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Y-mAbs Therapeutics (YMAB) Institutional Ownership

Y-mAbs Therapeutics logo
$8.60 +0.01 (+0.12%)
Closing price 09/15/2025 04:22 PM Eastern
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$8.60 0.00 (0.00%)
As of 09/15/2025 04:22 PM Eastern
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Institutional Ownership Changes (13F Filings) for Y-mAbs Therapeutics (NASDAQ:YMAB)

Current
Institutional Ownership
Percentage
70.85%
Number of
Institutional Buyers
(last 12 months)
59
Total
Institutional Inflows
(last 12 months)
$62.67M
Number of
Institutional Sellers
(last 12 months)
30
Total
Institutional Outflows
(last 12 months)
$9.66M
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YMAB Institutional Buying and Selling by Quarter

Y-mAbs Therapeutics Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/15/2025 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%
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%
5/29/2025Rhumbline Advisers53,909$239K0.0%+4.8%0.119%
5/28/2025Strs Ohio43,400$192K0.0%N/A0.096%
5/19/2025Acorn Capital Advisors LLC3,235,387$14.33M9.3%+13.1%7.145%
5/16/2025Goldman Sachs Group Inc.201,776$894K0.0%-7.9%0.446%
5/16/2025Jacobs Levy Equity Management Inc.237,511$1.05M0.0%+58.7%0.525%
5/16/2025AQR Capital Management LLC164,788$730K0.0%+869.3%0.364%
5/15/2025Cubist Systematic Strategies LLC155,522$689K0.0%+223.9%0.343%
5/14/2025MetLife Investment Management LLC17,076$76K0.0%-22.9%0.038%
5/14/2025Stonepine Capital Management LLC131,160$581K0.6%N/A0.290%
5/14/2025Jump Financial LLC38,079$169K0.0%+14.1%0.084%
5/14/2025AlphaQuest LLC38,925$172K0.0%+43.4%0.086%
5/14/2025EntryPoint Capital LLC12,654$56K0.0%N/A0.028%
5/14/2025Wellington Management Group LLP204,052$904K0.0%+53.1%0.451%
5/13/2025Brooklyn Investment Group5,923$26K0.0%+4,563.8%0.013%
5/12/2025Nuveen LLC112,483$498K0.0%N/A0.248%
5/12/2025Invesco Ltd.32,547$144K0.0%+118.1%0.072%
5/12/2025Connor Clark & Lunn Investment Management Ltd.11,084$49K0.0%N/A0.024%
5/9/2025Deutsche Bank AG28,803$128K0.0%-10.7%0.064%
5/9/2025Charles Schwab Investment Management Inc.277,610$1.23M0.0%-2.4%0.613%
5/8/2025XTX Topco Ltd91,454$405K0.0%+340.4%0.202%
5/8/2025Federated Hermes Inc.153,453$680K0.0%+245.0%0.339%
5/7/2025Corton Capital Inc.12,432$55K0.2%N/A0.027%
5/1/2025Rice Hall James & Associates LLC103,642$459K0.0%-4.5%0.229%
4/30/2025Alps Advisors Inc.33,309$148K0.0%-8.0%0.074%
4/17/2025Exchange Traded Concepts LLC26,762$119K0.0%+107.9%0.059%
4/14/2025Wesbanco Bank Inc.55,000$244K0.0%N/A0.122%
4/8/2025Rhumbline Advisers53,909$239K0.0%+4.8%0.119%
3/24/2025Wellington Management Group LLP133,263$1.04M0.0%-2.5%0.295%
2/26/2025Infinitum Asset Management LLC155,529$1.22M0.6%N/A0.347%
2/17/2025UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC52,356$410K0.0%+17.4%0.117%
2/17/2025Soleus Capital Management L.P.349,982$2.74M0.2%-12.5%0.781%
2/17/2025Squarepoint Ops LLC102,968$806K0.0%-33.5%0.230%
2/17/2025Two Sigma Advisers LP73,900$579K0.0%-13.1%0.165%
2/17/2025Two Sigma Investments LP88,337$692K0.0%+31.6%0.197%
2/17/2025Rafferty Asset Management LLC41,255$323K0.0%+17.6%0.092%
2/17/2025ProShare Advisors LLC12,645$99K0.0%N/A0.028%
2/17/2025Paradigm Biocapital Advisors LP4,236,346$33.17M1.2%+3.7%9.458%
2/17/2025Millennium Management LLC35,447$278K0.0%-50.5%0.079%
2/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.22,818$179K0.0%+12.6%0.051%
2/17/2025Deutsche Bank AG32,253$253K0.0%+52.2%0.072%
2/17/2025D. E. Shaw & Co. Inc.615,131$4.82M0.0%-21.9%1.373%
2/17/2025Cubist Systematic Strategies LLC48,011$376K0.0%N/A0.107%
2/17/2025Bridgeway Capital Management LLC49,900$391K0.0%-34.3%0.111%
2/17/2025Bank of America Corp DE127,159$996K0.0%+59.5%0.284%
2/17/2025BNP Paribas Financial Markets4,874$38K0.0%-81.6%0.011%
2/17/2025Acorn Capital Advisors LLC2,861,825$22.41M12.3%N/A6.389%
2/14/2025Caligan Partners LP1,767,982$13.84M3.7%+47.9%3.947%
2/14/2025Jane Street Group LLC33,203$260K0.0%-14.7%0.074%
2/14/2025Northern Trust Corp359,223$2.81M0.0%+6.5%0.802%
2/14/2025Boothbay Fund Management LLC693,693$5.43M0.1%+24.4%1.549%
2/14/2025Virtus ETF Advisers LLC35,789$280K0.1%+30.9%0.080%
2/14/2025Price T Rowe Associates Inc. MD14,067$111K0.0%-37.6%0.031%
2/14/2025Dimensional Fund Advisors LP463,235$3.63M0.0%-3.0%1.034%
2/13/2025Marshall Wace LLP49,225$385K0.0%+217.4%0.110%
2/13/2025Jump Financial LLC33,380$261K0.0%N/A0.075%
2/13/2025XTX Topco Ltd20,768$163K0.0%+83.8%0.046%
2/13/2025Barclays PLC75,862$594K0.0%+9.6%0.169%
2/13/2025Renaissance Technologies LLC131,600$1.03M0.0%+371.7%0.294%
2/13/2025Legal & General Group Plc34,942$274K0.0%-7.3%0.078%
2/13/2025Wells Fargo & Company MN17,458$137K0.0%+54.1%0.039%
2/12/2025ExodusPoint Capital Management LP32,256$253K0.0%N/A0.072%
2/12/2025Geode Capital Management LLC822,309$6.44M0.0%+1.1%1.836%
2/12/2025Wellington Management Group LLP133,263$1.04M0.0%-2.5%0.298%
2/12/2025Pictet Asset Management Holding SA756,297$5.92M0.0%+9.9%1.689%
2/12/2025JPMorgan Chase & Co.97,660$765K0.0%+221.9%0.218%
2/11/2025Prudential Financial Inc.18,625$146K0.0%-39.2%0.042%
2/11/2025Vanguard Group Inc.2,000,022$15.66M0.0%-1.7%4.465%
2/11/2025KLP Kapitalforvaltning AS5,900$46K0.0%N/A0.013%
2/7/2025AlphaQuest LLC27,135$212K0.0%+6,911.6%0.061%
2/6/2025Charles Schwab Investment Management Inc.284,540$2.23M0.0%+1.8%0.635%
1/31/2025Principal Financial Group Inc.22,197$174K0.0%+9.4%0.050%
1/17/2025SG Americas Securities LLC17,729$139K0.0%+30.7%0.040%
12/26/2024JPMorgan Chase & Co.30,335$399K0.0%+10.4%0.068%
12/19/2024Principal Financial Group Inc.20,294$267K0.0%N/A0.045%
11/19/2024Barclays PLC69,222$910K0.0%+433.4%0.155%
11/18/2024Empire Financial Management Company LLC16,000$210K0.1%N/A0.036%
11/16/2024Geode Capital Management LLC813,489$10.70M0.0%+6.2%1.816%
11/15/2024Barclays PLC69,222$910K0.0%+433.4%0.155%
11/15/2024XTX Topco Ltd11,300$149K0.0%-54.1%0.025%
11/15/2024Wellington Management Group LLP136,714$1.80M0.0%-14.8%0.305%
11/15/2024State 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 29 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), Squarepoint Ops LLC ($51.96K), Soleus Capital Management L.P. ($50K), and Millennium Management LLC ($36.14K).

How much institutional selling is happening at Y-mAbs Therapeutics?

Institutional investors have sold a total of 1,046,308 shares in the last 24 months. This volume of shares sold represents approximately $9.66M in transactions.


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This page (NASDAQ:YMAB) was last updated on 9/16/2025 by MarketBeat.com Staff
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