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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 Inc10.33%2,983,540$55.94MInstitution
Vanguard Group Inc7.09%2,047,565$38.39MInstitution
Principal Financial Group Inc5.08%1,467,873$27.52MInstitution
Sofinnova Healthquest Partners LP4.97%1,433,577$26.88MInsider
Portolan Capital Management LLC4.38%1,265,223$23.72MInstitution
Dimensional Fund Advisors LP4.16%1,200,222$22.50MInstitution
Wasatch Advisors LP3.46%998,455$18.72MInstitution
Wellington Management Group LLP2.87%828,528$15.53MInstitution
Derek J. Maetzold2.78%801,338$15.03MInsider
State Street Corp2.48%715,028$13.41MInstitution

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CSTL vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSTL85.10%14.90%Net SellingNet Selling
PSNL60.27%39.73%Net BuyingNet Selling
MYGN91.64%8.36%Net SellingNet Selling
FLGT53.50%42.54%Net SellingNet Selling
LAB56.19%43.81%Net BuyingNet Selling
View Top Diagnostic & Research Stocks

Castle Biosciences Stock Ownership FAQ

Who owns Castle Biosciences?

Castle Biosciences (NASDAQ: CSTL) is owned by 89.33% institutional shareholders, 15.64% Castle Biosciences insiders, and 0.00% retail investors. Sofinnova Healthquest Partners LP is the largest individual Castle Biosciences shareholder, owning 1.43M shares representing 4.97% of the company. Sofinnova Healthquest Partners LP's Castle Biosciences shares are currently valued at $26.88M.

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