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Acumen Pharmaceuticals (ABOS) Institutional Ownership

Acumen Pharmaceuticals logo
$1.25 +0.02 (+1.63%)
Closing price 09/17/2025 04:00 PM Eastern
Extended Trading
$1.25 0.00 (-0.40%)
As of 09/17/2025 04:34 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.
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Institutional Ownership Changes (13F Filings) for Acumen Pharmaceuticals (NASDAQ:ABOS)

Current
Institutional Ownership
Percentage
71.01%
Number of
Institutional Buyers
(last 12 months)
26
Total
Institutional Inflows
(last 12 months)
$4.85M
Number of
Institutional Sellers
(last 12 months)
10
Total
Institutional Outflows
(last 12 months)
$2.97M
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ABOS Institutional Buying and Selling by Quarter

Acumen Pharmaceuticals Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/19/2025 Marex Group plc33,300$39K0.0%N/A0.055%
8/18/2025 Hudson Bay Capital Management LP825,004$957K0.0%+7.1%1.362%
8/15/2025 Hudson Bay Capital Management LP825,004$957K0.0%+7.1%1.362%
8/15/2025 Bank of America Corp DE147,009$171K0.0%-7.5%0.243%
8/14/2025 Jane Street Group LLC175,670$204K0.0%+1,526.0%0.290%
8/14/2025 Qube Research & Technologies Ltd57,559$67K0.0%+160.0%0.095%
8/13/2025 Marshall Wace LLP137,943$160K0.0%N/A0.228%
8/12/2025 Franklin Resources Inc.3,077,039$3.57M0.0%-2.1%5.080%
8/8/2025 Geode Capital Management LLC396,626$460K0.0%-54.0%0.655%
8/1/2025 Y Intercept Hong Kong Ltd250,848$291K0.0%N/A0.414%
6/27/2025 Goldman Sachs Group Inc.196,207$216K0.0%-10.5%0.324%
5/16/2025Goldman Sachs Group Inc.196,207$216K0.0%-10.5%0.324%
5/16/2025AQR Capital Management LLC41,735$46K0.0%N/A0.069%
5/16/2025ADAR1 Capital Management LLC146,183$161K0.0%+55.0%0.241%
5/12/2025Nuveen LLC78,446$86K0.0%N/A0.130%
5/12/2025Invesco Ltd.127,798$141K0.0%+544.1%0.211%
2/17/2025Two Sigma Investments LP301,268$518K0.0%-2.7%0.501%
2/17/2025Two Sigma Advisers LP499,100$858K0.0%+6.4%0.831%
2/17/2025Millennium Management LLC1,344,745$2.31M0.0%-26.7%2.238%
2/17/2025Deutsche Bank AG96,995$167K0.0%+468.7%0.161%
2/17/2025Bank of America Corp DE148,668$256K0.0%+7.2%0.247%
2/14/2025Jane Street Group LLC30,740$53K0.0%-116.1%0.051%
2/14/2025Susquehanna Fundamental Investments LLC14,731$25K0.0%N/A0.025%
2/14/2025Rock Springs Capital Management LP1,838,916$3.16M0.1%-20.0%3.061%
2/14/2025Tower Research Capital LLC TRC20,624$35K0.0%+427.5%0.034%
2/14/2025Dimensional Fund Advisors LP98,016$169K0.0%+73.3%0.163%
2/13/2025Barclays PLC93,082$161K0.0%+50.1%0.155%
2/13/2025Renaissance Technologies LLC257,213$442K0.0%-16.0%0.428%
2/13/2025ADAR1 Capital Management LLC94,294$162K0.0%N/A0.157%
2/12/2025Franklin Resources Inc.3,273,633$5.63M0.0%-7.8%5.449%
2/12/2025JPMorgan Chase & Co.937,908$1.61M0.0%+1,387.2%1.561%
2/11/2025Clune & Associates LTD.16,500$28K0.0%N/A0.027%
2/11/2025Intech Investment Management LLC18,847$32K0.0%N/A0.031%
2/6/2025Charles Schwab Investment Management Inc.126,747$218K0.0%+16.6%0.211%
1/30/2025Rhumbline Advisers53,076$91K0.0%-40.0%0.088%
1/17/2025SG Americas Securities LLC25,631$44K0.0%+44.2%0.043%
12/26/2024JPMorgan Chase & Co.63,066$156K0.0%+252.8%0.105%
11/27/2024Franklin Resources Inc.3,549,069$8.34M0.0%+5.4%5.907%
11/19/2024Barclays PLC61,997$154K0.0%+189.1%0.103%
11/16/2024Geode Capital Management LLC864,528$2.14M0.0%+6.5%1.439%
11/15/2024Barclays PLC61,997$154K0.0%+189.1%0.103%
11/15/2024State Street Corp516,406$1.28M0.0%+18.3%0.860%
11/13/2024FMR LLC2,028,117$5.03M0.0%+0.3%3.376%
11/13/2024The Manufacturers Life Insurance Company52,333$130K0.0%-12.8%0.087%
10/3/2024SG Americas Securities LLC17,772$44K0.0%N/A0.030%
8/16/2024Murchinson Ltd.56,250$136K0.0%N/A0.094%
8/15/2024Millennium Management LLC1,954,085$4.73M0.0%-25.7%3.252%
8/14/2024Murchinson Ltd.56,250$136K0.0%N/A0.094%
8/12/2024Marathon Trading Investment Management LLC26,298$64K0.0%-56.2%0.044%
8/9/2024Renaissance Technologies LLC338,100$818K0.0%N/A0.563%
8/9/2024Dimensional Fund Advisors LP56,548$137K0.0%-8.4%0.094%
8/8/2024American Century Companies Inc.45,444$110K0.0%+31.3%0.076%
8/1/2024Rhumbline Advisers52,323$127K0.0%N/A0.087%
7/26/2024Bank of New York Mellon Corp126,422$306K0.0%N/A0.210%
7/19/2024Gladius Capital Management LP10,939$26K0.0%N/A0.018%
5/17/2024Ikarian Capital LLC266,435$1.08M0.1%-15.5%0.443%
5/15/2024Price T Rowe Associates Inc. MD1,098,276$4.45M0.0%N/A1.828%
5/10/2024Vanguard Group Inc.1,665,058$6.74M0.0%-9.5%2.771%
5/7/2024Susquehanna Fundamental Investments LLC62,518$253K0.0%N/A0.104%
5/7/2024SG Americas Securities LLC12,856$52K0.0%N/A0.021%
2/23/2024Chicago Partners Investment Group LLC18,315$70K0.0%+34.9%0.032%
2/15/2024Parkman Healthcare Partners LLC603,497$2.32M0.3%+20.7%1.042%
2/9/2024Franklin Resources Inc.3,358,809$12.90M0.0%+18.3%5.800%
2/7/2024Jump Financial LLC103,000$396K0.0%+203.8%0.178%
12/7/2023Hudson Bay Capital Management LP525,000$2.18M0.0%+32.9%0.907%
12/6/2023Citigroup Inc.38,498$160K0.0%+5,423.4%0.066%
11/15/2023RA Capital Management L.P.14,932,063$61.97M1.2%+52.8%25.803%
11/15/2023Rock Springs Capital Management LP2,812,579$11.67M0.3%N/A4.860%
11/15/2023Laurion Capital Management LP1,895,023$7.86M0.0%+57.1%3.275%
11/14/2023Schonfeld Strategic Advisors LLC645,112$2.68M0.0%N/A1.115%
11/14/2023Knollwood Investment Advisory LLC1,628,510$6.76M3.2%N/A2.814%
11/13/2023DekaBank Deutsche Girozentrale40,000$167K0.0%N/A0.069%
11/8/2023Pathstone Family Office LLC478,790$1.99M0.0%+2.5%0.827%
11/7/2023Jump Financial LLC33,900$141K0.0%N/A0.059%
11/3/2023Intrepid Financial Planning Group LLC30,150$125K0.1%+49.6%0.052%
10/26/2023Chicago Partners Investment Group LLC13,579$56K0.0%N/A0.023%
9/21/2023Baystate Wealth Management LLC18,020$87K0.0%N/A0.031%
8/14/2023Deep Track Capital LP3,916,361$18.84M0.9%-0.9%6.768%
8/14/2023Prelude Capital Management LLC31,100$150K0.0%N/A0.076%
8/2/2023Catalyst Financial Partners LLC89,699$431K0.2%N/A0.219%
8/2/2023Baystate Wealth Management LLC18,020$87K0.0%N/A0.044%
7/27/2023Pinnacle Associates Ltd.18,020$87K0.0%N/A0.044%
5/16/2023Great Point Partners LLC1,051,267$4.27M0.8%-5.8%2.563%
5/15/2023Commodore Capital LP400,000$1.62M0.2%-19.7%0.975%
5/15/2023Guardian Point Capital LP130,000$528K0.4%-56.7%0.317%
5/3/2023Jump Financial LLC10,183$41K0.0%-52.1%0.025%
5/2/2023Intrepid Financial Planning Group LLC30,150$122K0.1%+201.5%0.073%
4/26/2023Chicago Partners Investment Group LLC12,332$47K0.0%-34.0%0.030%
2/14/2023Moore Capital Management LP27,578$149K0.0%-93.5%0.068%
2/14/2023683 Capital Management LLC31,246$169K0.0%N/A0.077%
2/14/2023Driehaus Capital Management LLC563,864$3.05M0.0%-1.3%1.392%
2/13/2023Pathstone Family Office LLC530,330$2.86M0.0%+109.4%1.309%
2/10/2023Cheyne Capital Management UK LLP55,829$301K0.5%N/A0.138%
2/9/2023Chicago Partners Investment Group LLC18,679$109K0.0%+68.5%0.046%
2/7/2023WMS Partners LLC98,301$531K0.1%-45.4%0.243%
2/2/2023Intrepid Financial Planning Group LLC10,000$54K0.0%N/A0.025%
2/1/2023Bank of Montreal Can58,400$326K0.0%N/A0.144%
11/15/2022Pathstone Family Office LLC253,270$2.54M0.0%N/A0.625%
11/15/2022Perceptive Advisors LLC400,000$4.01M0.1%-21.3%0.988%
11/15/2022Endurant Capital Management LP55,328$555K0.2%N/A0.137%
(Data available from 1/1/2016 forward)

ABOS Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of ABOS shares?

During the previous two years, 53 institutional investors and hedge funds held shares of Acumen Pharmaceuticals. The most heavily invested institutionals were RA Capital Management L.P. ($61.97M), Laurion Capital Management LP ($7.86M), Knollwood Investment Advisory LLC ($6.76M), Vanguard Group Inc. ($6.74M), FMR LLC ($5.03M), Price T Rowe Associates Inc. MD ($4.45M), and Franklin Resources Inc. ($3.57M).Learn more on Acumen Pharmaceuticals' institutional investors.

What percentage of Acumen Pharmaceuticals' stock is owned by institutional investors?

71.01% of Acumen Pharmaceuticals' stock is owned by institutional investors. Learn more on ABOS's institutional investor holdings.

Which institutional investors have been buying Acumen Pharmaceuticals' stock?

Of the 46 institutional investors that purchased Acumen Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: RA Capital Management L.P. ($5.16M), Rock Springs Capital Management LP ($2.81M), Knollwood Investment Advisory LLC ($1.63M), Price T Rowe Associates Inc. MD ($1.10M), JPMorgan Chase & Co. ($920.03K), Franklin Resources Inc. ($701.50K), and Laurion Capital Management LP ($688.48K).

How much institutional buying is happening at Acumen Pharmaceuticals?

Institutional investors have bought a total of 2,951,543 shares in the last 24 months. This purchase volume represents approximately $4.85M in transactions.

Which of Acumen Pharmaceuticals' major shareholders have been selling company stock?

Of the 10 institutional investors that sold Acumen Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Millennium Management LLC ($490.01K), Geode Capital Management LLC ($465.27K), Rock Springs Capital Management LP ($461.14K), Franklin Resources Inc. ($340.34K), Renaissance Technologies LLC ($48.89K), Goldman Sachs Group Inc. ($45.87K), and Rhumbline Advisers ($35.41K).

How much institutional selling is happening at Acumen Pharmaceuticals?

Institutional investors have sold a total of 1,914,756 shares in the last 24 months. This volume of shares sold represents approximately $2.97M in transactions.


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This page (NASDAQ:ABOS) was last updated on 9/18/2025 by MarketBeat.com Staff
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