Castle BiosciencesCSTL
13F holders, Q2 2026 (June 30)176holders −10
19new positions
30sold out
7famous investors
$23.85avg. 13F price*
At the end of Q2 2026, 176 institutions reported holding Castle Biosciences Inc. (CSTL) in their 13F filings, down 10 from Q1 2026. 19 opened new positions and 30 sold out. The largest holders were BlackRock, Inc. ($78.5M), RTW Investments, LP ($66.3M) and Principal Financial Group Inc. ($41.2M). 7 famous investors held it, including Steve Cohen (0.0% of Point72 Asset Management's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Castle Biosciences Inc.
- CUSIP
- 14843C105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $38.0M |
| Exits | 30 | $30.0M |
All 13F filers, Q1 2026 → Q2 2026: 4,537,583 shares bought and 4,796,930 shares sold, net −259,347 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 176 holders
| BlackRock, Inc. | 0.00% | Add +10.4% | 3,291,963 | $78.5M |
| RTW Investments, LP | 0.57% | Add +0.7% | 2,778,335 | $66.3M |
| Principal Financial Group Inc. | 0.02% | Reduce -2.4% | 1,726,648 | $41.2M |
| Vanguard Capital Management LLC | 0.00% | Add +4.2% | 1,226,497 | $29.3M |
| Acadian Asset Management LLC | 0.03% | Add +89.6% | 918,668 | $21.9M |
| Allianz Asset Management GmbH | 0.02% | Add +8.4% | 879,258 | $21.0M |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -2.4% | 840,785 | $20.1M |
| Summit Partners Public Asset Management, LLC | 0.51% | Reduce -12.3% | 824,872 | $19.7M |
| State Street Corp. | 0.00% | Add +6.9% | 822,079 | $19.6M |
| Geode Capital Management, LLC | 0.00% | Add +9.3% | 795,912 | $19.0M |
| Mackenzie Financial Corp. | 0.02% | Add +970.7% | 793,507 | $18.9M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -23.9% | 791,085 | $18.9M |
| Jefferies Financial Group Inc. | 0.15% | New | 647,391 | $15.4M |
| Qube Research & Technologies Ltd | 0.02% | Add +5.3% | 589,300 | $14.1M |
| AIGH Capital Management LLC | 1.18% | Reduce -7.7% | 545,101 | $13.0M |
| Renaissance Technologies | 0.01% | Reduce -30.3% | 371,200 | $8.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +5.0% | 358,397 | $8.5M |
| Point72 Asset Management | 0.01% | New | 357,317 | $8.5M |
| Kennedy Capital Management LLC | 0.15% | New | 348,371 | $8.3M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Reduce -12.0% | 331,727 | $7.9M |
| Morgan Stanley | 0.00% | Reduce -23.1% | 329,684 | $7.9M |
| Portolan Capital Management, LLC | 0.29% | Reduce -75.7% | 328,818 | $7.8M |
| Panagora Asset Management Inc. | 0.02% | Add +35.4% | 301,040 | $7.2M |
| Allspring Global Investments Holdings, LLC | 0.01% | Add +82.0% | 292,470 | $7.0M |
| Northern Trust Corp. | 0.00% | Add +4.4% | 285,158 | $6.8M |
| Wasatch Advisors LP | 0.04% | Reduce -38.6% | 279,349 | $6.7M |
| Citadel Advisors | 0.00% | Add +119.3% | 265,353 | $6.3M |
| Kornitzer Capital Management Inc. | 0.13% | Reduce -0.1% | 264,235 | $6.3M |
| Silvercrest Asset Management Group LLC | 0.04% | Reduce -4.6% | 256,095 | $6.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.2% | 254,535 | $6.1M |
| Advisors Capital Management, LLC | 0.06% | Reduce -4.1% | 238,204 | $5.7M |
| New York State Common Retirement Fund | 0.01% | Add +0.7% | 234,746 | $5.6M |
| Palisade Capital Management, LP | 0.27% | Reduce -56.7% | 231,931 | $5.5M |
| Nuveen, LLC | 0.00% | Reduce -55.6% | 231,726 | $5.5M |
| Bridgeway Capital Management, LLC | 0.09% | Reduce -13.3% | 221,338 | $5.3M |
| Trexquant Investment LP | 0.03% | Add +58.0% | 206,111 | $4.9M |
| Millennium Management | 0.00% | Reduce -41.9% | 205,369 | $4.9M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +4.9% | 197,494 | $4.7M |
| AQR Capital Management | 0.00% | Add +156.7% | 166,567 | $4.0M |
| First Trust Advisors LP | 0.00% | New | 145,064 | $3.5M |
| Parkman Healthcare Partners LLC | 0.35% | Add +14.8% | 144,791 | $3.5M |
| Empowered Funds, LLC | 0.02% | Add +7.7% | 142,338 | $3.4M |
| HRT Financial LP | 0.01% | Add +630.6% | 115,853 | $2.8M |
| D. E. Shaw & Co. | 0.00% | Reduce -46.8% | 112,789 | $2.7M |
| Man Group plc | 0.00% | Add +130.7% | 108,761 | $2.6M |
| Two Sigma Investments, LP | 0.00% | Reduce -59.7% | 100,374 | $2.4M |
| Bank of America Corp. | 0.00% | Add +45.6% | 98,745 | $2.4M |
| Bank of New York Mellon Corp | 0.00% | Add +10.6% | 98,018 | $2.3M |
| Franklin Resources Inc. | 0.00% | Add +7.5% | 97,733 | $2.3M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +241.7% | 92,736 | $2.2M |
| UBS Group AG | 0.00% | Add +81.8% | 89,368 | $2.1M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.5% | 84,804 | $2.1M |
| SummitTX Capital, L.P. | 0.05% | Add +17.9% | 79,018 | $1.9M |
| Sei Investments Co. | 0.00% | Add +112.4% | 74,433 | $1.8M |
| Algert Global LLC | 0.02% | Add +102.7% | 70,478 | $1.7M |
| Orion Porfolio Solutions, LLC | 0.01% | Reduce -7.0% | 69,654 | $1.7M |
| BNP Paribas Financial Markets | 0.00% | Reduce -43.0% | 69,571 | $1.7M |
| American Century Companies Inc. | 0.00% | Reduce -17.3% | 65,413 | $1.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -0.9% | 64,346 | $1.5M |
| Norges Bank | 0.00% | — | 60,100 | $1.4M |
| FMR LLC | 0.00% | Add +10.8% | 55,871 | $1.3M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -10.8% | 55,157 | $1.3M |
| Invesco Ltd. | 0.00% | Reduce -10.0% | 54,888 | $1.3M |
| Swiss National Bank | 0.00% | Reduce -6.3% | 53,700 | $1.3M |
| T. Rowe Price Associates Inc. | 0.00% | Add +40.9% | 53,242 | $1.3M |
| Jane Street Group, LLC | 0.00% | Add +5.2% | 44,793 | $1.1M |
| XTX Topco Ltd | 0.01% | Add +96.8% | 39,923 | $952K |
| Rhumbline Advisers | 0.00% | Add +1.6% | 39,010 | $930K |
| California State Teachers Retirement System | 0.00% | Add +37.4% | 37,802 | $902K |
| KBC Group NV | 0.00% | Reduce -2.4% | 36,042 | $860K |
| Russell Investments Group, Ltd. | 0.00% | Add +240.1% | 31,679 | $761K |
| Y-Intercept (Hong Kong) Ltd | 0.02% | Add +35.8% | 31,916 | $761K |
| Harbor Capital Advisors, Inc. | 0.05% | Add +23.9% | 31,748 | $757K |
| STRS Ohio | 0.00% | Add +22.0% | 30,500 | $727K |
| Barclays PLC | 0.00% | Add +13.1% | 30,330 | $723K |
| Deutsche Bank AG | 0.00% | Add +24.7% | 30,139 | $719K |
| Wells Fargo & Company | 0.00% | Add +129.2% | 29,543 | $705K |
| Engineers Gate Manager LP | 0.01% | Add +61.5% | 29,480 | $703K |
| Inspire Investing, LLC | 0.03% | Add +38.0% | 29,047 | $693K |
| Alliancebernstein L.P. | 0.00% | Add +7.2% | 27,100 | $665K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Reduce -26.7% | 25,221 | $602K |
| Truist Financial Corp. | 0.00% | Add +0.0% | 23,786 | $567K |
| Tidal Investments LLC | 0.00% | New | 22,186 | $529K |
| Legal & General Group Plc | 0.00% | Reduce -11.4% | 20,548 | $490K |
| Schonfeld Strategic Advisors LLC | 0.00% | Reduce -53.0% | 19,930 | $475K |
| First Bank & Trust | 0.07% | Add +12.7% | 18,591 | $443K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 17,653 | $421K |
| MetLife Investment Management, LLC | 0.00% | Add +1.7% | 17,008 | $406K |
| Counterpoint Mutual Funds LLC | 0.04% | New | 16,510 | $394K |
| Campbell & CO Investment Adviser LLC | 0.02% | Reduce -88.9% | 16,476 | $393K |
| Quantinno Capital Management LP | 0.00% | Reduce -63.9% | 16,428 | $392K |
| Diversify Advisory Services, LLC | 0.01% | New | 15,932 | $389K |
| Diversify Wealth Management, LLC | 0.01% | Add +1.1% | 15,932 | $389K |
| Citigroup Inc. | 0.00% | Add +300.9% | 16,144 | $385K |
| Perkins Capital Management Inc. | 0.29% | Add +4.7% | 16,140 | $385K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | Add +3.7% | 15,579 | $372K |
| Jupiter Topco LLC | 0.00% | — | 15,037 | $358K |
| Tudor Investment Corporation | 0.00% | Reduce -93.5% | 14,462 | $345K |
| LPL Financial LLC | 0.00% | Add +46.6% | 14,220 | $339K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +0.8% | 13,785 | $329K |
"% of holder's portfolio" is CSTL's weight in each manager's 13F, not the share of Castle Biosciences Inc. the manager owns.