Acumen Pharmaceuticals, Inc.
ABOS- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001576885
No open-market purchases or sales by Acumen Pharmaceuticals, Inc. insiders were filed in the last 90 days; 96 institutions reported holding it in 13F filings for Q2 2026, worth $127.8M in total; no superinvestor holds it.
13F holders, Q4 2021
Institutional positions in Acumen Pharmaceuticals, Inc. as of Dec 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 52
- +12 vs. Q3 2021
- Shares held
- 25.6M
- +1.69M (+7.1%) vs. Q3 2021
- Total value
- $172.9M
- −$182.1M (−51.3%) vs. Q3 2021
- New holders
- 13
- 23 more added
- Sold out
- 1
- 6 more reduced
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2021: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ABOS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 96 | $127.8M |
| Q1 2026 | 84 | $108.5M |
| Q4 2025 | 71 | $75.2M |
| Q3 2025 | 69 | $61.1M |
| Q2 2025 | 71 | $43.6M |
| Q1 2025 | 81 | $44.8M |
| Q4 2024 | 80 | $73.2M |
| Q3 2024 | 73 | $107.8M |
| Q2 2024 | 81 | $105.5M |
| Q1 2024 | 80 | $176.3M |
| Q4 2023 | 67 | $147.8M |
| Q3 2023 | 66 | $181.4M |
| Q2 2023 | 53 | $126.6M |
| Q1 2023 | 62 | $114.0M |
| Q4 2022 | 60 | $158.0M |
| Q3 2022 | 50 | $278.4M |
| Q2 2022 | 47 | $120.5M |
| Q1 2022 | 57 | $106.1M |
| Q4 2021 | 52 | $172.9M |
| Q3 2021 | 41 | $357.4M |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2021
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 9,770,773 | $66.0M | 1.16% | 00.0% | Unchanged |
| Sands Capital Ventures, LLC | 3,417,075 | $23.1M | 3.42% | 00.0% | Unchanged |
| BlackRock Inc. | 3,109,670 | $21.0M | 0.00% | +240,879+8.4% | Added |
| Deep Track Capital, LP | 1,933,040 | $13.1M | 0.97% | +1,933,040 | New |
| Rock Springs Capital Management LP | 1,571,918 | $10.6M | 0.25% | −7,273−0.5% | Reduced |
| Laurion Capital Management LP | 656,848 | $4.44M | 0.08% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 627,263 | $4.24M | 0.00% | −232,918−27.1% | Reduced |
| Franklin Resources Inc | 602,266 | $4.07M | 0.00% | −335,234−35.8% | Reduced |
| Vanguard Group Inc | 554,973 | $3.75M | 0.00% | −769,925−58.1% | Reduced |
| Guardian Point Capital, LP | 500,000 | $3.38M | 0.78% | 00.0% | Unchanged |
| Woodline Partners LP | 480,681 | $3.25M | 0.05% | +11,887+2.5% | Added |
| Moore Capital Management, LP | 358,482 | $2.42M | 0.06% | −11,101−3.0% | Reduced |
| Goldman Sachs Group Inc | 323,264 | $2.19M | 0.00% | +259,629+408.0% | Added |
| BVF Inc | 289,663 | $1.96M | 0.07% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 171,879 | $1.16M | 0.00% | +64,073+59.4% | Added |
| Marshall Wace, LLP | 156,250 | $1.06M | 0.00% | 00.0% | Unchanged |
| Pura Vida Investments, LLC | 126,060 | $852.0K | 0.09% | +51,060+68.1% | Added |
| State Street Corp | 111,363 | $753.0K | 0.00% | +11,588+11.6% | Added |
| Northern Trust Corp | 94,984 | $642.0K | 0.00% | +7,583+8.7% | Added |
| Schonfeld Strategic Advisors LLC | 86,543 | $585.0K | 0.01% | +86,543 | New |
| HRT Financial LP | 81,917 | $553.0K | 0.00% | +81,917 | New |
| Ergoteles LLC | 77,152 | $522.0K | 0.02% | +77,152 | New |
| Citadel Advisors LLC | 74,523 | $504.0K | 0.00% | +35,177+89.4% | Added |
| Rex Capital Advisors, LLC | 65,336 | $442.0K | 0.23% | +65,336 | New |
| Millennium Management LLC | 37,163 | $251.0K | 0.00% | +37,163 | New |
| STRS Ohio | 33,300 | $225.0K | 0.00% | +31,100+1,413.6% | Added |
| D. E. Shaw & Co., Inc. | 27,167 | $184.0K | 0.00% | +8,853+48.3% | Added |
| Charles Schwab Investment Management Inc | 24,037 | $163.0K | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 21,609 | $146.0K | 0.00% | +21,609 | New |
| Bank of America Corp | 21,095 | $143.0K | 0.00% | +20,105+2,030.8% | Added |
| Morgan Stanley | 20,633 | $139.0K | 0.00% | +20,064+3,526.2% | Added |
| Jump Financial, LLC | 20,097 | $136.0K | 0.01% | +20,097 | New |
| Bank of New York Mellon Corp | 19,180 | $129.0K | 0.00% | +1,235+6.9% | Added |
| Squarepoint Ops LLC | 18,818 | $127.0K | 0.00% | +18,818 | New |
| Chicago Partners Investment Group LLC | 17,960 | $92.0K | 0.01% | +3,156+21.3% | Added |
| FMR LLC | 13,300 | $90.0K | 0.00% | −93,800−87.6% | Reduced |
| Nuveen Asset Management, LLC | 12,922 | $81.0K | 0.00% | 00.0% | Unchanged |
| Cubist Systematic Strategies, LLC | 11,545 | $78.0K | 0.00% | +11,545 | New |
| JPMorgan Chase & Co | 7,240 | $49.0K | 0.00% | +3,568+97.2% | Added |
| Tower Research Capital LLC (TRC) | 6,523 | $44.0K | 0.00% | +5,828+838.6% | Added |
| Deutsche Bank AG | 5,824 | $39.0K | 0.00% | +306+5.5% | Added |
| California State Teachers Retirement System | 5,659 | $38.0K | 0.00% | +479+9.2% | Added |
| New York State Common Retirement Fund | 5,481 | $37.0K | 0.00% | +5,481 | New |
| American International Group, Inc. | 5,335 | $36.0K | 0.00% | +88+1.7% | Added |
| Citigroup Inc | 3,891 | $26.0K | 0.00% | +2,797+255.7% | Added |
| Royal Bank of Canada | 2,370 | $16.0K | 0.00% | +1,269+115.3% | Added |
| Wells Fargo & Company | 2,075 | $14.0K | 0.00% | +2,024+3,968.6% | Added |
| Legal & General Group Plc | 888 | $6.00K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 857 | $6.00K | 0.00% | +247+40.5% | Added |
| Ameritas Investment Partners, Inc. | 735 | $5.00K | 0.00% | 00.0% | Unchanged |
| Bedel Financial Consulting, Inc. | 240 | $2.00K | 0.00% | +240 | New |
| FinTrust Capital Advisors, LLC | 20 | $0 | 0.00% | +20 | New |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −78−100.0% | Sold out |
| Marshall Wace North America L.P. | – | – | – | – | Not filed |