Public ownership evidence

Acumen Pharmaceuticals, Inc. Common Stock (ABOS) Ownership Disclosures

Read ABOS insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Recent Form 4 activity

No matching purchases, sales or awards were returned in this 90-day public filing window.

No records are available for this view.

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

SEI INVESTMENTS CO2026-06-302026-08-1511,564$30,876None
ADAR1 Capital Management, LLC2026-06-302026-08-152,111,334$5,637,262None
Rangeley Capital, LLC2026-06-302026-08-1535,000$93,450None
XTX Topco Ltd2026-06-302026-08-1532,134$85,798None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15115,099$307,314None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15115,099$307,314None
Qube Research & Technologies Ltd2026-06-302026-08-1538,614$103,099None
OSAIC HOLDINGS, INC.2026-06-302026-08-157,350$19,624None
Squarepoint Ops LLC2026-06-302026-08-1552,351$139,777None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-15273,012$728,942None
Legal & General Group Plc2026-06-302026-08-154,610$12,309None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1559,400$158,598Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15126,104$336,698None
Ikarian Capital, LLC2026-06-302026-08-151,053,797$2,813,638None
Verdad Advisers, LP2026-06-302026-08-1544,478$118,756None
Hudson Bay Capital Management LP2026-06-302026-08-15955,000$2,549,850None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-1560,598$161,797None
Balyasny Asset Management L.P.2026-06-302026-08-1511,872$31,698None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-152,000$4,720None
Alyeska Investment Group, L.P.2026-06-302026-08-152,454,754$6,554,193None
ROYAL BANK OF CANADA2026-06-302026-08-151,561$4,000None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-15176,171$470,377None
RA CAPITAL MANAGEMENT, L.P.2026-06-302026-08-1520,992,669$56,050,426None
CITADEL ADVISORS LLC2026-06-302026-08-1551,049$136,301None
GROUP ONE TRADING LLC2026-06-302026-08-15722$1,928None
Invesco Ltd.2026-06-302026-08-155,742$15,331None
Invesco Ltd.2026-06-302026-08-1518,846$50,319None
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.2026-06-302026-08-1521,761$58,102None
NOMURA HOLDINGS INC2026-06-302026-08-15189,712$506,531None
TWO SIGMA SECURITIES, LLC2026-06-302026-08-1511,892$31,752None
TWO SIGMA INVESTMENTS, LP2026-06-302026-08-15622,882$1,663,095None
GOLDMAN SACHS GROUP INC2026-06-302026-08-15108,119$288,678None
GOLDMAN SACHS GROUP INC2026-06-302026-08-1575,808$202,407None
BARCLAYS PLC2026-06-302026-08-152,434$6,499None
BARCLAYS PLC2026-06-302026-08-1537,221$99,379None
PRICE T ROWE ASSOCIATES INC /MD/2026-06-302026-08-1539,327$106,000None
WELLS FARGO & COMPANY/MN2026-06-302026-08-157,008$18,711None
WELLS FARGO & COMPANY/MN2026-06-302026-08-1539,578$105,673None
WELLS FARGO & COMPANY/MN2026-06-302026-08-153,100$8,277None
BANK OF AMERICA CORP /DE/2026-06-302026-08-1528,326$75,630None
BANK OF AMERICA CORP /DE/2026-06-302026-08-15165,090$440,790None
BANK OF AMERICA CORP /DE/2026-06-302026-08-1581,365$217,245None
VANGUARD PORTFOLIO MANAGEMENT LLC2026-06-302026-08-14320,795$856,523None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-141,672,072$4,464,432None
Pathstone Holdings, LLC2026-06-302026-08-14859,110$2,293,824None
Knollwood Investment Advisory, LLC2026-06-302026-08-141,628,510$4,348,122None
Sands Capital Alternatives, LLC2026-06-302026-08-143,720,105$9,932,680None
Vanguard Global Advisers, LLC2026-06-302026-08-146,684$17,846None
Quantinno Capital Management LP2026-06-302026-08-1426,769$71,473None
Rockefeller Capital Management L.P.2026-06-302026-08-143,000$8,010None

90-day public filing window, up to 50 source positions.

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.