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Assembly Biosciences (ASMB) Institutional Ownership

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$20.34 -2.43 (-10.67%)
Closing price 04:00 PM Eastern
Extended Trading
$20.32 -0.02 (-0.10%)
As of 04:55 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 Assembly Biosciences (NASDAQ:ASMB)

Current
Institutional Ownership
Percentage
19.92%
Number of
Institutional Buyers
(last 12 months)
40
Total
Institutional Inflows
(last 12 months)
$167.73M
Number of
Institutional Sellers
(last 12 months)
11
Total
Institutional Outflows
(last 12 months)
$21.23M
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ASMB Institutional Buying and Selling by Quarter

Assembly Biosciences Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/9/2026Engineers Gate Manager LP17,766$488K0.0%+88.5%0.087%
9/9/2026Squarepoint Ops LLC34,214$940K0.0%+43.7%0.168%
8/22/2026Seven Fleet Capital Management LP433,147$11.90M2.0%+671.5%2.127%
8/6/2026Bank of New York Mellon Corp24,015$660K0.0%N/A0.151%
6/4/2026Seven Fleet Capital Management LP56,147$1.56M0.5%-23.9%0.353%
5/19/2026Bank of America Corp DE10,902$303K0.0%+113.3%0.069%
5/19/2026Stempoint Capital LP185,435$5.15M1.0%+18.3%1.167%
5/19/2026Janus Henderson Group PLC849,309$23.48M0.0%+1.4%5.345%
5/18/2026Eversept Partners LP40,889$1.14M0.1%-74.4%0.257%
5/15/2026OMERS ADMINISTRATION Corp8,100$225K0.0%-48.1%0.051%
5/14/2026Renaissance Technologies LLC15,651$434K0.0%+69.4%0.098%
5/14/2026Arrowstreet Capital Limited Partnership39,446$1.10M0.0%+4.3%0.248%
2/26/2026Seven Fleet Capital Management LP4,315$147K0.1%N/A0.027%
2/18/2026Virtus Investment Advisers LLC7,369$251K0.1%N/A0.047%
2/18/2026Susquehanna Portfolio Strategies LLC13,903$473K0.0%N/A0.088%
2/18/2026Superstring Capital Management LP65,273$2.22M1.2%N/A0.413%
2/18/2026Millennium Management LLC98,221$3.34M0.0%+354.6%0.621%
2/18/2026Janus Henderson Group PLC837,925$28.54M0.0%+11.3%5.297%
2/18/2026Engineers Gate Manager LP10,375$353K0.0%N/A0.066%
2/18/2026Eversept Partners LP159,676$5.43M0.3%N/A1.009%
2/18/2026Caption Management LLC106,591$3.63M0.0%-69.5%0.674%
2/18/2026683 Capital Management LLC27,863$948K0.0%N/A0.176%
2/17/2026ADAR1 Capital Management LLC19,747$672K0.0%+4.2%0.125%
2/17/2026Schonfeld Strategic Advisors LLC54,235$1.85M0.0%-55.5%0.343%
2/17/2026Paradigm Biocapital Advisors LP665,251$22.63M0.6%N/A4.206%
2/17/2026Trexquant Investment LP28,276$962K0.0%+125.7%0.179%
2/17/2026Monimus Capital Management LP38,301$1.30M0.9%-9.0%0.242%
2/17/2026Adage Capital Partners GP L.L.C.161,000$5.48M0.0%N/A1.018%
2/16/2026OMERS ADMINISTRATION Corp15,598$530K0.0%N/A0.099%
2/16/2026Barclays PLC24,741$841K0.0%+524.6%0.156%
2/13/2026Marshall Wace LLP129,075$4.39M0.0%+51.5%0.816%
2/13/2026Hudson Bay Capital Management LP15,050$512K0.0%N/A0.095%
2/13/2026Charles Schwab Investment Management Inc.6,704$228K0.0%N/A0.042%
2/13/2026State Street Corp52,989$1.80M0.0%+18.2%0.335%
2/12/2026Jane Street Group LLC53,702$1.83M0.0%+58.8%0.339%
2/12/2026Renaissance Technologies LLC9,240$314K0.0%-94.0%0.058%
2/12/2026Informed Momentum Co LLC29,523$1.00M0.1%+1.6%0.187%
2/12/2026Patient Square Capital LP127,000$4.32M0.9%-6.1%0.803%
2/11/2026Franklin Resources Inc.210,528$7.16M0.0%-11.6%1.331%
2/10/2026Goldman Sachs Group Inc.34,794$1.18M0.0%+97.1%0.220%
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2/9/2026Geode Capital Management LLC131,307$4.47M0.0%+0.9%0.830%
1/21/2026Palumbo Wealth Management LLC37,305$1.27M0.3%+7.2%0.236%
11/17/2025Qube Research & Technologies Ltd11,030$282K0.0%N/A0.144%
11/17/2025RA Capital Management L.P.1,020,410$26.12M0.3%N/A13.300%
11/17/2025Parkman Healthcare Partners LLC250,981$6.43M0.7%N/A3.271%
11/17/2025Millennium Management LLC21,608$553K0.0%N/A0.282%
11/17/2025Farallon Capital Management LLC1,227,590$31.43M0.1%N/A16.001%
11/17/2025Citadel Advisors LLC53,878$1.38M0.0%+50.8%0.702%
11/17/2025Commodore Capital LP1,000,000$25.60M1.2%N/A13.034%
11/17/2025Bank of America Corp DE3,371$86K0.0%+6,382.7%0.044%
11/14/2025Schonfeld Strategic Advisors LLC121,888$3.12M0.0%N/A1.589%
11/14/2025ADAR1 Capital Management LLC18,947$485K0.0%N/A0.247%
11/14/2025B Group Inc.175,706$4.50M3.4%-7.2%2.290%
11/10/2025Palumbo Wealth Management LLC34,798$891K0.2%+86.4%0.454%
11/10/2025Patient Square Capital LP135,182$3.46M0.9%N/A1.762%
11/7/2025GSA Capital Partners LLP12,420$318K0.0%-16.3%0.162%
11/7/2025Vanguard Group Inc.502,112$12.85M0.0%+97.8%6.545%
10/16/2025Ellsworth Advisors LLC29,950$852K0.2%N/A0.390%
8/15/2025Man Group plc13,227$240K0.0%-26.3%0.172%
8/14/2025B Group Inc.189,350$3.43M2.6%-5.3%2.469%
8/8/2025Geode Capital Management LLC51,015$925K0.0%+6.9%0.668%
7/15/2025Palumbo Wealth Management LLC18,667$338K0.1%+3.8%0.244%
5/21/2025Acadian Asset Management LLC23,027$219K0.0%+42.1%0.301%
5/15/2025Armistice Capital LLC23,858$228K0.0%-85.8%0.312%
5/13/2025American Century Companies Inc.11,799$113K0.0%N/A0.154%
4/22/2025Palumbo Wealth Management LLC17,986$172K0.1%+57.4%0.240%
2/17/2025Man Group plc19,567$309K0.0%N/A0.308%
2/14/2025Northern Trust Corp28,649$452K0.0%-3.9%0.450%
2/14/2025B Group Inc.50,651$799K0.5%N/A0.796%
2/14/2025Gilead Sciences Inc.2,209,471$34.87M2.2%N/A34.740%
2/13/2025Marshall Wace LLP14,823$234K0.0%+16.5%0.233%
2/13/2025Renaissance Technologies LLC94,711$1.50M0.0%+44.3%1.489%
2/12/2025JPMorgan Chase & Co.11,427$180K0.0%+225.6%0.180%
2/10/2025Monimus Capital Management LP42,067$664K0.6%N/A0.661%
1/30/2025Palumbo Wealth Management LLC11,427$180K0.1%N/A0.180%
1/29/2025Peapod Lane Capital LLC62,970$994K1.0%N/A0.990%
12/26/2024JPMorgan Chase & Co.3,509$53K0.0%+5,137.3%0.055%
11/16/2024Geode Capital Management LLC47,034$712K0.0%-13.6%0.740%
11/13/2024FMR LLC15,855$240K0.0%+29.7%0.249%
8/15/2024Armistice Capital LLC468,000$6.42M0.1%N/A8.489%
8/9/2024Renaissance Technologies LLC54,911$753K0.0%+39.2%0.997%
8/6/2024Acadian Asset Management LLC13,558$184K0.0%+131.0%0.246%
5/10/2024Acadian Asset Management LLC5,868$78K0.0%-91.7%0.107%
5/10/2024Vanguard Group Inc.196,368$2.61M0.0%-91.6%3.581%
5/7/2024Marquette Asset Management LLC9,016$120K0.0%-83.4%0.165%
2/2/2024Marquette Asset Management LLC54,464$45K0.0%N/A0.083%
2/2/2024Acuitas Investments LLC265,585$218K0.1%N/A0.404%
1/31/2024Federated Hermes Inc.304,735$250K0.0%-10.9%0.463%
12/7/2023Hudson Bay Capital Management LP199,789$177K0.0%-75.8%0.304%
11/13/2023Acadian Asset Management LLC83,470$73K0.0%-26.7%0.127%
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8/7/2023Acadian Asset Management LLC113,854$130K0.0%-27.7%0.218%
5/12/2023Platinum Investment Management Ltd.890,736$749K0.0%-18.6%1.709%
5/8/2023Federated Hermes Inc.363,023$305K0.0%-2.8%0.699%
2/14/2023Susquehanna International Group LLP21,255$28K0.0%-37.7%0.044%
2/13/2023Platinum Investment Management Ltd.1,094,770$1.42M0.1%-24.5%2.244%
2/10/2023Connor Clark & Lunn Investment Management Ltd.65,393$85K0.0%-49.6%0.134%
11/15/2022Platinum Investment Management Ltd.1,450,328$2.38M0.1%-8.9%2.973%
11/14/2022Healthcare of Ontario Pension Plan Trust Fund570,300$935K0.0%N/A1.169%
11/10/2022Connor Clark & Lunn Investment Management Ltd.129,752$213K0.0%-9.2%0.268%
11/7/2022Virtu Financial LLC30,046$49K0.0%N/A0.062%


ASMB Institutional Ownership - Frequently Asked Questions

During the previous two years, 54 institutional investors and hedge funds held shares of Assembly Biosciences. The most heavily invested institutionals were Gilead Sciences Inc. ($34.87M), Farallon Capital Management LLC ($31.43M), RA Capital Management L.P. ($26.12M), Commodore Capital LP ($25.60M), Janus Henderson Group PLC ($23.48M), Paradigm Biocapital Advisors LP ($22.63M), and Vanguard Group Inc. ($12.85M).Learn more on Assembly Biosciences' institutional investors.

19.92% of Assembly Biosciences' stock is owned by institutional investors. Learn more on ASMB's institutional investor holdings.

Of the 49 institutional investors that purchased Assembly Biosciences' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Gilead Sciences Inc. ($2.21M), Farallon Capital Management LLC ($1.23M), RA Capital Management L.P. ($1.02M), Commodore Capital LP ($1M), Paradigm Biocapital Advisors LP ($665.25K), Seven Fleet Capital Management LP ($381.32K), and Parkman Healthcare Partners LLC ($250.98K).

Institutional investors have bought a total of 6,042,008 shares in the last 24 months. This purchase volume represents approximately $167.73M in transactions.

Of the 11 institutional investors that sold Assembly Biosciences' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Caption Management LLC ($243.21K), Renaissance Technologies LLC ($144.37K), Eversept Partners LP ($118.79K), Schonfeld Strategic Advisors LLC ($67.65K), Franklin Resources Inc. ($27.64K), Seven Fleet Capital Management LP ($17.62K), and B Group Inc. ($13.64K).

Institutional investors have sold a total of 654,786 shares in the last 24 months. This volume of shares sold represents approximately $21.23M in transactions.


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Institutional ownership data for NASDAQ:ASMB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/9/2026. New 13F filings are added each quarter as they're published.
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