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 |
|---|---|---|---|---|---|
| Larson Financial Group LLC | 1 | $23 | 0.00% | +1 | New |
| True Wealth Design, LLC | 1 | $23 | 0.00% | +1 | New |
| Advisory Services Network, LLC | 7 | $159 | 0.00% | +7 | New |
| Clearstead Advisors, LLC | 12 | $274 | 0.00% | +12 | New |
| Missouri Trust & Investment Co | 19 | $433 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 19 | $433 | 0.00% | +14+280.0% | Added |
| EverSource Wealth Advisors, LLC | 20 | $455 | 0.00% | −27−57.4% | Reduced |
| Jones Financial Companies LLLP | 25 | $568 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 26 | $592 | 0.00% | +26 | New |
| Optiver Holding B.V. | 40 | $911 | 0.00% | +40 | New |
| Signaturefd, LLC | 45 | $1.02K | 0.00% | 00.0% | Unchanged |
| Spire Wealth Management | 50 | $1.14K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 52 | $1.18K | 0.00% | −80−60.6% | Reduced |
| IFP Advisors, Inc | 52 | $1.18K | 0.00% | +16+44.4% | Added |
| SBI Securities Co., Ltd. | 53 | $1.21K | 0.00% | +3+6.0% | Added |
| Rothschild Investment LLC | 55 | $1.25K | 0.00% | −30−35.3% | Reduced |
| Principal Securities, Inc. | 76 | $1.73K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 86 | $2.00K | 0.00% | 00.0% | Unchanged |
| BFSG, LLC | 90 | $2.05K | 0.00% | 00.0% | Unchanged |
| Point72 Europe (London) LLP | 112 | $2.56K | 0.00% | +112 | New |
| The PNC Financial Services Group, Inc. | 115 | $2.62K | 0.00% | +5+4.5% | Added |
| Essential Partners LLC | 123 | $2.80K | 0.00% | +123 | New |
| Huntington National Bank | 139 | $3.17K | 0.00% | −58−29.4% | Reduced |
| Versant Capital Management, Inc | 181 | $4.12K | 0.00% | +55+43.7% | Added |
| Quadrant Capital Group LLC | 336 | $7.65K | 0.00% | +336 | New |
| Nisa Investment Advisors, LLC | 364 | $8.29K | 0.00% | +44+13.8% | Added |
| Rossby Financial, LCC | 382 | $8.79K | 0.00% | +240+169.0% | Added |
| Advisor Group Holdings, Inc. | 408 | $9.26K | 0.00% | +209+105.0% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 461 | $10.0K | 0.00% | +33+7.7% | Added |
| First Horizon Corp | 447 | $10.2K | 0.00% | +447 | New |
| SRS Capital Advisors, Inc. | 574 | $13.1K | 0.00% | +574 | New |
| GF Fund Management Co. Ltd. | 624 | $14.2K | 0.00% | −92−12.8% | Reduced |
| Hughes Financial Services, LLC | 435 | $15.1K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 728 | $16.6K | 0.01% | +622+586.8% | Added |
| Group One Trading, L.P. | 803 | $18.3K | 0.00% | +803 | New |
| Royal Bank of Canada | 897 | $20.0K | 0.00% | −9,676−91.5% | Reduced |
| Amalgamated Bank | 893 | $20.0K | 0.00% | 00.0% | Unchanged |
| Global Retirement Partners, LLC | 1,100 | $25.0K | 0.00% | −63−5.4% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 1,121 | $25.5K | 0.00% | +6+0.5% | Added |
| Farther Finance Advisors, LLC | 1,392 | $31.7K | 0.00% | +1,391+139,100.0% | Added |
| Simplex Trading, LLC | 1,512 | $34.0K | 0.00% | +1,512 | New |
| State of Alaska, Department of Revenue | 1,553 | $35.0K | 0.00% | +1,553 | New |
| CWM, LLC | 1,911 | $44.0K | 0.00% | +853+80.6% | Added |
| Sterling Capital Management LLC | 1,960 | $44.6K | 0.00% | +1,193+155.5% | Added |
| Covestor Ltd | 2,069 | $47.0K | 0.03% | −311−13.1% | Reduced |
| Aquatic Capital Management LLC | 2,335 | $53.2K | 0.00% | −16,945−87.9% | Reduced |
| Ameritas Investment Partners, Inc. | 2,373 | $54.0K | 0.00% | −527−18.2% | Reduced |
| Point72 (DIFC) Ltd | 2,386 | $54.3K | 0.00% | +2,386 | New |
| Canada Pension Plan Investment Board | 2,400 | $54.6K | 0.00% | +2,400 | New |
| Russell Investments Group, Ltd. | 2,508 | $57.1K | 0.00% | +976+63.7% | Added |
| Harbour Investments, Inc. | 3,137 | $71.4K | 0.00% | +150+5.0% | Added |
| Tower Research Capital LLC (TRC) | 3,666 | $83.5K | 0.00% | +875+31.4% | Added |
| Citigroup Inc | 4,250 | $96.8K | 0.00% | −9,822−69.8% | Reduced |
| China Universal Asset Management Co., Ltd. | 5,085 | $115.8K | 0.01% | −714−12.3% | Reduced |
| Assetmark, Inc | 5,705 | $129.9K | 0.00% | +1,158+25.5% | Added |
| Police & Firemen's Retirement System of New Jersey | 7,829 | $178.3K | 0.00% | +1,992+34.1% | Added |
| KLP Kapitalforvaltning AS | 8,900 | $202.7K | 0.00% | +4,100+85.4% | Added |
| Janus Henderson Group PLC | 9,137 | $208.2K | 0.00% | +9,137 | New |
| LPL Financial LLC | 9,397 | $214.0K | 0.00% | +9,397 | New |
| Green Alpha Advisors, LLC | 9,538 | $217.2K | 0.21% | +9,538 | New |
| Manufacturers Life Insurance Company, The | 9,539 | $217.2K | 0.00% | −777−7.5% | Reduced |
| STRS Ohio | 9,800 | $223.1K | 0.00% | −1,900−16.2% | Reduced |
| Atom Investors LP | 9,827 | $223.8K | 0.02% | +9,827 | New |
| Two Sigma Advisers, LP | 9,900 | $225.4K | 0.00% | −2,100−17.5% | Reduced |
| Lido Advisors, LLC | 10,036 | $228.5K | 0.00% | +50.0% | Added |
| Glenmede Investment Management, LP | 10,199 | $232.2K | 0.00% | +10,199 | New |
| Magnetar Financial LLC | 10,327 | $235.1K | 0.00% | +10,327 | New |
| Great West Life Assurance Co | 10,713 | $239.0K | 0.00% | 00.0% | Unchanged |
| Stephens Inc | 11,122 | $253.2K | 0.00% | −264−2.3% | Reduced |
| Bailard, Inc. | 11,400 | $259.6K | 0.01% | +11,400 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 12,207 | $278.0K | 0.00% | +118+1.0% | Added |
| Summit Global Investments | 12,352 | $281.0K | 0.02% | −3,297−21.1% | Reduced |
| Intech Investment Management LLC | 12,392 | $282.2K | 0.00% | +103+0.8% | Added |
| SG Americas Securities, LLC | 13,061 | $297.0K | 0.00% | +13,061 | New |
| Harbor Capital Advisors, Inc. | 13,171 | $300.0K | 0.02% | −7,228−35.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 13,273 | $302.2K | 0.00% | −2,288−14.7% | Reduced |
| Diversify Wealth Management, LLC | 11,747 | $305.3K | 0.02% | −575−4.7% | Reduced |
| Simon Quick Advisors, LLC | 13,562 | $308.8K | 0.01% | 00.0% | Unchanged |
| Fox Run Management, L.L.C. | 13,820 | $314.7K | 0.05% | +13,820 | New |
| Quest Partners LLC | 14,544 | $331.2K | 0.02% | +12,449+594.2% | Added |
| Verition Fund Management LLC | 15,642 | $356.2K | 0.00% | −15,897−50.4% | Reduced |
| MetLife Investment Management | 15,881 | $361.6K | 0.00% | 00.0% | Unchanged |
| Creative Planning | 16,276 | $370.6K | 0.00% | +5,165+46.5% | Added |
| Deutsche Bank AG | 16,642 | $378.9K | 0.00% | −45,101−73.0% | Reduced |
| Capstone Investment Advisors, LLC | 16,677 | $379.7K | 0.00% | +16,677 | New |
| Oak Harvest Investment Services | 16,883 | $384.4K | 0.04% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 17,786 | $405.0K | 0.01% | −10,107−36.2% | Reduced |
| Brevan Howard Capital Management LP | 19,128 | $435.5K | 0.01% | −22,173−53.7% | Reduced |
| First Bank & Trust | 19,799 | $450.8K | 0.08% | −152−0.8% | Reduced |
| CWM Advisors, LLC | 19,887 | $452.8K | 0.04% | +770+4.0% | Added |
| Graham Capital Management, L.P. | 21,133 | $481.2K | 0.02% | −20,650−49.4% | Reduced |
| Panagora Asset Management Inc | 21,398 | $487.2K | 0.00% | +21,398 | New |
| Jane Street Group, LLC | 22,884 | $521.1K | 0.00% | +22,884 | New |
| Truist Financial Corp | 23,371 | $532.2K | 0.00% | −652−2.7% | Reduced |
| Wells Fargo & Company | 23,979 | $546.0K | 0.00% | +3,679+18.1% | Added |
| Los Angeles Capital Management LLC | 24,121 | $549.2K | 0.00% | +24,121 | New |
| Mackenzie Financial Corp | 24,204 | $551.1K | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 24,225 | $551.6K | 0.00% | −18,628−43.5% | Reduced |
| California State Teachers Retirement System | 24,622 | $560.6K | 0.00% | +20.0% | Added |
| Two Sigma Investments, LP | 25,700 | $585.2K | 0.00% | −2,541−9.0% | Reduced |