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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. Officer2025-04-21165$21.52
$3.55kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-211,236$21.52
$26.60kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-212,017$21.52
$43.40kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-211,731$21.52
$37.25kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-21165$21.52
$3.55kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-21165$21.52
$3.55kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-21165$21.52
$3.55kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-09137$20.22
$2.77kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-091,023$20.22
$20.68kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-04-091,669$20.22
$33.75kSell

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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 Inc10.25%2,921,309$58.69MInstitution
Vanguard Group Inc6.43%1,832,535$36.82MInstitution
Wasatch Advisors LP6.30%1,796,088$36.08MInstitution
Principal Financial Group Inc5.03%1,435,665$28.84MInstitution
Sofinnova Healthquest Partners LP5.03%1,433,577$28.80MInsider
Dimensional Fund Advisors LP3.51%999,466$20.08MInstitution
Citadel Advisors LLC2.93%834,512$16.77MInstitution
Ubs Group Ag2.85%812,600$16.33MInstitution
Derek J. Maetzold2.81%801,338$16.10MInsider
Portolan Capital Management LLC2.72%776,579$15.60MInstitution

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CSTL vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSTL85.52%14.48%Net SellingNet Selling
FLGT45.21%54.79%Net SellingNet Selling
MYGN92.22%7.78%Net SellingNet Selling
LAB55.81%44.19%Net BuyingNet Buying
PSNL58.46%40.94%Net Buying
View Top Diagnostic & Research Stocks

Castle Biosciences Stock Ownership FAQ

Who owns Castle Biosciences?

Castle Biosciences (NASDAQ: CSTL) is owned by 92.57% institutional shareholders, 15.67% Castle Biosciences insiders, and 0.00% retail investors. Sofinnova Healthquest Partners LP is the largest individual Castle Biosciences shareholder, owning 1.43M shares representing 5.03% of the company. Sofinnova Healthquest Partners LP's Castle Biosciences shares are currently valued at $28.46M.

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