sale","planned":true,"acquired":false,"shares":2582,"price":45.01,"value":116215.82,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on November 15, 2023. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 that was entered into on January 25, 2024 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $44.51 to $45.48, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes of this Form 4."}],"balance_after":146210,"source":{"system":"sec-edgar","filing":"0000950170-24-099124","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024099124/ownership.xml","form_type":"4"}},{"id":1460204,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-24","kind":"exercise","planned":true,"acquired":false,"shares":10213,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"This Form 4/A is being filed to correct the number of stock options exercised and subsequent shares of common stock sold as reported in Tables I and II of the original Form 4 filed on June 24, 2024, which inadvertently reported 10,163 stock options exercised and subsequent shares of common stock sold instead of the 10,213 shares reported herein."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option was granted on July 31, 2020. The shares underlying the option vest over four years, with 25% of the shares vesting on July 31, 2021 and the remaining shares vesting in equal quarterly installments thereafter."}],"balance_after":60486,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":10213},"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1460203,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-21","kind":"exercise","planned":true,"acquired":false,"shares":29787,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option was granted on July 31, 2020. The shares underlying the option vest over four years, with 25% of the shares vesting on July 31, 2021 and the remaining shares vesting in equal quarterly installments thereafter."}],"balance_after":70699,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":29787},"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1460202,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-24","kind":"sale","planned":true,"acquired":false,"shares":10213,"price":35.33,"value":360825.29,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"shares","element":"transactionShares","label":"F3","text":"This Form 4/A is being filed to correct the number of stock options exercised and subsequent shares of common stock sold as reported in Tables I and II of the original Form 4 filed on June 24, 2024, which inadvertently reported 10,163 stock options exercised and subsequent shares of common stock sold instead of the 10,213 shares reported herein."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $35.00 to $35.63, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes 134,629 unvested RSUs."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1460201,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-24","kind":"exercise","planned":true,"acquired":true,"shares":10213,"price":5.54,"value":56580.02,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"This Form 4/A is being filed to correct the number of stock options exercised and subsequent shares of common stock sold as reported in Tables I and II of the original Form 4 filed on June 24, 2024, which inadvertently reported 10,163 stock options exercised and subsequent shares of common stock sold instead of the 10,213 shares reported herein."}],"balance_after":159005,"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1460200,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-21","kind":"sale","planned":true,"acquired":false,"shares":29787,"price":35.01,"value":1042842.87,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $35.00 to $35.11, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1460199,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-07-04T01:00:02.000Z","date":"2024-06-21","kind":"exercise","planned":true,"acquired":true,"shares":29787,"price":5.54,"value":165019.98,"ownership":{"direct":true},"balance_after":178579,"source":{"system":"sec-edgar","filing":"0000950170-24-081748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024081748/ownership.xml","form_type":"4/A","original_submission_date":"2024-06-24"}},{"id":1470775,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-24","kind":"exercise","planned":true,"acquired":false,"shares":10163,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option was granted on July 31, 2020. The shares underlying the option vest over four years, with 25% of the shares vesting on July 31, 2021 and the remaining shares vesting in equal quarterly installments thereafter."}],"balance_after":60536,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":10163},"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1470774,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-21","kind":"exercise","planned":true,"acquired":false,"shares":29787,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option was granted on July 31, 2020. The shares underlying the option vest over four years, with 25% of the shares vesting on July 31, 2021 and the remaining shares vesting in equal quarterly installments thereafter."}],"balance_after":70699,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":29787},"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1470773,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-24","kind":"sale","planned":true,"acquired":false,"shares":10163,"price":35.33,"value":359058.79,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $35.00 to $35.60, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 134,629 unvested RSUs."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1470772,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-24","kind":"exercise","planned":true,"acquired":true,"shares":10163,"price":5.54,"value":56303.02,"ownership":{"direct":true},"balance_after":158955,"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1470771,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-21","kind":"sale","planned":true,"acquired":false,"shares":29787,"price":35.01,"value":1042842.87,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $35.00 to $35.11, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1470770,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-25T00:41:02.000Z","date":"2024-06-21","kind":"exercise","planned":true,"acquired":true,"shares":29787,"price":5.54,"value":165019.98,"ownership":{"direct":true},"balance_after":178579,"source":{"system":"sec-edgar","filing":"0000950170-24-077029","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024077029/ownership.xml","form_type":"4"}},{"id":1480854,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-06-14T01:45:04.000Z","date":"2024-06-12","kind":"exercise","planned":true,"acquired":false,"shares":40000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option was granted on July 31, 2020. The shares underlying the option vest over four years, with 25% of the shares vesting on July 31, 2021 and the remaining shares vesting in equal quarterly installments thereafter."}],"balance_after":100486,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0000950170-24-073289","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024073289/ownership.xml","form_type":"4"}},{"id":1480853,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-14T01:45:04.000Z","date":"2024-06-12","kind":"sale","planned":true,"acquired":false,"shares":13964,"price":33.7,"value":470586.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $33.51 to $34.04, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 134,629 unvested RSUs."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-073289","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024073289/ownership.xml","form_type":"4"}},{"id":1480852,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-14T01:45:04.000Z","date":"2024-06-12","kind":"sale","planned":true,"acquired":false,"shares":26036,"price":33.17,"value":863614.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 11, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $32.50 to $33.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4."}],"balance_after":162756,"source":{"system":"sec-edgar","filing":"0000950170-24-073289","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024073289/ownership.xml","form_type":"4"}},{"id":1480851,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-14T01:45:04.000Z","date":"2024-06-12","kind":"exercise","planned":true,"acquired":true,"shares":40000,"price":5.54,"value":221600.0,"ownership":{"direct":true},"balance_after":188792,"source":{"system":"sec-edgar","filing":"0000950170-24-073289","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024073289/ownership.xml","form_type":"4"}},{"id":1483647,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock option (right to buy)","published_at":"2024-06-11T23:34:41.000Z","date":"2024-06-10","kind":"exercise","planned":true,"acquired":false,"shares":80000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option was granted on July 31, 2020. 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These shares were sold in multiple transactions at prices within the range of $31.00 to $31.52, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes 134,629 unvested RSUs."}],"balance_after":148792,"source":{"system":"sec-edgar","filing":"0000950170-24-072153","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024072153/ownership.xml","form_type":"4"}},{"id":1483645,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-11T23:34:41.000Z","date":"2024-06-11","kind":"sale","planned":true,"acquired":false,"shares":2357,"price":31.23,"value":73609.11,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. 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These shares were sold in multiple transactions at prices within the range of $29.85 to $30.61, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4."}],"balance_after":154062,"source":{"system":"sec-edgar","filing":"0000950170-24-072153","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024072153/ownership.xml","form_type":"4"}},{"id":1483643,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-06-11T23:34:41.000Z","date":"2024-06-10","kind":"exercise","planned":true,"acquired":true,"shares":80000,"price":5.54,"value":443200.0,"ownership":{"direct":true},"balance_after":234062,"source":{"system":"sec-edgar","filing":"0000950170-24-072153","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024072153/ownership.xml","form_type":"4"}},{"id":1511664,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-05-18T01:05:44.000Z","date":"2024-05-16","kind":"sale","planned":true,"acquired":false,"shares":489,"price":28.59,"value":13980.51,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on November 15, 2023. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 that was entered into on January 25, 2024 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $28.51 to $28.70, inclusive."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 139,899 unvested RSUs."}],"balance_after":154062,"source":{"system":"sec-edgar","filing":"0000950170-24-062078","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024062078/ownership.xml","form_type":"4"}},{"id":1511663,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-05-18T01:05:44.000Z","date":"2024-05-16","kind":"sale","planned":true,"acquired":false,"shares":2249,"price":28.2,"value":63421.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on November 15, 2023. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 that was entered into on January 25, 2024 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $27.50 to $28.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in the footnotes of this Form 4."}],"balance_after":154551,"source":{"system":"sec-edgar","filing":"0000950170-24-062078","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024062078/ownership.xml","form_type":"4"}},{"id":1578917,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-03-13T10:04:11.000Z","date":"2024-03-11","kind":"sale","planned":true,"acquired":false,"shares":2292,"price":25.7,"value":58904.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. 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These shares were sold in multiple transactions at prices within the range of $27.39 to $27.42, inclusive."}],"balance_after":159092,"source":{"system":"sec-edgar","filing":"0000950170-24-030485","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024030485/ownership.xml","form_type":"4"}},{"id":1578915,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-03-13T10:04:11.000Z","date":"2024-03-08","kind":"sale","planned":true,"acquired":false,"shares":26908,"price":26.66,"value":717367.28,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $26.32 to $27.30, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":159383,"source":{"system":"sec-edgar","filing":"0000950170-24-030485","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024030485/ownership.xml","form_type":"4"}},{"id":1584368,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-03-12T01:56:37.000Z","date":"2024-03-07","kind":"sale","planned":true,"acquired":false,"shares":1591,"price":25.85,"value":41127.35,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on November 15, 2023. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $25.84 to $26.33, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 151,099 unvested RSUs."}],"balance_after":186291,"source":{"system":"sec-edgar","filing":"0000950170-24-029614","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000095017024029614/ownership.xml","form_type":"4"}},{"id":1714459,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-12-12T22:34:21.000Z","date":"2023-12-11","kind":"sale","planned":false,"acquired":false,"shares":1616,"price":10.72,"value":17323.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $10.72 to $10.82, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 157,029 unvested RSUs."}],"balance_after":187882,"source":{"system":"sec-edgar","filing":"0001209191-23-058329","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123058329/doc4.xml","form_type":"4"}},{"id":1739241,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-16T21:30:00.000Z","date":"2023-11-15","kind":"grant","planned":false,"acquired":true,"shares":36952,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option was granted on November 15, 2023. The shares underlying the option are scheduled to vest over four years in equal monthly installments through November 15, 2027."}],"balance_after":36952,"derivative":{"exercise_price":10.88,"expiration_date":"2033-11-14","underlying":"Common Stock","underlying_shares":36952},"source":{"system":"sec-edgar","filing":"0001209191-23-055526","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123055526/doc4.xml","form_type":"4"}},{"id":1739240,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-11-16T21:30:00.000Z","date":"2023-11-15","kind":"grant","planned":false,"acquired":true,"shares":94893,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of shares of Common Stock issuable under 94,893 restricted stock units (\"RSUs\"). Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs are scheduled to vest in equal quarterly installments over four years with the first installment vesting on February 15, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 162,299 unvested RSUs."}],"balance_after":189498,"source":{"system":"sec-edgar","filing":"0001209191-23-055526","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123055526/doc4.xml","form_type":"4"}},{"id":1751454,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-11-02T21:16:26.000Z","date":"2023-11-02","kind":"sale","planned":false,"acquired":false,"shares":9939,"price":7.4,"value":73548.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on July 10, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $7.12 to $7.60, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in this footnote of this Form 4."}],"balance_after":94605,"source":{"system":"sec-edgar","filing":"0001209191-23-054194","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123054194/doc4.xml","form_type":"4"}},{"id":1776299,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-09-20T20:48:44.000Z","date":"2023-09-18","kind":"sale","planned":false,"acquired":false,"shares":2672,"price":9.41,"value":25143.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 17, 2020. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 67,406 unvested RSUs."}],"balance_after":104544,"source":{"system":"sec-edgar","filing":"0001209191-23-050172","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123050172/doc4.xml","form_type":"4"}},{"id":1782168,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-09-13T23:51:52.000Z","date":"2023-09-12","kind":"sale","planned":false,"acquired":false,"shares":1635,"price":10.41,"value":17020.35,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $10.09 to $10.43, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 76,382 unvested RSUs."}],"balance_after":107216,"source":{"system":"sec-edgar","filing":"0001209191-23-049359","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123049359/doc4.xml","form_type":"4"}},{"id":1856021,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-06-14T22:40:19.000Z","date":"2023-06-13","kind":"sale","planned":false,"acquired":false,"shares":1625,"price":12.43,"value":20198.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 81,652 unvested RSUs."}],"balance_after":108851,"source":{"system":"sec-edgar","filing":"0001209191-23-037166","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123037166/doc4.xml","form_type":"4"}},{"id":1952353,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-03-15T21:50:09.000Z","date":"2023-03-14","kind":"sale","acquired":false,"shares":1559,"price":13.33,"value":20781.47,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 86,922 unvested RSUs."}],"balance_after":110476,"source":{"system":"sec-edgar","filing":"0001209191-23-018980","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919123018980/doc4.xml","form_type":"4"}},{"id":2088160,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2022-12-13T22:05:21.000Z","date":"2022-12-09","kind":"grant","acquired":true,"shares":69000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This option was granted on December 9, 2022. The shares underlying the option are scheduled to vest over four years in equal monthly installments through December 10, 2026."}],"balance_after":69000,"derivative":{"exercise_price":10.72,"expiration_date":"2032-12-08","underlying":"Common Stock","underlying_shares":69000},"source":{"system":"sec-edgar","filing":"0001209191-22-060970","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122060970/doc4.xml","form_type":"4"}},{"id":2088159,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-12-13T22:05:21.000Z","date":"2022-12-12","kind":"sale","acquired":false,"shares":751,"price":10.87,"value":8163.37,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes 92,191 unvested RSUs."}],"balance_after":112035,"source":{"system":"sec-edgar","filing":"0001209191-22-060970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122060970/doc4.xml","form_type":"4"}},{"id":2088158,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-12-13T22:05:21.000Z","date":"2022-12-09","kind":"grant","acquired":true,"shares":44000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of shares of Common Stock issuable under 44,000 restricted stock units (\"RSUs\"). Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs are scheduled to vest in equal quarterly installments over four years with the first installment vesting on March 10, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 94,710 unvested RSUs."}],"balance_after":112786,"source":{"system":"sec-edgar","filing":"0001209191-22-060970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122060970/doc4.xml","form_type":"4"}},{"id":2153524,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-09-21T20:08:20.000Z","date":"2022-09-20","kind":"disposition_to_issuer","acquired":false,"shares":2629,"price":13.7,"value":36017.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 17, 2020. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price that represents the price of all shares sold by a broker on September 20, 2022 to satisfy tax withholding obligations. These shares were sold in multiple transactions at prices within the range of $13.70 to $13.78, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 50,710 unvested RSUs."}],"balance_after":68786,"source":{"system":"sec-edgar","filing":"0001209191-22-050888","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122050888/doc4.xml","form_type":"4"}},{"id":2158508,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-09-15T21:26:11.000Z","date":"2022-09-15","kind":"disposition_to_issuer","acquired":false,"shares":786,"price":14.05,"value":11043.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price that represents the price of all shares sold by a broker on September 15, 2022 to satisfy tax withholding obligations. These shares were sold in multiple transactions at prices within the range of $14.05 to $14.18, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 59,686 unvested RSUs."}],"balance_after":71415,"source":{"system":"sec-edgar","filing":"0001209191-22-050120","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122050120/doc4.xml","form_type":"4"}},{"id":2212178,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2022-07-06T22:19:07.000Z","date":"2022-07-05","kind":"grant","acquired":true,"shares":36219,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option was granted on July 31, 2020, with 100% of the option to vest upon the clearance date of an Investigational New Drug (IND) application submitted to the U.S. Food and Drug Administration (FDA) by the Company with respect to one of its product candidates. On July 5, 2022, in connection with the clearance by the FDA of the Company's IND application for DYNE-251, the Compensation Committee determined that the performance condition had been achieved."}],"balance_after":36219,"derivative":{"exercise_price":5.54,"expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":36219},"source":{"system":"sec-edgar","filing":"0001209191-22-041333","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122041333/doc4.xml","form_type":"4"}},{"id":2231583,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-06-16T00:03:50.000Z","date":"2022-06-14","kind":"disposition_to_issuer","acquired":false,"shares":802,"price":4.95,"value":3969.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 62,205 unvested RSUs."}],"balance_after":72201,"source":{"system":"sec-edgar","filing":"0001209191-22-037146","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122037146/doc4.xml","form_type":"4"}},{"id":2335684,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2022-03-14T21:08:46.000Z","date":"2022-03-11","kind":"sale","acquired":false,"shares":765,"price":8.73,"value":6678.45,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price that represents the price of all shares sold by a broker on March 11, 2022 to satisfy tax withholding obligations. These shares were sold in multiple transactions at prices within the range of $8.68 to $8.73, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 64,724 unvested RSUs."}],"balance_after":73003,"source":{"system":"sec-edgar","filing":"0001209191-22-018535","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919122018535/doc4.xml","form_type":"4"}},{"id":2473653,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2021-12-14T21:21:38.000Z","date":"2021-12-10","kind":"grant","acquired":true,"shares":60472,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option was granted on December 10, 2021. The shares underlying the option are scheduled to vest over four years in equal monthly installments through December 10, 2025."}],"balance_after":60472,"derivative":{"exercise_price":13.12,"expiration_date":"2031-12-09","underlying":"Common Stock","underlying_shares":60472},"source":{"system":"sec-edgar","filing":"0001209191-21-069423","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919121069423/doc4.xml","form_type":"4"}},{"id":2473652,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2021-12-14T21:21:38.000Z","date":"2021-12-10","kind":"grant","acquired":true,"shares":40315,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of shares of Common Stock issuable under 40,315 restricted stock units (\"RSUs\"). Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs are scheduled to vest in equal quarterly installments over four years with the first installment vesting on March 10, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 67,243 unvested RSUs. Each unvested RSU represents the right to receive one share of Common Stock upon vesting."}],"balance_after":73768,"source":{"system":"sec-edgar","filing":"0001209191-21-069423","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919121069423/doc4.xml","form_type":"4"}},{"id":2560011,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2021-09-24T14:50:48.000Z","date":"2021-09-23","kind":"sale","acquired":false,"shares":2451,"price":17.22,"value":42206.22,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 17, 2020. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a \"binding contract\" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $17.17 to $17.30, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 26,928 unvested RSUs."}],"balance_after":33453,"source":{"system":"sec-edgar","filing":"0001209191-21-057527","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000120919121057527/doc4.xml","form_type":"4"}},{"id":3027150,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2020-09-18T21:16:09.000Z","date":"2020-09-16","kind":"grant","acquired":true,"shares":111405,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option was granted on September 16, 2020. The shares underlying the option are scheduled to vest over four years in equal monthly installments through September 16, 2024."}],"balance_after":111405,"derivative":{"exercise_price":19,"expiration_date":"2030-09-15","underlying":"Common Stock","underlying_shares":111405},"source":{"system":"sec-edgar","filing":"0000899243-20-025742","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000089924320025742/doc4.xml","form_type":"4"}},{"id":3027149,"issuer":{"id":3948,"kind":"organization","name":"Dyne Therapeutics, Inc.","symbol":"DYN"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2020-09-18T21:16:09.000Z","date":"2020-09-17","kind":"grant","acquired":true,"shares":35904,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Consists of shares of Common Stock issuable under 35,904 restricted stock units (\"RSUs\"). Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs are scheduled to vest in equal annual installments over four years with the first installment vesting on September 17, 2021."}],"balance_after":35904,"source":{"system":"sec-edgar","filing":"0000899243-20-025742","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818794/000089924320025742/doc4.xml","form_type":"4"}},{"id":3721396,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2018-12-21T16:11:45.000Z","date":"2018-12-06","kind":"exercise","acquired":false,"shares":15,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 amendment is being filed to report the exercise of 15 stock options which was inadvertently omitted from the original Form 4 filed by the reporting person on December 10, 2018."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option vests over a four-year period at a rate of twenty-five percent (25%) on November 30, 2017, and in 36 equal monthly installments thereafter."}],"balance_after":40647,"derivative":{"exercise_price":68.65,"expiration_date":"2026-12-01","underlying":"Common Stock","underlying_shares":15},"source":{"system":"sec-edgar","filing":"0001209191-18-063896","document":"doc4a.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118063896/doc4a.xml","form_type":"4/A","original_submission_date":"2018-12-10"}},{"id":3721395,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-21T16:11:45.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":300,"price":106.7042,"value":32011.26,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The range in prices for the transaction reported on this line was $106.51 to $107.42.  The average weighted price was $106.7042.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person's amount of securities beneficially owned following the reporting transaction is amended to reflect the accurate amount owned."}],"balance_after":13750,"source":{"system":"sec-edgar","filing":"0001209191-18-063896","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118063896/doc4a.xml","form_type":"4/A","original_submission_date":"2018-12-10"}},{"id":3721394,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-21T16:11:45.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":1100,"price":106.1123,"value":116723.53,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The range in prices for the transaction reported on this line was $105.50 to $106.49.  The average weighted price was $106.1123.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person's amount of securities beneficially owned following the reporting transaction is amended to reflect the accurate amount owned."}],"balance_after":14050,"source":{"system":"sec-edgar","filing":"0001209191-18-063896","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118063896/doc4a.xml","form_type":"4/A","original_submission_date":"2018-12-10"}},{"id":3721393,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-21T16:11:45.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":475,"price":104.1333,"value":49463.3175,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The range in prices for the transaction reported on this line was $104.01 to $104.29.  The average weighted price was $104.1333.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person's amount of securities beneficially owned following the reporting transaction is amended to reflect the accurate amount owned."}],"balance_after":15150,"source":{"system":"sec-edgar","filing":"0001209191-18-063896","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118063896/doc4a.xml","form_type":"4/A","original_submission_date":"2018-12-10"}},{"id":3721392,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-21T16:11:45.000Z","date":"2018-12-06","kind":"exercise","acquired":true,"shares":15,"price":68.65,"value":1029.75,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 amendment is being filed to report the exercise of 15 stock options which was inadvertently omitted from the original Form 4 filed by the reporting person on December 10, 2018."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person's amount of securities beneficially owned following the reporting transaction is amended to reflect the accurate amount owned."}],"balance_after":15625,"source":{"system":"sec-edgar","filing":"0001209191-18-063896","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118063896/doc4a.xml","form_type":"4/A","original_submission_date":"2018-12-10"}},{"id":3737761,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-10T16:11:16.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":300,"price":106.7042,"value":32011.26,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The range in prices for the transaction reported on this line was $106.51 to $107.42.  The average weighted price was $106.7042.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":13735,"source":{"system":"sec-edgar","filing":"0001209191-18-061735","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118061735/doc4.xml","form_type":"4"}},{"id":3737760,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-10T16:11:16.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":1100,"price":106.1123,"value":116723.53,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The range in prices for the transaction reported on this line was $105.50 to $106.49.  The average weighted price was $106.1123.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":14035,"source":{"system":"sec-edgar","filing":"0001209191-18-061735","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118061735/doc4.xml","form_type":"4"}},{"id":3737759,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-10T16:11:16.000Z","date":"2018-12-06","kind":"sale","acquired":false,"shares":475,"price":104.1333,"value":49463.3175,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The range in prices for the transaction reported on this line was $104.01 to $104.29.  The average weighted price was $104.1333.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":15135,"source":{"system":"sec-edgar","filing":"0001209191-18-061735","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118061735/doc4.xml","form_type":"4"}},{"id":3741581,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-12-06T16:14:12.000Z","date":"2018-12-03","kind":"sale","acquired":false,"shares":1890,"price":113.8282,"value":215135.298,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares were sold to cover tax withholding obligations incurred in connection with the vesting of Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The range in prices for the transaction reported on this line was $113.60 to $114.00.  The average weighted price was $113.8282.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":15610,"source":{"system":"sec-edgar","filing":"0001209191-18-061242","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118061242/doc4.xml","form_type":"4"}},{"id":3903533,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2018-06-06T16:36:18.000Z","date":"2018-06-04","kind":"exercise","acquired":false,"shares":3500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option vests over a four-year period at a rate of twenty-five percent (25%) on November 30, 2017, and in 36 equal monthly installments thereafter."}],"balance_after":40662,"derivative":{"exercise_price":68.65,"expiration_date":"2026-12-01","underlying":"Common Stock","underlying_shares":3500},"source":{"system":"sec-edgar","filing":"0001209191-18-036072","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118036072/doc4.xml","form_type":"4"}},{"id":3903532,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-06-06T16:36:18.000Z","date":"2018-06-04","kind":"sale","acquired":false,"shares":3500,"price":199.1119,"value":696891.65,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The range in prices for the transaction reported on this line was $199.00 to $199.30.  The average weighted price was $199.1119.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":17500,"source":{"system":"sec-edgar","filing":"0001209191-18-036072","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118036072/doc4.xml","form_type":"4"}},{"id":3903531,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-06-06T16:36:18.000Z","date":"2018-06-04","kind":"exercise","acquired":true,"shares":3500,"price":68.65,"value":240275.0,"ownership":{"direct":true},"balance_after":21000,"source":{"system":"sec-edgar","filing":"0001209191-18-036072","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118036072/doc4.xml","form_type":"4"}},{"id":4020297,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2018-03-02T16:01:07.000Z","date":"2018-02-28","kind":"exercise","acquired":false,"shares":1044,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This option vests over a four-year period at a rate of twenty-five percent (25%) on November 30, 2017, and in 36 equal monthly installments thereafter."}],"balance_after":44162,"derivative":{"exercise_price":68.65,"expiration_date":"2026-12-01","underlying":"Common Stock","underlying_shares":1044},"source":{"system":"sec-edgar","filing":"0001209191-18-015546","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118015546/doc4.xml","form_type":"4"}},{"id":4020296,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-03-02T16:01:07.000Z","date":"2018-02-28","kind":"sale","acquired":false,"shares":644,"price":203.0312,"value":130752.0928,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The range in prices for the transaction reported on this line was $202.90 to $203.2750.  The average weighted price was $203.0312.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":17500,"source":{"system":"sec-edgar","filing":"0001209191-18-015546","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118015546/doc4.xml","form_type":"4"}},{"id":4020295,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-03-02T16:01:07.000Z","date":"2018-02-28","kind":"sale","acquired":false,"shares":400,"price":202.1,"value":80840.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The range in prices for the transaction reported on this line was $201.75 to $202.60.  The average weighted price was $202.10.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":18144,"source":{"system":"sec-edgar","filing":"0001209191-18-015546","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118015546/doc4.xml","form_type":"4"}},{"id":4020294,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-03-02T16:01:07.000Z","date":"2018-02-28","kind":"exercise","acquired":true,"shares":1044,"price":68.65,"value":71670.6,"ownership":{"direct":true},"balance_after":18544,"source":{"system":"sec-edgar","filing":"0001209191-18-015546","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118015546/doc4.xml","form_type":"4"}},{"id":4076503,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2018-02-05T16:04:31.000Z","date":"2018-02-01","kind":"grant","acquired":true,"shares":25000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests over a four-year period, at a rate of twenty-five percent (25%) on January 4, 2019, and in 36 equal monthly installments."}],"balance_after":25000,"derivative":{"exercise_price":205.25,"expiration_date":"2028-02-01","underlying":"Common Stock","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0001209191-18-007407","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118007407/doc4.xml","form_type":"4"}},{"id":4076502,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-05T16:04:31.000Z","date":"2018-02-01","kind":"grant","acquired":true,"shares":6250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Restricted stock units for common stock vest over a four-year period at a rate of 25% on 01/04/2019, 25% on 01/04/2020, 25% on 01/04/2021, and 25% on 01/04/2022."}],"balance_after":17500,"source":{"system":"sec-edgar","filing":"0001209191-18-007407","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118007407/doc4.xml","form_type":"4"}},{"id":4081916,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"exercise","acquired":true,"shares":14794,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F14","text":"This option vests over a four-year period at a rate of twenty-five percent (25%) on November 30, 2017, and in 36 equal monthly installments thereafter."}],"balance_after":45206,"derivative":{"exercise_price":68.65,"expiration_date":"2026-12-01","underlying":"Common Stock","underlying_shares":14794},"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081915,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":82,"price":203.6,"value":16695.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F13","text":"The range in prices for the transaction reported on this line was $203.50 to $203.70.  The average weighted price was $203.60.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":11250,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081914,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":204,"price":202.6801,"value":41346.7404,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"The range in prices for the transaction reported on this line was $202.40 to $203.00.  The average weighted price was $202.6801.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":11332,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081913,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":770,"price":201.5739,"value":155211.903,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"The range in prices for the transaction reported on this line was $201.30 to $202.05.  The average weighted price was $201.5739.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":11536,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081912,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":733,"price":200.8812,"value":147245.9196,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"The range in prices for the transaction reported on this line was $200.20 to $201.10.  The average weighted price was $200.8812.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":12306,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081911,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":697,"price":199.4324,"value":139004.3828,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The range in prices for the transaction reported on this line was $199.10 to $200.05.  The average weighted price was $199.4324.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":13039,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081910,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":490,"price":198.4634,"value":97247.066,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The range in prices for the transaction reported on this line was $198.10 to $199.00.  The average weighted price was $198.4634.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":13736,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081909,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":1385,"price":197.6065,"value":273685.0025,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The range in prices for the transaction reported on this line was $197.10 to $198.00.  The average weighted price was $197.6065.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":14226,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081908,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":1702,"price":196.6339,"value":334670.8978,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The range in prices for the transaction reported on this line was $196.10 to $197.05.  The average weighted price was $196.6339.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":15611,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081907,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":2039,"price":195.5667,"value":398760.5013,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The range in prices for the transaction reported on this line was $195.10 to $196.05.  The average weighted price was $195.5667.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":17313,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081906,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":4657,"price":194.6525,"value":906496.6925,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The range in prices for the transaction reported on this line was $194.10 to $195.05.  The average weighted price was $194.6525.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":19352,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081905,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":3703,"price":193.7439,"value":717433.6617,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The range in prices for the transaction reported on this line was $193.10 to $194.05.  The average weighted price was $193.7439.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":24009,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081904,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"sale","acquired":false,"shares":800,"price":192.4927,"value":153994.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sales reported in the Form 4 were effectd pursuant to a 10b5-1 trading plan adopted by the reporting person on December 18, 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The range in prices for the transaction reported on this line was $192.00 to $192.95.  The average weighted price was $192.4927.  The reporting person will provide, upon request by the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price."}],"balance_after":27712,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4081903,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2018-02-01T16:31:34.000Z","date":"2018-01-30","kind":"exercise","acquired":true,"shares":14794,"price":68.65,"value":1015608.1,"ownership":{"direct":true},"balance_after":28512,"source":{"system":"sec-edgar","filing":"0001209191-18-006467","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919118006467/doc4.xml","form_type":"4"}},{"id":4142219,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2017-12-05T16:09:51.000Z","date":"2017-12-01","kind":"sale","acquired":false,"shares":1282,"price":172.15,"value":220696.3,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Restricted stock units for common stock vest over a four-year period at a rate of 25% on 11/30/2017, 25% on 11/30/2018, 25% on 11/30/2019, and 25% on 11/30/2020."},{"field":"shares","element":"transactionShares","label":"F2","text":"Shares were sold to cover tax withholding obligations incurred in connection with the vesting of Restricted Stock Units."}],"balance_after":13718,"source":{"system":"sec-edgar","filing":"0001209191-17-063885","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919117063885/doc4.xml","form_type":"4"}},{"id":4535540,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2016-12-02T16:08:39.000Z","date":"2016-12-01","kind":"grant","acquired":true,"shares":60000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This option vests over a four-year period at a rate of twenty-five percent (25%) on November 30, 2017, and in 36 equal monthly installments thereafter."}],"balance_after":60000,"derivative":{"exercise_price":68.65,"expiration_date":"2026-12-01","underlying":"Common Stock","underlying_shares":60000},"source":{"system":"sec-edgar","filing":"0001209191-16-152995","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919116152995/doc4.xml","form_type":"4"}},{"id":4535539,"issuer":{"id":78923,"kind":"organization","name":"bluebird bio, Inc.","symbol":"BLUE"},"owners":[{"id":87376,"kind":"person","name":"HIGH SUSANNA GATTI","position":1,"cik":"0001691005","reported_name":"HIGH SUSANNA GATTI","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2016-12-02T16:08:39.000Z","date":"2016-12-01","kind":"grant","acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Restricted stock units for common stock vest over a four-year period at a rate of 25% on 11/30/2017, 25% on 11/30/2018, 25% on 11/30/2019, and 25% on 11/30/2020."}],"balance_after":15000,"source":{"system":"sec-edgar","filing":"0001209191-16-152995","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1691005/000120919116152995/doc4.xml","form_type":"4"}}]}