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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. Officer2025-12-022,678$39.23
$105.06kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-11-264,258$40.09
$170.70kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-11-255,115$40.05
$204.85kSell
Tobin W. JuvenalChief Commercial Officer2025-11-204,693$3.38
$15.86kBuy
Tobin W. JuvenalChief Commercial Officer2025-11-204,693$35.58
$166.98kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-11-182,678$34.02
$91.11kSell
Tobin W. JuvenalChief Commercial Officer2025-11-12200$35.40
$7.08kSell
Tobin W. JuvenalChief Commercial Officer2025-11-12200$35.40
$7.08kSell
Tobin W. JuvenalChief Commercial Officer2025-11-12200$35.40
$7.08kSell
Tobin W. JuvenalChief Commercial Officer2025-11-12200$3.38
$676.00Buy

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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$123.26MInstitution
Vanguard Group Inc7.44%2,172,318$83.94MInstitution
Principal Financial Group Inc6.15%1,794,355$69.33MInstitution
Portolan Capital Management LLC5.19%1,515,111$58.54MInstitution
Dimensional Fund Advisors LP5.05%1,474,089$56.96MInstitution
Sofinnova Healthquest Partners LP4.91%1,433,577$55.39MInsider
Nuveen LLC3.28%957,081$36.98MInstitution
Braidwell LP2.82%822,735$31.79MInstitution
Derek J. Maetzold2.56%747,965$28.90MInsider
State Street Corp2.48%724,080$27.98MInstitution

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CSTL vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSTL85.73%14.27%Net SellingNet Selling
OPK19.98%80.02%Net BuyingNet Buying
NEOG98.02%1.98%Net BuyingNet Buying
CDNA77.88%22.12%Net SellingNet Buying
FLGT55.73%41.68%Net SellingNet 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, 15.13% 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 $55.39M.

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