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Mereo BioPharma Group (MREO) Institutional Ownership

Mereo BioPharma Group logo
$0.38 +0.01 (+3.52%)
Closing price 10/2/2026 04:00 PM Eastern
Extended Trading
$0.38 0.00 (-0.21%)
As of 10/2/2026 07:56 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 Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Mereo BioPharma Group (NASDAQ:MREO)

Current
Institutional Ownership
Percentage
62.83%
Number of
Institutional Buyers
(last 12 months)
32
Total
Institutional Inflows
(last 12 months)
$36.12M
Number of
Institutional Sellers
(last 12 months)
12
Total
Institutional Outflows
(last 12 months)
$7.95M
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MREO Institutional Buying and Selling by Quarter

Mereo BioPharma Group Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/20/2026Newtyn Management LLC3,000,000$953K0.1%-57.6%1.879%
6/12/2026Defilade Capital Management L.P.7,558,756$2.49M0.4%N/A4.735%
5/19/2026Bank of America Corp DE8,195,287$2.70M0.0%+32,048.5%5.134%
5/18/2026EcoR1 Capital LLC13,368,855$4.41M0.2%+70.2%8.375%
5/14/2026Forefront Analytics LLC127,778$42K0.0%+302.2%0.080%
2/18/2026Virtus Investment Advisers LLC122,595$51K0.0%+199.5%0.077%
2/18/2026Sphera Funds Management LTD.255,400$106K0.0%N/A0.160%
2/18/2026Quadrature Capital Ltd266,731$111K0.0%N/A0.168%
2/18/2026Millennium Management LLC83,646$35K0.0%-70.1%0.053%
2/18/2026EcoR1 Capital LLC7,856,466$3.27M0.1%N/A4.937%
2/18/2026Balyasny Asset Management L.P.1,280,275$533K0.0%N/A0.805%
2/18/2026683 Capital Management LLC15,025,000$6.26M0.3%+208.2%9.442%
2/17/2026Logos Global Management LP1,850,000$771K0.0%+270.0%1.163%
2/17/2026Luminus Management LLC395,000$165K0.1%N/A0.248%
2/17/2026ADAR1 Capital Management LLC150,000$63K0.0%N/A0.094%
2/17/2026Schonfeld Strategic Advisors LLC6,090,381$2.54M0.0%+251.5%3.827%
2/17/2026Graham Capital Management L.P.116,286$48K0.0%N/A0.073%
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC1,763,666$735K0.0%-7.5%1.108%
2/12/2026Renaissance Technologies LLC194,371$81K0.0%-67.1%0.122%
2/12/2026EntryPoint Capital LLC400,700$167K0.1%N/A0.252%
2/10/2026Monaco Asset Management SAM1,585,214$661K0.1%+67.6%0.996%
2/5/2026Tejara Capital Ltd2,159,681$900K0.2%+13.3%1.357%
2/5/2026Baader Bank Aktiengesellschaft128,742$54K0.0%N/A0.081%
12/15/2025Hudson Bay Capital Management LP265,000$546K0.0%-41.1%0.167%
12/1/2025Cantor Fitzgerald L. P.110,000$227K0.0%-67.9%0.069%
11/21/2025Forefront Analytics LLC33,180$68K0.1%+73.4%0.021%
11/17/2025Nomura Holdings Inc.103,800$214K0.0%-17.0%0.065%
11/17/2025Clearline Capital LP3,834,163$7.90M0.4%+6.0%2.411%
11/17/2025Cantor Fitzgerald L. P.110,000$227K0.0%-67.9%0.069%
11/17/2025Aquatic Capital Management LLC53,712$111K0.0%+99.5%0.034%
11/17/2025Alkeon Capital Management LLC3,698,100$7.62M0.0%-21.3%2.326%
11/14/2025Schonfeld Strategic Advisors LLC1,732,724$3.57M0.0%+90.5%1.090%
11/14/2025Virtu Financial LLC15,970$33K0.0%N/A0.010%
11/14/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC1,906,775$3.93M0.0%N/A1.199%
11/14/2025Two Sigma Investments LP1,088,096$2.24M0.0%+65.1%0.684%
11/14/2025Squarepoint Ops LLC30,055$62K0.0%+45.4%0.019%
11/14/2025Mangrove Partners IM LLC7,790,580$16.05M1.3%-9.8%4.900%
11/13/2025UBS Group AG970,667$2M0.0%+159.9%0.610%
11/13/2025Blue Owl Capital Holdings LP1,250,000$2.58M0.8%N/A0.786%
11/13/2025Knott David M Jr300,337$619K0.2%-5.9%0.189%
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11/10/2025Monaco Asset Management SAM945,915$1.95M0.1%+139.5%0.595%
11/7/2025GSA Capital Partners LLP58,145$120K0.0%N/A0.037%
11/7/2025State of New Jersey Common Pension Fund D15,644$32K0.0%N/A0.010%
11/7/2025Aberdeen Group plc5,538,699$11.41M0.0%+82.9%3.483%
11/4/2025Tejara Capital Ltd1,906,844$3.93M2.0%-21.5%1.199%
11/4/2025Significant Wealth Partners LLC47,814$98K0.0%+114.8%0.030%
10/31/2025PFG Investments LLC17,150$35K0.0%-54.2%0.011%
10/23/2025Clear Harbor Asset Management LLC77,000$159K0.0%+83.3%0.048%
10/20/2025Forefront Wealth Partners LLC33,180$68K0.0%N/A0.021%
8/19/2025Marex Group plc10,000$27K0.0%N/A0.006%
8/18/2025Nomura Holdings Inc.125,000$339K0.0%N/A0.079%
8/15/2025Soleus Capital Management L.P.599,711$1.63M0.1%-12.7%0.377%
8/15/2025Frazier Life Sciences Management L.P.9,440,112$25.58M1.0%+20.7%5.937%
8/15/2025683 Capital Management LLC4,350,000$11.79M0.8%-6.1%2.736%
8/14/2025Paloma Partners Management Co296,659$804K0.1%N/A0.187%
8/13/2025Tema Etfs LLC102,583$278K0.1%-84.3%0.065%
8/13/2025Virtus Investment Advisers LLC33,825$92K0.0%-23.1%0.021%
8/13/2025Tejara Capital Ltd2,430,437$6.59M3.1%-3.6%1.529%
8/12/2025XTX Topco Ltd69,341$188K0.0%N/A0.044%
8/7/2025Monaco Asset Management SAM395,000$1.07M0.2%-5.2%0.248%
7/24/2025Aberdeen Group plc3,028,872$8.21M0.0%+38.4%1.905%
7/15/2025Significant Wealth Partners LLC22,261$60K0.0%+61.7%0.014%
7/14/2025Avanza Fonder AB38,235$104K0.0%+36.0%0.024%
7/14/2025Atle Fund Management AB764,901$2.07M0.9%+96.1%0.481%
6/27/2025Goldman Sachs Group Inc.2,125,920$4.78M0.0%+0.3%1.337%
5/19/2025UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC1,569,100$3.53M0.0%+62.6%0.987%
5/16/2025Woodline Partners LP947,986$2.13M0.0%+53.2%0.596%
5/16/2025Goldman Sachs Group Inc.2,125,920$4.78M0.0%+0.3%1.337%
5/16/2025683 Capital Management LLC4,635,000$10.43M0.7%+1.9%2.915%
5/16/2025Adage Capital Partners GP L.L.C.1,700,756$3.83M0.0%-80.5%1.070%
5/15/2025Frazier Life Sciences Management L.P.7,819,863$17.60M0.8%+53.4%4.918%
5/15/2025Tema Etfs LLC654,666$1.47M0.4%-26.5%0.412%
5/14/2025Forefront Analytics LLC47,630$107K0.1%+37.1%0.030%
5/13/2025Tejara Capital Ltd2,521,324$5.67M2.2%+8.8%1.586%
5/13/2025Aberdeen Group plc2,188,354$4.92M0.0%N/A1.376%
5/12/2025Knott David M Jr319,337$719K0.3%-3.5%0.201%
5/9/2025BIT Capital GmbH101,070$227K0.0%N/A0.064%
5/8/2025Monaco Asset Management SAM416,468$937K0.2%+9.2%0.262%
4/15/2025Avanza Fonder AB28,121$67K0.0%+43.5%0.018%
4/7/2025GAMMA Investing LLC18,855$42K0.0%+109.5%0.012%
2/25/2025Polar Asset Management Partners Inc.169,977$595K0.0%-14.3%0.110%
2/17/2025UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC964,900$3.38M0.0%N/A0.622%
2/17/2025Woodline Partners LP618,784$2.17M0.0%N/A0.399%
2/17/2025Soleus Capital Management L.P.786,953$2.75M0.2%-7.1%0.507%
2/17/2025Two Sigma Investments LP68,735$241K0.0%-48.8%0.044%
2/17/2025Tema Etfs LLC890,548$3.12M1.3%N/A0.574%
2/17/2025Polar Asset Management Partners Inc.169,977$595K0.0%-14.3%0.110%
2/17/2025Janus Henderson Group PLC17,122,563$59.84M0.0%+38.7%11.036%
2/17/2025Graham Capital Management L.P.22,189$78K0.0%+74.7%0.014%
2/17/2025Clearline Capital LP3,217,894$11.26M1.5%-0.8%2.074%
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2/17/2025Cantor Fitzgerald L. P.225,000$788K0.0%N/A0.145%
2/17/2025Ameriprise Financial Inc.94,456$331K0.0%+187.9%0.061%
2/17/2025683 Capital Management LLC4,550,000$15.93M1.0%-6.2%2.933%
2/17/2025Acuta Capital Partners LLC779,308$2.73M2.7%-38.2%0.502%
2/14/2025Schonfeld Strategic Advisors LLC493,900$1.73M0.0%N/A0.318%
2/14/2025Virtus ETF Advisers LLC19,060$67K0.0%N/A0.012%
2/14/2025Blue Owl Capital Holdings LP672,809$2.36M0.6%-20.6%0.434%
2/14/2025Adage Capital Partners GP L.L.C.8,715,013$30.50M0.1%-10.3%5.617%
2/14/2025Hsbc Holdings PLC13,577$47K0.0%-52.5%0.009%
2/14/2025Rock Springs Capital Management LP9,599,170$33.60M1.3%+0.7%6.187%


MREO Institutional Ownership - Frequently Asked Questions

During the previous two years, 73 institutional investors and hedge funds held shares of Mereo BioPharma Group. The most heavily invested institutionals were Janus Henderson Group PLC ($59.84M), Rock Springs Capital Management LP ($33.60M), Frazier Life Sciences Management L.P. ($25.58M), Mangrove Partners IM LLC ($16.05M), Aberdeen Group plc ($11.41M), Clearline Capital LP ($7.90M), and Alkeon Capital Management LLC ($7.62M).Learn more on Mereo BioPharma Group's institutional investors.

62.83% of Mereo BioPharma Group's stock is owned by institutional investors. Learn more on MREO's institutional investor holdings.

Of the 60 institutional investors that purchased Mereo BioPharma Group's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: EcoR1 Capital LLC ($13.37M), 683 Capital Management LLC ($10.24M), Janus Henderson Group PLC ($9.24M), Bank of America Corp DE ($8.17M), Defilade Capital Management L.P. ($7.56M), Schonfeld Strategic Advisors LLC ($5.67M), and Aberdeen Group plc ($5.54M).

Institutional investors have bought a total of 57,534,412 shares in the last 24 months. This purchase volume represents approximately $36.12M in transactions.

Of the 12 institutional investors that sold Mereo BioPharma Group's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Newtyn Management LLC ($4.08M), Alkeon Capital Management LLC ($1M), Mangrove Partners IM LLC ($845.91K), Tejara Capital Ltd ($523.59K), Cantor Fitzgerald L. P. ($465.91K), Renaissance Technologies LLC ($396.50K), and Millennium Management LLC ($196.16K).

Institutional investors have sold a total of 7,895,717 shares in the last 24 months. This volume of shares sold represents approximately $7.95M in transactions.


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Institutional ownership data for NASDAQ:MREO is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/20/2026. New 13F filings are added each quarter as they're published.
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