13F

Stock

Acumen Pharmaceuticals, Inc.

ABOS · held by 84 managers

Reported value

$106.4M

Holders

84

+18 new · −7 exited

Holders’ est. mark

$7.81M

Price effect on 63 books still in the name

Largest holder

$49.5M

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.21M$49.5M$3.73MAdded$18M
Sands Capital Alternatives, LLC3.72M$8.78M$854.3KAdded$1.57M
Alyeska Investment Group, L.P.2.45M$5.78M$228.6KAdded$3.79M
FRANKLIN RESOURCES INC2.31M$5.44M$576.3KAdded$576.3K
ADAR1 Capital Management, LLC2.16M$5.09M$222.8KAdded$3.21M
Knollwood Investment Advisory, LLC1.63M$3.84M$407.1KAdded$407.1K
VANGUARD CAPITAL MANAGEMENT LLC1.51M$3.55MHeld
Fidelity1.16M$2.73M$289.3KCut−$1.55M
Ikarian Capital, LLC1.05M$2.49M$63.6KAdded$1.95M
Hudson Bay Capital Management LP968.9K$2.29M$181.2KAdded$756.9K
Pathstone Holdings, LLC859.1K$2.03M$214.8KAdded$214.8K
MILLENNIUM MANAGEMENT LLC659.7K$1.56M$146KAdded$324.3K
SUSQUEHANNA INTERNATIONAL GROUP, LLP601.5K$1.42M$93.3KAdded$632K
TWO SIGMA INVESTMENTS, LP530.8K$1.25M$35.8KAdded$950.5K
Laurion Capital Management LP525.4K$1.24M$131.4KCut−$589.4K
Renaissance Technologies473.9K$1.12M$105.8KAdded$225.8K
GEODE CAPITAL MANAGEMENT, LLC416.2K$982.8K$102.8KAdded$117.1K
BANK OF AMERICA CORP /DE/320.2K$755.7K$60KAdded$249K
BOOTHBAY FUND MANAGEMENT, LLC273K$644.3K$9.9KAdded$560.8K
GOLDMAN SACHS GROUP INC206.7K$487.8K$29.5KAdded$239.1K
VANGUARD FIDUCIARY TRUST CO199.2K$470.2KHeld
MARSHALL WACE, LLP192.9K$455.2K$5.23KAdded$411.1K
BlackRock, Inc.178.3K$420.8K$42.4KAdded$63.2K
BRIDGEWAY CAPITAL MANAGEMENT, LLC176.2K$415.8K$42.5KAdded$56.7K
State Street151.7K$358.1K$25KAdded$146.7K
MORGAN STANLEY144.6K$341.2K$36.1KCut−$10.9K
Qube Research & Technologies Ltd120.4K$284.1K$12KAdded$182.9K
DIMENSIONAL FUND ADVISORS LP119.8K$281.8K$11.9KAdded$178.2K
CATALYST FINANCIAL PARTNERS LLC89.7K$211.7K$22.4KAdded$22.4K
JANE STREET GROUP, LLC89.7K$211.6K$22.4KCut−$88.3K
PFG Investments, LLC80.8K$190.8K$4.75KAdded$150.7K
NORTHERN TRUST CORP75.2K$177.5K$18.8KAdded$18.8K
Point72 Asset Management, L.P.67.4K$159K$9.09KAdded$82.3K
Prospera Financial Services Inc50K$118K$12.5KAdded$12.5K
Catalyst Funds Management Pty Ltd45.6K$107.6K$7.4KAdded$45.2K
Verdad Advisers, LP37.3K$88KNew
UBS Group AG37.1K$87.7K$5.39KAdded$42.2K
Rangeley Capital, LLC35K$82.6KNew
BARCLAYS PLC30.7K$72.4K$7.5KAdded$9.12K
Intrepid Financial Planning Group LLC30.1K$71.2K$7.54KAdded$7.54K
OMERS ADMINISTRATION Corp28.6K$67.5K$5.61KAdded$20.1K
AXQ CAPITAL, LP28.5K$67.2KNew
Independent Advisor Alliance19K$44.8K$4.75KAdded$4.75K
PINNACLE ASSOCIATES LTD18K$42.5K$4.5KAdded$4.5K
Pinnacle Wealth Management Advisory Group, LLC18K$42.5K$4.5KAdded$4.5K
AMERICAN CENTURY COMPANIES INC17.9K$42.3KNew
SIMPLEX TRADING, LLC17.4K$41.1KNew
CLUNE & ASSOCIATES, LTD.16.5K$38.9K$4.13KAdded$4.13K
CAPTRUST FINANCIAL ADVISORS15.8K$37.2KNew
Brevan Howard Capital Management LP15.4K$36.3KNew
Squarepoint Ops LLC15K$35.4KNew
JACOBS LEVY EQUITY MANAGEMENT, INC13K$30.7KNew
SEI INVESTMENTS CO11.6K$27.3KNew
Mesirow Financial Investment Management, Inc.11.3K$26.7KNew
Schonfeld Strategic Advisors LLC11.3K$26.7KNew
Integrated Wealth Concepts LLC10.2K$24KNew
WELLS FARGO & COMPANY/MN10.1K$23.9K$1.78KAdded$8.87K
ROYAL BANK OF CANADA7.09K$17K$472Added$12K
Vanguard Global Advisers, LLC6.68K$15.8KHeld
OSAIC HOLDINGS, INC.5.35K$12.6K$1.34KCut−$1.83K
CITIGROUP INC4.49K$10.6KNew
PNC Financial Services Group, Inc.3.08K$7.27K$770Added$770
Rockefeller Capital Management L.P.3K$7.08K$750Added$750
TFC Financial Management, Inc.2.5K$5.9K$625Added$625
JONES FINANCIAL COMPANIES LLLP2K$4.52KNew
GROUP ONE TRADING LLC1.48K$3.48K$369Cut−$6.55K
JPMORGAN CHASE & CO1.44K$3.16K$635Cut−$1.05K
NISA INVESTMENT ADVISORS, LLC1.23K$2.9K$307Added$307
BNP PARIBAS FINANCIAL MARKETS1.21K$2.85K$302Added$268
Advisory Services Network, LLC1.11K$2.62KNew
US BANCORP \DE\1K$2.36KNew
SG Americas Securities, LLC719.3K$1.7K$100Added$851
EverSource Wealth Advisors, LLC407$961$102Added$102
SBI Securities Co., Ltd.303$715$75Added$33
Farther Finance Advisors, LLC200$510$88Added$88
NBT BANK N A /NY200$472−$417Added$50
ACADIAN ASSET MANAGEMENT LLC185.8K$435$38Added$115
Tower Research Capital LLC (TRC)118$278$29Cut−$9.13K
CWM, LLC87$205$205Added$205
Clearstead Advisors, LLC60$142$15Added$15
Arax Advisory Partners26$61$6Added$6
Larson Financial Group LLC20$47$5Cut−$9.13K
HRT FINANCIAL LP13.2K$31New
Optiver Holding B.V.5$12$1Added$1

Who left

Positions as of Q1 2026. 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.