ACUMEN PHARMACEUTICALS INC

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ABOS·00509G209·US·Common Stock·Healthcare - Biotechnology-Activist

ABOS (ACUMEN PHARMACEUTICALS INC) is held by 64 institutional investors as of Q2 2026. Largest holders: RA CAPITAL MANAGEMENT, L.P. ($56.1M), BlackRock, Inc. ($6.6M), Alyeska Investment Group, L.P. ($6.6M). Net institutional sentiment: Mixed.

64

Holders

(4 Elite)

$101.7M

Total Value

64% (61)

Consensus

39 buying - 22 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)25

Insider (Form 4)85

Activist (13D/13G)56

Congressional (STOCK Act)65

Holder Quality

52

★★★★★

Elite

74

★★★★

Strong

60

★★★

Solid

18

★★

Below

75

★

Weak

Held by 64 funds

4 elite

Who's Trading

Source dates: Price Oct 15, 2026 · Insiders Jun 17, 2026 · Activists Apr 7, 2026 · Congress none

InsiderPDPorter DerrellSell $30KJun 17, 2026

InsiderPDPorter DerrellExercise 13K shJun 17, 2026

InsiderPDPorter DerrellSell $30KJun 16, 2026

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Top Holders

Top Holders (64)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
RA CAPITAL MANAGEMENT, L.P.	Unchanged	21M	$56.1M	0.5%	-80.62%	0
BlackRock, Inc.	Increased	2.5M(+1296.4%)	$6.6M	0.0%	-37.10%	44
AIAlyeska Investment Group, L.P.	Unchanged	2.5M	$6.6M	0.0%	-44.73%	0
FRANKLIN TEMPLETON INC	Unchanged	2.3M	$6.2M	0.0%	-58.44%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	1.7M(+11.0%)	$4.5M	0.0%	-30.15%	30
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.1M(+174.3%)	$3M	0.0%	-48.18%	43
Hudson Bay Capital Management LP	Decreased	955,000(-1.4%)	$2.5M	0.0%	-49.67%	0
Pathstone Holdings, LLC	Unchanged	859,110	$2.3M	0.0%	-30.69%	0
RENAISSANCE TECHNOLOGIES LLC	Increased	675,025(+42.4%)	$1.8M	0.0%	-25.20%	35
TWO SIGMA INVESTMENTS, LP	Increased	622,882(+17.4%)	$1.7M	0.0%	-36.90%	30
STATE STREET CORP	Increased	600,528(+295.8%)	$1.6M	0.0%	-39.82%	28
NORTHERN TRUST CORP	Increased	360,744(+379.6%)	$963,187	0.0%	-40.30%	40
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	320,795	$856,523	0.0%	-37.45%	38
DIMENSIONAL FUND ADVISORS LP	Increased	291,559(+143.5%)	$778,969	0.0%	-36.89%	40
VFVANGUARD FIDUCIARY TRUST CO	Increased	291,240(+46.2%)	$777,611	0.0%	-32.06%	34
BANK OF AMERICA CORP /DE/	Decreased	274,781(-14.2%)	$733,665	0.0%	-34.79%	0
NOMURA HOLDINGS INC	New	189,712	$506,531	0.0%	-37.45%	33
GOLDMAN SACHS GROUP INC	Decreased	183,927(-11.0%)	$491,085	0.0%	-22.44%	0
MORGAN STANLEY	Decreased	136,763(-5.4%)	$365,157	0.0%	-28.83%	0
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Decreased	126,104(-79.0%)	$336,698	0.0%	-23.76%	0

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer