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 2026
Institutional positions in Castle Biosciences Inc as of Jun 30, 2026. 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
- 176
- −7 vs. Q1 2026
- Shares held
- 27.4M
- −182.5K (−0.7%) vs. Q1 2026
- Total value
- $653.8M
- −$23.5M (−3.5%) vs. Q1 2026
- New holders
- 23
- 80 more added
- Sold out
- 30
- 56 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Castle Biosciences Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Fortitude Family Office, LLC | 1 | $24 | 0.00% | +1 | New |
| Freestone Grove Partners LP | 1 | $24 | 0.00% | +1 | New |
| Caitong International Asset Management Co., Ltd | 6 | $143 | 0.00% | +6 | New |
| Smartleaf Asset Management LLC | 8 | $213 | 0.00% | 00.0% | Unchanged |
| SJS Investment Consulting Inc. | 15 | $358 | 0.00% | −4−21.1% | Reduced |
| Investors Portfolio Services LLC | 18 | $429 | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 19 | $453 | 0.00% | −27−58.7% | Reduced |
| Parkside Financial Bank & Trust | 25 | $596 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 42 | $1.00K | 0.00% | +40+2,000.0% | Added |
| SBI Securities Co., Ltd. | 47 | $1.12K | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 48 | $1.15K | 0.00% | +48 | New |
| Spire Wealth Management | 50 | $1.19K | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 54 | $1.29K | 0.00% | −4−6.9% | Reduced |
| IFP Advisors, Inc | 60 | $1.43K | 0.00% | +8+15.4% | Added |
| Rockefeller Capital Management L.P. | 87 | $2.08K | 0.00% | −346−79.9% | Reduced |
| BFSG, LLC | 90 | $2.15K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 126 | $3.00K | 0.00% | −120−48.8% | Reduced |
| Huntington National Bank | 139 | $3.31K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 139 | $3.31K | 0.00% | +119+595.0% | Added |
| Silver Grove Financial Group, Inc. | 156 | $3.72K | 0.00% | +156 | New |
| The PNC Financial Services Group, Inc. | 157 | $3.74K | 0.00% | −6−3.7% | Reduced |
| Los Angeles Capital Management LLC | 171 | $4.08K | 0.00% | −12,557−98.7% | Reduced |
| Optiver Holding B.V. | 174 | $4.15K | 0.00% | +174 | New |
| Essential Partners LLC | 190 | $4.53K | 0.00% | +61+47.3% | Added |
| National Bank of Canada | 191 | $4.55K | 0.00% | +191 | New |
| Nisa Investment Advisors, LLC | 256 | $6.11K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 264 | $6.30K | 0.00% | +201+319.0% | Added |
| Jones Financial Companies LLLP | 343 | $8.34K | 0.00% | +93+37.2% | Added |
| Rossby Financial, LCC | 429 | $10.2K | 0.00% | 00.0% | Unchanged |
| Hughes Financial Services, LLC | 436 | $10.4K | 0.00% | −10−2.2% | Reduced |
| Covestor Ltd | 473 | $11.0K | 0.01% | −623−56.8% | Reduced |
| Federated Hermes, Inc. | 489 | $11.7K | 0.00% | −760−60.8% | Reduced |
| Nykredit A/S | 597 | $14.2K | 0.00% | +597 | New |
| Sterling Capital Management LLC | 603 | $14.4K | 0.00% | −368−37.9% | Reduced |
| GF Fund Management Co. Ltd. | 631 | $15.0K | 0.00% | −17−2.6% | Reduced |
| First Horizon Corp | 662 | $15.8K | 0.00% | +75+12.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 707 | $16.9K | 0.00% | −54−7.1% | Reduced |
| SRS Capital Advisors, Inc. | 786 | $18.7K | 0.00% | +782+19,550.0% | Added |
| GWM Advisors LLC | 842 | $20.1K | 0.00% | +842 | New |
| Royal Bank of Canada | 976 | $23.0K | 0.00% | +799+451.4% | Added |
| Meeder Asset Management Inc | 994 | $23.7K | 0.00% | +607+156.8% | Added |
| Global Retirement Partners, LLC | 1,100 | $26.2K | 0.00% | +1,100 | New |
| Advisor Group Holdings, Inc. | 1,191 | $28.4K | 0.00% | +334+39.0% | Added |
| Mirae Asset Global Investments Co., Ltd. | 1,356 | $32.3K | 0.00% | −195−12.6% | Reduced |
| State of Alaska, Department of Revenue | 1,553 | $37.0K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 1,806 | $43.1K | 0.00% | −582−24.4% | Reduced |
| Quantbot Technologies LP | 2,599 | $62.0K | 0.00% | −19,461−88.2% | Reduced |
| Ameritas Investment Partners, Inc. | 2,717 | $64.8K | 0.00% | +344+14.5% | Added |
| Tower Research Capital LLC (TRC) | 2,773 | $66.1K | 0.00% | +1,169+72.9% | Added |
| Great West Life Assurance Co | 3,244 | $77.0K | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 3,977 | $94.9K | 0.00% | +729+22.4% | Added |
| US Bancorp | 4,478 | $106.8K | 0.00% | +4,386+4,767.4% | Added |
| China Universal Asset Management Co., Ltd. | 4,827 | $115.1K | 0.01% | −449−8.5% | Reduced |
| State of Wyoming | 4,923 | $117.4K | 0.01% | −4,599−48.3% | Reduced |
| KLP Kapitalforvaltning AS | 6,200 | $147.9K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 6,710 | $160.0K | 0.00% | +931+16.1% | Added |
| Vanguard Investments Australia, Ltd. | 7,553 | $180.1K | 0.00% | 00.0% | Unchanged |
| Glenmede Trust Co NA | 8,536 | $203.6K | 0.00% | +368+4.5% | Added |
| Simon Quick Advisors, LLC | 8,561 | $204.2K | 0.01% | 00.0% | Unchanged |
| Intech Investment Management LLC | 8,580 | $204.6K | 0.00% | +8,580 | New |
| Cetera Investment Advisers | 8,632 | $205.9K | 0.00% | −576−6.3% | Reduced |
| EntryPoint Capital, LLC | 8,942 | $213.3K | 0.05% | +8,942 | New |
| Allstate Corp | 9,642 | $230.0K | 0.00% | +9,642 | New |
| Police & Firemen's Retirement System of New Jersey | 9,855 | $235.0K | 0.00% | +2,026+25.9% | Added |
| Green Alpha Advisors, LLC | 9,941 | $237.1K | 0.16% | −40.0% | Reduced |
| Lido Advisors, LLC | 10,034 | $239.3K | 0.00% | +30.0% | Added |
| Quadrature Capital Ltd | 10,175 | $242.7K | 0.00% | +10,175 | New |
| Numerai GP LLC | 10,348 | $246.8K | 0.02% | +2,041+24.6% | Added |
| TritonPoint Partners, LLC | 10,796 | $257.5K | 0.02% | +19+0.2% | Added |
| Vanguard Global Advisers, LLC | 11,502 | $274.3K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 12,543 | $299.2K | 0.00% | +105+0.8% | Added |
| Parallel Advisors, LLC | 12,931 | $308.4K | 0.00% | −370−2.8% | Reduced |
| Birchview Capital, LP | 12,984 | $309.7K | 0.14% | +84+0.7% | Added |
| Summit Global Investments | 13,078 | $312.0K | 0.02% | −640−4.7% | Reduced |
| Oak Harvest Investment Services | 13,485 | $321.6K | 0.03% | 00.0% | Unchanged |
| Creative Planning | 13,681 | $326.3K | 0.00% | +1,202+9.6% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 13,785 | $328.8K | 0.00% | +109+0.8% | Added |
| LPL Financial LLC | 14,220 | $339.1K | 0.00% | +4,520+46.6% | Added |
| Tudor Investment Corp Et Al | 14,462 | $344.9K | 0.00% | −208,520−93.5% | Reduced |
| Jupiter Topco LLC | 15,037 | $358.2K | 0.00% | +15,037 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 15,579 | $371.6K | 0.00% | +551+3.7% | Added |
| Perkins Capital Management Inc | 16,140 | $384.9K | 0.30% | +725+4.7% | Added |
| Citigroup Inc | 16,144 | $385.0K | 0.00% | +12,117+300.9% | Added |
| Diversify Wealth Management, LLC | 15,932 | $389.4K | 0.01% | +172+1.1% | Added |
| Diversify Advisory Services, LLC | 15,932 | $389.4K | 0.01% | +15,932 | New |
| Quantinno Capital Management LP | 16,428 | $391.8K | 0.00% | −29,048−63.9% | Reduced |
| Campbell & CO Investment Adviser LLC | 16,476 | $393.0K | 0.02% | −132,348−88.9% | Reduced |
| Counterpoint Mutual Funds LLC | 16,510 | $393.8K | 0.04% | +16,510 | New |
| MetLife Investment Management | 17,008 | $405.6K | 0.00% | +286+1.7% | Added |
| Vanguard Asset Management, Ltd | 17,653 | $421.0K | 0.00% | 00.0% | Unchanged |
| First Bank & Trust | 18,591 | $443.4K | 0.07% | +2,087+12.6% | Added |
| Schonfeld Strategic Advisors LLC | 19,930 | $475.3K | 0.00% | −22,483−53.0% | Reduced |
| Legal & General Group Plc | 20,548 | $490.1K | 0.00% | −2,636−11.4% | Reduced |
| Toroso Investments, LLC | 22,186 | $529.1K | 0.00% | +22,186 | New |
| Truist Financial Corp | 23,786 | $567.3K | 0.00% | +50.0% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 25,221 | $601.5K | 0.00% | −9,166−26.7% | Reduced |
| Alliancebernstein L.P. | 27,100 | $665.3K | 0.00% | +1,830+7.2% | Added |
| CWM Advisors, LLC | 29,047 | $692.8K | 0.03% | +8,002+38.0% | Added |
| Engineers Gate Manager LP | 29,480 | $703.1K | 0.01% | +11,224+61.5% | Added |
| Wells Fargo & Company | 29,543 | $704.6K | 0.00% | +16,651+129.2% | Added |