Companies / Acumen Pharmaceuticals, Inc. / Activity
Activity — Acumen Pharmaceuticals, Inc.
32 moves.
Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | RA Capital Management, L.P. 13F manager | Add | Common stock | $14.30M | +6.1M +40.59% | 20,992,669 29.03% of shares | medium |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $6.20M | +2.3M +1369.05% | 2,490,115 3.44% of shares | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common stock | $1.34M | +500K +499.46% | 600,528 0.83% of shares | low |
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Add | Common stock | $914.7K | +388K +270.62% | 530,812 0.73% of shares | low |
| Q1 2026 as of | Laurion Capital Management LP 13F manager | Trim | Common stock | $-806.2K | -342K -39.40% | 525,444 0.73% of shares | low |
| Q1 2026 as of | Hudson Bay Capital Management LP 13F manager | Add | Common stock | $575.7K | +244K +33.65% | 968,940 1.34% of shares | low |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common stock | $405.9K | +172K +822.60% | 192,889 0.27% of shares | low |
| Q1 2026 as of | Millennium Management LLC 13F manager | Add | Common stock | $178.3K | +76K +12.93% | 659,675 0.91% of shares | low |
| Q2 2026 as of | Deutsche Bank AG 13F manager | New | Common stock | $123.2K | +46K | 46,132 0.06% of shares | low |
| Q1 2026 as of | Renaissance Technologies LLC 13F manager | Add | Common stock | $120.0K | +51K +12.02% | 473,946 0.66% of shares | low |
| Q2 2026 as of | Quadrature Capital Ltd 13F manager | Exit | Common stock | $-103.5K | -49K -100.00% | 0 | low |
| Q3 2024 as of | Barclays PLC 13F manager | Add | Common stock | $100.6K | +41K +189.08% | 61,997 0.09% of shares | low |
| Q4 2023 as of | Barclays PLC 13F manager | Add | Common stock | $95.7K | +25K +111.13% | 47,347 0.07% of shares | low |
| Q2 2024 as of | Barclays PLC 13F manager | Trim | Common stock | $-62.6K | -26K -54.67% | 21,446 0.03% of shares | low |
| Q4 2025 as of | Bank of America Corp /De 13F manager | Add | Common stock | $55.8K | +26K +12.36% | 240,152 0.33% of shares | low |
| Q4 2024 as of | Barclays PLC 13F manager | Add | Common stock | $53.5K | +31K +50.14% | 93,082 0.13% of shares | low |
| Q2 2025 as of | Barclays PLC 13F manager | Trim | Common stock | $-49.0K | -42K -58.50% | 29,991 0.04% of shares | low |
| Q1 2023 as of | Barclays PLC 13F manager | Trim | Common stock | $-34.5K | -9K -24.69% | 25,952 0.04% of shares | low |
| Q1 2025 as of | Barclays PLC 13F manager | Trim | Common stock | $-22.9K | -21K -22.36% | 72,265 0.10% of shares | low |
| Q2 2026 as of | NINE MASTS CAPITAL Ltd 13F manager | Exit | Common stock | $-22.4K | -11K -100.00% | 0 | low |
| Q4 2025 as of | Savant Capital, LLC 13F manager | Exit | Common stock | $-18.9K | -11K -100.00% | 0 | low |
| Q1 2026 as of | OMERS Administration Corporation 13F manager | Add | Common stock | $14.5K | +6K +27.37% | 28,600 0.04% of shares | low |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | Add | Common stock | $14.2K | +6K +1.47% | 416,238 0.58% of shares | low |
| Q1 2026 as of | Bridgeway Capital Management, LLC 13F manager | Add | Common stock | $14.2K | +6K +3.53% | 176,171 0.24% of shares | low |
| Q2 2025 as of | Savant Capital, LLC 13F manager | New | Common stock | $12.8K | +11K | 11,045 0.02% of shares | low |
| Q3 2023 as of | Barclays PLC 13F manager | Trim | Common stock | $-12.3K | -3K -11.69% | 22,425 0.03% of shares | low |
| Q1 2026 as of | Royal Bank of Canada 13F manager | Add | Common stock | $11.5K | +5K +210.69% | 7,090 <0.01% of shares | low |
| Q2 2023 as of | Barclays PLC 13F manager | Trim | Common stock | $-2.7K | -558 -2.15% | 25,394 0.04% of shares | low |
| Q2 2026 as of | SG Americas Securities, LLC 13F manager | Exit | Common stock | $-1.7K | -719K -100.00% | 0 | low |
| Q1 2026 as of | SG Americas Securities, LLC 13F manager | Add | Common stock | $751 | +318K +79.34% | 719,257 0.99% of shares | low |
| Q1 2024 as of | Barclays PLC 13F manager | Trim | Common stock | $-150 | -37 -0.08% | 47,310 0.07% of shares | low |
| Q1 2026 as of | BNP Paribas Financial Markets 13F manager | Trim | Common stock | $-38 | -16 -1.31% | 1,208 <0.01% of shares | low |