Security record
CSTL
Castle Biosciences, Inc. · Healthcare · Medical - Diagnostics & Research
76Tracked holders
-1Δ holders
16.83MShares held
$401.45MReported value
+6New positions
−6Exits
Momentum inputs (comparable managers):
holder breadth -1.3% ·
share flow +4.2% ·
net new positions 0.0%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| 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 | — |
| 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 · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.29M | +10.4% | $78.51M | 0.0% | ▲ Add | 5 | SEC ↗ ×15 |
| 2 | Principal Financial Group Inc | 1.73M | -2.4% | $41.18M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 3 | Vanguard Capital Management Llc | 1.23M | +4.2% | $29.25M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Allianz Asset Management GmbH | 879.26K | +8.4% | $20.97M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 5 | State Street Global Advisors ✦ (passive) | 822.08K | +6.9% | $19.63M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 795.91K | +9.3% | $18.99M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 7 | Mackenzie Financial Corp | 793.51K | +970.7% | $18.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Dimensional Fund Advisors Lp | 791.09K | -23.9% | $18.87M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 9 | Qube Research & Technologies Ltd | 589.30K | +5.3% | $14.05M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 10 | Renaissance Technologies ✦ | 371.20K | -30.3% | $8.85M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 11 | Goldman Sachs Group ✦ | 358.40K | +5.0% | $8.55M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 12 | Point72 Asset Management ✦ | 357.32K | New | $8.52M | 0.0% | New | 1 | SEC ↗ |
| 13 | Connor, Clark & Lunn Investment… | 331.73K | -12.0% | $7.91M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 14 | Morgan Stanley ✦ | 329.68K | -23.1% | $7.86M | 0.0% | ▼ Trim | 4 | SEC ↗ ×7 |
| 15 | Allspring Global Investments… | 292.47K | +82.0% | $6.98M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | Northern Trust Corp | 285.16K | +4.4% | $6.80M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 17 | Citadel Advisors ✦ | 265.35K | +119.3% | $6.33M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 18 | Charles Schwab Investment… | 254.53K | +5.2% | $6.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | New York State Common Retirement… | 234.75K | +0.7% | $5.60M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 20 | Nuveen, LLC | 231.73K | -55.6% | $5.53M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 21 | Millennium Management ✦ | 205.37K | -41.9% | $4.90M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 22 | AQR Capital Management ✦ | 166.57K | +156.7% | $3.97M | 0.0% | ▲ Add | 7 | SEC ↗ ×5 |
| 23 | First Trust Advisors Lp | 145.06K | New | $3.46M | 0.0% | New | 1 | SEC ↗ |
| 24 | Hrt Financial Lp | 115.85K | +630.6% | $2.76M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 112.79K | -46.8% | $2.69M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 26 | Man Group plc | 108.76K | +130.7% | $2.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | Two Sigma Investments ✦ | 100.37K | -59.7% | $2.39M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 28 | Bank Of America Corp /De/ | 98.75K | +45.6% | $2.36M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 29 | Bank of New York Mellon Corp | 98.02K | +10.6% | $2.34M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 30 | Franklin Resources Inc | 97.73K | +7.5% | $2.33M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 31 | Arrowstreet Capital ✦ | 92.74K | +241.7% | $2.21M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | UBS Group AG | 89.37K | +81.8% | $2.13M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 33 | JPMorgan Chase ✦ | 84.80K | -4.5% | $2.06M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 34 | Sei Investments Co | 74.43K | +112.4% | $1.78M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 35 | Bnp Paribas Financial Markets | 69.57K | -43.0% | $1.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 36 | American Century Companies Inc | 65.41K | -17.3% | $1.56M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 37 | UBS AM, a distinct business unit of… | 64.35K | -0.9% | $1.53M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 38 | Norges Bank ✦ (passive) | 60.10K | New | $1.43M | 0.0% | New | 1 | SEC ↗ |
| 39 | Fidelity (FMR) ✦ | 55.87K | +10.8% | $1.33M | 0.0% | ▲ Add | 5 | SEC ↗ ×3 |
| 40 | Envestnet Asset Management Inc | 55.16K | -10.8% | $1.32M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 41 | Invesco Ltd. | 54.89K | -10.0% | $1.31M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 42 | Swiss National Bank | 53.70K | -6.3% | $1.28M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 43 | T. Rowe Price ✦ | 53.24K | +40.9% | $1.27M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 44 | Jane Street Group, Llc | 44.79K | +5.2% | $1.07M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 45 | Rhumbline Advisers | 39.01K | +1.6% | $930,379 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 46 | Russell Investments Group, Ltd. | 31.68K | +240.1% | $761,446 | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 47 | Barclays Plc | 30.33K | +13.1% | $723,371 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 48 | Deutsche Bank Ag\ | 30.14K | +24.7% | $718,815 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 49 | Wells Fargo & Company/Mn | 29.54K | +129.2% | $704,602 | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 50 | Alliancebernstein L.P. | 27.10K | +7.2% | $665,305 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 51 | Universal- Beteiligungs- und… | 25.22K | -26.7% | $601,521 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Truist Financial Corp | 23.79K | 0.0% | $567,296 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Tidal Investments LLC | 22.19K | New | $529,136 | 0.0% | New | 1 | SEC ↗ |
| 54 | Legal & General Group Plc | 20.55K | -11.4% | $490,071 | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 55 | Quantinno Capital Management LP | 16.43K | -63.9% | $391,808 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 56 | Citigroup Inc | 16.14K | +300.9% | $385,035 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 57 | Zurcher Kantonalbank (Zurich… | 15.58K | +3.7% | $371,559 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 58 | Tudor Investment Corp Et Al | 14.46K | -93.5% | $344,919 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | LPL Financial LLC | 14.22K | +46.6% | $339,147 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 13.79K | +0.8% | $328,772 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | Creative Planning | 13.68K | +9.6% | $326,292 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | Manufacturers Life Insurance… | 12.54K | +0.8% | $299,151 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 63 | Lido Advisors, LLC | 10.03K | 0.0% | $239,311 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Cetera Investment Advisers | 8.63K | -6.3% | $205,873 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Assetmark, Inc | 6.71K | +16.1% | $160,034 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 66 | Us Bancorp \De\ | 4.48K | +4767.4% | $106,800 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 67 | Mirae Asset Global Investments Co.… | 1.36K | -12.6% | $32,341 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 68 | Osaic Holdings, Inc. | 1.19K | +39.0% | $28,405 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 69 | Royal Bank Of Canada | 976 | +451.4% | $23,000 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 70 | BNP Paribas Asset Management… | 707 | -7.1% | $16,862 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 71 | Federated Hermes, Inc. | 489 | -60.9% | $11,663 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 72 | Jones Financial Companies Lllp | 343 | +37.2% | $8,335 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 73 | National Bank Of Canada /Fi/ | 191 | New | $4,546 | 0.0% | New | 1 | SEC ↗ |
| 74 | Optiver Holding B.V. | 174 | New | $4,150 | 0.0% | New | 1 | SEC ↗ |
| 75 | Pnc Financial Services Group, Inc. | 157 | -3.7% | $3,744 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 76 | Rockefeller Capital Management L.P. | 87 | -79.9% | $2,075 | 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 | $8.52M | 0.0% |
| First Trust Advisors Lp | $3.46M | 0.0% |
| Norges Bank | $1.43M | 0.0% |
| Tidal Investments LLC | $529,136 | 0.0% |
| National Bank Of Canada /Fi/ | $4,546 | 0.0% |
| Optiver Holding B.V. | $4,150 | 0.0% |
Exited
| Schroder Investment… | $7.04M | was 0.0% |
| Nomura Holdings Inc | $877,613 | was 0.0% |
| Corient Private Wealth LP | $782,410 | was 0.0% |
| Canada Pension Plan… | $279,870 | was 0.0% |
| Susquehanna International… | $233,716 | was 0.0% |
| Group One Trading Llc | $7,169 | 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 05
MAETZOLD DEREK J
Officer, Director · 3.20K sh · $113,740
Oct 05
MAETZOLD DEREK J
Officer, Director · 8.58K sh · $305,156
Oct 05
MAETZOLD DEREK J
Officer, Director · 2.72K sh · $96,668
Oct 01
Oelschlager Kristen M
Officer · 1.35K sh · $48,967
Oct 01
Oelschlager Kristen M
Officer · 2.81K sh · $100,350
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 · 8.58K sh · $303,166
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: Q2 2026 ·
Methodology ·
Get this via the API