Filings under ABOS by Arbios Systems Inc (CIK 0001138862) from Jul 7, 2005 to Mar 25, 2008 belong to a different issuer and are not shown.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 17, 2026 | Porter Derrell | Director | Option exercise(M) | 13K | $1.07 | $14K |
| Jun 17, 2026 | Porter Derrell | Director | Sell(S) | 13K | $2.33 | $30K |
| Jun 17, 2026 | Porter Derrell | Director | Option exercise(M) | 13K | — | $0 |
| Jun 16, 2026 | Porter Derrell | Director | Sell(S) | 13K | $2.33 | $30K |
| Jun 15, 2026 | Porter Derrell | Director | Option exercise(M) | 6K | $1.07 | $7K |
| Jun 15, 2026 | Porter Derrell | Director | Sell(S) | 6K | $2.35 | $15K |
| Jun 15, 2026 | Porter Derrell | Director | Option exercise(M) | 6K | — | $0 |
| Jun 9, 2026 | Fountain Nathan B | Director | Sell(S) | 6K | $2.23 | $14K |
| Jun 3, 2026 | Golumbeski George | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Golumbeski George | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Stoppel Laura | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Stoppel Laura | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Ra Capital Management, L.P. | Director, 10% Owner | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Ra Capital Management, L.P. | Director, 10% Owner | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Ives Jeffrey L. | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Ives Jeffrey L. | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Porter Derrell | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Porter Derrell | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Stalfort John A III | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Stalfort John A III | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Drapkin Kimberlee C | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Drapkin Kimberlee C | Director | Grant(A) | 53K | — | $0 |
| Jun 3, 2026 | Fountain Nathan B | Director | Grant(A) | 36K | — | $0 |
| Jun 3, 2026 | Fountain Nathan B | Director | Grant(A) | 53K | — | $0 |
| Mar 16, 2026 | Shah Rajeev M. | Director, 10% Owner | Grant(A) | 6.1M | $3.30 | $20.0M |
| Mar 6, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 2K | $1.85 | $4K |
| Mar 6, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 2K | $3.26 | $7K |
| Mar 6, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 2K | — | $0 |
| Feb 27, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 9K | $1.85 | $17K |
| Feb 27, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 9K | $3.01 | $28K |
| Feb 27, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 9K | — | $0 |
| Jan 28, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 3K | $1.85 | $5K |
| Jan 28, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 3K | $3.00 | $8K |
| Jan 28, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 3K | — | $0 |
| Jan 26, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 15K | $3.00 | $45K |
| Jan 26, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 15K | $1.85 | $28K |
| Jan 26, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Option exercise(M) | 15K | — | $0 |
| Jan 23, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 6K | $1.90 | $11K |
| Jan 22, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 462 | $1.84 | $850 |
| Jan 22, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 3K | $1.88 | $5K |
| Jan 22, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 2K | $1.86 | $3K |
| Jan 22, 2026 | Siemers Eric | Chief Medical Officer | Sell(S) | 895 | $1.82 | $2K |
| Jan 22, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 1K | $1.84 | $2K |
| Jan 21, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 2K | $1.81 | $4K |
| Jan 21, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 9K | $1.81 | $17K |
| Jan 21, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 2K | $1.81 | $4K |
| Jan 21, 2026 | Siemers Eric | Chief Medical Officer | Sell(S) | 2K | $1.80 | $4K |
| Jan 21, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 2K | $1.81 | $4K |
| Jan 20, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Grant(A) | 300K | — | $0 |
| Jan 20, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Grant(A) | 450K | — | $0 |
| Jan 16, 2026 | Doherty James J. | President and CDO | Grant(A) | 167K | — | $0 |
| Jan 16, 2026 | Doherty James J. | President and CDO | Grant(A) | 250K | — | $0 |
| Jan 16, 2026 | Schacterle Amy | Chief Regulatory Officer | Grant(A) | 85K | — | $0 |
| Jan 16, 2026 | Schacterle Amy | Chief Regulatory Officer | Grant(A) | 127K | — | $0 |
| Jan 16, 2026 | Barton Russell | Chief Operating Officer | Grant(A) | 85K | — | $0 |
| Jan 16, 2026 | Barton Russell | Chief Operating Officer | Grant(A) | 127K | — | $0 |
| Jan 16, 2026 | Siemers Eric | Chief Medical Officer | Grant(A) | 99K | — | $0 |
| Jan 16, 2026 | Siemers Eric | Chief Medical Officer | Grant(A) | 149K | — | $0 |
| Jan 16, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Grant(A) | 99K | — | $0 |
| Jan 16, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Grant(A) | 149K | — | $0 |
| Jan 16, 2026 | Zuga Matt | CFO & Chief Business Officer | Grant(A) | 99K | — | $0 |
| Jan 16, 2026 | Zuga Matt | CFO & Chief Business Officer | Grant(A) | 149K | — | $0 |
| Jan 12, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 5K | $1.73 | $9K |
| Jan 12, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 9K | $1.71 | $15K |
| Jan 9, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 13K | $1.76 | $23K |
| Jan 9, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 5K | $1.76 | $9K |
| Jan 8, 2026 | Doherty James J. | President and CDO | Sell(S) | 6K | $1.82 | $12K |
| Jan 8, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 8K | $1.82 | $15K |
| Jan 8, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 30K | $1.82 | $55K |
| Jan 8, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 7K | $1.82 | $12K |
| Jan 8, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 4K | $1.86 | $7K |
| Jan 8, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 7K | $1.82 | $13K |
| Jan 7, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 2K | $1.99 | $3K |
| Jan 7, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 10K | $1.99 | $20K |
| Jan 7, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 2K | $1.99 | $3K |
| Jan 7, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 38K | $1.99 | $75K |
| Jan 7, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 4K | $2.00 | $8K |
| Jan 7, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 2K | $1.99 | $3K |
| Jan 7, 2026 | Schacterle Amy | Chief Regulatory Officer | Sell(S) | 1K | $1.98 | $2K |
| Jan 7, 2026 | Doherty James J. | President and CDO | Sell(S) | 2K | $1.99 | $3K |
| Jan 6, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 4K | $1.97 | $7K |
| Jan 6, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 7K | $1.97 | $14K |
| Jan 6, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 4K | $1.97 | $7K |
| Jan 6, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 5K | $1.97 | $10K |
| Jan 6, 2026 | Siemers Eric | Chief Medical Officer | Sell(S) | 7K | $1.97 | $13K |
| Jan 6, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 5K | $1.97 | $10K |
| Jan 5, 2026 | Barton Russell | Chief Operating Officer | Sell(S) | 4K | $1.96 | $8K |
| Jan 5, 2026 | Meisner Derek M | Chief Legal Officer & Corp Sec | Sell(S) | 4K | $1.96 | $8K |
| Jan 5, 2026 | OConnell Daniel Joseph | Chief Executive Officer, Director | Sell(S) | 5K | $1.97 | $9K |
| Jan 5, 2026 | Siemers Eric | Chief Medical Officer | Sell(S) | 4K | $1.96 | $8K |
| Jan 5, 2026 | Zuga Matt | CFO & Chief Business Officer | Sell(S) | 4K | $1.96 | $8K |
| Nov 6, 2025 | Golumbeski George | Director | Grant(A) | 50K | — | $0 |
| Jun 4, 2025 | RA Capital Healthcare Fund LP | Director, 10% Owner | Grant(A) | 13K | — | $0 |
| Jun 4, 2025 | RA Capital Healthcare Fund LP | Director, 10% Owner | Grant(A) | 20K | — | $0 |
| Jun 4, 2025 | Porter Derrell | Director | Grant(A) | 13K | — | $0 |
| Jun 4, 2025 | Porter Derrell | Director | Grant(A) | 20K | — | $0 |
| Jun 4, 2025 | Ives Jeffrey L. | Director | Grant(A) | 13K | — | $0 |
| Jun 4, 2025 | Ives Jeffrey L. | Director | Grant(A) | 20K | — | $0 |
| Jun 4, 2025 | Fountain Nathan B | Director | Grant(A) | 13K | — | $0 |
| Jun 4, 2025 | Fountain Nathan B | Director | Grant(A) | 20K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Acumen Pharmaceuticals, Inc., SEC CIK 0001576885. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under ABOS and shows every filing by that issuer. Earlier filings under the same symbol by another issuer are left out.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for ABOS