PRME
Prime Medicine, Inc. · Healthcare · Biotechnology
Momentum inputs (comparable managers):
holder breadth +9.1% ·
share flow -15.3% ·
net new positions +8.3%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 78 | +1 | 62.51M | $230.64M | +6 | −5 |
| Q1 2026 | 80 | +2 | 55.31M | $192.04M | +9 | −7 |
| Q4 2025 | 78 | 0 | 56.37M | $195.61M | +1 | −1 |
| Q3 2025 | 18 | +3 | 30.74M | $170.29M | +3 | — |
| Q2 2025 | 12 | +1 | 18.57M | $45.87M | +1 | — |
| Q1 2025 | 8 | 0 | 10.06M | $20.03M | +1 | −1 |
| Q4 2024 | 8 | -1 | 11.48M | $33.53M | +2 | −3 |
| Q3 2024 | 8 | -1 | 11.29M | $43.71M | +1 | −2 |
| Q2 2024 | 9 | — | 11.11M | $57.12M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 4.49M | — | $11.08M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | Fidelity (FMR) ✦ | 3.74M | — | $9.25M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | Fidelity (FMR) ✦ | 3.74M | — | $9.25M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | The Vanguard Group ✦ (passive) | 3.63M | — | $8.96M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | The Vanguard Group ✦ (passive) | 3.63M | — | $8.96M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | The Vanguard Group ✦ (passive) | 3.63M | — | $8.96M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | ARK Investment Management ✦ | 2.32M | -25.0% | $5.74M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 15 | Geode Capital Management ✦ (passive) | 1.51M | -1.0% | $3.73M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 16 | Geode Capital Management ✦ (passive) | 1.51M | -1.0% | $3.73M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 17 | State Street Global Advisors ✦ (passive) | 1.24M | +8.2% | $3.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | Citadel Advisors ✦ | 521.51K | New | $1.29M | 0.0% | New | 1 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 521.51K | New | $1.29M | 0.0% | New | 1 | SEC ↗ |
| 20 | AQR Capital Management ✦ | 424.36K | +74.1% | $1.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 21 | AQR Capital Management ✦ | 424.36K | +74.1% | $1.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 424.36K | +74.1% | $1.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | AQR Capital Management ✦ | 424.36K | +74.1% | $1.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 24 | Two Sigma Investments ✦ | 258.42K | -0.1% | $638,305 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 25 | Renaissance Technologies ✦ | 223.40K | -50.1% | $551,798 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | Millennium Management ✦ | 148.00K | -91.7% | $365,550 | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 27 | T. Rowe Price ✦ | 65.32K | -95.8% | $162,000 | 0.0% | ▼ Trim | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Citadel Advisors | $1.29M | 0.0% |
| Citadel Advisors | $1.29M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 189 holders, 97.53M shares, $314.58M 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.