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

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.