Security record · archived quarter
CSTL
Castle Biosciences, Inc. · Healthcare · Medical - Diagnostics & Research
16Tracked holders
0Δ holders
9.41MShares held
$214.29MReported value
+1New positions
−1Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -6.5% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 76 | -1 | 16.76M | $400.39M | +6 | −6 |
| Q1 2026 | 79 | -9 | 16.13M | $395.93M | +4 | −13 |
| Q4 2025 | 87 | +2 | 17.12M | $665.58M | +2 | — |
| Q3 2025 | 16 | 0 | 9.41M | $214.29M | +1 | −1 |
| Q2 2025 | 13 | -1 | 9.39M | $191.81M | — | −1 |
| Q1 2025 | 11 | 0 | 4.13M | $82.76M | +1 | −1 |
| Q4 2024 | 11 | +2 | 4.84M | $128.97M | +4 | −2 |
| Q3 2024 | 8 | 0 | 2.64M | $75.25M | — | — |
| Q2 2024 | 8 | — | 1.95M | $42.47M | — | — |
Who holds it · Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 3.19M | +1.1% | $72.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 2.17M | +0.1% | $49.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | The Vanguard Group ✦ (passive) | 2.17M | +0.1% | $49.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 2.17M | +0.1% | $49.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 2.17M | +0.1% | $49.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 2.17M | +0.1% | $49.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | State Street Global Advisors ✦ (passive) | 724.08K | +2.3% | $16.49M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | Geode Capital Management ✦ (passive) | 698.61K | +1.3% | $15.91M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 23 | Geode Capital Management ✦ (passive) | 698.61K | +1.3% | $15.91M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 24 | Millennium Management ✦ | 575.09K | +34.2% | $13.09M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 25 | Renaissance Technologies ✦ | 562.60K | -16.1% | $12.81M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 26 | Goldman Sachs Group ✦ | 345.10K | — | $7.86M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | Goldman Sachs Group ✦ | 345.10K | — | $7.86M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Point72 Asset Management ✦ | 336.96K | New | $7.67M | 0.0% | New | 1 | SEC ↗ |
| 29 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Morgan Stanley ✦ | 269.63K | — | $6.14M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Citadel Advisors ✦ | 250.91K | -71.8% | $5.71M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 37 | Citadel Advisors ✦ | 250.91K | -71.8% | $5.71M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 38 | D. E. Shaw & Co. ✦ | 92.61K | -37.5% | $2.11M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 39 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | JPMorgan Chase ✦ | 55.56K | — | $1.27M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | AQR Capital Management ✦ | 50.84K | +3.3% | $1.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 48 | AQR Capital Management ✦ | 50.84K | +3.3% | $1.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 49 | AQR Capital Management ✦ | 50.84K | +3.3% | $1.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 50 | AQR Capital Management ✦ | 50.84K | +3.3% | $1.16M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 51 | T. Rowe Price ✦ | 32.59K | +23.4% | $743,000 | 0.0% | ▲ Add | 6 | SEC ↗ |
| 52 | Fidelity (FMR) ✦ | 28.54K | +18.9% | $649,902 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Fidelity (FMR) ✦ | 28.54K | +18.9% | $649,902 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Two Sigma Investments ✦ | 25.70K | -9.0% | $585,189 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Point72 Asset Management | $7.67M | 0.0% |
Exited
| Wellington Management | $8.32M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 186 holders, 27.52M shares, $653.08M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 17
Juvenal Tobin W
Officer · 1.73K sh · $51,191
Aug 14
MAETZOLD DEREK J
Officer, Director · 1.10K sh · $33,022
Aug 14
MAETZOLD DEREK J
Officer, Director · 2.71K sh · $81,474
Aug 14
MAETZOLD DEREK J
Officer, Director · 2.31K sh · $69,226
Aug 14
MAETZOLD DEREK J
Officer, Director · 278 sh · $8,346
Aug 14
Stokes Frank
Officer · 24.91K sh · $741,511
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q3 2025 ·
Methodology ·
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