Who owns Acumen Pharmaceuticals, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of ABOS from SEC Form 13F filings across 76 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 76 institutions disclosed 17.7M shares of Acumen Pharmaceuticals, Inc. worth $46.4M — about 24.5% of shares outstanding; the largest disclosed holder is Sands Capital Alternatives, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
76
13F holders
$46.4M
value, 2026 filers
24.5%
of shares outstanding (17.7M sh)
27
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of ABOS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Sands Capital Alternatives, LLC | 3.7M | $9.9M | 1.6% | 5.1% | 0.0% |
| 2 | BlackRock, Inc. | 2.5M | $6.6M | 0.0% | 3.4% | +1296.4% |
| 3 | FRANKLIN RESOURCES INC | 2.3M | $6.2M | 0.0% | 3.2% | 0.0% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $4.5M | 0.0% | 2.3% | -44.5% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 1.1M | $3.0M | 0.0% | 1.6% | +174.3% |
| 6 | Hudson Bay Capital Management LP | 955,000 | $2.5M | 0.0% | 1.3% | -1.4% |
| 7 | Pathstone Holdings, LLC | 859,110 | $2.3M | 0.0% | 1.2% | 0.0% |
| 8 | TWO SIGMA INVESTMENTS, LP | 622,882 | $1.7M | 0.0% | 0.9% | +17.3% |
| 9 | NORTHERN TRUST CORP | 360,744 | $963,187 | 0.0% | 0.5% | +379.6% |
| 10 | VANGUARD PORTFOLIO MANAGEMENT LLCNEW | 320,795 | $856,523 | 0.0% | 0.4% | new |
| 11 | VANGUARD FIDUCIARY TRUST CO | 291,240 | $777,611 | 0.0% | 0.4% | +46.2% |
| 12 | BANK OF AMERICA CORP /DE/ | 274,781 | $733,665 | 0.0% | 0.4% | -14.2% |
| 13 | BOOTHBAY FUND MANAGEMENT, LLC | 273,012 | $728,942 | 0.0% | 0.4% | 0.0% |
| 14 | ACADIAN ASSET MANAGEMENT LLC | 270,338 | $718 | 0.0% | 0.4% | +45.5% |
| 15 | NOMURA HOLDINGS INCNEW | 189,712 | $506,531 | 0.0% | 0.3% | new |
| 16 | GOLDMAN SACHS GROUP INC | 183,927 | $491,085 | 0.0% | 0.3% | -11.0% |
| 17 | MORGAN STANLEY | 136,763 | $365,157 | 0.0% | 0.2% | -5.4% |
| 18 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 126,104 | $336,698 | 0.0% | 0.2% | -79.0% |
| 19 | Bank of New York Mellon CorpNEW | 124,377 | $332,086 | 0.0% | 0.2% | new |
| 20 | Sixth Street Partners Management Company, L.P.NEW | 115,099 | $307,314 | 0.1% | 0.2% | new |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INCNEW | 115,099 | $307,314 | 0.0% | 0.2% | new |
| 22 | PFG Investments, LLC | 94,250 | $251,648 | 0.0% | 0.1% | +16.6% |
| 23 | Nuveen, LLCNEW | 63,355 | $169,158 | 0.0% | 0.1% | new |
| 24 | MILLENNIUM MANAGEMENT LLC | 60,598 | $161,797 | 0.0% | 0.1% | -90.8% |
| 25 | Squarepoint Ops LLC | 52,351 | $139,777 | 0.0% | 0.1% | +248.7% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.