Security record · archived quarter
CSTL
Castle Biosciences, Inc. · Healthcare · Medical - Diagnostics & Research
79Tracked holders
-9Δ holders
16.13MShares held
$395.93MReported value
+4New positions
−13Exits
Momentum inputs (comparable managers):
holder breadth -10.2% ·
share flow -1.6% ·
net new positions -11.4%
· formula
Broad distribution: falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | +1 | 8.87K | $298,940 | +1 | n/a |
| Q2 2026 | 76 | -1 | 16.83M | $401.45M | +6 | −6 |
| Q1 2026 | 79 | -9 | 16.13M | $395.93M | +4 | −13 |
| Q4 2025 | 87 | +2 | 17.12M | $665.58M | +2 | n/a |
| Q3 2025 | 16 | 0 | 9.41M | $214.29M | +1 | −1 |
| Q2 2025 | 13 | -1 | 9.39M | $191.81M | n/a | −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 | n/a | n/a |
| Q2 2024 | 8 | n/a | 1.95M | $42.47M | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 2.98M | -3.9% | $73.23M | 0.0% | ▼ Trim | 4 | SEC ↗ ×15 |
| 2 | Principal Financial Group Inc | 1.77M | -2.1% | $43.45M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 3 | Vanguard Capital Management Llc | 1.18M | n/a | $28.91M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Dimensional Fund Advisors Lp | 1.04M | -9.1% | $25.52M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 5 | Allianz Asset Management GmbH | 811.32K | +30.4% | $19.92M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 6 | State Street Global Advisors ✦ (passive) | 769.08K | +4.4% | $18.88M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 7 | Geode Capital Management ✦ (passive) | 728.10K | +1.8% | $17.88M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 8 | Qube Research & Technologies Ltd | 559.58K | +137.6% | $13.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | Renaissance Technologies ✦ | 532.80K | +8.1% | $13.08M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 10 | Nuveen, LLC | 522.13K | -0.5% | $12.82M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 11 | Morgan Stanley ✦ | 428.93K | +110.7% | $10.53M | 0.0% | ▲ Add | 3 | SEC ↗ ×7 |
| 12 | Connor, Clark & Lunn Investment… | 377.08K | -2.9% | $9.26M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | Millennium Management ✦ | 353.32K | +14.4% | $8.67M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 14 | Goldman Sachs Group ✦ | 341.17K | +18.8% | $8.38M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 15 | Schroder Investment Management Group | 298.94K | n/a | $7.04M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | Northern Trust Corp | 273.10K | +4.1% | $6.70M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 17 | Two Sigma Investments ✦ | 248.84K | +196.0% | $6.11M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 18 | Charles Schwab Investment… | 241.88K | -0.3% | $5.94M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 19 | New York State Common Retirement… | 233.05K | 0.0% | $5.72M | 0.0% | Held | 2 | SEC ↗ |
| 20 | Tudor Investment Corp Et Al | 222.98K | +33.4% | $5.47M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | D. E. Shaw & Co. ✦ | 211.97K | +32.7% | $5.20M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 22 | Allspring Global Investments… | 160.66K | +0.9% | $3.94M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 23 | Bnp Paribas Financial Markets | 122.16K | -18.6% | $3.00M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Citadel Advisors ✦ | 120.98K | -67.0% | $2.97M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 25 | Franklin Resources Inc | 90.91K | +12.8% | $2.23M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 26 | Bank of New York Mellon Corp | 88.65K | +1.9% | $2.18M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 27 | JPMorgan Chase ✦ | 88.77K | -1.4% | $2.09M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 28 | American Century Companies Inc | 79.11K | +1.7% | $1.94M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 29 | Mackenzie Financial Corp | 74.11K | +98.6% | $1.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 30 | Bank Of America Corp /De/ | 67.81K | -74.2% | $1.66M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 31 | UBS AM, a distinct business unit of… | 64.96K | -6.7% | $1.59M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 32 | AQR Capital Management ✦ | 64.88K | +1.6% | $1.59M | 0.0% | ▲ Add | 6 | SEC ↗ ×7 |
| 33 | Envestnet Asset Management Inc | 61.87K | -0.2% | $1.52M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Invesco Ltd. | 61.01K | -55.0% | $1.50M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 35 | Swiss National Bank | 57.30K | 0.0% | $1.41M | 0.0% | Held | 2 | SEC ↗ |
| 36 | Fidelity (FMR) ✦ | 50.41K | +19.2% | $1.24M | 0.0% | ▲ Add | 4 | SEC ↗ ×3 |
| 37 | UBS Group AG | 49.16K | -65.3% | $1.21M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 38 | Man Group plc | 47.14K | +306.9% | $1.16M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 39 | Quantinno Capital Management LP | 45.48K | +387.3% | $1.12M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Jane Street Group, Llc | 42.56K | -74.8% | $1.04M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 41 | Alliancebernstein L.P. | 25.27K | 0.0% | $983,003 | 0.0% | Held | 2 | SEC ↗ |
| 42 | Rhumbline Advisers | 38.38K | -0.2% | $942,171 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 43 | T. Rowe Price ✦ | 37.79K | +10.7% | $928,000 | 0.0% | ▲ Add | 8 | SEC ↗ |
| 44 | Nomura Holdings Inc | 35.75K | New | $877,613 | 0.0% | New | 1 | SEC ↗ |
| 45 | Sei Investments Co | 35.05K | -11.8% | $860,382 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 46 | Universal- Beteiligungs- und… | 34.39K | +17.1% | $844,201 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Corient Private Wealth LP | 31.87K | New | $782,410 | 0.0% | New | 1 | SEC ↗ |
| 48 | California State Teachers… | 27.51K | -0.8% | $675,444 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 49 | Arrowstreet Capital ✦ | 27.14K | +286.1% | $666,336 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | Barclays Plc | 26.81K | -62.8% | $658,186 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 51 | Deutsche Bank Ag\ | 24.16K | +8.0% | $593,226 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Truist Financial Corp | 23.78K | +0.7% | $583,824 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Legal & General Group Plc | 23.18K | -22.0% | $569,167 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 54 | Hrt Financial Lp | 15.86K | -66.7% | $389,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | Janus Henderson Group Plc | 15.04K | 0.0% | $369,083 | 0.0% | Held | 2 | SEC ↗ |
| 56 | Zurcher Kantonalbank (Zurich… | 15.03K | +27.2% | $368,937 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 13.68K | +3.4% | $335,746 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | Wells Fargo & Company/Mn | 12.89K | -62.3% | $316,499 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 59 | Creative Planning | 12.48K | -22.7% | $306,359 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 60 | Manufacturers Life Insurance… | 12.44K | +46.5% | $305,353 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 61 | Canada Pension Plan Investment Board | 11.40K | +81.0% | $279,870 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 62 | Lido Advisors, LLC | 10.03K | -0.1% | $246,261 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | LPL Financial LLC | 9.70K | -10.8% | $238,135 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | Susquehanna International Group, Llp | 9.52K | New | $233,716 | 0.0% | New | 1 | SEC ↗ |
| 65 | Russell Investments Group, Ltd. | 9.31K | +274.4% | $228,682 | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 66 | Cetera Investment Advisers | 9.21K | +3.1% | $226,056 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 67 | Assetmark, Inc | 5.78K | +9.3% | $141,874 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Citigroup Inc | 4.03K | -87.6% | $98,863 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 69 | Cwm, Llc | 3.01K | +30.8% | $73,896 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Mirae Asset Global Investments Co.… | 1.55K | +9.4% | $38,077 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Federated Hermes, Inc. | 1.25K | +89.2% | $30,663 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Osaic Holdings, Inc. | 857 | -97.7% | $21,039 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 73 | BNP Paribas Asset Management… | 761 | -58.6% | $18,683 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Rockefeller Capital Management L.P. | 433 | +397.7% | $10,630 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 75 | Group One Trading Llc | 292 | New | $7,169 | 0.0% | New | 1 | SEC ↗ |
| 76 | Jones Financial Companies Lllp | 250 | -51.5% | $5,883 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 77 | Pnc Financial Services Group, Inc. | 163 | -70.2% | $4,002 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 78 | Royal Bank Of Canada | 177 | -79.5% | $4,000 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 79 | Us Bancorp \De\ | 92 | +91.7% | $2,258 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Nomura Holdings Inc | $877,613 | 0.0% |
| Corient Private Wealth LP | $782,410 | 0.0% |
| Susquehanna International… | $233,716 | 0.0% |
| Group One Trading Llc | $7,169 | 0.0% |
Exited
| Wellington Management | $8.50M | was 0.0% |
| Point72 Asset Management | $4.65M | was 0.0% |
| Squarepoint Ops LLC | $2.14M | was 0.0% |
| Hsbc Holdings Plc | $1.52M | was 0.0% |
| Ameriprise Financial Inc | $1.38M | was 0.0% |
| State Board Of Administration… | $278,291 | was 0.0% |
| Commonwealth Equity Services… | $256,390 | was 0.0% |
| ProShare Advisors LLC | $251,994 | was 0.0% |
| Pictet Asset Management… | $229,471 | was 0.0% |
| Voya Investment Management Llc | $204,069 | was 0.0% |
| Raymond James Financial Inc | $203,759 | was 0.0% |
| Daiwa Securities Group Inc. | $3,000 | 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)
Oct 12
Juvenal Tobin W
Officer · 3.29K sh · $110,608
Oct 05
MAETZOLD DEREK J
Officer, Director · 2.72K sh · $96,668
Oct 05
MAETZOLD DEREK J
Officer, Director · 3.20K sh · $113,740
Oct 05
MAETZOLD DEREK J
Officer, Director · 8.58K sh · $305,156
Oct 01
Oelschlager Kristen M
Officer · 2.81K sh · $100,350
Oct 01
Oelschlager Kristen M
Officer · 1.35K sh · $48,967
Sep 30
Juvenal Tobin W
Officer · 1.03K sh · $35,363
Sep 29
Juvenal Tobin W
Officer · 5.54K sh · $196,765
Sep 21
MAETZOLD DEREK J
Officer, Director · 2.72K sh · $96,038
Sep 21
MAETZOLD DEREK J
Officer, Director · 3.20K sh · $112,998
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: Q1 2026 ·
Methodology ·
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