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Disclosery

CSTL CASTLE BIOSCIENCES INC

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COMMON STOCK (common), issuer CIK 1447362

169 managers (173 13F filers) reported a position in CSTL shares at 2025-09-30, 26,648,750 shares in all. 36 filers opened a position and 15 filers sold out during the quarter.

Managers
169
13F filers
173
New
36
Added
62
Reduced
53
Sold out
15
Shares held by filers
26,648,750

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

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
MAETZOLD DEREK Jdirector, officer (Pres. & Chief Exec. Officer)2026-10-05-2,718 S$35.566Form 4
MAETZOLD DEREK Jdirector, officer (Pres. & Chief Exec. Officer)2026-10-05-3,198 S$35.566Form 4
MAETZOLD DEREK Jdirector, officer (Pres. & Chief Exec. Officer)2026-10-05-8,580 S$35.566Form 4
MAETZOLD DEREK Jdirector, officer (Pres. & Chief Exec. Officer)2026-10-05+8,165 M$2.39Form 4

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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.3,189,896$72.6M<0.01%+35,21713F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,172,318$49.5M<0.01%+2,29013F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding1,794,431$40.9M-4,619Timeline
Portolan Capital Management, LLCin group Portolan Capital Management, …1,515,111$34.5M1.87%+25,53913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,474,089$33.6M0.01%+96,08413F-HRTimelineGroup
Nuveen, LLCin group TIAA957,081$21.8M0.01%-116,02613F-HRTimelineGroup
BRAIDWELL LP822,735$18.7M0.56%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP724,080$16.5M<0.01%+16,39313F-HRTimelineGroup
AIGH Capital Management LLC707,287$16.1M5.64%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC698,610$15.9M<0.01%+8,68413F-HRTimelineGroup
WASATCH ADVISORS LP669,120$15.2M0.08%-380,65313F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE648,351$14.8M0.02%-65,39113F-HRTimelineGroup
PALISADE CAPITAL MANAGEMENT, LP638,656$14.5M0.4%+63,54013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC575,089$13.1M0.01%+146,69213F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC562,600$12.8M0.02%-107,90013F-HRTimeline
SCHRODER INVESTMENT MANAGEMENT GROUP494,950$11.1M0.01%-153,62213F-HRTimeline
Parkman Healthcare Partners LLC475,568$10.8M1.19%+123,30613F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC451,652$10.3M0.02%-92,59813F-HRTimelineGroup
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT…in group SUMMIT PARTNERS PUBLIC ASSET …400,000$9.11M0.3%new13F-HRTimelineGroup
SILVERCREST ASSET MANAGEMENT GROUP LLC367,888$8.38M0.06%+87,92913F-HRTimeline
UBS Group AGgroup of 2 filers holding348,822$7.94M-117,768Timeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC345,099$7.86M<0.01%+71,65613F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.336,958$7.67M0.02%new13F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…335,891$7.65M0.02%+209,46013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/315,370$7.18M<0.01%-67,37513F-HR/ATimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP282,267$6.43M<0.01%+2,44213F-HRTimelineGroup
KORNITZER CAPITAL MANAGEMENT INC /KS278,314$6.34M0.13%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY269,631$6.14M<0.01%+102,04313F-HR/ATimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC256,233$5.83M<0.01%-116,23413F-HRTimelineGroup
Advisors Capital Management, LLC254,200$5.79M0.07%+8,33313F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC250,915$5.71M<0.01%-637,60013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co238,154$5.42M<0.01%+3,13913F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND230,046$5.24M0.01%+14,21613F-HRTimeline
Qube Research & Technologies Ltd220,961$5.03M0.01%+28,40813F-HRTimeline
SUMMIT WEALTH GROUP LLC / CO122,494$4.51M0.48%new13F-HRTimeline
Trexquant Investment LP178,442$4.06M0.04%-139,63013F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC177,180$4.03M0.09%+136,43013F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …156,513$3.56M0.01%-4,66213F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS139,914$3.19M<0.01%+40,62113F-HRTimelineGroup
Birchview Capital, LP110,600$2.52M1.9%013F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources99,787$2.27M<0.01%+54013F-HRTimelineGroup
Empowered Funds, LLC98,180$2.24M0.02%+57,43013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp94,016$2.14M<0.01%+4,13313F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.92,614$2.11M<0.01%-55,57613F-HRTimelineGroup
Schonfeld Strategic Advisors LLC87,691$2M0.01%+19,76513F-HRTimeline
TUDOR INVESTMENT CORP ET AL85,435$1.95M0.01%+8,98113F-HR/ATimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC82,512$1.88M<0.01%+17,24013F-HRTimelineGroup
Orion Porfolio Solutions, LLC76,344$1.74M0.01%-18813F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC73,068$1.66M<0.01%-36,67513F-HR/ATimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC66,928$1.52M<0.01%-3,55013F-HRTimelineGroup
ALGERT GLOBAL LLC57,895$1.32M0.02%-127,28613F-HR/ATimeline
Swiss National Bank56,000$1.28M<0.01%+1,70013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.55,840$1.27M<0.01%+15,41113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC50,842$1.16M<0.01%+1,61213F-HRTimelineGroup
Cubist Systematic Strategies, LLC50,304$1.15M0.02%new13F-HRTimeline
HRT FINANCIAL LP47,239$1.07M<0.01%+28,41313F-HRTimeline
Engineers Gate Manager LP46,506$1.06M0.01%-20,74613F-HRTimeline
SummitTX Capital, L.P.45,000$1.02M0.04%new13F-HRTimeline
RHUMBLINE ADVISERS43,758$996K<0.01%-1,63913F-HRTimeline
TRITONPOINT WEALTH, LLCin group TritonPoint Partners, LLC40,777$928K0.08%013F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…35,800$815K<0.01%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding35,600$811K-4,641Timeline
Legal & General Group Plcin group Legal & General Group Plc34,908$795K<0.01%013F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.33,370$760K<0.01%013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC33,233$749K<0.01%-78513F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/32,593$743K<0.01%+6,18613F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …29,883$680K<0.01%-24,72713F-HRTimelineGroup
Dynamic Technology Lab Private Ltd29,310$667K0.11%new13F-HRTimeline
FMR LLCin group FMR LLC28,542$650K<0.01%+4,54213F-HRTimelineGroup
PERKINS CAPITAL MANAGEMENT INC28,145$641K0.56%+15013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO27,778$633K<0.01%+1,11513F-HR/ATimelineGroup
Campbell & CO Investment Adviser LLC26,996$615K0.05%new13F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO26,771$610K<0.01%-4,35913F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…24,622$561K<0.01%+213F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…24,225$552K<0.01%-18,62813F-HRTimelineGroup
MACKENZIE FINANCIAL CORP24,204$551K<0.01%013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC24,121$549K<0.01%new13F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN23,979$546K<0.01%+3,67913F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP23,371$532K<0.01%-65213F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC22,884$521K<0.01%new13F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC21,398$487K<0.01%new13F-HRTimeline
Graham Capital Management, L.P.21,133$481K0.02%-20,65013F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC19,887$453K0.04%+77013F-HRTimelineGroup
First Bank & Trust19,799$451K0.08%-15213F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…19,128$436K0.01%-22,17313F-HRTimelineGroup
Parallel Advisors, LLC17,786$405K0.01%-10,10713F-HRTimeline
Oak Harvest Investment Services16,883$384K0.04%013F-HRTimeline
CAPSTONE INVESTMENT ADVISORS, LLCin group CAPSTONE INVESTMENT ADVISORS,…16,677$380K<0.01%new13F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\16,642$379K<0.01%-45,10113F-HRTimelineGroup
Creative Planningin group Creative Planning16,276$371K<0.01%+5,16513F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…15,881$362K<0.01%013F-HRTimelineGroup
Verition Fund Management LLC15,642$356K<0.01%-15,89713F-HRTimeline
AlphaQuest LLC14,544$331K0.02%+12,44913F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding14,394$328K-2,282Timeline
FOX RUN MANAGEMENT, L.L.C.13,820$315K0.05%new13F-HRTimeline
SIMON QUICK ADVISORS, LLC13,562$309K0.01%013F-HRTimeline
DIVERSIFY WEALTH MANAGEMENT, LLCin group Diversify Advisory Services, …11,747$305K0.02%-57513F-HRTimelineGroup
HARBOR CAPITAL ADVISORS, INC.13,171$300K0.02%-7,22813F-HRTimeline
SG Americas Securities, LLC13,061$297K<0.01%new13F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC12,392$282K<0.01%+10313F-HRTimeline
Summit Global Investmentsin group Summit Global Investments12,352$281K0.02%-3,29713F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…12,207$278K<0.01%+11813F-HRTimeline
BAILARD, INC.11,400$260K0.01%new13F-HRTimeline
STEPHENS INC /AR/in group Stephens Investment Managemen…11,122$253K<0.01%-26413F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co10,713$239K<0.01%013F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC10,327$235K<0.01%new13F-HRTimelineGroup
Glenmede Investment Management, LP10,199$232K<0.01%new13F-HRTimeline
Lido Advisors, LLCin group Lido Advisors, LLC10,036$229K<0.01%+513F-HRTimelineGroup
Atom Investors LP9,827$224K0.02%new13F-HRTimeline
STRS OHIO9,800$223K<0.01%-1,90013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …9,539$217K<0.01%-77713F-HRTimelineGroup
Green Alpha Advisors, LLC9,538$217K0.21%new13F-HRTimeline
LPL Financial LLC9,397$214K<0.01%new13F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson9,137$208K<0.01%new13F-HRTimelineGroup
KLP KAPITALFORVALTNING AS8,900$203K<0.01%+4,10013F-HRTimeline
Police & Firemen's Retirement System of…7,829$178K<0.01%+1,99213F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC5,705$130K<0.01%+1,15813F-HRTimelineGroup
China Universal Asset Management Co., L…5,085$116K0.01%-71413F-HRTimeline
CITIGROUP INCin group CITIGROUP INC4,250$96.8K<0.01%-9,82213F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,666$83.5K<0.01%+87513F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.3,137$71.4K<0.01%+15013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…2,508$57.1K<0.01%+97613F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD2,400$54.6K<0.01%new13F-HRTimeline
Point72 (DIFC) Ltd2,386$54.3K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,373$54K<0.01%-52713F-HRTimelineGroup
Aquatic Capital Management LLC2,335$53.2K<0.01%-16,94513F-HRTimeline
Covestor Ltd2,069$47K0.03%-31113F-HRTimeline
Sterling Capital Management LLC1,960$44.6K<0.01%+1,19313F-HRTimeline
CWM, LLCin group CWM, LLC1,911$44K<0.01%+85313F-HRTimelineGroup
State of Alaska, Department of Revenue1,553$35K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC1,512$34K<0.01%new13F-HRTimeline
Farther Finance Advisors, LLC1,392$31.7K<0.01%+1,39113F-HRTimeline
Global Retirement Partners, LLC1,100$25K<0.01%-6313F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA897$20K<0.01%-9,67613F-HRTimelineGroup
AMALGAMATED BANK893$20K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC803$18.3K<0.01%new13F-HRTimeline
Caitong International Asset Management …728$16.6K0.01%+62213F-HRTimeline
Hughes Financial Services, LLC435$15.1K<0.01%013F-HRTimeline
GF FUND MANAGEMENT CO. LTD.624$14.2K<0.01%-9213F-HRTimeline
Arax Advisory Partners574$13.1K<0.01%new13F-HRTimeline
FIRST HORIZON CORP447$10.2K<0.01%13F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …461$10K<0.01%+3313F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.408$9.26K<0.01%+20913F-HRTimelineGroup
Rossby Financial, LCC382$8.79K<0.01%+24013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC364$8.29K<0.01%+4413F-HRTimeline
QUADRANT CAPITAL GROUP LLC336$7.65K<0.01%new13F-HRTimeline
Versant Capital Management, Inc181$4.12K<0.01%+5513F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK139$3.17K<0.01%-5813F-HRTimelineGroup
Essential Partners LLC123$2.8K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…115$2.62K<0.01%+513F-HRTimelineGroup
Point72 Europe (London) LLP112$2.56K<0.01%new13F-HRTimeline
BFSG, LLC90$2.05K<0.01%013F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.86$2K<0.01%013F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC55$1.25K<0.01%-3013F-HRTimeline
SBI Securities Co., Ltd.53$1.21K<0.01%+313F-HRTimeline
IFP Advisors, Inc52$1.18K<0.01%+1613F-HR/ATimeline
GAMMA Investing LLC52$1.18K<0.01%-8013F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management50$1.14K<0.01%013F-HRTimelineGroup
SIGNATUREFD, LLC45$1.02K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.40$911<0.01%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\26$592<0.01%new13F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP25$568<0.01%013F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…20$455<0.01%-2713F-HRTimelineGroup
Allworth Financial LP19$433<0.01%+1413F-HRTimeline
Missouri Trust & Investment Co19$433<0.01%013F-HRTimeline
Clearstead Advisors, LLC12$274<0.01%new13F-HRTimeline
Advisory Services Network, LLC7$159<0.01%new13F-HRTimeline
Larson Financial Group LLC1$23<0.01%new13F-HRTimeline
True Wealth Design, LLC1$23<0.01%new13F-HRTimeline

Events

  • MAETZOLD DEREK J disposed of 6,331 CSTL shares on 2026-10-05, Form 4 filed 2026-10-07. 0001628280-26-065327

    Accepted , ingested