Castle Biosciences (CSTL) Insider Trading & Ownership $19.36 -0.29 (-1.48%) Closing price 04:00 PM EasternExtended Trading$19.36 0.00 (-0.03%) As of 06:42 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Castle Biosciences (NASDAQ:CSTL) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage6.50%Number OfInsiders Buying(Last 12 Months)0Number OfInsiders Selling(Last 12 Months)4Amount OfInsider Selling(Last 12 Months)$2.40M Get CSTL Insider Trade Alerts Want to know when executives and insiders are buying or selling Castle Biosciences stock? 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Email Address CSTL Insider Buying and Selling by Quarter Castle Biosciences Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails4/21/2025Derek J MaetzoldInsiderSell1,236$21.52$26,598.72 4/8/2025Derek J MaetzoldInsiderSell213$20.03$4,266.39 3/26/2025Derek J MaetzoldInsiderSell1,236$20.30$25,090.80 3/10/2025Derek J MaetzoldInsiderSell2,130$19.52$41,577.60 3/7/2025Derek J MaetzoldInsiderSell22,639$20.12$455,496.68 2/5/2025Daniel BradburyDirectorSell7,867$28.17$221,613.39 1/13/2025Derek J MaetzoldInsiderSell986$28.03$27,637.58 1/6/2025Daniel BradburyDirectorSell7,867$29.14$229,244.38 1/6/2025Derek J MaetzoldInsiderSell2,715$29.62$80,418.30 12/17/2024Derek J MaetzoldInsiderSell9,364$28.34$265,375.76 Get Insider Trades Delivered To Your InboxEnter your email address below to receive a concise daily summary of insider buying activity, insider selling activity and changes in hedge fund holdings. 12/5/2024Derek J MaetzoldInsiderSell1,972$31.35$61,822.20 11/15/2024Frank StokesCFOSell6,923$29.93$207,205.39 11/12/2024Derek J MaetzoldInsiderSell1,972$34.15$67,343.80 11/5/2024Tobin W JuvenalInsiderSell3,507$35.56$124,708.92 10/14/2024Derek J MaetzoldInsiderSell1,972$32.27$63,636.44 10/8/2024Derek J MaetzoldInsiderSell986$30.27$29,846.22 10/7/2024Daniel BradburyDirectorSell7,867$29.44$231,604.48 10/4/2024Derek J MaetzoldInsiderSell986$28.73$28,327.78 8/12/2024Daniel BradburyDirectorSell7,883$26.65$210,081.95 (Data available from 1/1/2013 forward) CSTL Insider Trading Activity - Frequently Asked Questions Who is on Castle Biosciences' Insider Roster? The list of insiders at Castle Biosciences includes Daniel Bradbury, Derek J Maetzold, Ellen Goldberg, Frank Stokes, Kristen M Oelschlager, Tiffany Olson, and Tobin W Juvenal. Learn more on insiders at CSTL. What percentage of Castle Biosciences stock is owned by insiders? 6.50% of Castle Biosciences stock is owned by insiders. Learn more on CSTL's insider holdings. Which Castle Biosciences insiders have been selling company stock? The following insiders have sold CSTL shares in the last 24 months: Daniel Bradbury ($3,668,616.44), Derek J Maetzold ($2,435,875.46), Frank Stokes ($464,205.39), Kristen M Oelschlager ($361,139.92), and Tobin W Juvenal ($124,708.92). How much insider selling is happening at Castle Biosciences? Insiders have sold a total of 306,538 Castle Biosciences shares in the last 24 months for a total of $7,054,546.13 sold. Castle Biosciences Key ExecutivesMr. Derek J. Maetzold (Age 62)Founder, CEO, President & Director Compensation: $1.45M5 recent tradesMr. Frank Stokes (Age 53)CFO & Treasurer Compensation: $849.36kMs. Kristen M. Oelschlager R.N. (Age 56)Chief Operating Officer Compensation: $782.7kMr. Tobin W. Juvenal (Age 64)Chief Commercial Officer Compensation: $782.7kCamilla ZuckeroVice President of Investor Relations & Corporate AffairsMs. Alice Bahner IzzoSenior Vice President of MarketingMr. Kevin DomanVice President of SalesMs. Keli GreenbergVP of Human Resources & Executive Director of Human ResourcesDr. Robert W. Cook Ph.D. (Age 52)Senior Vice President of Research & Development Dr. Matthew Goldberg M.D.Senior Vice President of Medical More Insider Trading Tools from MarketBeat Related Companies PACS Insider Transactions LFST Insider Transactions NHC Insider Transactions GRAL Insider Transactions TDOC Insider Transactions VRDN Insider Transactions AHCO Insider Transactions AGL Insider Transactions PNTG Insider Transactions AVAH Insider Transactions Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles Strategy Insiders Buy In While Analysts Predict Big UpsideThe Bottom Is in For These 3 Small-Cap Stocks Insiders Are Buying3 Catalysts Driving Plug Power’s Turnaround CaseInsider Selling Hits Market Leaders—Should You Be Worried?Insiders Spent Millions on These 3 Stocks Over the Past 2 Months This page (NASDAQ:CSTL) was last updated on 8/8/2025 by MarketBeat.com Staff From Our PartnersAmazon’s big Bitcoin embarrassmentBitcoin just passed Amazon in total market cap — but most investors are missing the bigger opportunity. 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