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The Reporting Person undertakes to provide the Issuer, any securityholder 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."}],"balance_after":80195,"source":{"system":"sec-edgar","filing":"0001599901-25-000113","document":"wk-form4_1749766731.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990125000113/wk-form4_1749766731.xml","form_type":"4"}},{"id":1112879,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":63865,"kind":"person","name":"Flanagan W. Michael","position":1,"cik":"0001841990","reported_name":"Flanagan W. 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This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a \"sell-to-cover\" transaction and does not represent a discretionary trade by the Reporting Person. The Reporting Person has executed an instruction letter for the automatic sale of such \"sell-to-cover\" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $30.96 to $31.06. 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This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a \"sell-to-cover\" transaction and does not represent a discretionary trade by the Reporting Person. The Reporting Person has executed an instruction letter for the automatic sale of such \"sell-to-cover\" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $28.59 to $28.89. The Reporting Person undertakes to provide the Issuer, any securityholder 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."}],"balance_after":91975,"source":{"system":"sec-edgar","filing":"0001599901-25-000037","document":"wk-form4_1737681121.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990125000037/wk-form4_1737681121.xml","form_type":"4"}},{"id":1296188,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":63865,"kind":"person","name":"Flanagan W. Michael","position":1,"cik":"0001841990","reported_name":"Flanagan W. 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The Reporting Person has executed an instruction letter for the automatic sale of such \"sell-to-cover\" shares, intended to satisfy the affirmative defense conditions of Rule 10b5-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $28.59 to $29.63. 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The RSUs shall vest in four equal installments on the first four anniversaries of January 6, 2025, subject to the Reporting Person's continuous service to the Issuer on each such vesting date."}],"balance_after":97647,"source":{"system":"sec-edgar","filing":"0001599901-25-000029","document":"wk-form4_1736386545.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990125000029/wk-form4_1736386545.xml","form_type":"4"}},{"id":1325127,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":63865,"kind":"person","name":"Flanagan W. Michael","position":1,"cik":"0001841990","reported_name":"Flanagan W. 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The Reporting Person undertakes to provide the Issuer, any securityholder 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."}],"balance_after":72647,"source":{"system":"sec-edgar","filing":"0001599901-24-000207","document":"wk-form4_1734650256.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990124000207/wk-form4_1734650256.xml","form_type":"4"}},{"id":1331928,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":63865,"kind":"person","name":"Flanagan W. Michael","position":1,"cik":"0001841990","reported_name":"Flanagan W. 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The Reporting Person undertakes to provide the Issuer, any securityholder 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."}],"balance_after":85389,"source":{"system":"sec-edgar","filing":"0001599901-24-000197","document":"wk-form4_1734131313.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990124000197/wk-form4_1734131313.xml","form_type":"4"}},{"id":1331926,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":63865,"kind":"person","name":"Flanagan W. Michael","position":1,"cik":"0001841990","reported_name":"Flanagan W. 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