Avidity Biosciences, Inc. (RNA) Insider Ownership

Historic Ownership Trends

Over the 90-day window ending December 12, 2025, Avidity Biosciences's three dominant insider ownership positions are held by Chief Human Resources Officer Teresa Mccarthy (97.13K shares), Chief Scientific Officer W. Michael Flanagan (80.19K shares), Chief Commercial Officer Eric Mosbrooker (55.00K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Investments, Lp Rtw 4,795,000 06 Aug, 2021
Sarah Boyce President And CEO 305,871 05 Sep, 2025
Teresa Mccarthy Chief Human Resources Officer 97,130 17 Oct, 2025
W. Michael Flanagan Chief Scientific Officer 80,195 12 Sep, 2025
Troy Edward Wilson 72,201 09 Sep, 2025
Michael F Maclean Chief Financial Officer 65,806 15 Aug, 2025
Eric Mosbrooker Chief Commercial Officer 55,000 07 Oct, 2025
Kathleen P. Gallagher Chief Program Officer 50,204 02 Sep, 2025
John B Moriarty Chief Legal Officer 47,755 05 Aug, 2025
Arthur A Levin 42,150 08 Aug, 2025
Charles Iii Calderaro Chief Technical Officer 40,000 08 Jan, 2025
Steven George Hughes Chief Medical Officer 38,867 24 Oct, 2025
Tamar Thompson 6,692 12 Jun, 2025
Carsten Boess 6,692 12 Jun, 2025
Edward M. Md Kaye 6,692 12 Jun, 2025
Noreen Henig 6,692 12 Jun, 2025
Jean Jinsun Kim 6,692 12 Jun, 2025
Simona Skerjanec 6,692 12 Jun, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
22 Oct, 2025 Steven George Hughes Common Stock A 2,209 $10.16 41,076 D M
22 Oct, 2025 Steven George Hughes Common Stock D 2,209 $47.54 38,867 D S
15 Oct, 2025 Teresa Mccarthy Common Stock A 20,000 $22.34 117,130 D M
15 Oct, 2025 Teresa Mccarthy Common Stock D 20,000 $50.15 97,130 D S
03 Oct, 2025 Eric Mosbrooker Common Stock A 6,562 $9.05 61,562 D M
03 Oct, 2025 Eric Mosbrooker Common Stock D 6,562 $45.38 55,000 D S
22 Sep, 2025 Steven George Hughes Common Stock A 2,208 $10.16 41,075 D M
22 Sep, 2025 Steven George Hughes Common Stock D 2,208 $40.58 38,867 D S
15 Sep, 2025 Steven George Hughes Common Stock A 1,542 $6.57 40,409 D M
15 Sep, 2025 Teresa Mccarthy Common Stock A 15,000 $22.34 112,130 D M
15 Sep, 2025 Teresa Mccarthy Common Stock D 15,000 $41.41 97,130 D S
15 Sep, 2025 Steven George Hughes Common Stock D 1,542 $45.41 38,867 D S
11 Sep, 2025 W. Michael Flanagan Common Stock A 20,000 $14.22 100,195 D M
11 Sep, 2025 W. Michael Flanagan - - 100,195 D
11 Sep, 2025 W. Michael Flanagan - - 80,195 D
11 Sep, 2025 W. Michael Flanagan Common Stock D 20,000 $38.94 80,195 D S
05 Sep, 2025 Troy Edward Wilson Common Stock A 14,500 $12.48 83,925 D M
05 Sep, 2025 Sarah Boyce Common Stock A 50,000 $1.24 355,871 D M
05 Sep, 2025 Troy Edward Wilson Common Stock D 14,500 $50.00 69,425 D S
05 Sep, 2025 Sarah Boyce Common Stock D 50,000 $49.95 305,871 D S