Stock Ownership/ABOS

ACUMEN PHARMACEUTICALS INC (ABOS): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in ABOS · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
10
13F filers
Aggregate Value
$6.7M
Across holders
Last Price
$3.08
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity5 increased4 reduced3 exited
Full exits: Point72 Asset Management, L.P., Schonfeld Strategic Advisors LLC, Brevan Howard Capital Management LP
Institutional Holders of ABOS
↗
10 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Hudson Bay Capital Management LP
CIK 0001393825
Hedge Fund955K$2.5M37.9%0.0%Reduced+$2.4MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund675K$1.8M26.8%0.0%Added+$537KQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund623K$1.7M24.7%0.0%Added+$246KQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund61K$162K2.4%0.0%Reduced$-1.6MQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund52K$140K2.1%0.0%Added+$100KQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund51K$136K2.0%0.0%Added+$104KQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund48K$128K1.9%0.0%Reduced$-827KQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund39K$103K1.5%0.0%Reduced$-218KQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund12K$32K0.5%0.0%Added—Q2 2026
Rockefeller Capital Management L.P.
CIK 0001739439
Hedge Fund3K$8K0.1%0.0%Unchanged+$0Q2 2026
Hudson Bay Capital Management LPReduced
Hedge Fund
$2.5M· 37.9% of total· 0.0% port· 955K sh· +$2.4M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$1.8M· 26.8% of total· 0.0% port· 675K sh· +$537K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$1.7M· 24.7% of total· 0.0% port· 623K sh· +$246K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$162K· 2.4% of total· 0.0% port· 61K sh· $-1.6M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$140K· 2.1% of total· 0.0% port· 52K sh· +$100K QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$136K· 2.0% of total· 0.0% port· 51K sh· +$104K QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$128K· 1.9% of total· 0.0% port· 48K sh· $-827K QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$103K· 1.5% of total· 0.0% port· 39K sh· $-218K QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$32K· 0.5% of total· 0.0% port· 12K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Unchanged
Hedge Fund
$8K· 0.1% of total· 0.0% port· 3K sh· +$0 QoQ· Q2 2026
Loading recent insider activity…
← Stock ownership