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CSTL · Castle Biosciences Inc

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$24.06 +0.17 (+0.71%)
Market Cap
$724.58M
Shares
30.33M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 187
Total Value: $654,988,496
Total Shares: 26,692,470
Showing 1–100 of 191 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 186 13F filers
Top Holder
11.1%
Jun 2023 → Mar 2026 · range 10.3% – 13.7%
of institutional value
Top 5
37.4%
Jun 2023 → Mar 2026 · range 33.7% – 46.7%
of institutional value
Top 10
53.4%
Jun 2023 → Mar 2026 · range 48.6% – 64.2%
of institutional value
HHI
422
Jun 2023 → Mar 2026 · range 362 – 585
Broadly held
Showing 100 of 191
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $73,231,316 11.18% 2,982,946
Large RTW INVESTMENTS, LP $67,717,124 10.34% 2,758,335
Mega PRINCIPAL FINANCIAL GROUP INC $43,450,479 6.63% 1,769,877
Mid Portolan Capital Management, LLC $33,149,447 5.06% 1,350,283
Mega VANGUARD CAPITAL MANAGEMENT LLC $28,908,165 4.41% 1,177,522
Mega DIMENSIONAL FUND ADVISORS LP $25,526,130 3.90% 1,039,761
Mid SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC $23,093,816 3.53% 940,685
Large Allianz Asset Management GmbH $19,918,003 3.04% 811,324
Mega STATE STREET CORP $18,880,889 2.88% 769,079
Mega GEODE CAPITAL MANAGEMENT, LLC $17,874,854 2.73% 728,100
Small AIGH Capital Management LLC $14,499,254 2.21% 590,601
Large Qube Research & Technologies Ltd $13,737,762 2.10% 559,583
Mid PALISADE CAPITAL MANAGEMENT, LP $13,155,952 2.01% 535,884
Large RENAISSANCE TECHNOLOGIES LLC $13,080,240 2.00% 532,800
Mega Nuveen, LLC $12,818,217 1.96% 522,127
Large ACADIAN ASSET MANAGEMENT LLC $11,893,026 1.82% 484,441
Mega MORGAN STANLEY $10,530,326 1.61% 428,934
Mid EVENTIDE ASSET MANAGEMENT, LLC $9,486,733 1.45% 386,425
Large Connor, Clark & Lunn Investment Management Ltd. $9,257,363 1.41% 377,082
Mega MILLENNIUM MANAGEMENT LLC $8,673,981 1.32% 353,319
Mega GOLDMAN SACHS GROUP INC $8,375,747 1.28% 341,171
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $7,339,001 1.12% 298,941
Mega NORTHERN TRUST CORP Bank $6,704,627 1.02% 273,101
Large WASATCH ADVISORS LP $6,662,473 1.02% 279,349
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $6,592,534 1.01% 268,535
Mid KORNITZER CAPITAL MANAGEMENT INC /KS $6,490,921 0.99% 264,396
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $6,264,767 0.96% 255,184
Mega TWO SIGMA INVESTMENTS, LP $6,109,022 0.93% 248,840
Mid Advisors Capital Management, LLC $6,097,630 0.93% 248,376
Large SG Americas Securities, LLC Broker-Dealer $6,011,951 0.92% 244,886
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $5,938,154 0.91% 241,880
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $5,721,279 0.87% 233,046
Large TUDOR INVESTMENT CORP ET AL $5,474,208 0.84% 222,982
Large PANAGORA ASSET MANAGEMENT INC $5,458,766 0.83% 222,353
Mega D. E. Shaw & Co., Inc. $5,203,765 0.79% 211,966
Mega VANGUARD FIDUCIARY TRUST CO Bank $4,620,580 0.71% 188,211
Large Allspring Global Investments Holdings, LLC $3,944,276 0.60% 160,663
Mid Campbell & CO Investment Adviser LLC $3,653,629 0.56% 148,824
Large Empowered Funds, LLC $3,245,117 0.50% 132,184
Large Trexquant Investment LP $3,202,154 0.49% 130,434
Small Parkman Healthcare Partners LLC $3,096,982 0.47% 126,150
Mega BNP PARIBAS ARBITRAGE, SA $2,998,929 0.46% 122,156
Mega CITADEL ADVISORS LLC $2,969,984 0.45% 120,977
Mega FRANKLIN RESOURCES INC $2,231,814 0.34% 90,909
Mega JPMORGAN CHASE & CO $2,179,325 0.33% 88,771
Mega Bank of New York Mellon Corp Bank $2,176,454 0.33% 88,654
Mega AMERICAN CENTURY COMPANIES INC $1,942,076 0.30% 79,107
Mid Orion Porfolio Solutions, LLC $1,838,696 0.28% 74,896
Large MACKENZIE FINANCIAL CORP $1,819,425 0.28% 74,111
Mega BANK OF AMERICA CORP /DE/ Bank $1,664,735 0.25% 67,810
Mid SummitTX Capital, L.P. $1,645,660 0.25% 67,033
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,594,864 0.24% 64,964
Mega AQR CAPITAL MANAGEMENT LLC $1,592,801 0.24% 64,880
Mega ENVESTNET ASSET MANAGEMENT INC $1,518,785 0.23% 61,865
Mega Invesco Ltd. $1,497,843 0.23% 61,012
Mega Swiss National Bank Bank $1,406,715 0.21% 57,300
Mega FMR LLC $1,237,613 0.19% 50,412
Mega UBS Group AG $1,206,950 0.18% 49,163
Large Man Group plc $1,157,237 0.18% 47,138
Small FORMULA GROWTH LTD $1,129,300 0.17% 46,000
Large Quantinno Capital Management LP $1,116,435 0.17% 45,476
Mega JANE STREET GROUP, LLC $1,044,896 0.16% 42,562
Large Schonfeld Strategic Advisors LLC $1,041,239 0.16% 42,413
Mega RHUMBLINE ADVISERS $942,179 0.14% 38,378
Mega PRICE T ROWE ASSOCIATES INC /MD/ $927,793 0.14% 37,792
Large KBC Group NV $906,680 0.14% 36,932
Large NOMURA HOLDINGS INC $877,613 0.13% 35,748
Large SEI INVESTMENTS CO $860,378 0.13% 35,046
Mid ALGERT GLOBAL LLC $853,799 0.13% 34,778
Large Universal- Beteiligungs- und Servicegesellschaft mbH $844,200 0.13% 34,387
Large ExodusPoint Capital Management, LP $800,526 0.12% 32,608
Mega CITADEL ADVISORS LLC $797,875 0.12% 32,500
Large Corient Private Wealth LLC $782,408 0.12% 31,870
Mid Y-Intercept (Hong Kong) Ltd $761,196 0.12% 31,916
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $675,444 0.10% 27,513
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $666,336 0.10% 27,142
Mega BARCLAYS PLC $658,184 0.10% 26,810
Small FOX RUN MANAGEMENT, L.L.C. $644,363 0.10% 26,247
Mid HARBOR CAPITAL ADVISORS, INC. $628,823 0.10% 25,614
Mega ALLIANCEBERNSTEIN L.P. $620,378 0.09% 25,270
Large STRS OHIO $613,750 0.09% 25,000
Mega DEUTSCHE BANK AG\ Bank $593,226 0.09% 24,164
Mid Magnetar Financial LLC $572,800 0.09% 23,332
Mega Legal & General Group Plc $569,166 0.09% 23,184
Large TRUIST FINANCIAL CORP $567,296 0.09% 23,786
Mega JANE STREET GROUP, LLC $559,740 0.09% 22,800
Mid Quantbot Technologies LP $541,573 0.08% 22,060
Small Inspire Investing, LLC $516,654 0.08% 21,045
Mid XTX Topco Ltd $497,947 0.08% 20,283
Mid Brevan Howard Capital Management LP $455,648 0.07% 18,560
Mid Engineers Gate Manager LP $448,184 0.07% 18,256
Small First Bank & Trust Bank $443,395 0.07% 18,591
Mega VANGUARD ASSET MANAGEMENT, Ltd $433,381 0.07% 17,653
Large MetLife Investment Management, LLC $410,525 0.06% 16,722
Small Counterpoint Mutual Funds LLC Mutual Fund $393,763 0.06% 16,510
Small Dynamic Technology Lab Private Ltd $390,664 0.06% 15,913
Large HRT FINANCIAL LP $389,313 0.06% 15,858
Mid DIVERSIFY WEALTH MANAGEMENT, LLC $386,908 0.06% 15,760
Small PERKINS CAPITAL MANAGEMENT INC $384,939 0.06% 16,140
Mega JANUS HENDERSON GROUP PLC $369,158 0.06% 15,037
Key facts CIK 1447362 CUSIP 14843C105 13F (30d) 28 filings 28 filers Visit website Investor relations

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