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).
| 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.
| 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 |