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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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes the following securities previously acquired by the Reporting Person: (i) 13,500 RSUs under the Issuer's 2020 Incentive Award Plan and (ii) 1,330 shares of common stock under the Issuer's 2020 Employee Stock Purchase Plan."}],"balance_after":14830,"source":{"system":"sec-edgar","filing":"0001599901-24-000053","document":"wk-form4_1713821325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000159990124000053/wk-form4_1713821325.xml","form_type":"4"}},{"id":1537594,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-04-22T21:28:56.000Z","date":"2024-04-19","kind":"exercise","planned":true,"acquired":true,"shares":5000,"price":1.24,"value":6200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes the following securities previously acquired by the Reporting Person: (i) 13,500 RSUs under the Issuer's 2020 Incentive Award Plan and (ii) 1,330 shares of common stock under the Issuer's 2020 Employee Stock Purchase Plan."}],"balance_after":19830,"source":{"system":"sec-edgar","filing":"0001599901-24-000053","document":"wk-form4_1713821325.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000159990124000053/wk-form4_1713821325.xml","form_type":"4"}},{"id":1549650,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-04-04T00:26:45.000Z","date":"2024-04-03","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":27.1107,"value":542214.0,"ownership":{"direct":false,"nature":"By family trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $27.00 to $27.28. 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These shares were sold in multiple transactions at prices ranging from $23.69 to $24.56. 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These shares were sold in multiple transactions at prices ranging from $22.00 to $22.23. 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes the following securities previously acquired by the Reporting Person: (i) 16,141 restricted stock units (RSUs) under the Issuer's 2020 Incentive Award Plan and (ii) 1,330 shares of common stock under the Issuer's 2020 Employee Stock Purchase Plan."}],"balance_after":17471,"source":{"system":"sec-edgar","filing":"0001599901-24-000042","document":"wk-form4_1710290471.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000159990124000042/wk-form4_1710290471.xml","form_type":"4"}},{"id":1581114,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-03-13T00:41:21.000Z","date":"2024-03-12","kind":"exercise","planned":true,"acquired":true,"shares":25000,"price":1.24,"value":31000.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes the following securities previously acquired by the Reporting Person: (i) 16,141 restricted stock units (RSUs) under the Issuer's 2020 Incentive Award Plan and (ii) 1,330 shares of common stock under the Issuer's 2020 Employee Stock Purchase Plan."}],"balance_after":42471,"source":{"system":"sec-edgar","filing":"0001599901-24-000042","document":"wk-form4_1710290471.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000159990124000042/wk-form4_1710290471.xml","form_type":"4"}},{"id":1673032,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-01-23T20:14:34.000Z","date":"2024-01-22","kind":"sale","planned":true,"acquired":false,"shares":1859,"price":10.13,"value":18831.67,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs on January 20, 2024. 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."}],"balance_after":17471,"source":{"system":"sec-edgar","filing":"0001599901-24-000012","document":"wk-form4_1706040865.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000159990124000012/wk-form4_1706040865.xml","form_type":"4"}},{"id":1854339,"issuer":{"id":1723,"kind":"organization","name":"Stoke Therapeutics, Inc.","symbol":"STOK"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Director Stock Option (Right to 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were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $24.16 to $24.30 per share. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":19330,"source":{"system":"sec-edgar","filing":"0001209191-23-009938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123009938/doc4.xml","form_type":"4"}},{"id":2013605,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-02-16T01:30:25.000Z","date":"2023-02-14","kind":"sale","acquired":false,"shares":9477,"price":23.6246,"value":223890.3342,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $23.16 to $24.08 per share. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":19853,"source":{"system":"sec-edgar","filing":"0001209191-23-009938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123009938/doc4.xml","form_type":"4"}},{"id":2013604,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-02-16T01:30:25.000Z","date":"2023-02-14","kind":"exercise","acquired":true,"shares":10000,"price":1.24,"value":12400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."}],"balance_after":29330,"source":{"system":"sec-edgar","filing":"0001209191-23-009938","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123009938/doc4.xml","form_type":"4"}},{"id":2047506,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-25T02:07:54.000Z","date":"2023-01-20","kind":"grant","acquired":true,"shares":144000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"1/48th of the total number of shares subject to the options shall vest on each monthly anniversary of January 20, 2023 (the \"Vesting Commencement Date\"), subject to the Reporting Person's continuous service to the Issuer on each such vesting date, so that the options shall be fully vested on the fourth anniversary of the Vesting Commencement Date."}],"balance_after":144000,"derivative":{"exercise_price":22.47,"expiration_date":"2033-01-19","underlying":"Common Stock","underlying_shares":144000},"source":{"system":"sec-edgar","filing":"0001209191-23-004758","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123004758/doc4.xml","form_type":"4"}},{"id":2047505,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-01-25T02:07:54.000Z","date":"2023-01-20","kind":"grant","acquired":true,"shares":18000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of the Issuer's common stock. The RSUs shall vest in four equal installments on the first four anniversaries of January 20, 2023, subject to the Reporting Person's continuous service to the Issuer on each such vesting date."}],"balance_after":19330,"source":{"system":"sec-edgar","filing":"0001209191-23-004758","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123004758/doc4.xml","form_type":"4"}},{"id":2053769,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-18T01:50:31.000Z","date":"2023-01-12","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"25% of the shares subject to the option vested on February 19, 2021, and 1/48th of the shares subject to the option will vest monthly thereafter."}],"balance_after":78423,"derivative":{"exercise_price":1.24,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-23-003625","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123003625/doc4.xml","form_type":"4"}},{"id":2053768,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-01-18T01:50:31.000Z","date":"2023-01-12","kind":"sale","acquired":false,"shares":10000,"price":22.0028,"value":220028.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $22.00 to $22.04. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":1330,"source":{"system":"sec-edgar","filing":"0001209191-23-003625","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123003625/doc4.xml","form_type":"4"}},{"id":2053767,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-01-18T01:50:31.000Z","date":"2023-01-12","kind":"exercise","acquired":true,"shares":10000,"price":1.24,"value":12400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."}],"balance_after":11330,"source":{"system":"sec-edgar","filing":"0001209191-23-003625","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123003625/doc4.xml","form_type":"4"}},{"id":2072652,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-01-03T22:40:56.000Z","date":"2022-12-29","kind":"exercise","acquired":false,"shares":40000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"25% of the shares subject to the option vested on February 19, 2021, and 1/48th of the shares subject to the option will vest monthly thereafter."}],"balance_after":88423,"derivative":{"exercise_price":1.24,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0001209191-23-000358","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123000358/doc4.xml","form_type":"4"}},{"id":2072651,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-01-03T22:40:56.000Z","date":"2022-12-29","kind":"sale","acquired":false,"shares":40000,"price":22.0142,"value":880568.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $22.00 to $22.16. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":1330,"source":{"system":"sec-edgar","filing":"0001209191-23-000358","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123000358/doc4.xml","form_type":"4"}},{"id":2072650,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2023-01-03T22:40:56.000Z","date":"2022-12-29","kind":"exercise","acquired":true,"shares":40000,"price":1.24,"value":49600.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."}],"balance_after":41330,"source":{"system":"sec-edgar","filing":"0001209191-23-000358","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919123000358/doc4.xml","form_type":"4"}},{"id":2169986,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-16","kind":"exercise","acquired":false,"shares":3499,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"25% of the shares subject to the option vested on February 19, 2021, and 1/48th of the shares subject to the option will vest monthly thereafter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On June 11 2020, the Reporting Person filed a Form 3 which inadvertently overreported the number of options under this option grant due to a typographical error. The aggregate number of options beneficially owned has been updated in this Form 4 to reflect the total number of options held by the Reporting Person following the transactions reported on this Form 4 and the Reporting Person's previously filed reports."}],"balance_after":128423,"derivative":{"exercise_price":1.24,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":3499},"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169985,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-15","kind":"exercise","acquired":false,"shares":34758,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"25% of the shares subject to the option vested on February 19, 2021, and 1/48th of the shares subject to the option will vest monthly thereafter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On June 11 2020, the Reporting Person filed a Form 3 which inadvertently overreported the number of options under this option grant due to a typographical error. The aggregate number of options beneficially owned has been updated in this Form 4 to reflect the total number of options held by the Reporting Person following the transactions reported on this Form 4 and the Reporting Person's previously filed reports."}],"balance_after":131922,"derivative":{"exercise_price":1.24,"expiration_date":"2030-02-18","underlying":"Common Stock","underlying_shares":34758},"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169984,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-15","kind":"exercise","acquired":false,"shares":27740,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This option is exercisable as to vested and unvested shares. The option was granted on August 29, 2017 and 1/48th of the shares subject to the option vest monthly."}],"balance_after":0,"derivative":{"exercise_price":0.53,"expiration_date":"2027-08-28","underlying":"Common Stock","underlying_shares":27740},"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169983,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-12","kind":"exercise","acquired":false,"shares":14003,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This option is exercisable as to vested and unvested shares. The option was granted on August 29, 2017 and 1/48th of the shares subject to the option vest monthly."}],"balance_after":27740,"derivative":{"exercise_price":0.53,"expiration_date":"2027-08-28","underlying":"Common Stock","underlying_shares":14003},"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169982,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-16","kind":"sale","acquired":false,"shares":3499,"price":22.0798,"value":77257.2202,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $22.00 to $22.30.The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":1330,"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169981,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-16","kind":"exercise","acquired":true,"shares":3499,"price":1.24,"value":4338.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person."}],"balance_after":4829,"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169980,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR A","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2022-09-01T00:08:07.000Z","date":"2022-08-15","kind":"sale","acquired":false,"shares":62498,"price":22.1182,"value":1382343.2636,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The option exercise and sale reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 ranging from $22.00 to $22.47.The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, 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":1330,"source":{"system":"sec-edgar","filing":"0001209191-22-048195","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1181556/000120919122048195/doc4.xml","form_type":"4"}},{"id":2169979,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":40934,"kind":"person","name":"LEVIN ARTHUR A","position":1,"cik":"0001181556","reported_name":"LEVIN ARTHUR 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