ABOS — ACUMEN PHARMACEUTICALS INC
As of Q2 2026, 25 SEC-registered investment managers reported holding ABOS (ACUMEN PHARMACEUTICALS INC) in their latest 13F filings, with a combined reported value of $23.51M across 8.85M shares. That is +30.2% by share count (+2.05M shares) versus the previous quarter, while reported value moved +46.6%. Ownership is concentrated: the five largest holders account for 82.2% of reported value and the top ten for 94.4%.
Compared with the prior quarter, 8 opened new positions, 8 added to existing stakes, 7 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
ABOS is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| BlackRock Inc history | Q2 2026 | 2.49M | $6.65M | 0.00% | Add |
| Franklin Resources history | Q2 2026 | 2.31M | $6.15M | 0.00% | Hold |
| Janus Henderson Group history | Q4 2021 | 627.26K | $4.24M | 0.00% | Reduce |
| Vanguard Group history | Q4 2025 | 1.65M | $3.49M | 0.00% | Hold |
| Geode Capital Management history | Q2 2026 | 1.14M | $3.05M | 0.00% | Add |
| Renaissance Technologies history | Q2 2026 | 675.02K | $1.80M | 0.00% | Add |
| Two Sigma Investments history | Q2 2026 | 622.88K | $1.66M | 0.00% | Add |
| Northern Trust Corp history | Q2 2026 | 360.74K | $963.19K | 0.00% | Add |
| Bank of America Corp history | Q2 2026 | 274.78K | $733.66K | 0.00% | Reduce |
| Goldman Sachs Group history | Q2 2026 | 183.93K | $491.08K | 0.00% | Reduce |
| Wellington Management Group history | Q1 2024 | 112.26K | $454.64K | 0.00% | New |
| Morgan Stanley history | Q2 2026 | 136.76K | $365.16K | 0.00% | Reduce |
| BNY Mellon history | Q2 2026 | 124.38K | $332.09K | 0.00% | New |
| Charles Schwab Investment Management history | Q2 2026 | 115.10K | $307.31K | 0.00% | New |
| Millennium Management history | Q2 2026 | 60.60K | $161.80K | 0.00% | Reduce |
| Point72 Asset Management history | Q1 2026 | 67.38K | $159.00K | 0.00% | Add |
| Moore Capital Management history | Q4 2022 | 27.58K | $148.92K | 0.00% | Reduce |
| Citadel Advisors history | Q2 2026 | 51.05K | $136.30K | 0.00% | Add |
| D. E. Shaw & Co history | Q2 2024 | 55.01K | $133.12K | 0.00% | New |
| Wells Fargo & Co history | Q2 2026 | 49.69K | $132.66K | 0.00% | Add |
New Positions (Q2 2026)
- BNY Mellon 124.38K sh · $332.09K
- Charles Schwab Investment Management 115.10K sh · $307.31K
- Deutsche Bank AG 46.13K sh · $123.17K
- Invesco Ltd 24.59K sh · $65.65K
- JPMorgan Chase & Co 20.16K sh · $55.85K
- Balyasny Asset Management 11.87K sh · $31.70K
- Legal & General Investment Management America 4.61K sh · $12.31K
- T. Rowe Price Associates 39.33K sh · $106
Fully Exited (vs previous quarter)
- Point72 Asset Management sold 67.38K sh · $159.00K
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 2.33M | 2.37M | 2.33M | 291.96K | 174.69K | 169.50K | 178.33K | 2.49M |
| Franklin Resources | 937.50K | 602.27K | — | — | — | — | — | — | 2.84M | 3.36M | 3.40M | 3.37M | 3.55M | 3.27M | 3.14M | 3.08M | 2.31M | 2.31M | 2.31M | 2.31M |
| Geode Capital Management | 107.81K | 171.88K | 342.65K | 108.85K | 157.65K | 166.82K | 166.82K | 166.82K | 264.60K | 264.60K | 285.14K | 812.13K | 864.53K | 870.55K | 861.90K | 396.63K | 398.78K | 410.21K | 416.24K | 1.14M |
| Renaissance Technologies | — | 21.61K | — | — | — | 32.30K | 37.45K | 44.80K | 87.40K | — | — | 338.10K | 306.10K | 257.21K | 256.70K | 246.59K | 584.29K | 423.10K | 473.95K | 675.02K |
| Two Sigma Investments | — | — | — | 15.31K | — | 87.88K | 54.08K | 26.64K | 132.35K | 244.42K | 177.90K | 310.80K | 309.51K | 301.27K | 232.29K | 200.78K | 199.45K | 143.22K | 530.81K | 622.88K |
| Northern Trust Corp | 87.40K | 94.98K | 216.17K | 21.55K | 25.74K | 34.38K | 32.16K | 32.09K | 56.19K | 56.68K | 56.77K | 70.09K | 308.85K | 307.62K | 289.84K | 65.16K | 64.95K | 75.21K | 75.21K | 360.74K |
| Bank of America Corp | 990 | 21.09K | 26.05K | 28.13K | 22.57K | 38.61K | 27.84K | 15.74K | 16.48K | 104.37K | 80.62K | 122.72K | 138.72K | 148.67K | 158.93K | 147.01K | 213.73K | 240.15K | 320.22K | 274.78K |
| Goldman Sachs Group | 63.63K | 323.26K | 334.19K | 27.89K | 22.62K | 16.99K | 42.30K | 13.57K | 57.30K | 114.73K | 317.90K | 51.05K | 145.86K | 219.14K | 196.21K | 334.68K | 147.15K | 117.85K | 206.68K | 183.93K |
| Morgan Stanley | 569 | 20.63K | 13.69K | 24.20K | 18.91K | 25.68K | 51.51K | 15.32K | 22.24K | 23.13K | 48.71K | 87.81K | 239.20K | 266.22K | 152.64K | 153.75K | 149.40K | 166.91K | 144.58K | 136.76K |
| BNY Mellon | 17.95K | 19.18K | 68.97K | — | — | — | — | — | — | — | — | 126.42K | 92.98K | 92.98K | 90.26K | — | — | — | — | 124.38K |
| Charles Schwab Investment Management | 24.04K | 24.04K | 63.25K | — | — | — | — | — | — | — | — | 108.74K | 108.74K | 126.75K | 116.90K | — | — | — | — | 115.10K |
| Millennium Management | — | 37.16K | — | 587.58K | 535.49K | 665.72K | 645.88K | 1.34M | 1.77M | 1.50M | 2.63M | 1.95M | 1.83M | 1.34M | 1.14M | 1.95M | 601.72K | 584.14K | 659.67K | 60.60K |
| Citadel Advisors | 39.35K | 74.52K | 173.25K | 53.75K | 146.60K | 54.00K | 22.48K | 71.99K | 39.83K | 144.42K | 34.85K | 119.51K | 69.31K | 81.50K | 66.60K | 14.30K | 505.71K | 372.08K | 12.00K | 51.05K |
| Wells Fargo & Co | 51 | 2.08K | 2.77K | 570 | 2.09K | 1.79K | 3.10K | 2.10K | 194 | 2.21K | 1.21K | 20.43K | 21.26K | 26.12K | 27.68K | 6.83K | 6.50K | 7.10K | 10.11K | 49.69K |
| Marshall Wace | 156.25K | 156.25K | 32.83K | 18.81K | — | — | — | — | 25.49K | — | 89.71K | — | — | — | — | 137.94K | — | 20.91K | 192.89K | 48.11K |
| Deutsche Bank AG | 5.52K | 5.82K | 15.50K | — | — | — | — | — | — | — | — | 33.65K | 17.05K | 97.00K | 97.00K | — | — | — | — | 46.13K |
| UBS Group AG | 610 | 857 | 5.25K | — | 2.69K | — | 3.14K | — | 100 | 8 | 6.64K | 12.79K | 22.75K | 141.49K | 123.02K | 94.42K | 30.84K | 21.56K | 37.15K | 25.77K |
| Invesco Ltd | — | — | — | — | — | — | — | — | — | — | — | 18.99K | 18.19K | 19.84K | 127.80K | — | — | — | — | 24.59K |
| Citigroup Inc | 1.09K | 3.89K | 3.69K | 931 | 8.32K | 45.57K | 41.38K | 697 | 38.50K | 147.81K | 135.39K | 9.41K | 30.59K | 80.34K | 29.84K | 3.12K | 151 | — | 4.49K | 21.89K |
| JPMorgan Chase & Co | 3.67K | 7.24K | 18.05K | 1.62K | 2.43K | 1.13K | 1.24K | 1.27K | 11.03K | 33.95K | 71.89K | 17.88K | 63.07K | 937.91K | 832.27K | 16.68K | 3.03K | 2.41K | — | 20.16K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details