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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,189,896 | $72.6M | 0.00% | +35,217+1.1% | Added |
| Vanguard Group Inc | 2,172,318 | $49.5M | 0.00% | +2,290+0.1% | Added |
| Principal Financial Group Inc | 1,794,355 | $40.9M | 0.02% | −4,619−0.3% | Reduced |
| Portolan Capital Management, LLC | 1,515,111 | $34.5M | 1.87% | +25,539+1.7% | Added |
| Dimensional Fund Advisors LP | 1,474,089 | $33.6M | 0.01% | +96,084+7.0% | Added |
| Nuveen, LLC | 957,081 | $21.8M | 0.01% | −116,026−10.8% | Reduced |
| Braidwell LP | 822,735 | $18.7M | 0.56% | 00.0% | Unchanged |
| State Street Corp | 724,080 | $16.5M | 0.00% | +16,393+2.3% | Added |
| AIGH Capital Management LLC | 707,287 | $16.1M | 5.64% | +707,287 | New |
| Geode Capital Management, LLC | 698,610 | $15.9M | 0.00% | +8,684+1.3% | Added |
| Wasatch Advisors Inc | 669,120 | $15.2M | 0.08% | −380,653−36.3% | Reduced |
| Allianz Asset Management GmbH | 648,351 | $14.8M | 0.02% | −65,391−9.2% | Reduced |
| Palisade Capital Management LLC | 638,656 | $14.5M | 0.40% | +63,540+11.0% | Added |
| Millennium Management LLC | 575,089 | $13.1M | 0.01% | +146,692+34.2% | Added |
| Renaissance Technologies LLC | 562,600 | $12.8M | 0.02% | −107,900−16.1% | Reduced |
| Schroder Investment Management Group | 494,950 | $11.1M | 0.01% | −153,622−23.7% | Reduced |
| Parkman Healthcare Partners LLC | 475,568 | $10.8M | 1.19% | +123,306+35.0% | Added |
| Acadian Asset Management LLC | 451,652 | $10.3M | 0.02% | −92,598−17.0% | Reduced |
| Summit Partners Public Asset Management, LLC | 400,000 | $9.11M | 0.30% | +400,000 | New |
| Silvercrest Asset Management Group LLC | 367,888 | $8.38M | 0.06% | +87,929+31.4% | Added |
| Goldman Sachs Group Inc | 345,099 | $7.86M | 0.00% | +71,656+26.2% | Added |
| Point72 Asset Management, L.P. | 336,958 | $7.67M | 0.02% | +336,958 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 335,891 | $7.65M | 0.02% | +209,460+165.7% | Added |
| Bank of America Corp | 315,370 | $7.18M | 0.00% | −67,375−17.6% | Reduced |
| UBS Group AG | 291,362 | $6.63M | 0.00% | −72,486−19.9% | Reduced |
| Northern Trust Corp | 282,267 | $6.43M | 0.00% | +2,442+0.9% | Added |
| Kornitzer Capital Management Inc | 278,314 | $6.34M | 0.13% | 00.0% | Unchanged |
| Morgan Stanley | 269,631 | $6.14M | 0.00% | +102,043+60.9% | Added |
| Ameriprise Financial Inc | 256,233 | $5.83M | 0.00% | −116,234−31.2% | Reduced |
| Advisors Capital Management, LLC | 254,200 | $5.79M | 0.07% | +8,333+3.4% | Added |
| Citadel Advisors LLC | 250,915 | $5.71M | 0.00% | −637,600−71.8% | Reduced |
| Charles Schwab Investment Management Inc | 238,154 | $5.42M | 0.00% | +3,139+1.3% | Added |
| New York State Common Retirement Fund | 230,046 | $5.24M | 0.01% | +14,216+6.6% | Added |
| Qube Research & Technologies Ltd | 220,961 | $5.03M | 0.01% | +28,408+14.8% | Added |
| Summit Wealth Group LLC | 122,494 | $4.51M | 0.62% | +122,494 | New |
| Trexquant Investment LP | 178,442 | $4.06M | 0.04% | −139,630−43.9% | Reduced |
| Bridgeway Capital Management, LLC | 177,180 | $4.03M | 0.09% | +136,430+334.8% | Added |
| Allspring Global Investments Holdings, LLC | 156,513 | $3.56M | 0.01% | −4,662−2.9% | Reduced |
| BNP Paribas Arbitrage, SA | 139,914 | $3.19M | 0.00% | +40,621+40.9% | Added |
| Birchview Capital, LP | 110,600 | $2.52M | 1.90% | 00.0% | Unchanged |
| Franklin Resources Inc | 99,787 | $2.27M | 0.00% | +540+0.5% | Added |
| Empowered Funds, LLC | 98,180 | $2.24M | 0.02% | +57,430+140.9% | Added |
| Bank of New York Mellon Corp | 94,016 | $2.14M | 0.00% | +4,133+4.6% | Added |
| D. E. Shaw & Co., Inc. | 92,614 | $2.11M | 0.00% | −55,576−37.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 87,691 | $2.00M | 0.01% | +19,765+29.1% | Added |
| Tudor Investment Corp Et Al | 85,435 | $1.95M | 0.01% | +8,981+11.7% | Added |
| American Century Companies Inc | 82,512 | $1.88M | 0.00% | +17,240+26.4% | Added |
| Brinker Capital Investments, LLC | 76,344 | $1.74M | 0.01% | −188−0.2% | Reduced |
| Barclays PLC | 73,068 | $1.66M | 0.00% | −36,675−33.4% | Reduced |
| Envestnet Asset Management Inc | 66,928 | $1.52M | 0.00% | −3,550−5.0% | Reduced |
| Algert Global LLC | 57,895 | $1.32M | 0.02% | −127,286−68.7% | Reduced |
| UBS Asset Management Americas Inc | 57,460 | $1.31M | 0.00% | −45,282−44.1% | Reduced |
| Swiss National Bank | 56,000 | $1.28M | 0.00% | +1,700+3.1% | Added |
| Invesco Ltd. | 55,840 | $1.27M | 0.00% | +15,411+38.1% | Added |
| AQR Capital Management LLC | 50,842 | $1.16M | 0.00% | +1,612+3.3% | Added |
| Cubist Systematic Strategies, LLC | 50,304 | $1.15M | 0.02% | +50,304 | New |
| HRT Financial LP | 47,239 | $1.07M | 0.00% | +28,413+150.9% | Added |
| Engineers Gate Manager LP | 46,506 | $1.06M | 0.01% | −20,746−30.8% | Reduced |
| SummitTX Capital, L.P. | 45,000 | $1.02M | 0.04% | +45,000 | New |
| Rhumbline Advisers | 43,758 | $996.4K | 0.00% | −1,639−3.6% | Reduced |
| Tritonpoint Wealth, LLC | 40,777 | $928.5K | 0.08% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 35,800 | $815.2K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 34,908 | $794.9K | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 33,370 | $759.8K | 0.00% | 00.0% | Unchanged |
| HSBC Holdings PLC | 33,233 | $749.0K | 0.00% | −785−2.3% | Reduced |
| Price T Rowe Associates Inc | 32,593 | $743.0K | 0.00% | +6,186+23.4% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 29,883 | $680.4K | 0.00% | −24,727−45.3% | Reduced |
| Dynamic Technology Lab Private Ltd | 29,310 | $667.0K | 0.11% | +29,310 | New |
| FMR LLC | 28,542 | $649.9K | 0.00% | +4,542+18.9% | Added |
| Perkins Capital Management Inc | 28,145 | $640.9K | 0.56% | +150+0.5% | Added |
| JPMorgan Chase & Co | 27,778 | $632.5K | 0.00% | +1,115+4.2% | Added |
| Campbell & CO Investment Adviser LLC | 26,996 | $614.7K | 0.05% | +26,996 | New |
| SEI Investments Co | 26,771 | $609.6K | 0.00% | −4,359−14.0% | Reduced |
| Two Sigma Investments, LP | 25,700 | $585.2K | 0.00% | −2,541−9.0% | Reduced |
| California State Teachers Retirement System | 24,622 | $560.6K | 0.00% | +20.0% | Added |
| Susquehanna International Group, LLP | 24,225 | $551.6K | 0.00% | −18,628−43.5% | Reduced |
| Mackenzie Financial Corp | 24,204 | $551.1K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 24,121 | $549.2K | 0.00% | +24,121 | New |
| Wells Fargo & Company | 23,979 | $546.0K | 0.00% | +3,679+18.1% | Added |
| Truist Financial Corp | 23,371 | $532.2K | 0.00% | −652−2.7% | Reduced |
| Jane Street Group, LLC | 22,884 | $521.1K | 0.00% | +22,884 | New |
| Panagora Asset Management Inc | 21,398 | $487.2K | 0.00% | +21,398 | New |
| Graham Capital Management, L.P. | 21,133 | $481.2K | 0.02% | −20,650−49.4% | Reduced |
| CWM Advisors, LLC | 19,887 | $452.8K | 0.04% | +770+4.0% | Added |
| First Bank & Trust | 19,799 | $450.8K | 0.08% | −152−0.8% | Reduced |
| Brevan Howard Capital Management LP | 19,128 | $435.5K | 0.01% | −22,173−53.7% | Reduced |
| Parallel Advisors, LLC | 17,786 | $405.0K | 0.01% | −10,107−36.2% | Reduced |
| Oak Harvest Investment Services | 16,883 | $384.4K | 0.04% | 00.0% | Unchanged |
| Capstone Investment Advisors, LLC | 16,677 | $379.7K | 0.00% | +16,677 | New |
| Deutsche Bank AG | 16,642 | $378.9K | 0.00% | −45,101−73.0% | Reduced |
| Creative Planning | 16,276 | $370.6K | 0.00% | +5,165+46.5% | Added |
| MetLife Investment Management | 15,881 | $361.6K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 15,642 | $356.2K | 0.00% | −15,897−50.4% | Reduced |
| Quest Partners LLC | 14,544 | $331.2K | 0.02% | +12,449+594.2% | Added |
| Fox Run Management, L.L.C. | 13,820 | $314.7K | 0.05% | +13,820 | New |
| Simon Quick Advisors, LLC | 13,562 | $308.8K | 0.01% | 00.0% | Unchanged |
| Diversify Wealth Management, LLC | 11,747 | $305.3K | 0.02% | −575−4.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 13,273 | $302.2K | 0.00% | −2,288−14.7% | Reduced |
| Harbor Capital Advisors, Inc. | 13,171 | $300.0K | 0.02% | −7,228−35.4% | Reduced |
| SG Americas Securities, LLC | 13,061 | $297.0K | 0.00% | +13,061 | New |