Skip to content
Disclosery

ABOS ACUMEN PHARMACEUTICALS INC

Follow

CMN (common), issuer CIK 1576885

93 managers (96 13F filers) reported a position in ABOS shares at 2026-06-30, 47,856,762 shares in all. 30 filers opened a position and 17 filers sold out during the quarter.

Managers
93
13F filers
96
New
30
Added
21
Reduced
15
Sold out
17
Shares held by filers
47,856,762

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
RA CAPITAL MANAGEMENT, L.P.in group RA CAPITAL MANAGEMENT, L.P.20,992,669$56.1M0.49%013F-HRTimelineGroup
Sands Capital Alternatives, LLC3,720,105$9.93M1.62%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.2,490,115$6.65M<0.01%+2,311,78913F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.2,454,754$6.55M0.02%013F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources2,305,096$6.15M<0.01%013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding2,290,791$6.12M+578,604Timeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC2,111,334$5.64M0.26%-45,00013F-HRTimelineGroup
Knollwood Investment Advisory, LLC1,628,510$4.35M0.39%013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,141,858$3.05M<0.01%+725,62013F-HRTimelineGroup
Ikarian Capital, LLC1,053,797$2.81M0.46%013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…955,000$2.55M0.01%-13,94013F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC859,110$2.29M0.01%013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC675,025$1.8M<0.01%+201,07913F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP622,882$1.66M<0.01%+92,07013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP600,528$1.6M<0.01%+448,80013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP360,744$963K<0.01%+285,53213F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP291,559$779K<0.01%+171,80313F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/274,781$734K<0.01%-45,43513F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC273,012$729K0.01%013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC270,338$718K<0.01%+84,48813F-HRTimelineGroup
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD189,712$507K<0.01%new13F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC183,927$491K<0.01%-22,75613F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC176,171$470K0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY136,763$365K<0.01%-7,82113F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…126,104$337K<0.01%-475,37213F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp124,377$332K<0.01%new13F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co115,099$307K<0.01%new13F-HRTimelineGroup
PFG Investments, LLC94,250$252K0.01%+13,40013F-HRTimeline
CATALYST FINANCIAL PARTNERS LLC89,699$239K0.02%013F-HRTimeline
Nuveen, LLCin group TIAA63,355$169K<0.01%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC60,598$162K<0.01%-599,07713F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC52,351$140K<0.01%+37,33613F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC51,049$136K<0.01%new13F-HRTimelineGroup
Prospera Financial Services Inc50,000$134K<0.01%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN49,686$133K<0.01%+39,57813F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP48,114$128K<0.01%-144,77513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\46,132$123K<0.01%new13F-HRTimelineGroup
Verdad Advisers, LP44,478$119K0.11%+7,20013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/39,327$106K<0.01%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC39,655$106K<0.01%+8,97613F-HRTimelineGroup
Qube Research & Technologies Ltd38,614$103K<0.01%-81,77413F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND36,200$96.7K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS35,034$93.5K<0.01%new13F-HRTimeline
Rangeley Capital, LLC35,000$93.5K0.09%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd32,134$85.8K<0.01%new13F-HRTimelineGroup
Intrepid Financial Planning Group LLC30,150$80.5K0.03%013F-HRTimeline
Y-Intercept (Hong Kong) Ltd29,540$78.9K<0.01%new13F-HRTimeline
Quantinno Capital Management LP26,769$71.5K<0.01%new13F-HRTimeline
UBS Group AGin group UBS Group AG25,765$68.8K<0.01%-11,38113F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.24,588$65.7K<0.01%new13F-HRTimelineGroup
AXQ CAPITAL, LP24,426$65.2K0.01%-4,06113F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC24,136$64.4K<0.01%+6,20713F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC21,889$58.4K<0.01%+17,40313F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…21,761$58.1K<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO20,161$55.8K<0.01%+18,71713F-HRTimelineGroup
Police & Firemen's Retirement System of…19,393$51.8K<0.01%new13F-HRTimeline
Independent Advisor Alliance19,000$50.7K<0.01%013F-HRTimeline
PINNACLE ASSOCIATES LTD18,020$48.1K<0.01%013F-HRTimeline
Pinnacle Wealth Management Advisory Gro…18,020$48.1K<0.01%013F-HRTimeline
Factor Wealth Management LTD16,500$44.1K0.01%013F-HRTimeline
Spark Investment Management LLC14,700$39.2K0.08%new13F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP12,900$34.4K<0.01%new13F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC11,940$32K<0.01%new13F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC11,892$31.8K<0.01%new13F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management11,872$31.7K<0.01%new13F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO11,564$30.9K<0.01%013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS11,329$30.2K<0.01%+10,12113F-HRTimelineGroup
Mesirow Financial Investment Management…11,305$30.2K<0.01%013F-HRTimeline
Bronte Capital Management Pty Ltd.10,716$28.6K<0.01%new13F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,446$27.9K<0.01%new13F-HRTimeline
Integrated Wealth Concepts LLC10,179$27.2K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…10,000$26.7K<0.01%new13F-HRTimeline
FMR LLCin group FMR LLC7,530$20.1K<0.01%-1,149,81613F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.7,350$19.6K<0.01%+1,99913F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc4,610$12.3K<0.01%new13F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…4,289$11.5K<0.01%new13F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…3,779$10.1K<0.01%new13F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…3,080$8.22K<0.01%013F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…3,000$8.01K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,899$7.74K<0.01%+2,78113F-HRTimelineGroup
TFC Financial Management, Inc.2,500$6.67K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,000$4.72K<0.01%013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,561$4K<0.01%-5,52913F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC1,229$3.28K<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\1,000$2.67K<0.01%013F-HRTimelineGroup
Sterling Capital Management LLC952$2.54K<0.01%new13F-HRTimeline
GROUP ONE TRADING LLC722$1.93K<0.01%-75313F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…407$1.09K<0.01%013F-HRTimelineGroup
Avion Wealth500$1K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.291$777<0.01%-1213F-HRTimeline
Farther Finance Advisors, LLC200$534<0.01%013F-HRTimeline
Caitong International Asset Management …39$104<0.01%new13F-HRTimeline
Arax Advisory Partners26$69<0.01%013F-HRTimeline