Castle Biosciences Inc
CSTL- Exchange
- Nasdaq
- Industry
- Services-Medical Laboratories
- SEC CIK
- 0001447362
In the last 90 days, Castle Biosciences Inc insiders filed 0 open-market purchases and 20 sales; 176 institutions reported holding it in 13F filings for Q2 2026, worth $653.8M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Castle Biosciences Inc as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 195
- +26 vs. Q3 2025
- Shares held
- 27.3M
- +724.4K (+2.7%) vs. Q3 2025
- Total value
- $1.06B
- +$455.1M (+75.0%) vs. Q3 2025
- New holders
- 43
- 64 more added
- Sold out
- 17
- 69 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CSTL on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 176 | $653.8M |
| Q1 2026 | 186 | $677.8M |
| Q4 2025 | 195 | $1.06B |
| Q3 2025 | 173 | $608.3M |
| Q2 2025 | 152 | $541.8M |
| Q1 2025 | 180 | $516.3M |
| Q4 2024 | 197 | $706.4M |
| Q3 2024 | 185 | $736.9M |
| Q2 2024 | 159 | $549.4M |
| Q1 2024 | 151 | $553.2M |
| Q4 2023 | 153 | $515.4M |
| Q3 2023 | 135 | $391.0M |
| Q2 2023 | 130 | $316.6M |
| Q1 2023 | 148 | $501.9M |
| Q4 2022 | 153 | $522.0M |
| Q3 2022 | 157 | $569.8M |
| Q2 2022 | 146 | $495.0M |
| Q1 2022 | 160 | $1.02B |
| Q4 2021 | 159 | $918.6M |
| Q3 2021 | 188 | $1.42B |
| Q2 2021 | 182 | $1.52B |
| Q1 2021 | 175 | $1.46B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| STRS Ohio | 12,600 | $490.1K | 0.00% | +2,800+28.6% | Added |
| Summit Global Investments | 12,365 | $481.0K | 0.03% | +13+0.1% | Added |
| CWM Advisors, LLC | 12,011 | $467.2K | 0.04% | −7,876−39.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 11,810 | $459.4K | 0.00% | −397−3.3% | Reduced |
| Diversify Wealth Management, LLC | 11,588 | $459.3K | 0.02% | −159−1.4% | Reduced |
| Intech Investment Management LLC | 11,718 | $455.8K | 0.00% | −674−5.4% | Reduced |
| Man Group plc | 11,585 | $450.7K | 0.00% | +11,585 | New |
| Jackson Creek Investment Advisors LLC | 11,235 | $437.0K | 0.13% | +11,235 | New |
| Stephens Inc | 11,122 | $432.6K | 0.01% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 10,928 | $425.1K | 0.01% | −10,205−48.3% | Reduced |
| LPL Financial LLC | 10,877 | $423.1K | 0.00% | +1,480+15.7% | Added |
| TritonPoint Partners, LLC | 10,777 | $419.2K | 0.22% | +10,777 | New |
| Aquatic Capital Management LLC | 10,570 | $411.2K | 0.01% | +8,235+352.7% | Added |
| Green Alpha Advisors, LLC | 10,236 | $398.2K | 0.36% | +698+7.3% | Added |
| Quantinno Capital Management LP | 9,332 | $363.0K | 0.00% | +9,332 | New |
| Cetera Investment Advisers | 8,935 | $347.6K | 0.00% | +8,935 | New |
| Simon Quick Advisors, LLC | 8,561 | $333.0K | 0.01% | −5,001−36.9% | Reduced |
| Manufacturers Life Insurance Company, The | 8,487 | $330.1K | 0.00% | −1,052−11.0% | Reduced |
| Glenmede Trust Co NA | 8,190 | $318.6K | 0.00% | +8,190 | New |
| Arizona State Retirement System | 8,071 | $314.0K | 0.00% | +8,071 | New |
| Police & Firemen's Retirement System of New Jersey | 7,829 | $304.5K | 0.00% | 00.0% | Unchanged |
| Intrust Bank NA | 7,378 | $287.0K | 0.02% | +7,378 | New |
| State Board of Administration of Florida Retirement System | 7,154 | $278.3K | 0.00% | +7,154 | New |
| Verdad Advisers, LP | 7,085 | $275.6K | 0.32% | +7,085 | New |
| Arrowstreet Capital, Limited Partnership | 7,029 | $273.4K | 0.00% | +7,029 | New |
| Commonwealth Equity Services, LLC | 6,591 | $256.4K | 0.00% | +6,591 | New |
| ProShare Advisors LLC | 6,478 | $252.0K | 0.00% | +6,478 | New |
| Blueshift Asset Management, LLC | 6,458 | $251.2K | 0.07% | +6,458 | New |
| Capstone Capital Management Ltd | 6,446 | $250.7K | 0.24% | +6,446 | New |
| Canada Pension Plan Investment Board | 6,300 | $245.1K | 0.00% | +3,900+162.5% | Added |
| KLP Kapitalforvaltning AS | 6,200 | $241.2K | 0.00% | −2,700−30.3% | Reduced |
| Cornerstone Investment Partners, LLC | 6,078 | $236.4K | 0.01% | +6,078 | New |
| Portside Wealth Group, LLC | 5,942 | $231.1K | 0.03% | +5,942 | New |
| Pictet Asset Management Holding SA | 5,899 | $229.5K | 0.00% | +5,899 | New |
| Lido Advisors, LLC | 10,036 | $228.5K | 0.00% | 00.0% | Unchanged |
| Jump Financial, LLC | 5,500 | $213.9K | 0.00% | +5,500 | New |
| Assetmark, Inc | 5,287 | $205.7K | 0.00% | −418−7.3% | Reduced |
| Voya Investment Management LLC | 5,246 | $204.1K | 0.00% | +5,246 | New |
| Raymond James Financial Inc | 5,238 | $203.8K | 0.00% | +5,238 | New |
| China Universal Asset Management Co., Ltd. | 4,756 | $185.0K | 0.01% | −329−6.5% | Reduced |
| Globeflex Capital L P | 3,759 | $146.2K | 0.02% | +3,759 | New |
| Farther Finance Advisors, LLC | 3,337 | $129.8K | 0.00% | +1,945+139.7% | Added |
| Great West Life Assurance Co | 3,244 | $126.0K | 0.00% | −7,469−69.7% | Reduced |
| Harbour Investments, Inc. | 3,137 | $122.0K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 3,014 | $117.2K | 0.01% | +3,014 | New |
| Russell Investments Group, Ltd. | 2,488 | $96.8K | 0.00% | −20−0.8% | Reduced |
| Persistent Asset Partners Ltd | 2,463 | $95.8K | 0.05% | +2,463 | New |
| Ameritas Investment Partners, Inc. | 2,373 | $92.3K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 2,302 | $90.0K | 0.00% | +391+20.5% | Added |
| Caitong International Asset Management Co., Ltd | 2,099 | $81.7K | 0.02% | +1,371+188.3% | Added |
| Tower Research Capital LLC (TRC) | 2,013 | $78.3K | 0.00% | −1,653−45.1% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,839 | $72.0K | 0.00% | +1,378+298.9% | Added |
| Sterling Capital Management LLC | 1,637 | $63.7K | 0.00% | −323−16.5% | Reduced |
| State of Alaska, Department of Revenue | 1,553 | $60.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 1,418 | $55.2K | 0.00% | +297+26.5% | Added |
| Global Retirement Partners, LLC | 1,100 | $42.8K | 0.00% | 00.0% | Unchanged |
| Covestor Ltd | 998 | $39.0K | 0.02% | −1,071−51.8% | Reduced |
| Amalgamated Bank | 892 | $35.0K | 0.00% | −1−0.1% | Reduced |
| Kemnay Advisory Services Inc. | 889 | $34.6K | 0.01% | +889 | New |
| Royal Bank of Canada | 865 | $33.0K | 0.00% | −32−3.6% | Reduced |
| First Horizon Corp | 678 | $26.4K | 0.00% | +231+51.7% | Added |
| Federated Hermes, Inc. | 660 | $25.7K | 0.00% | +660 | New |
| GF Fund Management Co. Ltd. | 573 | $22.3K | 0.00% | −51−8.2% | Reduced |
| The PNC Financial Services Group, Inc. | 546 | $21.2K | 0.00% | +431+374.8% | Added |
| Jones Financial Companies LLLP | 515 | $20.0K | 0.00% | +490+1,960.0% | Added |
| Hughes Financial Services, LLC | 436 | $17.0K | 0.00% | +1+0.2% | Added |
| Rossby Financial, LCC | 429 | $16.7K | 0.01% | +47+12.3% | Added |
| Quadrant Capital Group LLC | 336 | $13.1K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 281 | $10.9K | 0.00% | −83−22.8% | Reduced |
| Versant Capital Management, Inc | 181 | $7.04K | 0.00% | 00.0% | Unchanged |
| Aster Capital Management (DIFC) Ltd | 151 | $5.87K | 0.00% | +151 | New |
| Huntington National Bank | 139 | $5.41K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 134 | $5.21K | 0.00% | +11+8.9% | Added |
| BFSG, LLC | 90 | $3.50K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 87 | $3.38K | 0.00% | +87 | New |
| Daiwa Securities Group Inc. | 86 | $3.00K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 53 | $2.06K | 0.00% | −2−3.6% | Reduced |
| SBI Securities Co., Ltd. | 52 | $2.02K | 0.00% | −1−1.9% | Reduced |
| IFP Advisors, Inc | 52 | $2.02K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 52 | $2.02K | 0.00% | 00.0% | Unchanged |
| Spire Wealth Management | 50 | $1.95K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 48 | $1.87K | 0.00% | +22+84.6% | Added |
| Quantbot Technologies LP | 47 | $1.83K | 0.00% | +47 | New |
| Signaturefd, LLC | 45 | $1.75K | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 37 | $1.44K | 0.00% | −537−93.6% | Reduced |
| Allworth Financial LP | 30 | $1.17K | 0.00% | +11+57.9% | Added |
| EverSource Wealth Advisors, LLC | 28 | $1.09K | 0.00% | +8+40.0% | Added |
| Northwestern Mutual Wealth Management Co | 28 | $1.09K | 0.00% | +28 | New |
| Parkside Financial Bank & Trust | 25 | $973 | 0.00% | +25 | New |
| Torren Management, LLC | 21 | $817 | 0.00% | +21 | New |
| Missouri Trust & Investment Co | 19 | $739 | 0.00% | 00.0% | Unchanged |
| Signature Equity Partners, LLC | 16 | $622 | 0.00% | +16 | New |
| True Wealth Design, LLC | 5 | $195 | 0.00% | +4+400.0% | Added |
| Larson Financial Group LLC | 1 | $39 | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 1 | $39 | 0.00% | +1 | New |
| Summit Wealth Group LLC | 0 | $0 | 0.00% | −122,494−100.0% | Sold out |
| Tritonpoint Wealth, LLC | 0 | $0 | 0.00% | −40,777−100.0% | Sold out |
| Healthcare of Ontario Pension Plan Trust Fund | 0 | $0 | 0.00% | −35,800−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −29,310−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −26,996−100.0% | Sold out |