Avidity Biosciences, Inc.
Total Trades
132
Buys
0
Sells
81
Largest Trade
N/A
Insiders
12
Institutional Funds
268
Inst. Value
$1M+
Activist Filings
50
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| LEVIN ARTHUR A | Director | SELL | $50K–$100K | 2K | $28.60 | Jan 24, 2025 |
| MacLean Michael F | CFO | SELL | $50K–$100K | 3K | $28.59 | Jan 24, 2025 |
| McCarthy Teresa | CHRO | SELL | $50K–$100K | 3K | $28.59 | Jan 24, 2025 |
| Flanagan W. Michael | Chief Scientific O… | SELL | $100K–$500K | 6K | $28.60 | Jan 24, 2025 |
| Boyce Sarah | President and CEO | SELL | $100K–$500K | 10K | $28.59 | Jan 24, 2025 |
| Gallagher Kathleen P. | Chief Program Offi… | SELL | $100K–$500K | 9K | $29.53 | Jan 24, 2025 |
| Hughes Steven George | Chief Medical Offi… | SELL | $100K–$500K | 4K | $28.59 | Jan 24, 2025 |
| McCarthy Teresa | CHRO | EXERCISE | $100K–$500K | 25K | $14.22 | Nov 20, 2024 |
| McCarthy Teresa | CHRO | SELL | $1M+ | 25K | $41.14 | Nov 20, 2024 |
| LEVIN ARTHUR A | Director | SELL | $100K–$500K | 3K | $42.12 | Nov 20, 2024 |
| LEVIN ARTHUR A | Director | EXERCISE | $1K–$15K | 3K | $1.24 | Nov 20, 2024 |
| MacLean Michael F | CFO | SELL | $1M+ | 106K | $45.56 | Nov 8, 2024 |
| MacLean Michael F | CFO | EXERCISE | $500K+ | 79K | $8.43 | Nov 8, 2024 |
| LEVIN ARTHUR A | Director | SELL | $100K–$500K | 5K | $46.63 | Oct 23, 2024 |
| LEVIN ARTHUR A | Director | EXERCISE | $1K–$15K | 5K | $1.24 | Oct 23, 2024 |
| McCarthy Teresa | CHRO | SELL | $1M+ | 25K | $48.52 | Oct 17, 2024 |
| McCarthy Teresa | CHRO | EXERCISE | $100K–$500K | 25K | $14.22 | Oct 17, 2024 |
| Thompson Tamar | Director | EXERCISE | $500K+ | 30K | $27.63 | Oct 9, 2024 |
| Thompson Tamar | Director | SELL | $1M+ | 30K | $44.98 | Oct 9, 2024 |
| Flanagan W. Michael | CSTO | EXERCISE | $1M+ | 63K | $26.75 | Oct 3, 2024 |
| Flanagan W. Michael | CSTO | SELL | $1M+ | 63K | $47.62 | Oct 3, 2024 |
| McCarthy Teresa | CHRO | GRANT | N/A | 50K | — | Sep 24, 2024 |
| McCarthy Teresa | CHRO | SELL | $500K+ | 13K | $44.00 | Sep 24, 2024 |
| Flanagan W. Michael | CSTO | GRANT | N/A | 50K | — | Sep 24, 2024 |
| Flanagan W. Michael | CSTO | SELL | $1M+ | 25K | $43.95 | Sep 24, 2024 |
| Boyce Sarah | President and CEO | SELL | $1M+ | 33K | $44.00 | Sep 24, 2024 |
| Boyce Sarah | President and CEO | GRANT | N/A | 125K | — | Sep 24, 2024 |
| MacLean Michael F | CFO | GRANT | N/A | 50K | — | Sep 24, 2024 |
| MacLean Michael F | CFO | SELL | $500K+ | 12K | $44.00 | Sep 24, 2024 |
| LEVIN ARTHUR A | Director | EXERCISE | $1K–$15K | 5K | $1.24 | Sep 20, 2024 |
| LEVIN ARTHUR A | Director | SELL | $100K–$500K | 5K | $45.73 | Sep 20, 2024 |
| LEVIN ARTHUR A | Director | SELL | $100K–$500K | 5K | $45.19 | Aug 21, 2024 |
| LEVIN ARTHUR A | Director | EXERCISE | $1K–$15K | 5K | $1.24 | Aug 21, 2024 |
| LEVIN ARTHUR A | Director | EXERCISE | $1K–$15K | 5K | $1.24 | Jun 21, 2024 |
| LEVIN ARTHUR A | Director | SELL | $100K–$500K | 5K | $37.59 | Jun 21, 2024 |
| McCarthy Teresa | CHRO | GRANT | N/A | 50K | — | Jun 20, 2024 |
| McCarthy Teresa | CHRO | SELL | $100K–$500K | 10K | $39.13 | Jun 20, 2024 |
| MacLean Michael F | CFO | GRANT | N/A | 50K | — | Jun 20, 2024 |
| MacLean Michael F | CFO | SELL | $100K–$500K | 11K | $39.13 | Jun 20, 2024 |
| Boyce Sarah | President and CEO | GRANT | N/A | 125K | — | Jun 20, 2024 |
| Boyce Sarah | President and CEO | SELL | $1M+ | 32K | $39.13 | Jun 20, 2024 |
| Flanagan W. Michael | CSTO | SELL | $100K–$500K | 10K | $39.13 | Jun 20, 2024 |
| Flanagan W. Michael | CSTO | GRANT | N/A | 50K | — | Jun 20, 2024 |
| MacLean Michael F | CFO | EXERCISE | $500K+ | 104K | $8.82 | Jun 14, 2024 |
| MacLean Michael F | CFO | SELL | $1M+ | 104K | $35.72 | Jun 14, 2024 |
| LEVIN ARTHUR A | Director | SELL | $1M+ | 100K | $38.07 | Jun 14, 2024 |
| Boyce Sarah | President and CEO | EXERCISE | $100K–$500K | 300K | $1.24 | Jun 14, 2024 |
| Boyce Sarah | President and CEO | SELL | $1M+ | 300K | $38.63 | Jun 14, 2024 |
| Boyce Sarah | President and CEO | EXERCISE | $15K–$50K | 28K | $1.24 | Jun 5, 2024 |
| Boyce Sarah | President and CEO | SELL | $500K+ | 28K | $27.42 | Jun 5, 2024 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 268 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 8.6M | $1M+ | SH |
| BALYASNY ASSET MANAGEMENT L.P. | 6.0M | $1M+ | SH |
| Pentwater Capital Management LP | 6.0M | $1M+ | SH |
| HBK INVESTMENTS L P | 4.4M | $1M+ | SH |
| STATE STREET CORP | 4.1M | $1M+ | SH |
| NORGES BANK | 3.0M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7M | $1M+ | SH |
| GLAZER CAPITAL, LLC | 2.5M | $1M+ | SH |
| TIG Advisors, LLC | 1.8M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | $1M+ | SH |
| ALLIANCEBERNSTEIN L.P. | 1.0M | $1M+ | SH |
| KRYGER CAPITAL Ltd | 1.0M | $1M+ | SH |
| Frazier Life Sciences Management, L.P. | 983K | $1M+ | SH |
| TANG CAPITAL MANAGEMENT LLC | 900K | $1M+ | SH |
| NEXPOINT ASSET MANAGEMENT, L.P. | 891K | $1M+ | SH |
| Westchester Capital Management, LLC | 870K | $1M+ | SH |
| Squarepoint Ops LLC | 868K | $1M+ | SH |
| ALPINE ASSOCIATES MANAGEMENT INC. | 868K | $1M+ | SH |
| SOROS FUND MANAGEMENT LLC | 841K | $1M+ | SH |
| Sofinnova Investments, Inc. | 745K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
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
SC 13G/A · Dec 5, 2025
5.5%
8.2M shares
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
SC 13G/A · Nov 14, 2025
10.7%
14.5M shares
SC 13G/A · Nov 7, 2025
2.1%
3.0M shares
SC 13G/A · Nov 5, 2025
15.0%
21.5M shares
SC 13G/A · Oct 30, 2025
9.6%
13.2M shares
SC 13D/A · Oct 30, 2025
3.1%
4.7M shares
SC 13G/A · Oct 17, 2025
6.4%
8.6M shares
SC 13G/A · Aug 7, 2025
10.1%
12.1M shares
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
SC 13G/A · May 12, 2025
13.0%
15.6M shares
SC 13G/A · Apr 17, 2025
7.5%
9.0M shares
SC 13G · Feb 14, 2025
5.9%
7.1M shares
SC 13G/A · Nov 14, 2024
5.4%
6.3M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Nov 14, 2024
9.0%
10.6M shares
SC 13G · Nov 14, 2024
8.3%
9.9M shares
Cowen Financial Products LLC 27-0423711
SC 13G/A · Nov 13, 2024
0.0%
0 shares
SC 13G/A · Nov 13, 2024
4.3%
5.1M shares
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
SC 13G/A · Nov 4, 2024
7.8%
9.2M shares
SC 13D/A · Aug 23, 2024
60.0%
12.1M shares
SC 13G · May 6, 2024
5.1%
4.9M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Mar 11, 2024
12.1%
9.7M shares
SC 13D/A · Mar 1, 2024
60.0%
9.7M shares
SC 13G/A · Feb 14, 2024
3.3%
2.5M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2024
9.3%
6.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.5%
4.0M shares
Cowen Financial Products LLC 27-0423711
SC 13G/A · Feb 2, 2024
7.6%
5.6M shares
SC 13G/A · Jan 25, 2024
8.8%
6.5M shares
SC 13D/A · Jan 24, 2024
58.4%
6.7M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · Jan 23, 2024
4.6%
0 shares
SC 13G · Dec 4, 2023
6.4%
5.1M shares
SC 13G/A · Jul 10, 2023
15.0%
10.6M shares
SC 13G/A · Feb 14, 2023
0.0%
0 shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2023
10.1%
6.7M shares
SC 13G/A · Feb 3, 2023
8.0%
5.3M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Feb 3, 2023
5.4%
0 shares
SC 13D/A · Feb 2, 2023
59.0%
6.0M shares
Cowen Financial Products LLC 27-0423711
SC 13G/A · Jan 11, 2023
6.5%
5.2M shares
SC 13G · Dec 30, 2022
8.2%
5.5M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G · Dec 27, 2022
1.8%
1.0M shares
Cowen Financial Products LLC 27-0423711
SC 13G · Aug 18, 2022
6.6%
3.3M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Aug 10, 2022
10.2%
5.1M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G/A · Feb 14, 2022
0.5%
250K shares
SC 13G/A · Feb 14, 2022
5.9%
2.8M shares