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 Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Fmr Llc, Millennium Management Llc, Susquehanna International Group, Llp, State Street Corp, and Vanguard Portfolio Management Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
State Street CorpBuy+448,800+295.8%600,528$1.60MQ2 2026Sep 22, 2026
Citadel Advisors LlcBuy+51,049—51,049$136.30KQ2 2026Sep 02, 2026
Millennium Management LlcSell-599,077-90.8%60,598$161.80KQ2 2026Aug 14, 2026
Susquehanna International Group, LlpSell-475,372-79.0%126,104$336.70KQ2 2026Aug 14, 2026
Nomura Holdings IncBuy+189,712—189,712$506.53KQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+115,099—115,099$307.31KQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+92,070+17.3%622,882$1.66MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdSell-81,774-67.9%38,614$103.10KQ2 2026Aug 14, 2026
Bank Of America CorpSell-45,435-14.2%274,781$733.66KQ2 2026Aug 14, 2026
Adar1 Capital Management, LlcSell-45,000-2.1%2,111,334$5.64MQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+39,578+391.6%49,686$132.66KQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+39,327—39,327$106.00KQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+37,336+248.7%52,351$139.78KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+32,134—32,134$85.80KQ2 2026Aug 14, 2026
Invesco Ltd.Buy+24,588—24,588$65.65KQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-22,756-11.0%183,927$491.08KQ2 2026Aug 14, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+21,761—21,761$58.10KQ2 2026Aug 14, 2026
Hudson Bay Capital Management LpSell-13,940-1.4%955,000$2.55MQ2 2026Aug 14, 2026
Two Sigma Securities, LlcBuy+11,892—11,892$31.75KQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Buy+11,872—11,872$31.70KQ2 2026Aug 14, 2026
Barclays PlcBuy+8,976+29.3%39,655$105.88KQ2 2026Aug 14, 2026
Verdad Advisers, LpBuy+7,200+19.3%44,478$118.76KQ2 2026Aug 14, 2026
Royal Bank Of CanadaSell-5,529-78.0%1,561$4.00KQ2 2026Aug 14, 2026
Legal & General Group PlcBuy+4,610—4,610$12.31KQ2 2026Aug 14, 2026
Osaic Holdings, Inc.Buy+1,999+37.4%7,350$19.62KQ2 2026Aug 14, 2026
Group One Trading LlcSell-753-51.1%722$1.93KQ2 2026Aug 14, 2026
Fmr LlcSell-1,149,816-99.3%7,530$20.11KQ2 2026Aug 13, 2026
Vanguard Portfolio Management LlcBuy+320,795—320,795$856.52KQ2 2026Aug 13, 2026
Northern Trust CorpBuy+285,532+379.6%360,744$963.19KQ2 2026Aug 13, 2026
Renaissance Technologies LLCBuy+201,079+42.4%675,025$1.80MQ2 2026Aug 13, 2026
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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.