ABOS Acumen Pharmaceuticals, Inc.
Acumen Pharmaceuticals, Inc. (ABOS) Institutional Ownership
What the institutions did with ABOS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 1.2M | 58.3% |
| DIMENSIONAL FUND ADVISORS LP | 324.0K | 16.4% |
| Bank of New York Mellon Corp | 115.0K | 5.8% |
| CATALYST FINANCIAL PARTNERS LLC | 99.7K | 5.0% |
| SIMPLEX TRADING, LLC | 62.6K | 3.2% |
| Prospera Financial Services Inc | 52.5K | 2.7% |
| BARCLAYS PLC | 48.7K | 2.5% |
| DEUTSCHE BANK AG\ | 40.2K | 2.0% |
| PINNACLE ASSOCIATES LTD | 18.0K | 0.9% |
| Pinnacle Wealth Management Advisory Group, LLC | 18.0K | 0.9% |
| Factor Wealth Management LTD | 16.5K | 0.8% |
| Mesirow Financial Investment Management, Inc. | 11.3K | 0.6% |
| Russell Investments Group, Ltd. | 3.8K | 0.2% |
| PNC Financial Services Group, Inc. | 2.8K | 0.1% |
| TFC Financial Management, Inc. | 2.5K | 0.1% |
| CITIGROUP INC | 2.3K | 0.1% |
| NISA INVESTMENT ADVISORS, LLC | 1.2K | 0.1% |
| Parkside Financial Bank & Trust | 1.0K | 0.1% |
| US BANCORP \DE\ | 1.0K | 0.1% |
| Sterling Capital Management LLC | 932 | 0.0% |
| GAMMA Investing LLC | 877 | 0.0% |
| Avion Wealth | 500 | 0.0% |
| EverSource Wealth Advisors, LLC | 407 | 0.0% |
| SBI Securities Co., Ltd. | 270 | 0.0% |
| Farther Finance Advisors, LLC | 225 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| SIMPLEX TRADING, LLC | New | 0 | 62.6K | +62.6K |
| Squarepoint Ops LLC | Sold Out | 52.4K | 0 | -52.4K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 291.6K | 324.0K | +32.4K |
| Y-Intercept (Hong Kong) Ltd | Sold Out | 29.5K | 0 | -29.5K |
| CITIGROUP INC | Reduced | 21.9K | 2.3K | -19.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.1M | 1.2M | +13.1K |
| CATALYST FINANCIAL PARTNERS LLC | Increased | 89.7K | 99.7K | +10.0K |
| Bank of New York Mellon Corp | Reduced | 124.4K | 115.0K | -9.4K |
| BARCLAYS PLC | Increased | 39.7K | 48.7K | +9.0K |
| DEUTSCHE BANK AG\ | Reduced | 46.1K | 40.2K | -6.0K |
| Prospera Financial Services Inc | Increased | 50.0K | 52.5K | +2.5K |
| Parkside Financial Bank & Trust | New | 0 | 1.0K | +1.0K |
| GAMMA Investing LLC | New | 0 | 877 | +877 |
| PNC Financial Services Group, Inc. | Reduced | 3.1K | 2.8K | -330 |
| SJS Investment Consulting Inc. | New | 0 | 183 | +183 |
| Caitong International Asset Management Co., Ltd | Reduced | 39 | 2 | -37 |
| Farther Finance Advisors, LLC | Increased | 200 | 225 | +25 |
| SBI Securities Co., Ltd. | Reduced | 291 | 270 | -21 |
| Sterling Capital Management LLC | Reduced | 952 | 932 | -20 |
| Pinnacle Wealth Management Advisory Group, LLC | Increased | 18.0K | 18.0K | +1 |
| PINNACLE ASSOCIATES LTD | Increased | 18.0K | 18.0K | +1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.