CASTLE BIOSCIENCES INC CSTL
$24.11
-2.4% 52w: $18.15 – $43.04
Latest 13F among current holders filed 21 days ago (Aug 12, 2026)
Price — last 12 months
research preview data18.1530.6043.04
Aug 18, 2025 Jul 2, 2026
Institutional holders
187
-8 QoQ
13F value
$677.8M
-36.2% QoQ
Smart-money holders
5
signal tier ≥ 2
New smart buyers
0
Q1 2026
Options barometer
4.4×
$1.9M calls / $437K puts
Institutional value by quarter
Number of holders
Who owns CSTL?
Q1 2026 filings| Fund | Type | Shares | Value | % of fund | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | Index provider | 3.0M | $73.2M | 0.0% | -3.9% |
| RTW INVESTMENTS, LP ★2 | Fundamental diversified | 2.8M | $67.7M | — | +30.4% |
| PRINCIPAL FINANCIAL GROUP INC | Diversified mechanical | 1.8M | $43.5M | 0.0% | -2.1% |
| Portolan Capital Management, LLC | Other | 1.4M | $33.1M | — | -21.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | Diversified mechanical | 1.2M | $28.9M | — | — |
| DIMENSIONAL FUND ADVISORS LP | Quant stat arb | 1.0M | $25.5M | — | -9.1% |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC ★2 | Fundamental diversified | 940.7K | $23.1M | — | -11.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Diversified mechanical | 861.8K | $21.2M | — | — |
| Allianz Asset Management GmbH | Diversified mechanical | 811.3K | $19.9M | 0.0% | +30.4% |
| STATE STREET CORP | Index provider | 769.1K | $18.9M | 0.0% | +4.4% |
| GEODE CAPITAL MANAGEMENT, LLC | Index provider | 728.1K | $17.9M | — | +1.8% |
| AIGH Capital Management LLC ★2 | Fundamental concentrated | 590.6K | $14.5M | — | -5.5% |
| Qube Research & Technologies Ltd | Quant stat arb | 559.6K | $13.7M | — | +137.6% |
| PALISADE CAPITAL MANAGEMENT, LP | Other | 535.9K | $13.2M | 0.5% | -5.6% |
| RENAISSANCE TECHNOLOGIES LLC | Quant stat arb | 532.8K | $13.1M | — | +8.1% |
| Nuveen, LLC | Diversified mechanical | 522.1K | $12.8M | 0.0% | -0.5% |
| ACADIAN ASSET MANAGEMENT LLC | Quant stat arb | 484.4K | $11.9M | 0.0% | +24.1% |
| WASATCH ADVISORS LP | Other | 455.0K | $11.2M | — | -15.3% |
| MORGAN STANLEY | Bank broker | 428.9K | $10.5M | 0.0% | +110.7% |
| EVENTIDE ASSET MANAGEMENT, LLC | Other | 386.4K | $9.5M | — | +26.7% |
| Connor, Clark & Lunn Investment Management Ltd. | Diversified mechanical | 377.1K | $9.3M | — | -2.9% |
| MILLENNIUM MANAGEMENT LLC | Multistrat pod | 353.3K | $8.7M | 0.0% | +14.4% |
| GOLDMAN SACHS GROUP INC | Bank broker | 341.2K | $8.4M | 0.0% | +18.8% |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Diversified mechanical | 298.9K | $7.0M | 0.0% | -39.3% |
| NORTHERN TRUST CORP | Index provider | 273.1K | $6.7M | 0.0% | +4.1% |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | Other | 268.5K | $6.6M | 0.0% | +31.0% |
| KORNITZER CAPITAL MANAGEMENT INC /KS | Other | 264.4K | $6.5M | 0.1% | -1.2% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Diversified mechanical | 255.2K | $6.3M | — | +3.3% |
| TWO SIGMA INVESTMENTS, LP | Quant stat arb | 248.8K | $6.1M | 0.0% | +196.0% |
| Advisors Capital Management, LLC | Other | 248.4K | $6.1M | 0.1% | -0.9% |
| SG Americas Securities, LLC | Diversified mechanical | 244.9K | $6.0M | 0.0% | +1051.8% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Index provider | 241.9K | $5.9M | — | -0.3% |
| NEW YORK STATE COMMON RETIREMENT FUND | Diversified mechanical | 233.0K | $5.7M | — | Held |
| TUDOR INVESTMENT CORP ET AL | Quant stat arb | 223.0K | $5.5M | 0.0% | +33.4% |
| PANAGORA ASSET MANAGEMENT INC | Diversified mechanical | 222.4K | $5.5M | 0.0% | +383.4% |
| D. E. Shaw & Co., Inc. | Quant stat arb | 212.0K | $5.2M | 0.0% | +32.7% |
| VANGUARD FIDUCIARY TRUST CO | Diversified mechanical | 188.2K | $4.6M | — | — |
| Allspring Global Investments Holdings, LLC | Diversified mechanical | 160.7K | $3.9M | 0.0% | +0.9% |
| Campbell & CO Investment Adviser LLC | Diversified mechanical | 148.8K | $3.7M | — | New |
| Empowered Funds, LLC | Diversified mechanical | 132.2K | $3.2M | 0.0% | +8.4% |
| Trexquant Investment LP | Diversified mechanical | 130.4K | $3.2M | — | +101.9% |
| Parkman Healthcare Partners LLC | Other | 126.2K | $3.1M | — | -16.2% |
| BNP PARIBAS FINANCIAL MARKETS | Bank broker | 122.2K | $3.0M | 0.0% | -18.6% |
| CITADEL ADVISORS LLC | Multistrat pod | 121.0K | $3.0M | 0.0% | -67.0% |
| FRANKLIN RESOURCES INC | Long only active | 90.9K | $2.2M | 0.0% | +12.8% |
| Bank of New York Mellon Corp | Diversified mechanical | 88.7K | $2.2M | 0.0% | +1.9% |
| JPMORGAN CHASE & CO | Bank broker | 88.8K | $2.1M | 0.0% | -1.4% |
| AMERICAN CENTURY COMPANIES INC | Diversified mechanical | 79.1K | $1.9M | — | +1.7% |
| Orion Porfolio Solutions, LLC | Wealth advisor | 74.9K | $1.8M | 0.0% | +0.3% |
| MACKENZIE FINANCIAL CORP | Diversified mechanical | 74.1K | $1.8M | 0.0% | +98.6% |
Exits are not a bearish signal: our backtest shows stocks specialists exit keep outperforming for 3+ quarters — selling usually means profit-taking, not a forecast.
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