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Disclosery

CSTL CASTLE BIOSCIENCES INC

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COMMON STOCK (common), issuer CIK 1447362

169 managers (177 13F filers) reported a position in CSTL shares at 2026-06-30, 27,341,828 shares in all. 21 filers opened a position and 30 filers sold out during the quarter.

Managers
169
13F filers
177
New
21
Added
79
Reduced
56
Sold out
30
Shares held by filers
27,341,828

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.3,291,963$78.5M<0.01%+309,01713F-HRTimelineGroup
RTW INVESTMENTS, LP2,778,335$66.3M0.57%+20,00013F-HRTimeline
VANGUARD GROUP INCgroup of 6 filers holding2,301,484$54.9M+37,272Timeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC1,726,648$41.2M0.02%-43,22913F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC918,668$21.9M0.03%+434,22713F-HRTimelineGroup
Allianz Asset Management GmbHin group Allianz SE811,324$19.9M0.02%013F-HRTimelineGroup
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT…in group SUMMIT PARTNERS PUBLIC ASSET …824,872$19.7M0.51%-115,81313F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP822,079$19.6M<0.01%+53,00013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC795,912$19M<0.01%+67,81213F-HRTimelineGroup
MACKENZIE FINANCIAL CORP793,507$18.9M0.02%+719,39613F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP791,085$18.9M<0.01%-248,67613F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.647,391$15.4M0.14%new13F-HRTimelineGroup
Qube Research & Technologies Ltd589,300$14.1M0.02%+29,71713F-HRTimeline
AIGH Capital Management LLC545,101$13M1.18%-45,50013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC371,200$8.85M0.01%-161,60013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC358,397$8.55M<0.01%+17,22613F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.357,317$8.52M0.01%new13F-HRTimelineGroup
KENNEDY CAPITAL MANAGEMENT LLC348,371$8.31M0.15%new13F-HRTimeline
Connor, Clark & Lunn Investment Managem…331,727$7.91M0.01%-45,35513F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY329,684$7.86M<0.01%-99,25013F-HRTimelineGroup
Portolan Capital Management, LLCin group Portolan Capital Management, …328,818$7.84M0.29%-1,021,46513F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC301,040$7.18M0.02%+78,68713F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …292,470$6.98M0.01%+131,80713F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP285,158$6.8M<0.01%+12,05713F-HRTimelineGroup
WASATCH ADVISORS LP279,349$6.66M0.04%-175,68713F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC265,353$6.33M<0.01%+144,37613F-HRTimelineGroup
KORNITZER CAPITAL MANAGEMENT INC /KS264,235$6.3M0.13%-16113F-HRTimeline
SILVERCREST ASSET MANAGEMENT GROUP LLC256,095$6.11M0.04%-12,44013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co254,535$6.07M<0.01%+12,65513F-HRTimelineGroup
Advisors Capital Management, LLC238,204$5.68M0.06%-10,17213F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND234,746$5.6M0.01%+1,70013F-HRTimeline
PALISADE CAPITAL MANAGEMENT, LP231,931$5.53M0.24%-303,95313F-HRTimeline
Nuveen, LLCin group TIAA231,726$5.53M<0.01%-290,40113F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC221,338$5.28M0.09%-33,84613F-HRTimeline
Trexquant Investment LP206,111$4.92M0.03%+75,67713F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC205,369$4.9M<0.01%-147,95013F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC166,567$3.97M<0.01%+101,68713F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding153,714$3.67M+39,587Timeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP145,064$3.46M<0.01%new13F-HRTimelineGroup
Parkman Healthcare Partners LLC144,791$3.45M0.35%+18,64113F-HRTimeline
Empowered Funds, LLC142,338$3.39M0.02%+10,15413F-HRTimeline
HRT FINANCIAL LP115,853$2.76M0.01%+99,99513F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.112,789$2.69M<0.01%-99,17713F-HRTimelineGroup
Man Group plcin group Man Group plc108,761$2.59M<0.01%+61,62313F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP100,374$2.39M<0.01%-148,46613F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/98,745$2.36M<0.01%+30,93513F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp98,018$2.34M<0.01%+9,36413F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources97,733$2.33M<0.01%+6,82413F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …92,736$2.21M<0.01%+65,59413F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO84,804$2.06M<0.01%-3,96713F-HRTimelineGroup
SummitTX Capital, L.P.79,018$1.88M0.05%+11,98513F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO74,433$1.78M<0.01%+39,38713F-HRTimelineGroup
ALGERT GLOBAL LLC70,478$1.68M0.02%+35,70013F-HRTimeline
Orion Porfolio Solutions, LLC69,654$1.66M0.01%-5,24213F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS69,571$1.66M<0.01%-52,58513F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC65,413$1.56M<0.01%-13,69413F-HRTimelineGroup
NORGES BANK60,100$1.43M<0.01%new13F-HRTimeline
FMR LLCin group FMR LLC55,871$1.33M<0.01%+5,45913F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC55,157$1.32M<0.01%-6,70813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.54,888$1.31M<0.01%-6,12413F-HRTimelineGroup
Swiss National Bank53,700$1.28M<0.01%-3,60013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/53,242$1.27M<0.01%+15,45013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC44,793$1.07M<0.01%+2,23113F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd39,923$952K0.01%+19,64013F-HRTimelineGroup
RHUMBLINE ADVISERS39,010$930K<0.01%+63213F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…37,802$902K<0.01%+10,28913F-HR/ATimeline
KBC Group NVin group KBC Group NV36,042$860K<0.01%-89013F-HRTimelineGroup
Diversify Advisory Services, LLCgroup of 2 filers holding31,864$779K+16,104Timeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…31,679$761K<0.01%+22,36413F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd31,916$761K0.02%+8,41513F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.31,748$757K0.05%+6,13413F-HRTimeline
STRS OHIO30,500$727K<0.01%+5,50013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC30,330$723K<0.01%+3,52013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\30,139$719K<0.01%+5,97513F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN29,543$705K<0.01%+16,65113F-HRTimelineGroup
Engineers Gate Manager LP29,480$703K0.01%+11,22413F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC29,047$693K0.03%+8,00213F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.27,100$665K<0.01%+1,83013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …25,221$602K<0.01%-9,16613F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP23,786$567K<0.01%+513F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC22,186$529K<0.01%new13F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc20,548$490K<0.01%-2,63613F-HRTimelineGroup
Schonfeld Strategic Advisors LLC19,930$475K<0.01%-22,48313F-HRTimeline
First Bank & Trust18,591$443K0.07%+2,08713F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…17,008$406K<0.01%+28613F-HRTimelineGroup
Counterpoint Mutual Funds LLC16,510$394K0.04%new13F-HRTimeline
Campbell & CO Investment Adviser LLC16,476$393K0.02%-132,34813F-HRTimeline
Quantinno Capital Management LP16,428$392K<0.01%-29,04813F-HRTimeline
CITIGROUP INCin group CITIGROUP INC16,144$385K<0.01%+12,11713F-HRTimelineGroup
PERKINS CAPITAL MANAGEMENT INC16,140$385K0.29%+72513F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…15,579$372K<0.01%+55113F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding15,141$361K-86Timeline
Jupiter Topco LLCin group Janus Henderson15,037$358K<0.01%13F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL14,462$345K<0.01%-208,52013F-HRTimeline
LPL Financial LLC14,220$339K<0.01%+4,52013F-HRTimeline
Creative Planningin group Creative Planning13,681$326K<0.01%+1,20213F-HRTimelineGroup
Oak Harvest Investment Services13,485$322K0.03%013F-HRTimeline
Summit Global Investmentsin group Summit Global Investments13,078$312K0.02%-64013F-HRTimelineGroup
Birchview Capital, LP12,984$310K0.14%+8413F-HRTimeline
Parallel Advisors, LLC12,931$308K<0.01%-37013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,543$299K<0.01%+10513F-HRTimelineGroup
TritonPoint Partners, LLCin group TritonPoint Partners, LLC10,796$257K0.02%+1913F-HRTimelineGroup
Numerai GP LLC10,348$247K0.02%+2,04113F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd10,175$243K<0.01%new13F-HRTimelineGroup
Lido Advisors, LLCin group Lido Advisors, LLC10,034$239K<0.01%+313F-HRTimelineGroup
Green Alpha Advisors, LLC9,941$237K0.16%-413F-HRTimeline
Police & Firemen's Retirement System of…9,855$235K<0.01%+2,02613F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP9,642$230K<0.01%new13F-HRTimelineGroup
EntryPoint Capital, LLC8,942$213K0.05%new13F-HRTimeline
Cetera Investment Advisers8,632$206K<0.01%-57613F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC8,580$205K<0.01%new13F-HRTimeline
SIMON QUICK ADVISORS, LLC8,561$204K0.01%013F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA8,536$204K<0.01%+36813F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC6,710$160K<0.01%+93113F-HRTimelineGroup
KLP KAPITALFORVALTNING AS6,200$148K<0.01%013F-HRTimeline
State of Wyoming4,923$117K0.01%-4,59913F-HRTimeline
China Universal Asset Management Co., L…4,827$115K0.01%-44913F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\4,478$107K<0.01%+4,38613F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.3,977$94.9K<0.01%+72913F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co3,244$77K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,773$66.1K<0.01%+1,16913F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,717$64.8K<0.01%+34413F-HRTimelineGroup
Quantbot Technologies LP2,599$62K<0.01%-19,46113F-HRTimeline
Farther Finance Advisors, LLC1,806$43.1K<0.01%-58213F-HRTimeline
State of Alaska, Department of Revenue1,553$37K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,191$28.4K<0.01%+33413F-HRTimelineGroup
Global Retirement Partners, LLC1,100$26.2K<0.01%13F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.994$23.7K<0.01%+60713F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA976$23K<0.01%+79913F-HRTimelineGroup
NewEdge Advisors, LLC842$20.1K<0.01%new13F-HRTimeline
Arax Advisory Partners786$18.7K<0.01%+78213F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …707$16.9K<0.01%-5413F-HRTimelineGroup
FIRST HORIZON CORP662$15.8K<0.01%+7513F-HRTimeline
GF FUND MANAGEMENT CO. LTD.631$15K<0.01%-1713F-HRTimeline
Sterling Capital Management LLC603$14.4K<0.01%-36813F-HRTimeline
Nykredit A/Sin group Nykredit A/S597$14.2K<0.01%13F-HRTimelineGroup
Integrated Wealth Concepts LLC531$12.7K<0.01%new13F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.489$11.7K<0.01%-76013F-HRTimelineGroup
Covestor Ltd473$11K0.01%-62313F-HRTimeline
Hughes Financial Services, LLC436$10.4K<0.01%-1013F-HRTimeline
Rossby Financial, LCC429$10.2K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP343$8.34K<0.01%+9313F-HRTimelineGroup
Allworth Financial LP264$6.3K<0.01%+20113F-HRTimeline
NISA INVESTMENT ADVISORS, LLC256$6.11K<0.01%013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/191$4.55K<0.01%new13F-HRTimelineGroup
Essential Partners LLC190$4.53K<0.01%+6113F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.174$4.15K<0.01%new13F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC171$4.08K<0.01%-12,55713F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…157$3.74K<0.01%-613F-HRTimelineGroup
Silver Grove Financial Group, Inc.156$3.72K<0.01%new13F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK139$3.31K<0.01%013F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…139$3.31K<0.01%+11913F-HRTimelineGroup
Versant Capital Management, Inc126$3K<0.01%-12013F-HRTimeline
BFSG, LLC90$2.15K<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…87$2.08K<0.01%-34613F-HRTimelineGroup
IFP Advisors, Inc60$1.43K<0.01%+813F-HRTimeline
ROTHSCHILD INVESTMENT LLC54$1.29K<0.01%-413F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management50$1.19K<0.01%013F-HRTimelineGroup
Clearstead Advisors, LLC48$1.15K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.47$1.12K<0.01%013F-HRTimeline
True Wealth Design, LLC42$1K<0.01%+4013F-HRTimeline
GAMMA Investing LLC19$453<0.01%-2713F-HRTimeline
Investors Portfolio Services LLC18$429<0.01%013F-HRTimeline
SJS Investment Consulting Inc.15$358<0.01%-413F-HRTimeline
Smartleaf Asset Management LLC8$213<0.01%013F-HRTimeline
Caitong International Asset Management …6$143<0.01%new13F-HRTimeline
Fortitude Family Office, LLC1$24<0.01%new13F-HRTimeline
Freestone Grove Partners LP1$24<0.01%new13F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH0$00%013F-HRTimelineGroupValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.