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, Q2 2025
Institutional positions in Castle Biosciences Inc as of Jun 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
- 152
- −26 vs. Q1 2025
- Shares held
- 26.5M
- +744.7K (+2.9%) vs. Q1 2025
- Total value
- $541.8M
- +$27.1M (+5.3%) vs. Q1 2025
- New holders
- 16
- 69 more added
- Sold out
- 42
- 45 more reduced
2 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,154,679 | $64.4M | 0.00% | +171,139+5.7% | Added |
| Vanguard Group Inc | 2,170,028 | $44.3M | 0.00% | +122,463+6.0% | Added |
| Principal Financial Group Inc | 1,798,974 | $36.7M | 0.02% | +331,101+22.6% | Added |
| Portolan Capital Management, LLC | 1,489,572 | $30.4M | 1.91% | +224,349+17.7% | Added |
| Dimensional Fund Advisors LP | 1,378,005 | $28.1M | 0.01% | +177,783+14.8% | Added |
| Nuveen, LLC | 1,073,107 | $21.9M | 0.01% | +401,296+59.7% | Added |
| Wasatch Advisors Inc | 1,049,773 | $21.4M | 0.11% | +51,318+5.1% | Added |
| Citadel Advisors LLC | 888,515 | $18.1M | 0.02% | +630,133+243.9% | Added |
| Braidwell LP | 822,735 | $16.8M | 0.57% | +457,488+125.3% | Added |
| Allianz Asset Management GmbH | 713,742 | $14.6M | 0.02% | +74,265+11.6% | Added |
| State Street Corp | 707,687 | $14.5M | 0.00% | −7,341−1.0% | Reduced |
| Geode Capital Management, LLC | 689,926 | $14.1M | 0.00% | +40,073+6.2% | Added |
| Renaissance Technologies LLC | 670,500 | $13.7M | 0.02% | −30,700−4.4% | Reduced |
| Schroder Investment Management Group | 648,572 | $13.2M | 0.01% | +51,483+8.6% | Added |
| Palisade Capital Management LLC | 575,116 | $11.7M | 0.33% | +85,148+17.4% | Added |
| Acadian Asset Management LLC | 544,250 | $11.1M | 0.02% | −131,816−19.5% | Reduced |
| Millennium Management LLC | 428,397 | $8.75M | 0.01% | +173,648+68.2% | Added |
| Wellington Management Group LLP | 407,211 | $8.32M | 0.00% | −421,317−50.9% | Reduced |
| Bank of America Corp | 382,745 | $7.82M | 0.00% | +7,365+2.0% | Added |
| Ameriprise Financial Inc | 372,467 | $7.61M | 0.00% | +46,770+14.4% | Added |
| UBS Group AG | 363,848 | $7.43M | 0.00% | +315,089+646.2% | Added |
| Parkman Healthcare Partners LLC | 352,262 | $7.19M | 0.83% | +1,711+0.5% | Added |
| Trexquant Investment LP | 318,072 | $6.50M | 0.07% | +69,081+27.7% | Added |
| Silvercrest Asset Management Group LLC | 279,959 | $5.72M | 0.04% | +81,157+40.8% | Added |
| Northern Trust Corp | 279,825 | $5.71M | 0.00% | +6,356+2.3% | Added |
| Kornitzer Capital Management Inc | 278,314 | $5.68M | 0.11% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 273,443 | $5.58M | 0.00% | +98,118+56.0% | Added |
| Advisors Capital Management, LLC | 245,867 | $5.02M | 0.07% | +44,180+21.9% | Added |
| Charles Schwab Investment Management Inc | 235,015 | $4.80M | 0.00% | −7,243−3.0% | Reduced |
| New York State Common Retirement Fund | 215,830 | $4.41M | 0.01% | +52,671+32.3% | Added |
| Qube Research & Technologies Ltd | 192,553 | $3.93M | 0.01% | −86,811−31.1% | Reduced |
| Algert Global LLC | 185,181 | $3.78M | 0.08% | +40,870+28.3% | Added |
| Morgan Stanley | 167,588 | $3.42M | 0.00% | −44,205−20.9% | Reduced |
| Allspring Global Investments Holdings, LLC | 161,175 | $3.29M | 0.01% | −56,619−26.0% | Reduced |
| D. E. Shaw & Co., Inc. | 148,190 | $3.03M | 0.00% | −40,987−21.7% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 126,431 | $2.58M | 0.01% | −50,458−28.5% | Reduced |
| Squarepoint Ops LLC | 125,719 | $2.57M | 0.01% | +28,359+29.1% | Added |
| Birchview Capital, LP | 110,600 | $2.26M | 2.24% | +22,196+25.1% | Added |
| Barclays PLC | 109,743 | $2.24M | 0.00% | +66,928+156.3% | Added |
| UBS Asset Management Americas Inc | 102,742 | $2.10M | 0.00% | +34,711+51.0% | Added |
| BNP Paribas Arbitrage, SA | 99,293 | $2.03M | 0.00% | +54,063+119.5% | Added |
| Franklin Resources Inc | 99,247 | $2.03M | 0.00% | +161+0.2% | Added |
| Bank of New York Mellon Corp | 89,883 | $1.84M | 0.00% | +5,842+7.0% | Added |
| Y-Intercept (Hong Kong) Ltd | 78,938 | $1.61M | 0.04% | +78,938 | New |
| Brinker Capital Investments, LLC | 76,532 | $1.56M | 0.01% | −1,877−2.4% | Reduced |
| Tudor Investment Corp Et Al | 76,454 | $1.56M | 0.01% | −94,928−55.4% | Reduced |
| Envestnet Asset Management Inc | 70,478 | $1.44M | 0.00% | +707+1.0% | Added |
| Schonfeld Strategic Advisors LLC | 67,926 | $1.39M | 0.01% | +8,255+13.8% | Added |
| Engineers Gate Manager LP | 67,252 | $1.37M | 0.02% | +14,329+27.1% | Added |
| American Century Companies Inc | 65,272 | $1.33M | 0.00% | −8,795−11.9% | Reduced |
| Deutsche Bank AG | 61,743 | $1.26M | 0.00% | −3,794−5.8% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 54,610 | $1.12M | 0.00% | +42,857+364.6% | Added |
| Swiss National Bank | 54,300 | $1.11M | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 49,230 | $1.01M | 0.00% | −87,792−64.1% | Reduced |
| XTX Topco Ltd | 46,301 | $945.5K | 0.04% | +26,673+135.9% | Added |
| Rhumbline Advisers | 45,397 | $927.0K | 0.00% | +6,211+15.9% | Added |
| Nebula Research & Development LLC | 44,472 | $908.1K | 0.08% | +6,855+18.2% | Added |
| Susquehanna International Group, LLP | 42,853 | $875.1K | 0.00% | +6,952+19.4% | Added |
| Graham Capital Management, L.P. | 41,783 | $853.2K | 0.03% | −26,602−38.9% | Reduced |
| Brevan Howard Capital Management LP | 41,301 | $843.4K | 0.01% | +29,096+238.4% | Added |
| Tritonpoint Wealth, LLC | 40,777 | $832.7K | 0.08% | −860−2.1% | Reduced |
| Bridgeway Capital Management, LLC | 40,750 | $832.1K | 0.02% | +40,750 | New |
| Empowered Funds, LLC | 40,750 | $832.1K | 0.01% | +40,750 | New |
| Invesco Ltd. | 40,429 | $825.6K | 0.00% | +8,178+25.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 35,800 | $731.0K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 34,908 | $712.8K | 0.00% | +8,992+34.7% | Added |
| HSBC Holdings PLC | 34,018 | $690.7K | 0.00% | +14,391+73.3% | Added |
| Alliancebernstein L.P. | 33,370 | $681.4K | 0.00% | 00.0% | Unchanged |
| Verition Fund Management LLC | 31,539 | $644.0K | 0.00% | +868+2.8% | Added |
| SEI Investments Co | 31,130 | $635.7K | 0.00% | −41,929−57.4% | Reduced |
| Two Sigma Investments, LP | 28,241 | $576.7K | 0.00% | −111,544−79.8% | Reduced |
| Perkins Capital Management Inc | 27,995 | $571.7K | 0.57% | −5,970−17.6% | Reduced |
| Parallel Advisors, LLC | 27,893 | $569.6K | 0.01% | +300+1.1% | Added |
| JPMorgan Chase & Co | 26,663 | $544.5K | 0.00% | −3,914−12.8% | Reduced |
| Price T Rowe Associates Inc | 26,407 | $540.0K | 0.00% | +2,702+11.4% | Added |
| California State Teachers Retirement System | 24,620 | $502.7K | 0.00% | 00.0% | Unchanged |
| Mackenzie Financial Corp | 24,204 | $494.2K | 0.00% | −3,256−11.9% | Reduced |
| Truist Financial Corp | 24,023 | $490.6K | 0.00% | +1,715+7.7% | Added |
| FMR LLC | 24,000 | $490.1K | 0.00% | +22,844+1,976.1% | Added |
| Jump Financial, LLC | 21,858 | $446.3K | 0.01% | +21,858 | New |
| Harbor Capital Advisors, Inc. | 20,399 | $417.0K | 0.02% | +3,804+22.9% | Added |
| Wells Fargo & Company | 20,300 | $414.5K | 0.00% | +3,953+24.2% | Added |
| First Bank & Trust | 19,951 | $407.4K | 0.07% | +4,815+31.8% | Added |
| Aquatic Capital Management LLC | 19,280 | $393.7K | 0.01% | +19,280 | New |
| CWM Advisors, LLC | 19,117 | $390.4K | 0.04% | +1,964+11.4% | Added |
| HRT Financial LP | 18,826 | $384.0K | 0.00% | −9,459−33.4% | Reduced |
| Oak Harvest Investment Services | 16,883 | $344.8K | 0.04% | 00.0% | Unchanged |
| Advantage Alpha Capital Partners LP | 16,021 | $327.1K | 0.09% | −3,784−19.1% | Reduced |
| MetLife Investment Management | 15,881 | $324.3K | 0.00% | +152+1.0% | Added |
| Summit Global Investments | 15,649 | $320.0K | 0.02% | −14,991−48.9% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 15,561 | $317.8K | 0.00% | +120+0.8% | Added |
| Citigroup Inc | 14,072 | $287.4K | 0.00% | −48,629−77.6% | Reduced |
| Simon Quick Advisors, LLC | 13,562 | $276.9K | 0.01% | −33−0.2% | Reduced |
| Intech Investment Management LLC | 12,289 | $250.9K | 0.00% | −3,789−23.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 12,089 | $246.9K | 0.00% | +8+0.1% | Added |
| Two Sigma Advisers, LP | 12,000 | $245.0K | 0.00% | −57,200−82.7% | Reduced |
| STRS Ohio | 11,700 | $238.9K | 0.00% | −6,600−36.1% | Reduced |
| Diversify Wealth Management, LLC | 12,322 | $238.3K | 0.01% | −780−6.0% | Reduced |
| Stephens Inc | 11,386 | $232.5K | 0.00% | −2,253−16.5% | Reduced |
| Creative Planning | 11,111 | $226.9K | 0.00% | +11+0.1% | Added |