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