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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. 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Those RSUs were initially granted as performance-based restricted stock units (PSUs), and converted to time-based RSUs as a result of a performance objective achieved by the Issuer on September 19, 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."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This represents a weighted-average price. These shares were sold in multiple transactions at prices ranging from $31.05 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 $28.69. 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":82428,"source":{"system":"sec-edgar","filing":"0001599901-25-000031","document":"wk-form4_1737680795.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1599901/000159990125000031/wk-form4_1737680795.xml","form_type":"4"}},{"id":1296182,"issuer":{"id":11854,"kind":"organization","name":"Avidity Biosciences, Inc.","symbol":"RNAM"},"owners":[{"id":51597,"kind":"person","name":"Hughes Steven George","position":1,"cik":"0001747528","reported_name":"Hughes Steven George","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2025-01-24T01:06:41.000Z","date":"2025-01-21","kind":"sale","planned":true,"acquired":false,"shares":1915,"price":28.5955,"value":54760.3825,"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 of RSUs on January 20, 2025 and the sale of the resulting shares of common stock on January 21, 2025. 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 $28.59 to $29.47. 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The RSUs represent a right to receive shares of the Issuer's common stock, at no additional conversion or exercise price.  25% of the RSUs vest and settle on August 15, 2019 and the remaining shares vest in 12 equal quarterly installments thereafter."}],"balance_after":160714,"source":{"system":"sec-edgar","filing":"0001209191-18-046894","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1497253/000120919118046894/doc4.xml","form_type":"4"}}]}