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ACUMEN PHARMA (ABOS)
NASDAQ
$2.31+$0.02 (+0.87%)
Price as of Jun 03, 2026 7:51 PM EDT- $187.8MMarket Cap
- 127.88%1-Year Change
- BiotechnologyIndustry
ACUMEN PHARMA (ABOS)
$2.31+$0.02 (+0.87%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
RA CAPITAL MANAGEMENT, L.P. | 34.66% | 21.0M | +6.1M (+28.87%) | Mar 31, 2026 |
SANDS CAPITAL VENTURES, LLC | 6.14% | 3.7M | +303,030 (+8.15%) | Mar 31, 2026 |
ALYESKA INVESTMENT GROUP, L.P. | 4.05% | 2.5M | +1.5M (+61.72%) | Mar 31, 2026 |
BLACKROCK FUNDING, INC. /DE | 3.92% | 2.4M | +40,517 (+1.71%) | Dec 31, 2024 |
FRANKLIN RESOURCES INC | 3.81% | 2.3M | 0 (0.00%) | Mar 31, 2026 |
BLACKROCK INC. | 3.56% | 2.2M | +2.0M (+91.21%) | Jun 30, 2024 |
ADAR1 CAPITAL MANAGEMENT, LLC | 3.56% | 2.2M | +1.3M (+58.67%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 2.43% | 1.5M | +31,788 (+2.16%) | Mar 31, 2026 |
FIDELITY SELECT PORTFOLIOS | 1.88% | 1.1M | 0 (0.00%) | Feb 28, 2026 |
FRANKLIN STRATEGIC SERIES | 1.36% | 826,400 | 0 (0.00%) | Jan 31, 2026 |
FIDELITY ADVISOR SERIES VII | 1.16% | 700,000 | 0 (0.00%) | Jan 31, 2026 |
FIDELITY SALEM STREET TRUST | 0.69% | 419,456 | 0 (0.00%) | Mar 31, 2026 |
FIDELITY CONCORD STREET TRUST | 0.57% | 345,331 | +11,550 (+3.34%) | Feb 28, 2026 |
Fidelity Central Investment Portfolios LLC | 0.46% | 280,000 | 0 (0.00%) | Feb 28, 2026 |
Current Ownership Distribution
- Institutions649.9M (86.80%)
- Mutual Funds67.0M (8.95%)
- Insiders31.8M (4.25%)
- Other0 (0.00%)
Insider Transactions
- 4.25% (31.8M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 6Number of InsiderSelling (last 12 months)
- $14.6MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Mar 06, 2026 | $0.00 | 2,090 | $0.00 | 71,048 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Mar 06, 2026 | $3,866.50 | 2,090 | $1.85 | 176,089 |
Meisner Derek M Chief Legal Officer & Corp Sec | Sell | Mar 06, 2026 | $6,813.40 | 2,090 | $3.26 | 173,999 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Feb 27, 2026 | $0.00 | 9,406 | $0.00 | 73,138 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Feb 27, 2026 | $17,401.10 | 9,406 | $1.85 | 183,405 |
Meisner Derek M Chief Legal Officer & Corp Sec | Sell | Feb 27, 2026 | $28,311.12 | 9,406 | $3.01 | 173,999 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Jan 28, 2026 | $0.00 | 2,671 | $0.00 | 82,544 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Jan 28, 2026 | $4,941.35 | 2,671 | $1.85 | 176,670 |
Meisner Derek M Chief Legal Officer & Corp Sec | Sell | Jan 28, 2026 | $8,017.27 | 2,671 | $3.00 | 173,999 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Jan 26, 2026 | $27,907.25 | 15,085 | $1.85 | 189,084 |
Meisner Derek M Chief Legal Officer & Corp Sec | Sell | Jan 26, 2026 | $45,262.54 | 15,085 | $3.00 | 173,999 |
Meisner Derek M Chief Legal Officer & Corp Sec | Exempt | Jan 26, 2026 | $0.00 | 15,085 | $0.00 | 85,215 |
Zuga Matt CFO & Chief Business Officer | Sell | Jan 22, 2026 | $3,137.82 | 1,687 | $1.86 | 304,924 |
Barton Russell Chief Operating Officer | Sell | Jan 22, 2026 | $850.08 | 462 | $1.84 | 205,092 |
OConnell Daniel Joseph Chief Executive Officer | Sell | Jan 22, 2026 | $5,065.54 | 2,689 | $1.88 | 881,275 |
Siemers Eric Chief Medical Officer | Sell | Jan 22, 2026 | $1,628.90 | 895 | $1.82 | 255,371 |
Zuga Matt CFO & Chief Business Officer | Sell | Jan 21, 2026 | $4,469.21 | 2,473 | $1.81 | 306,611 |
Barton Russell Chief Operating Officer | Sell | Jan 21, 2026 | $4,180.89 | 2,315 | $1.81 | 205,554 |
OConnell Daniel Joseph Chief Executive Officer | Sell | Jan 21, 2026 | $16,927.48 | 9,346 | $1.81 | 883,964 |
Siemers Eric Chief Medical Officer | Sell | Jan 21, 2026 | $4,203.96 | 2,331 | $1.80 | 256,266 |
Doherty James J. President and CDO | Award | Jan 16, 2026 | $0.00 | 250,300 | $0.00 | 250,300 |
Zuga Matt CFO & Chief Business Officer | Award | Jan 16, 2026 | $0.00 | 148,700 | $0.00 | 148,700 |
Barton Russell Chief Operating Officer | Award | Jan 16, 2026 | $0.00 | 126,900 | $0.00 | 126,900 |
Siemers Eric Chief Medical Officer | Award | Jan 16, 2026 | $0.00 | 148,700 | $0.00 | 148,700 |
Meisner Derek M Chief Legal Officer & Corp Sec | Award | Jan 16, 2026 | $0.00 | 148,700 | $0.00 | 148,700 |
Zuga Matt CFO & Chief Business Officer | Award | Jan 16, 2026 | $0.00 | 99,133 | $0.00 | 309,084 |
Barton Russell Chief Operating Officer | Award | Jan 16, 2026 | $0.00 | 84,600 | $0.00 | 207,869 |
Siemers Eric Chief Medical Officer | Award | Jan 16, 2026 | $0.00 | 99,133 | $0.00 | 258,597 |
Doherty James J. President and CDO | Award | Jan 16, 2026 | $0.00 | 166,867 | $0.00 | 220,900 |
Meisner Derek M Chief Legal Officer & Corp Sec | Award | Jan 16, 2026 | $0.00 | 99,133 | $0.00 | 182,933 |