Y-mAbs Therapeutics (YMAB) Insider Trading & Ownership $8.55 +0.01 (+0.12%) Closing price 08/29/2025 04:00 PM EasternExtended Trading$8.54 -0.01 (-0.06%) As of 08/29/2025 07:07 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 EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Y-mAbs Therapeutics (NASDAQ:YMAB) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage19.70%Number OfInsiders Buying(Last 12 Months)0Number OfInsiders Selling(Last 12 Months)2Amount OfInsider Selling(Last 12 Months)$1.34M Get YMAB Insider Trade Alerts Want to know when executives and insiders are buying or selling Y-mAbs Therapeutics stock? 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YMAB Insider Buying and Selling by Quarter Y-mAbs Therapeutics 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 TransactionDetails3/7/2025Michael J RossiCEOSell3,917$5.20$20,368.40 3/7/2025Thomas GadInsiderSell10,810$5.23$56,536.30 9/16/2024Thomas GadInsiderSell30,000$12.97$389,100.00 9/13/2024Thomas GadInsiderSell65,000$13.47$875,550.00 (Data available from 1/1/2013 forward) YMAB Insider Trading Activity - Frequently Asked Questions Who is on Y-mAbs Therapeutics' Insider Roster? The list of insiders at Y-mAbs Therapeutics includes Biotech Aps Wg, Bo Kruse, Gerard Ber, Johan Wedell-Wedellsborg, Joris Wilms, Michael J Rossi, Thomas Gad, and Vignesh Rajah. Learn more on insiders at YMAB. What percentage of Y-mAbs Therapeutics stock is owned by insiders? 19.70% of Y-mAbs Therapeutics stock is owned by insiders. Learn more on YMAB's insider holdings. Which Y-mAbs Therapeutics insiders have been buying company stock? The following insiders have purchased YMAB shares in the last 24 months: Biotech Aps Wg ($1,070,726.02), and Johan Wedell-Wedellsborg ($343,212.84). How much insider buying is happening at Y-mAbs Therapeutics? Insiders have purchased a total of 223,399 YMAB shares in the last 24 months for a total of $1,413,938.86 bought. Which Y-mAbs Therapeutics insiders have been selling company stock? The following insiders have sold YMAB shares in the last 24 months: Bo Kruse ($378,647.97), Gerard Ber ($8,664.00), Joris Wilms ($73,450.00), Michael J Rossi ($20,368.40), Thomas Gad ($3,194,799.30), and Vignesh Rajah ($28,282.83). How much insider selling is happening at Y-mAbs Therapeutics? Insiders have sold a total of 390,882 Y-mAbs Therapeutics shares in the last 24 months for a total of $3,704,212.50 sold. Y-mAbs Therapeutics Key ExecutivesMr. Thomas Gad (Age 53)Founder, Chief Business Officer & Vice Chairman Compensation: $1.05M1 recent tradesMr. Bo Kruse (Age 51)Executive VP, Secretary, Treasurer & CFO Compensation: $685.02kMs. Susan Smith (Age 53)Senior VP & Chief Commercial Officer Compensation: $710kMr. Michael Rossi (Age 53)CEO, President & Director 1 recent tradesMr. Joris Wiel Jan Wilms (Age 50)Senior VP & COO Dr. Torben Lund-Hansen M.Sc. (Age 73)Ph.D., Senior VP & CTO Dr. Steen Lisby M.D. (Age 60)M.Sc., Senior VP & Chief Scientific Officer Compensation: $393.99kMs. Courtney DuganVice President of Investor RelationsDr. Vignesh Rajah M.B.A. (Age 59)MBBS, Senior VP & Chief Medical Officer Compensation: $406.27k More Insider Trading Tools from MarketBeat Related Companies SDGR Insider Trading AVDL Insider Trading ARDX Insider Trading JANX Insider Trading HROW Insider Trading VERA Insider Trading AMPH Insider Trading SNDX Insider Trading ETNB Insider Trading COGT Insider Trading 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 Costco Faces Downgrades, Death Cross, Insider SellingReynolds Consumer Products Stock Price: Insiders Signal a BottomBuy, Sell, or Hold? Insiders Pile Into These 3 Healthcare StocksInsiders Trade Millions in NVIDIA-Linked Navitas, Hims, & Shift45 Stocks Insiders Are Selling That Analysts Say Buy This page (NASDAQ:YMAB) was last updated on 8/30/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredHe Called Nvidia at $1.10. Now, He Says THIS Stock Will…The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. 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