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, Q3 2025
Institutional positions in Castle Biosciences Inc as of Sep 30, 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
- 173
- +22 vs. Q2 2025
- Shares held
- 26.6M
- +114.3K (+0.4%) vs. Q2 2025
- Total value
- $608.3M
- +$66.6M (+12.3%) vs. Q2 2025
- New holders
- 37
- 62 more added
- Sold out
- 15
- 53 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| SEI Investments Co | 26,771 | $609.6K | 0.00% | −4,359−14.0% | Reduced |
| Campbell & CO Investment Adviser LLC | 26,996 | $614.7K | 0.05% | +26,996 | New |
| JPMorgan Chase & Co | 27,778 | $632.5K | 0.00% | +1,115+4.2% | Added |
| Perkins Capital Management Inc | 28,145 | $640.9K | 0.56% | +150+0.5% | Added |
| FMR LLC | 28,542 | $649.9K | 0.00% | +4,542+18.9% | Added |
| Dynamic Technology Lab Private Ltd | 29,310 | $667.0K | 0.11% | +29,310 | New |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 29,883 | $680.4K | 0.00% | −24,727−45.3% | Reduced |
| Price T Rowe Associates Inc | 32,593 | $743.0K | 0.00% | +6,186+23.4% | Added |
| HSBC Holdings PLC | 33,233 | $749.0K | 0.00% | −785−2.3% | Reduced |
| Alliancebernstein L.P. | 33,370 | $759.8K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 34,908 | $794.9K | 0.00% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 35,800 | $815.2K | 0.00% | 00.0% | Unchanged |
| Tritonpoint Wealth, LLC | 40,777 | $928.5K | 0.08% | 00.0% | Unchanged |
| Rhumbline Advisers | 43,758 | $996.4K | 0.00% | −1,639−3.6% | Reduced |
| SummitTX Capital, L.P. | 45,000 | $1.02M | 0.04% | +45,000 | New |
| Engineers Gate Manager LP | 46,506 | $1.06M | 0.01% | −20,746−30.8% | Reduced |
| HRT Financial LP | 47,239 | $1.07M | 0.00% | +28,413+150.9% | Added |
| Cubist Systematic Strategies, LLC | 50,304 | $1.15M | 0.02% | +50,304 | New |
| AQR Capital Management LLC | 50,842 | $1.16M | 0.00% | +1,612+3.3% | Added |
| Invesco Ltd. | 55,840 | $1.27M | 0.00% | +15,411+38.1% | Added |
| Swiss National Bank | 56,000 | $1.28M | 0.00% | +1,700+3.1% | Added |
| UBS Asset Management Americas Inc | 57,460 | $1.31M | 0.00% | −45,282−44.1% | Reduced |
| Algert Global LLC | 57,895 | $1.32M | 0.02% | −127,286−68.7% | Reduced |
| Envestnet Asset Management Inc | 66,928 | $1.52M | 0.00% | −3,550−5.0% | Reduced |
| Barclays PLC | 73,068 | $1.66M | 0.00% | −36,675−33.4% | Reduced |
| Brinker Capital Investments, LLC | 76,344 | $1.74M | 0.01% | −188−0.2% | Reduced |
| American Century Companies Inc | 82,512 | $1.88M | 0.00% | +17,240+26.4% | Added |
| Tudor Investment Corp Et Al | 85,435 | $1.95M | 0.01% | +8,981+11.7% | Added |
| Schonfeld Strategic Advisors LLC | 87,691 | $2.00M | 0.01% | +19,765+29.1% | Added |
| D. E. Shaw & Co., Inc. | 92,614 | $2.11M | 0.00% | −55,576−37.5% | Reduced |
| Bank of New York Mellon Corp | 94,016 | $2.14M | 0.00% | +4,133+4.6% | Added |
| Empowered Funds, LLC | 98,180 | $2.24M | 0.02% | +57,430+140.9% | Added |
| Franklin Resources Inc | 99,787 | $2.27M | 0.00% | +540+0.5% | Added |
| Birchview Capital, LP | 110,600 | $2.52M | 1.90% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 139,914 | $3.19M | 0.00% | +40,621+40.9% | Added |
| Allspring Global Investments Holdings, LLC | 156,513 | $3.56M | 0.01% | −4,662−2.9% | Reduced |
| Bridgeway Capital Management, LLC | 177,180 | $4.03M | 0.09% | +136,430+334.8% | Added |
| Trexquant Investment LP | 178,442 | $4.06M | 0.04% | −139,630−43.9% | Reduced |
| Summit Wealth Group LLC | 122,494 | $4.51M | 0.62% | +122,494 | New |
| Qube Research & Technologies Ltd | 220,961 | $5.03M | 0.01% | +28,408+14.8% | Added |
| New York State Common Retirement Fund | 230,046 | $5.24M | 0.01% | +14,216+6.6% | Added |
| Charles Schwab Investment Management Inc | 238,154 | $5.42M | 0.00% | +3,139+1.3% | Added |
| Citadel Advisors LLC | 250,915 | $5.71M | 0.00% | −637,600−71.8% | Reduced |
| Advisors Capital Management, LLC | 254,200 | $5.79M | 0.07% | +8,333+3.4% | Added |
| Ameriprise Financial Inc | 256,233 | $5.83M | 0.00% | −116,234−31.2% | Reduced |
| Morgan Stanley | 269,631 | $6.14M | 0.00% | +102,043+60.9% | Added |
| Kornitzer Capital Management Inc | 278,314 | $6.34M | 0.13% | 00.0% | Unchanged |
| Northern Trust Corp | 282,267 | $6.43M | 0.00% | +2,442+0.9% | Added |
| UBS Group AG | 291,362 | $6.63M | 0.00% | −72,486−19.9% | Reduced |
| Bank of America Corp | 315,370 | $7.18M | 0.00% | −67,375−17.6% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 335,891 | $7.65M | 0.02% | +209,460+165.7% | Added |
| Point72 Asset Management, L.P. | 336,958 | $7.67M | 0.02% | +336,958 | New |
| Goldman Sachs Group Inc | 345,099 | $7.86M | 0.00% | +71,656+26.2% | Added |
| Silvercrest Asset Management Group LLC | 367,888 | $8.38M | 0.06% | +87,929+31.4% | Added |
| Summit Partners Public Asset Management, LLC | 400,000 | $9.11M | 0.30% | +400,000 | New |
| Acadian Asset Management LLC | 451,652 | $10.3M | 0.02% | −92,598−17.0% | Reduced |
| Parkman Healthcare Partners LLC | 475,568 | $10.8M | 1.19% | +123,306+35.0% | Added |
| Schroder Investment Management Group | 494,950 | $11.1M | 0.01% | −153,622−23.7% | Reduced |
| Renaissance Technologies LLC | 562,600 | $12.8M | 0.02% | −107,900−16.1% | Reduced |
| Millennium Management LLC | 575,089 | $13.1M | 0.01% | +146,692+34.2% | Added |
| Palisade Capital Management LLC | 638,656 | $14.5M | 0.40% | +63,540+11.0% | Added |
| Allianz Asset Management GmbH | 648,351 | $14.8M | 0.02% | −65,391−9.2% | Reduced |
| Wasatch Advisors Inc | 669,120 | $15.2M | 0.08% | −380,653−36.3% | Reduced |
| Geode Capital Management, LLC | 698,610 | $15.9M | 0.00% | +8,684+1.3% | Added |
| AIGH Capital Management LLC | 707,287 | $16.1M | 5.64% | +707,287 | New |
| State Street Corp | 724,080 | $16.5M | 0.00% | +16,393+2.3% | Added |
| Braidwell LP | 822,735 | $18.7M | 0.56% | 00.0% | Unchanged |
| Nuveen, LLC | 957,081 | $21.8M | 0.01% | −116,026−10.8% | Reduced |
| Dimensional Fund Advisors LP | 1,474,089 | $33.6M | 0.01% | +96,084+7.0% | Added |
| Portolan Capital Management, LLC | 1,515,111 | $34.5M | 1.87% | +25,539+1.7% | Added |
| Principal Financial Group Inc | 1,794,355 | $40.9M | 0.02% | −4,619−0.3% | Reduced |
| Vanguard Group Inc | 2,172,318 | $49.5M | 0.00% | +2,290+0.1% | Added |
| BlackRock, Inc. | 3,189,896 | $72.6M | 0.00% | +35,217+1.1% | Added |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −407,211−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −125,719−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −78,938−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −46,301−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −44,472−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −21,858−100.0% | Sold out |
| Advantage Alpha Capital Partners LP | 0 | $0 | 0.00% | −16,021−100.0% | Sold out |
| Mount Yale Investment Advisors, LLC | 0 | $0 | 0.00% | −8,362−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −662−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −72−100.0% | Sold out |
| Bryn Mawr Trust Co | 0 | $0 | 0.00% | −46−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| First Horizon Advisors, Inc. | – | – | – | – | Not filed |