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NASDAQ: CSTL
Castle Biosciences Inc Stock Ownership - Who owns Castle Biosciences?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Castle Biosciences Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Derek J. MaetzoldPres. Chief Exec. Officer2025-12-17509$40.04
$20.38kSell
Kristen M. OelschlagerChief Operating Officer2025-12-1714,888$39.31
$585.29kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-12-1612,821$38.55
$494.30kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-12-1518,513$38.75
$717.32kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-12-151,012$39.30
$39.78kSell
Frank StokesChief Financial Officer2025-12-114,496$37.45
$168.38kSell
Tobin W. JuvenalChief Commercial Officer2025-12-1113,200$37.48
$494.74kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-12-106,070$38.02
$230.78kSell
Frank StokesChief Financial Officer2025-12-102,758$38.02
$104.86kSell
Kristen M. OelschlagerChief Operating Officer2025-12-102,552$38.02
$97.03kSell

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Net Insider Buy/Sell (L12M) Ownership

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CSTL Shareholders

What type of owners hold Castle Biosciences Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc10.93%3,189,896$125.81MInstitution
Vanguard Group Inc7.44%2,172,318$85.68MInstitution
Principal Financial Group Inc6.15%1,794,355$70.77MInstitution
Portolan Capital Management LLC5.19%1,515,111$59.76MInstitution
Dimensional Fund Advisors LP5.05%1,474,089$58.14MInstitution
Sofinnova Healthquest Partners LP4.91%1,433,577$56.54MInsider
Nuveen LLC3.28%957,081$37.75MInstitution
Braidwell LP2.82%822,735$32.45MInstitution
Derek J. Maetzold2.55%743,439$29.32MInsider
State Street Corp2.48%724,080$28.56MInstitution

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CSTL vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSTL85.72%14.28%Net SellingNet Selling
OPK19.98%80.02%Net BuyingNet Buying
CDNA77.88%22.12%Net SellingNet Selling
FLGT55.73%41.68%Net SellingNet Selling
NEO72.71%27.29%Net BuyingNet Selling
View Top Diagnostic & Research Stocks

Castle Biosciences Stock Ownership FAQ

Who owns Castle Biosciences?

Castle Biosciences (NASDAQ: CSTL) is owned by 90.88% institutional shareholders, 15.14% Castle Biosciences insiders, and 0.00% retail investors. Sofinnova Healthquest Partners LP is the largest individual Castle Biosciences shareholder, owning 1.43M shares representing 4.91% of the company. Sofinnova Healthquest Partners LP's Castle Biosciences shares are currently valued at $56.54M.

If you're new to stock investing, here's how to buy Castle Biosciences stock.
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