WallStreetZenWallStreetZen

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. Officer2025-09-021,339$23.93
$32.04kSell
Kristen M. OelschlagerChief Operating Officer2025-08-2712,677$22.02
$279.13kSell
Kristen M. OelschlagerChief Operating Officer2025-08-2718,007$21.69
$390.57kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-08-151,339$20.04
$26.83kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-08-1343,019$19.50
$839.04kSell
Kristen M. OelschlagerChief Operating Officer2025-08-082,804$19.36
$54.29kSell
Tobin W. JuvenalChief Commercial Officer2025-08-084,294$19.36
$83.13kSell
Frank StokesChief Financial Officer2025-08-084,356$19.36
$84.33kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-08-0823,972$19.36
$464.10kSell
Derek J. MaetzoldPres. Chief Exec. Officer2025-06-276,924$20.30
$140.56kSell

1 of 24

CSTL insiders have sold more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership

Be the first to know when CSTL insiders and whales buy or sell their stock.

CSTL Shareholders

What type of owners hold Castle Biosciences Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Blackrock Inc10.88%3,154,679$68.20MInstitution
Vanguard Group Inc7.48%2,170,028$46.92MInstitution
Principal Financial Group Inc6.20%1,798,974$38.89MInstitution
Portolan Capital Management LLC5.13%1,489,572$32.20MInstitution
Sofinnova Healthquest Partners LP4.94%1,433,577$30.99MInsider
Dimensional Fund Advisors LP4.75%1,378,005$29.79MInstitution
Nuveen LLC3.70%1,073,107$23.20MInstitution
Wasatch Advisors LP3.62%1,049,773$22.70MInstitution
Citadel Advisors LLC3.06%888,515$19.21MInstitution
Braidwell LP2.84%822,735$17.79MInstitution

1 of 3

CSTL vs Diagnostic & Research Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSTL85.56%14.44%Net SellingNet Selling
FLGT53.12%42.23%Net SellingNet Selling
MYGN91.33%8.67%Net SellingNet Selling
LAB54.17%45.83%Net BuyingNet Buying
PSNL62.59%37.41%Net SellingNet Selling
View Top Diagnostic & Research Stocks

Castle Biosciences Stock Ownership FAQ

Who owns Castle Biosciences?

Castle Biosciences (NASDAQ: CSTL) is owned by 91.48% institutional shareholders, 15.44% Castle Biosciences insiders, and 0.00% retail investors. Sofinnova Healthquest Partners LP is the largest individual Castle Biosciences shareholder, owning 1.43M shares representing 4.94% of the company. Sofinnova Healthquest Partners LP's Castle Biosciences shares are currently valued at $31.18M.

If you're new to stock investing, here's how to buy Castle Biosciences stock.
©2025 WallStreetZen
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletter
Stock Tools
Top Performing AnalystsStock ScreenerStock ForecastTrending StocksStrong Buy StocksHighest Earnings StocksBest Dividend Paying StocksStatisticsStock Market SectorsStock Market IndustriesHow to Buy Stocks Online
Stock Ideas
Buy The DipBiggest Stock Gainers TodayBiggest Stock Losers Today52 Week High Stocks52 Week Low StocksMost Active Stocks TodayMost Undervalued StocksBest Penny Stocks to Buy NowBest Stocks Under $5Best Stocks Under $10
WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.