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, Q2 2026
Institutional positions in Acumen Pharmaceuticals, Inc. as of Jun 30, 2026. 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
- 96
- +13 vs. Q1 2026
- Shares held
- 47.9M
- +1.86M (+4.0%) vs. Q1 2026
- Total value
- $127.8M
- +$19.2M (+17.7%) vs. Q1 2026
- New holders
- 30
- 21 more added
- Sold out
- 17
- 15 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 20,992,669 | $56.1M | 0.49% | 00.0% | Unchanged |
| Sands Capital Ventures, LLC | 3,720,105 | $9.93M | 1.62% | 00.0% | Unchanged |
| BlackRock, Inc. | 2,490,115 | $6.65M | 0.00% | +2,311,789+1,296.4% | Added |
| Alyeska Investment Group, L.P. | 2,454,754 | $6.55M | 0.02% | 00.0% | Unchanged |
| Franklin Resources Inc | 2,305,096 | $6.15M | 0.00% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 2,111,334 | $5.64M | 0.26% | −45,000−2.1% | Reduced |
| Vanguard Capital Management LLC | 1,672,072 | $4.46M | 0.00% | +165,795+11.0% | Added |
| Knollwood Investment Advisory, LLC | 1,628,510 | $4.35M | 0.39% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,141,858 | $3.05M | 0.00% | +725,620+174.3% | Added |
| Ikarian Capital, LLC | 1,053,797 | $2.81M | 0.46% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 955,000 | $2.55M | 0.01% | −13,940−1.4% | Reduced |
| Pathstone Holdings, LLC | 859,110 | $2.29M | 0.01% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 675,025 | $1.80M | 0.00% | +201,079+42.4% | Added |
| Two Sigma Investments, LP | 622,882 | $1.66M | 0.00% | +92,070+17.3% | Added |
| State Street Corp | 600,528 | $1.60M | 0.00% | +448,800+295.8% | Added |
| Northern Trust Corp | 360,744 | $963.2K | 0.00% | +285,532+379.6% | Added |
| Vanguard Portfolio Management LLC | 320,795 | $856.5K | 0.00% | +320,795 | New |
| Dimensional Fund Advisors LP | 291,559 | $779.0K | 0.00% | +171,803+143.5% | Added |
| Vanguard Fiduciary Trust Co | 291,240 | $777.6K | 0.00% | +92,014+46.2% | Added |
| Bank of America Corp | 274,781 | $733.7K | 0.00% | −45,435−14.2% | Reduced |
| Boothbay Fund Management, LLC | 273,012 | $728.9K | 0.01% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 270,338 | $718.0K | 0.00% | +84,488+45.5% | Added |
| Nomura Holdings Inc | 189,712 | $506.5K | 0.00% | +189,712 | New |
| Goldman Sachs Group Inc | 183,927 | $491.1K | 0.00% | −22,756−11.0% | Reduced |
| Bridgeway Capital Management, LLC | 176,171 | $470.4K | 0.01% | 00.0% | Unchanged |
| Morgan Stanley | 136,763 | $365.2K | 0.00% | −7,821−5.4% | Reduced |
| Susquehanna International Group, LLP | 126,104 | $336.7K | 0.00% | −475,372−79.0% | Reduced |
| Bank of New York Mellon Corp | 124,377 | $332.1K | 0.00% | +124,377 | New |
| Charles Schwab Investment Management Inc | 115,099 | $307.3K | 0.00% | +115,099 | New |
| PFG Investments, LLC | 94,250 | $251.6K | 0.01% | +13,400+16.6% | Added |
| Catalyst Financial Partners LLC | 89,699 | $239.5K | 0.02% | 00.0% | Unchanged |
| Nuveen, LLC | 63,355 | $169.2K | 0.00% | +63,355 | New |
| Millennium Management LLC | 60,598 | $161.8K | 0.00% | −599,077−90.8% | Reduced |
| Squarepoint Ops LLC | 52,351 | $139.8K | 0.00% | +37,336+248.7% | Added |
| Citadel Advisors LLC | 51,049 | $136.3K | 0.00% | +51,049 | New |
| Prospera Financial Services Inc | 50,000 | $133.5K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 49,686 | $132.7K | 0.00% | +39,578+391.6% | Added |
| Marshall Wace, LLP | 48,114 | $128.5K | 0.00% | −144,775−75.1% | Reduced |
| Deutsche Bank AG | 46,132 | $123.2K | 0.00% | +46,132 | New |
| Verdad Advisers, LP | 44,478 | $118.8K | 0.11% | +7,200+19.3% | Added |
| Price T Rowe Associates Inc | 39,327 | $106.0K | 0.00% | +39,327 | New |
| Barclays PLC | 39,655 | $105.9K | 0.00% | +8,976+29.3% | Added |
| Qube Research & Technologies Ltd | 38,614 | $103.1K | 0.00% | −81,774−67.9% | Reduced |
| New York State Common Retirement Fund | 36,200 | $96.7K | 0.00% | +36,200 | New |
| Rhumbline Advisers | 35,034 | $93.5K | 0.00% | +35,034 | New |
| Rangeley Capital, LLC | 35,000 | $93.5K | 0.09% | 00.0% | Unchanged |
| XTX Topco Ltd | 32,134 | $85.8K | 0.00% | +32,134 | New |
| Intrepid Financial Planning Group LLC | 30,150 | $80.5K | 0.03% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 29,540 | $78.9K | 0.00% | +29,540 | New |
| Quantinno Capital Management LP | 26,769 | $71.5K | 0.00% | +26,769 | New |
| UBS Group AG | 25,765 | $68.8K | 0.00% | −11,381−30.6% | Reduced |
| Invesco Ltd. | 24,588 | $65.7K | 0.00% | +24,588 | New |
| Axq Capital, LP | 24,426 | $65.2K | 0.01% | −4,061−14.3% | Reduced |
| American Century Companies Inc | 24,136 | $64.4K | 0.00% | +6,207+34.6% | Added |
| Citigroup Inc | 21,889 | $58.4K | 0.00% | +17,403+387.9% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 21,761 | $58.1K | 0.00% | +21,761 | New |
| JPMorgan Chase & Co | 20,161 | $55.8K | 0.00% | +18,717+1,296.2% | Added |
| Police & Firemen's Retirement System of New Jersey | 19,393 | $51.8K | 0.00% | +19,393 | New |
| Independent Advisor Alliance | 19,000 | $50.7K | 0.00% | 00.0% | Unchanged |
| Pinnacle Associates Ltd | 18,020 | $48.1K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Management Advisory Group, LLC | 18,020 | $48.1K | 0.00% | 00.0% | Unchanged |
| Clune & Associates, Ltd. | 16,500 | $44.1K | 0.01% | 00.0% | Unchanged |
| Spark Investment Management LLC | 14,700 | $39.2K | 0.08% | +14,700 | New |
| Stifel Financial Corp | 12,900 | $34.4K | 0.00% | +12,900 | New |
| Virtu Financial LLC | 11,940 | $32.0K | 0.00% | +11,940 | New |
| Two Sigma Securities, LLC | 11,892 | $31.8K | 0.00% | +11,892 | New |
| Balyasny Asset Management LLC | 11,872 | $31.7K | 0.00% | +11,872 | New |
| SEI Investments Co | 11,564 | $30.9K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 11,329 | $30.2K | 0.00% | +10,121+837.8% | Added |
| Mesirow Financial Investment Management, Inc. | 11,305 | $30.2K | 0.00% | 00.0% | Unchanged |
| Bronte Capital Management Pty Ltd. | 10,716 | $28.6K | 0.00% | +10,716 | New |
| Intech Investment Management LLC | 10,446 | $27.9K | 0.00% | +10,446 | New |
| Integrated Wealth Concepts LLC | 10,179 | $27.2K | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 10,000 | $26.7K | 0.00% | +10,000 | New |
| FMR LLC | 7,530 | $20.1K | 0.00% | −1,149,816−99.3% | Reduced |
| Advisor Group Holdings, Inc. | 7,350 | $19.6K | 0.00% | +1,999+37.4% | Added |
| Vanguard Global Advisers, LLC | 6,684 | $17.8K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 4,610 | $12.3K | 0.00% | +4,610 | New |
| Ameritas Investment Partners, Inc. | 4,289 | $11.5K | 0.00% | +4,289 | New |
| Russell Investments Group, Ltd. | 3,779 | $10.1K | 0.00% | +3,779 | New |
| The PNC Financial Services Group, Inc. | 3,080 | $8.22K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 3,000 | $8.01K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 2,899 | $7.74K | 0.00% | +2,781+2,356.8% | Added |
| TFC Financial Management | 2,500 | $6.67K | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 2,000 | $4.72K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,561 | $4.00K | 0.00% | −5,529−78.0% | Reduced |
| Nisa Investment Advisors, LLC | 1,229 | $3.28K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 1,000 | $2.67K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 952 | $2.54K | 0.00% | +952 | New |
| Group One Trading, L.P. | 722 | $1.93K | 0.00% | −753−51.1% | Reduced |
| EverSource Wealth Advisors, LLC | 407 | $1.09K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 500 | $1.00K | 0.00% | +500 | New |
| SBI Securities Co., Ltd. | 291 | $777 | 0.00% | −12−4.0% | Reduced |
| Farther Finance Advisors, LLC | 200 | $534 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 39 | $104 | 0.00% | +39 | New |
| SRS Capital Advisors, Inc. | 26 | $69 | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −719,257−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −525,444−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −89,661−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −67,375−100.0% | Sold out |