RNA

Avidity Biosciences, Inc.

Pharmaceutical PreparationsNasdaqLarge accelerated filer

Total Trades

132

Buys

0

Sells

81

Largest Trade

N/A

Insiders

12

Institutional Funds

268

Inst. Value

$1M+

Activist Filings

50

Insider Trades

InsiderTitleTypeValueSharesPriceDate
LEVIN ARTHUR ADirectorSELL$100K–$500K5K$22.82Apr 22, 2024
LEVIN ARTHUR ADirectorEXERCISE$1K–$15K5K$1.24Apr 22, 2024
LEVIN ARTHUR ADirectorSELL$500K+20K$27.11Apr 4, 2024
Boyce SarahPresident and CEOSELL$500K+28K$26.25Apr 3, 2024
Boyce SarahPresident and CEOEXERCISE$15K–$50K28K$1.24Apr 3, 2024
LEVIN ARTHUR ADirectorSELL$100K–$500K5K$23.97Mar 21, 2024
LEVIN ARTHUR ADirectorEXERCISE$1K–$15K5K$1.24Mar 21, 2024
LEVIN ARTHUR ADirectorSELL$15K–$50K2K$10.13Jan 23, 2024
Boyce SarahPresident and CEOGRANTN/A63KJan 23, 2024
Boyce SarahPresident and CEOSELL$50K–$100K5K$10.13Jan 23, 2024
Flanagan W. MichaelCSTOSELL$15K–$50K4K$10.13Jan 23, 2024
Flanagan W. MichaelCSTOGRANTN/A20KJan 23, 2024
McCarthy TeresaCHROSELL$15K–$50K2K$10.13Jan 23, 2024
McCarthy TeresaCHROGRANTN/A17KJan 23, 2024
MacLean Michael FCFOSELL$15K–$50K2K$10.13Jan 23, 2024
MacLean Michael FCFOGRANTN/A23KJan 23, 2024
LEVIN ARTHUR ADirectorSELL$1K–$15K100$22.01Mar 17, 2023
LEVIN ARTHUR ADirectorEXERCISE<$1K100$1.24Mar 17, 2023
LEVIN ARTHUR AChief Scientific O…EXERCISE$1K–$15K10K$1.24Feb 16, 2023
LEVIN ARTHUR AChief Scientific O…SELL$100K–$500K10K$23.66Feb 16, 2023
Boyce SarahPresident and CEOSELL$1M+50K$24.35Feb 3, 2023
Boyce SarahPresident and CEOEXERCISE$50K–$100K50K$1.24Feb 3, 2023
LEVIN ARTHUR AChief Scientific O…EXERCISE$1K–$15K10K$1.24Jan 18, 2023
LEVIN ARTHUR AChief Scientific O…SELL$100K–$500K10K$22.00Jan 18, 2023
LEVIN ARTHUR AChief Scientific O…EXERCISE$15K–$50K40K$1.24Jan 3, 2023
LEVIN ARTHUR AChief Scientific O…SELL$500K+40K$22.01Jan 3, 2023
LEVIN ARTHUR AChief Scientific O…SELL$1M+80K$22.10Sep 1, 2022
LEVIN ARTHUR AChief Scientific O…EXERCISE$50K–$100K80K$0.87Sep 1, 2022
Boyce SarahPresident and CEOSELL$1M+50K$22.88Aug 26, 2022
Boyce SarahPresident and CEOEXERCISE$50K–$100K50K$1.24Aug 26, 2022
Boyce SarahPresident and CEOEXERCISE<$1K100$1.24Aug 18, 2022
Boyce SarahPresident and CEOSELL$1K–$15K100$22.47Aug 18, 2022
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

JANUS HENDERSON GROUP PLC

SC 13G/A · Feb 17, 2026

4.6%

6.9M shares

Wellington Management Group LLP

SC 13G/A · Feb 10, 2026

0.5%

723K shares

JANUS HENDERSON GROUP PLC

SC 13G/A · Dec 5, 2025

5.5%

8.2M shares

RA Capital Management, L.P.

SC 13G/A · Nov 14, 2025

5.9%

8.6M shares

T. Rowe Price Associates, Inc.

SC 13G/A · Nov 14, 2025

7.1%

9.8M shares

JANUS HENDERSON GROUP PLC

SC 13G/A · Nov 14, 2025

10.7%

14.5M shares

FMR LLC

SC 13G/A · Nov 7, 2025

2.1%

3.0M shares

FMR LLC

SC 13G/A · Nov 5, 2025

15.0%

21.5M shares

The Vanguard Group

SC 13G/A · Oct 30, 2025

9.6%

13.2M shares

RTW Investments, LP

SC 13D/A · Oct 30, 2025

3.1%

4.7M shares

BlackRock, Inc.

SC 13G/A · Oct 17, 2025

6.4%

8.6M shares

JANUS HENDERSON GROUP PLC

SC 13G/A · Aug 7, 2025

10.1%

12.1M shares

JANUS HENDERSON GROUP PLC

SC 13G/A · May 14, 2025

9.5%

11.5M shares

Wellington Management Group LLP

SC 13G/A · May 12, 2025

8.1%

9.7M shares

FMR LLC

SC 13G/A · May 12, 2025

13.0%

15.6M shares

BlackRock, Inc.

SC 13G/A · Apr 17, 2025

7.5%

9.0M shares

JANUS HENDERSON GROUP PLC

SC 13G · Feb 14, 2025

5.9%

7.1M shares

RA Capital Management, L.P.

SC 13G/A · Nov 14, 2024

5.4%

6.3M shares

9.0%

10.6M shares

Avoro Capital Advisors LLC

SC 13G · Nov 14, 2024

8.3%

9.9M shares

0.0%

0 shares

Bristol-Myers Squibb Company

SC 13G/A · Nov 13, 2024

4.3%

5.1M shares

The Vanguard Group

SC 13G/A · Nov 12, 2024

7.8%

9.2M shares

Wellington Management Group LLP

SC 13G · Nov 8, 2024

6.0%

7.0M shares

The Vanguard Group

SC 13G/A · Nov 4, 2024

7.8%

9.2M shares

RTW Investments, LP

SC 13D/A · Aug 23, 2024

60.0%

12.1M shares

RA Capital Management, L.P.

SC 13G · May 6, 2024

5.1%

4.9M shares

12.1%

9.7M shares

RTW Investments, LP

SC 13D/A · Mar 1, 2024

60.0%

9.7M shares

RA Capital Management, L.P.

SC 13G/A · Feb 14, 2024

3.3%

2.5M shares

9.3%

6.9M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

5.5%

4.0M shares

7.6%

5.6M shares

BlackRock, Inc.

SC 13G/A · Jan 25, 2024

8.8%

6.5M shares

RTW Investments, LP

SC 13D/A · Jan 24, 2024

58.4%

6.7M shares

Bristol-Myers Squibb Company

SC 13G · Dec 4, 2023

6.4%

5.1M shares

FMR LLC

SC 13G/A · Jul 10, 2023

15.0%

10.6M shares

EcoR1 Capital, LLC

SC 13G/A · Feb 14, 2023

0.0%

0 shares

10.1%

6.7M shares

BlackRock, Inc.

SC 13G/A · Feb 3, 2023

8.0%

5.3M shares

RTW Investments, LP

SC 13D/A · Feb 2, 2023

59.0%

6.0M shares

6.5%

5.2M shares

RA Capital Management, L.P.

SC 13G · Dec 30, 2022

8.2%

5.5M shares

1.8%

1.0M shares

6.6%

3.3M shares

10.2%

5.1M shares

0.5%

250K shares

EcoR1 Capital, LLC

SC 13G/A · Feb 14, 2022

5.9%

2.8M shares

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