ACUMEN PHARMACEUTICALS INC (ABOS) Institutional Ownership Changes & 13F Activity

ACUMEN PHARMACEUTICALS INC (ABOS) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCBuy50,846473,946$1,118,513
Q4 2025Renaissance Technologies LLCSell-161,192423,100$892,741
Q3 2025Renaissance Technologies LLCBuy337,704584,292$999,139
Q2 2025Renaissance Technologies LLCSell-10,112246,588$286,042
Q1 2025Renaissance Technologies LLCSell-513256,700$282,370
Q4 2024Renaissance Technologies LLCSell-48,887257,213$442,406
Q3 2024Renaissance Technologies LLCSell-32,000306,100$759,128
Q2 2024Renaissance Technologies LLCBuy250,700338,100$818,202
Q3 2023Renaissance Technologies LLCBuy42,60087,400$363
Q2 2023Renaissance Technologies LLCBuy7,35544,800$215
Q1 2023Renaissance Technologies LLCBuy5,14537,445$152
Q4 2022Renaissance Technologies LLCBuy10,69132,300$174
Q4 2021Renaissance Technologies LLCBuy21,60921,609$146

Frequently asked questions about ABOS activity

  • Which institutional owners are buying ABOS?

    Institutional owners buying ABOS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ABOS activity?

    "Buy" means an investor increased their reported position in ABOS compared to the prior reporting period. This reflects growing exposure to ACUMEN PHARMACEUTICALS INC (ABOS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ABOS increasing?

    Institutional interest in ABOS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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