Y-mAbs Therapeutics (YMAB) Institutional Ownership $8.55 +0.01 (+0.12%) Closing price 08/27/2025 04:00 PM EasternExtended Trading$8.55 0.00 (0.00%) As of 07:00 AM 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 Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Y-mAbs Therapeutics (NASDAQ:YMAB)CurrentInstitutional OwnershipPercentage70.85%Number ofInstitutional Buyers(last 12 months)59TotalInstitutional Inflows(last 12 months)$62.67MNumber ofInstitutional Sellers(last 12 months)30TotalInstitutional Outflows(last 12 months)$10.52M Get YMAB Insider Trade Alerts Want to know when executives and insiders are buying or selling Y-mAbs Therapeutics stock? 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Skip Chart & View Institutional Buying and Selling Data YMAB Institutional Buying and Selling by Quarter Y-mAbs Therapeutics Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/15/2025 Tower Research Capital LLC TRC 11,494$52K0.0%+129.0%0.025% 8/15/2025 Bridgeway Capital Management LLC55,700$251K0.0%+123.7%0.123% 8/15/2025 Bank of America Corp DE274,164$1.24M0.0%-2.9%0.603% 8/15/2025 Acorn Capital Advisors LLC3,418,995$15.42M10.1%+5.7%7.524% 8/14/2025 Nantahala Capital Management LLC351,878$1.59M0.1%N/A0.774% 8/14/2025 Jane Street Group LLC60,873$275K0.0%N/A0.134% 8/14/2025 Raymond James Financial Inc.7,701$35K0.0%N/A0.017% 8/14/2025 Federated Hermes Inc.119,425$539K0.0%-22.2%0.263% 8/13/2025 Jump Financial LLC61,500$277K0.0%+61.5%0.135% 8/13/2025 Marshall Wace LLP40,181$181K0.0%N/A0.088% Get the Latest News and Ratings for YMAB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Y-mAbs Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 8/13/2025 Stonepine Capital Management LLC285,300$1.29M1.3%+117.5%0.628% 8/13/2025 Invesco Ltd.42,833$193K0.0%+31.6%0.094% 8/12/2025 XTX Topco Ltd86,440$390K0.0%-5.5%0.191% 8/12/2025 Rhumbline Advisers68,399$308K0.0%+26.9%0.151% 8/12/2025 JPMorgan Chase & Co.164,055$740K0.0%-33.7%0.362% 8/8/2025 Intech Investment Management LLC21,674$98K0.0%-18.8%0.048% 8/7/2025 Los Angeles Capital Management LLC10,284$46K0.0%N/A0.023% 7/25/2025 CWM LLC7,121$32K0.0%+203.0%0.016% 6/27/2025 Goldman Sachs Group Inc.201,776$894K0.0%-7.9%0.446% 5/29/2025 Rhumbline Advisers53,909$239K0.0%+4.8%0.119% 5/28/2025 Strs Ohio43,400$192K0.0%N/A0.096% 5/19/2025 Acorn Capital Advisors LLC3,235,387$14.33M9.3%+13.1%7.145% 5/16/2025 Goldman Sachs Group Inc.201,776$894K0.0%-7.9%0.446% 5/16/2025 Jacobs Levy Equity Management Inc.237,511$1.05M0.0%+58.7%0.525% 5/16/2025 AQR Capital Management LLC164,788$730K0.0%+869.3%0.364% 5/15/2025 Cubist Systematic Strategies LLC155,522$689K0.0%+223.9%0.343% 5/14/2025 MetLife Investment Management LLC17,076$76K0.0%-22.9%0.038% 5/14/2025 Stonepine Capital Management LLC131,160$581K0.6%N/A0.290% 5/14/2025 Jump Financial LLC38,079$169K0.0%+14.1%0.084% 5/14/2025 AlphaQuest LLC38,925$172K0.0%+43.4%0.086% 5/14/2025 EntryPoint Capital LLC12,654$56K0.0%N/A0.028% 5/14/2025 Wellington Management Group LLP204,052$904K0.0%+53.1%0.451% 5/13/2025 Brooklyn Investment Group5,923$26K0.0%+4,563.8%0.013% 5/12/2025 Nuveen LLC112,483$498K0.0%N/A0.248% 5/12/2025 Invesco Ltd.32,547$144K0.0%+118.1%0.072% 5/12/2025 Connor Clark & Lunn Investment Management Ltd.11,084$49K0.0%N/A0.024% 5/9/2025 Deutsche Bank AG28,803$128K0.0%-10.7%0.064% 5/9/2025 Charles Schwab Investment Management Inc.277,610$1.23M0.0%-2.4%0.613% 5/8/2025 XTX Topco Ltd91,454$405K0.0%+340.4%0.202% 5/8/2025 Federated Hermes Inc.153,453$680K0.0%+245.0%0.339% This strange black card is showing up across America (Ad)"THIS is the Biggest Economic Story of 2025" While most Americans are focused on tariffs and inflation, the White House just greenlit a $30 trillion upgrade to our financial system. Big firms like JP Morgan and Goldman Sachs are already onboard. And our Wall Street insider expects this change to create more wealth in the next 5 years than major innovations like the computer.Get the full story, before the rest of Wall Street catches on, right here.5/7/2025 Corton Capital Inc.12,432$55K0.2%N/A0.027% 5/1/2025 Rice Hall James & Associates LLC103,642$459K0.0%-4.5%0.229% 4/30/2025 Alps Advisors Inc.33,309$148K0.0%-8.0%0.074% 4/17/2025 Exchange Traded Concepts LLC26,762$119K0.0%+107.9%0.059% 4/14/2025 Wesbanco Bank Inc.55,000$244K0.0%N/A0.122% 4/8/2025 Rhumbline Advisers53,909$239K0.0%+4.8%0.119% 3/24/2025 Wellington Management Group LLP133,263$1.04M0.0%-2.5%0.295% 2/26/2025 Infinitum Asset Management LLC155,529$1.22M0.6%N/A0.347% 2/17/2025 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC52,356$410K0.0%+17.4%0.117% 2/17/2025 Soleus Capital Management L.P.349,982$2.74M0.2%-12.5%0.781% 2/17/2025 Squarepoint Ops LLC102,968$806K0.0%-33.5%0.230% 2/17/2025 Two Sigma Advisers LP73,900$579K0.0%-13.1%0.165% 2/17/2025 Two Sigma Investments LP88,337$692K0.0%+31.6%0.197% 2/17/2025 Rafferty Asset Management LLC41,255$323K0.0%+17.6%0.092% 2/17/2025 ProShare Advisors LLC12,645$99K0.0%N/A0.028% 2/17/2025 Paradigm Biocapital Advisors LP4,236,346$33.17M1.2%+3.7%9.458% 2/17/2025 Millennium Management LLC35,447$278K0.0%-50.5%0.079% 2/17/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.22,818$179K0.0%+12.6%0.051% 2/17/2025 Deutsche Bank AG32,253$253K0.0%+52.2%0.072% 2/17/2025 D. E. Shaw & Co. Inc.615,131$4.82M0.0%-21.9%1.373% 2/17/2025 Cubist Systematic Strategies LLC48,011$376K0.0%N/A0.107% 2/17/2025 Bridgeway Capital Management LLC49,900$391K0.0%-34.3%0.111% 2/17/2025 Bank of America Corp DE127,159$996K0.0%+59.5%0.284% 2/17/2025 BNP Paribas Financial Markets4,874$38K0.0%-81.6%0.011% 2/17/2025 Acorn Capital Advisors LLC2,861,825$22.41M12.3%N/A6.389% 2/14/2025 Caligan Partners LP1,767,982$13.84M3.7%+47.9%3.947% 2/14/2025 Jane Street Group LLC33,203$260K0.0%-14.7%0.074% 2/14/2025 Northern Trust Corp359,223$2.81M0.0%+6.5%0.802% 2/14/2025 Boothbay Fund Management LLC693,693$5.43M0.1%+24.4%1.549% 2/14/2025 Virtus ETF Advisers LLC35,789$280K0.1%+30.9%0.080% 2/14/2025 Price T Rowe Associates Inc. MD14,067$111K0.0%-37.6%0.031% 2/14/2025 Dimensional Fund Advisors LP463,235$3.63M0.0%-3.0%1.034% 2/13/2025 Marshall Wace LLP49,225$385K0.0%+217.4%0.110% 2/13/2025 Jump Financial LLC33,380$261K0.0%N/A0.075% 2/13/2025 XTX Topco Ltd20,768$163K0.0%+83.8%0.046% 2/13/2025 Barclays PLC75,862$594K0.0%+9.6%0.169% 2/13/2025 Renaissance Technologies LLC131,600$1.03M0.0%+371.7%0.294% 2/13/2025 Legal & General Group Plc34,942$274K0.0%-7.3%0.078% 2/13/2025 Wells Fargo & Company MN17,458$137K0.0%+54.1%0.039% 2/12/2025 ExodusPoint Capital Management LP32,256$253K0.0%N/A0.072% 2/12/2025 Geode Capital Management LLC822,309$6.44M0.0%+1.1%1.836% 2/12/2025 Wellington Management Group LLP133,263$1.04M0.0%-2.5%0.298% 2/12/2025 Pictet Asset Management Holding SA756,297$5.92M0.0%+9.9%1.689% 2/12/2025 JPMorgan Chase & Co.97,660$765K0.0%+221.9%0.218% 2/11/2025 Prudential Financial Inc.18,625$146K0.0%-39.2%0.042% 2/11/2025 Vanguard Group Inc.2,000,022$15.66M0.0%-1.7%4.465% 2/11/2025 KLP Kapitalforvaltning AS5,900$46K0.0%N/A0.013% 2/7/2025 AlphaQuest LLC27,135$212K0.0%+6,911.6%0.061% 2/6/2025 Charles Schwab Investment Management Inc.284,540$2.23M0.0%+1.8%0.635% 1/31/2025 Principal Financial Group Inc.22,197$174K0.0%+9.4%0.050% This strange black card is showing up across America (Ad)"THIS is the Biggest Economic Story of 2025" While most Americans are focused on tariffs and inflation, the White House just greenlit a $30 trillion upgrade to our financial system. Big firms like JP Morgan and Goldman Sachs are already onboard. And our Wall Street insider expects this change to create more wealth in the next 5 years than major innovations like the computer.Get the full story, before the rest of Wall Street catches on, right here.1/17/2025 SG Americas Securities LLC17,729$139K0.0%+30.7%0.040% 12/26/2024 JPMorgan Chase & Co.30,335$399K0.0%+10.4%0.068% 12/19/2024 Principal Financial Group Inc.20,294$267K0.0%N/A0.045% 11/19/2024 Barclays PLC69,222$910K0.0%+433.4%0.155% 11/18/2024 Empire Financial Management Company LLC16,000$210K0.1%N/A0.036% 11/16/2024 Geode Capital Management LLC813,489$10.70M0.0%+6.2%1.816% 11/15/2024 Barclays PLC69,222$910K0.0%+433.4%0.155% 11/15/2024 XTX Topco Ltd11,300$149K0.0%-54.1%0.025% 11/15/2024 Wellington Management Group LLP136,714$1.80M0.0%-14.8%0.305% 11/15/2024 State Street Corp1,209,781$15.91M0.0%+50.4%2.701% (Data available from 1/1/2016 forward) YMAB Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of YMAB shares? During the previous two years, 93 institutional investors and hedge funds held shares of Y-mAbs Therapeutics. The most heavily invested institutionals were Paradigm Biocapital Advisors LP ($33.17M), State Street Corp ($15.91M), Vanguard Group Inc. ($15.66M), Acorn Capital Advisors LLC ($15.42M), Caligan Partners LP ($13.84M), Geode Capital Management LLC ($6.44M), and Pictet Asset Management Holding SA ($5.92M).Learn more on Y-mAbs Therapeutics' institutional investors. What percentage of Y-mAbs Therapeutics' stock is owned by institutional investors? 70.85% of Y-mAbs Therapeutics' stock is owned by institutional investors. Learn more on YMAB's institutional investor holdings. Which institutional investors have been buying Y-mAbs Therapeutics' stock? Of the 76 institutional investors that purchased Y-mAbs Therapeutics' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Acorn Capital Advisors LLC ($3.42M), Caligan Partners LP ($1.19M), State Street Corp ($405.17K), Nantahala Capital Management LLC ($351.88K), Stonepine Capital Management LLC ($285.30K), Acadian Asset Management LLC ($157.17K), and Infinitum Asset Management LLC ($155.53K). How much institutional buying is happening at Y-mAbs Therapeutics? Institutional investors have bought a total of 8,098,314 shares in the last 24 months. This purchase volume represents approximately $62.67M in transactions. Which of Y-mAbs Therapeutics' major shareholders have been selling company stock? Of the 30 institutional investors that sold Y-mAbs Therapeutics' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Point72 Asset Management L.P. ($263.56K), D. E. Shaw & Co. Inc. ($172.41K), JPMorgan Chase & Co. ($83.39K), Connor Clark & Lunn Investment Management Ltd. ($81.83K), Cubist Systematic Strategies LLC ($71.19K), Squarepoint Ops LLC ($51.96K), and Soleus Capital Management L.P. ($50K). How much institutional selling is happening at Y-mAbs Therapeutics? Institutional investors have sold a total of 1,117,497 shares in the last 24 months. This volume of shares sold represents approximately $10.52M in transactions. Related Companies SDGR Institutional Ownership AVDL Institutional Ownership ARDX Institutional Ownership JANX Institutional Ownership HROW Institutional Ownership VERA Institutional Ownership AMPH Institutional Ownership SNDX Institutional Ownership ETNB Institutional Ownership COGT Institutional Ownership This page (NASDAQ:YMAB) was last updated on 8/28/2025 by MarketBeat.com Staff From Our PartnersBuffett, Gates and Bezos Quietly Dumping Stocks—Here's WhyImagine a bull market so powerful, every single investor became a millionaire. 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