13F

Stock

Acumen Pharmaceuticals, Inc.

ABOS · held by 71 managers

Reported value

$74.1M

Holders

71

+1 new · −2 exited

Holders’ est. mark

$447.2K

Price effect on 4 books still in the name

Largest holder

$31.5M

RA CAPITAL MANAGEMENT, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
RA CAPITAL MANAGEMENT, L.P.14.9M$31.5MHeld
Sands Capital Alternatives, LLC3.42M$7.21MHeld
FRANKLIN RESOURCES INC2.31M$4.86MHeld
Fidelity2.03M$4.28MHeld
Vanguard1.65M$3.49MHeld
Knollwood Investment Advisory, LLC1.63M$3.44MHeld
Alyeska Investment Group, L.P.939.6K$1.98MHeld
ADAR1 Capital Management, LLC891.2K$1.88MHeld
Laurion Capital Management LP867K$1.83MHeld
Pathstone Holdings, LLC859.1K$1.81MHeld
Hudson Bay Capital Management LP725K$1.53M$290KAdded$290K
MILLENNIUM MANAGEMENT LLC584.1K$1.23MHeld
Renaissance Technologies423.1K$892.7KHeld
TWO SIGMA ADVISERS, LP421.8K$890KHeld
GEODE CAPITAL MANAGEMENT, LLC410.2K$865.7KHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP373.2K$787.4KHeld
Citadel345.3K$728.5KHeld
Ikarian Capital, LLC254.3K$536.6KHeld
BANK OF AMERICA CORP /DE/240.2K$506.7K$85.5KAdded$141.2K
BRIDGEWAY CAPITAL MANAGEMENT, LLC170.2K$359.1KHeld
BlackRock, Inc.169.5K$357.7KHeld
MORGAN STANLEY166.9K$352.2K$59.8KAdded$96.7K
TWO SIGMA INVESTMENTS, LP143.2K$302.2KHeld
JANE STREET GROUP, LLC142.1K$299.9KHeld
GOLDMAN SACHS GROUP INC117.9K$248.7KHeld
State Street100.2K$211.4KHeld
CATALYST FINANCIAL PARTNERS LLC89.7K$189.3KHeld
NORTHERN TRUST CORP75.2K$158.7KHeld
Prospera Financial Services Inc50K$105.5KHeld
XTX Topco Ltd49.6K$104.6KHeld
DIMENSIONAL FUND ADVISORS LP49.1K$103.5KHeld
Quadrature Capital Ltd49K$103.5KHeld
Qube Research & Technologies Ltd48K$101.2KHeld
BOOTHBAY FUND MANAGEMENT, LLC39.6K$83.5KHeld
Point72 Asset Management, L.P.36.4K$76.7KHeld
Intrepid Financial Planning Group LLC30.1K$63.6KHeld
BARCLAYS PLC30K$63.3K$12KAdded$12K
Catalyst Funds Management Pty Ltd29.6K$62.5KHeld
OMERS ADMINISTRATION Corp22.5K$47.4KHeld
UBS Group AG21.6K$45.5KHeld
MARSHALL WACE, LLP20.9K$44.1KHeld
PFG Investments, LLC19K$40.1KHeld
Independent Advisor Alliance19K$40.1KHeld
PINNACLE ASSOCIATES LTD18K$38KHeld
Pinnacle Wealth Management Advisory Group, LLC18K$38KHeld
CLUNE & ASSOCIATES, LTD.16.5K$34.8KHeld
NINE MASTS CAPITAL Ltd10.6K$22.4KHeld
WELLS FARGO & COMPANY/MN7.1K$15KHeld
OSAIC HOLDINGS, INC.6.85K$14.5KHeld
GROUP ONE TRADING LLC4.75K$10KHeld
Tower Research Capital LLC (TRC)4.46K$9.4KHeld
Larson Financial Group LLC4.35K$9.17KHeld
PNC Financial Services Group, Inc.3.08K$6.5KHeld
Rockefeller Capital Management L.P.3K$6.33KHeld
TFC Financial Management, Inc.2.5K$5.28KHeld
ROYAL BANK OF CANADA2.28K$5KHeld
JPMORGAN CHASE & CO2.41K$4.22KHeld
NISA INVESTMENT ADVISORS, LLC1.23K$2.59KHeld
BNP PARIBAS FINANCIAL MARKETS1.22K$2.58KHeld
EverSource Wealth Advisors, LLC407$859Held
SG Americas Securities, LLC401K$846Held
FLAGSHIP HARBOR ADVISORS, LLC350$739New
SBI Securities Co., Ltd.323$682Held
Farther Finance Advisors, LLC200$422Held
NBT BANK N A /NY2$422Held
ACADIAN ASSET MANAGEMENT LLC152.8K$320Held
Clearstead Advisors, LLC60$127Held
Arax Advisory Partners26$55Held
Virtu Financial LLC10.9K$23Held
Optiver Holding B.V.5$11Held
CWM, LLC147$0Held

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.