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 |
|---|---|---|---|---|---|
| Creative Planning | 13,681 | $326.3K | 0.00% | +1,202+9.6% | Added |
| Oak Harvest Investment Services | 13,485 | $321.6K | 0.03% | 00.0% | Unchanged |
| Summit Global Investments | 13,078 | $312.0K | 0.02% | −640−4.7% | Reduced |
| Birchview Capital, LP | 12,984 | $309.7K | 0.14% | +84+0.7% | Added |
| Parallel Advisors, LLC | 12,931 | $308.4K | 0.00% | −370−2.8% | Reduced |
| Manufacturers Life Insurance Company, The | 12,543 | $299.2K | 0.00% | +105+0.8% | Added |
| Vanguard Global Advisers, LLC | 11,502 | $274.3K | 0.00% | 00.0% | Unchanged |
| TritonPoint Partners, LLC | 10,796 | $257.5K | 0.02% | +19+0.2% | Added |
| Numerai GP LLC | 10,348 | $246.8K | 0.02% | +2,041+24.6% | Added |
| Quadrature Capital Ltd | 10,175 | $242.7K | 0.00% | +10,175 | New |
| Lido Advisors, LLC | 10,034 | $239.3K | 0.00% | +30.0% | Added |
| Green Alpha Advisors, LLC | 9,941 | $237.1K | 0.16% | −40.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 9,855 | $235.0K | 0.00% | +2,026+25.9% | Added |
| Allstate Corp | 9,642 | $230.0K | 0.00% | +9,642 | New |
| EntryPoint Capital, LLC | 8,942 | $213.3K | 0.05% | +8,942 | New |
| Cetera Investment Advisers | 8,632 | $205.9K | 0.00% | −576−6.3% | Reduced |
| Intech Investment Management LLC | 8,580 | $204.6K | 0.00% | +8,580 | New |
| Simon Quick Advisors, LLC | 8,561 | $204.2K | 0.01% | 00.0% | Unchanged |
| Glenmede Trust Co NA | 8,536 | $203.6K | 0.00% | +368+4.5% | Added |
| Vanguard Investments Australia, Ltd. | 7,553 | $180.1K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 6,710 | $160.0K | 0.00% | +931+16.1% | Added |
| KLP Kapitalforvaltning AS | 6,200 | $147.9K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 4,923 | $117.4K | 0.01% | −4,599−48.3% | Reduced |
| China Universal Asset Management Co., Ltd. | 4,827 | $115.1K | 0.01% | −449−8.5% | Reduced |
| US Bancorp | 4,478 | $106.8K | 0.00% | +4,386+4,767.4% | Added |
| Harbour Investments, Inc. | 3,977 | $94.9K | 0.00% | +729+22.4% | Added |
| Great West Life Assurance Co | 3,244 | $77.0K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 2,773 | $66.1K | 0.00% | +1,169+72.9% | Added |
| Ameritas Investment Partners, Inc. | 2,717 | $64.8K | 0.00% | +344+14.5% | Added |
| Quantbot Technologies LP | 2,599 | $62.0K | 0.00% | −19,461−88.2% | Reduced |
| Farther Finance Advisors, LLC | 1,806 | $43.1K | 0.00% | −582−24.4% | Reduced |
| State of Alaska, Department of Revenue | 1,553 | $37.0K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 1,356 | $32.3K | 0.00% | −195−12.6% | Reduced |
| Advisor Group Holdings, Inc. | 1,191 | $28.4K | 0.00% | +334+39.0% | Added |
| Global Retirement Partners, LLC | 1,100 | $26.2K | 0.00% | +1,100 | New |
| Meeder Asset Management Inc | 994 | $23.7K | 0.00% | +607+156.8% | Added |
| Royal Bank of Canada | 976 | $23.0K | 0.00% | +799+451.4% | Added |
| GWM Advisors LLC | 842 | $20.1K | 0.00% | +842 | New |
| SRS Capital Advisors, Inc. | 786 | $18.7K | 0.00% | +782+19,550.0% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 707 | $16.9K | 0.00% | −54−7.1% | Reduced |
| First Horizon Corp | 662 | $15.8K | 0.00% | +75+12.8% | Added |
| GF Fund Management Co. Ltd. | 631 | $15.0K | 0.00% | −17−2.6% | Reduced |
| Sterling Capital Management LLC | 603 | $14.4K | 0.00% | −368−37.9% | Reduced |
| Nykredit A/S | 597 | $14.2K | 0.00% | +597 | New |
| Federated Hermes, Inc. | 489 | $11.7K | 0.00% | −760−60.8% | Reduced |
| Covestor Ltd | 473 | $11.0K | 0.01% | −623−56.8% | Reduced |
| Hughes Financial Services, LLC | 436 | $10.4K | 0.00% | −10−2.2% | Reduced |
| Rossby Financial, LCC | 429 | $10.2K | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 343 | $8.34K | 0.00% | +93+37.2% | Added |
| Allworth Financial LP | 264 | $6.30K | 0.00% | +201+319.0% | Added |
| Nisa Investment Advisors, LLC | 256 | $6.11K | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 191 | $4.55K | 0.00% | +191 | New |
| Essential Partners LLC | 190 | $4.53K | 0.00% | +61+47.3% | Added |
| Optiver Holding B.V. | 174 | $4.15K | 0.00% | +174 | New |
| Los Angeles Capital Management LLC | 171 | $4.08K | 0.00% | −12,557−98.7% | Reduced |
| The PNC Financial Services Group, Inc. | 157 | $3.74K | 0.00% | −6−3.7% | Reduced |
| Silver Grove Financial Group, Inc. | 156 | $3.72K | 0.00% | +156 | New |
| Huntington National Bank | 139 | $3.31K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 139 | $3.31K | 0.00% | +119+595.0% | Added |
| Versant Capital Management, Inc | 126 | $3.00K | 0.00% | −120−48.8% | Reduced |
| BFSG, LLC | 90 | $2.15K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 87 | $2.08K | 0.00% | −346−79.9% | Reduced |
| IFP Advisors, Inc | 60 | $1.43K | 0.00% | +8+15.4% | Added |
| Rothschild Investment LLC | 54 | $1.29K | 0.00% | −4−6.9% | Reduced |
| Spire Wealth Management | 50 | $1.19K | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 48 | $1.15K | 0.00% | +48 | New |
| SBI Securities Co., Ltd. | 47 | $1.12K | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 42 | $1.00K | 0.00% | +40+2,000.0% | Added |
| Parkside Financial Bank & Trust | 25 | $596 | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 19 | $453 | 0.00% | −27−58.7% | Reduced |
| Investors Portfolio Services LLC | 18 | $429 | 0.00% | 00.0% | Unchanged |
| SJS Investment Consulting Inc. | 15 | $358 | 0.00% | −4−21.1% | Reduced |
| Smartleaf Asset Management LLC | 8 | $213 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 6 | $143 | 0.00% | +6 | New |
| Fortitude Family Office, LLC | 1 | $24 | 0.00% | +1 | New |
| Freestone Grove Partners LP | 1 | $24 | 0.00% | +1 | New |
| Eventide Asset Management, LLC | 0 | $0 | 0.00% | −386,425−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −298,941−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −244,886−100.0% | Sold out |
| Formula Growth Ltd | 0 | $0 | 0.00% | −46,000−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −35,748−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −32,608−100.0% | Sold out |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −31,870−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −26,247−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −23,332−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −18,560−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −15,913−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −12,300−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −12,236−100.0% | Sold out |
| Canada Pension Plan Investment Board | 0 | $0 | 0.00% | −11,400−100.0% | Sold out |
| Jackson Creek Investment Advisors LLC | 0 | $0 | 0.00% | −11,214−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −11,133−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −9,520−100.0% | Sold out |
| Globeflex Capital L P | 0 | $0 | 0.00% | −3,759−100.0% | Sold out |
| Quadrant Capital Group LLC | 0 | $0 | 0.00% | −336−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −292−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −287−100.0% | Sold out |
| Massmutual Trust Co FSB | 0 | $0 | 0.00% | −202−100.0% | Sold out |
| RWM Asset Management, LLC | 0 | $0 | 0.00% | −88−100.0% | Sold out |
| Signaturefd, LLC | 0 | $0 | 0.00% | −45−100.0% | Sold out |