RNAM
Avidity Biosciences Inc · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth -7.1% ·
share flow -2.1% ·
net new positions -7.7%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 16.19M | — | $459.68M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 2 | T. Rowe Price ✦ | 10.81M | -4.7% | $306.97M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 3 | BlackRock ✦ (passive) | 9.34M | — | $265.17M | 0.0% | n/c | 1 | SEC ↗ ×15 |
| 4 | Wellington Management ✦ | 9.25M | -4.5% | $262.69M | 0.0% | ▼ Trim | 5 | SEC ↗ ×9 |
| 5 | The Vanguard Group ✦ (passive) | 9.25M | — | $262.65M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 6 | State Street Global Advisors ✦ (passive) | 4.20M | -2.8% | $119.32M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | Geode Capital Management ✦ (passive) | 2.85M | +3.4% | $80.89M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 8 | Adage Capital Partners ✦ | 1.53M | -28.8% | $43.37M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 9 | Norges Bank ✦ (passive) | 995.12K | +18.7% | $28.26M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | D. E. Shaw & Co. ✦ | 237.40K | New | $6.74M | 0.0% | New | 1 | SEC ↗ |
| 11 | Millennium Management ✦ | 236.99K | +1290.1% | $6.73M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 12 | Marshall Wace ✦ | 60.22K | -86.8% | $1.71M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 13 | Citadel Advisors ✦ | 21.72K | +34.2% | $616,905 | 0.0% | ▲ Add | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $6.74M | 0.0% |
Exited
| Two Sigma Investments | $826,560 | was 0.0% |
| AQR Capital Management | $318,374 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1 holders, 8.00K shares, $236,160 reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.