ABOS insider buying and SEC filings, explained
Acumen Pharmaceuticals, Inc. · CIK 1576885
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$44K
Planned sales (10b5-1)
$536K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Jun 16, 2026 | Sale | Derrell Porter (Director) sold 12,800 shares at about $2.33 ($30K). Holdings down 27% to 35,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 17, 2026 |
| Jun 9, 2026 | Sale | Nathan B Fountain (Director) sold 6,400 shares at about $2.23 ($14K). Holdings down 12% to 48,150 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 10, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 2,090 shares at $3.26 ($7K), marked as a 10b5-1 plan trade. Holdings down 1% to 173,999 shares. | SEC filing Filed Mar 10, 2026 |
| Feb 27, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 9,406 shares at about $3.01 ($28K), marked as a 10b5-1 plan trade. Holdings down 5% to 173,999 shares. | SEC filing Filed Mar 3, 2026 |
| Jan 26–28, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 17,756 shares between Jan 26 and Jan 28 at about $3.00 ($53K), marked as a 10b5-1 plan trade. Holdings down 9% to 173,999 shares. | SEC filing Filed Jan 28, 2026 |
| Jan 21–23, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 8,934 shares between Jan 21 and Jan 23 at about $1.87 ($17K), marked as a 10b5-1 plan trade. Holdings down 5% to 173,999 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 21–22, 2026 | Planned (10b5-1) | Eric Siemers (Chief Medical Officer) sold 3,226 shares between Jan 21 and Jan 22 at about $1.81 ($6K), marked as a 10b5-1 plan trade. Holdings down 1% to 255,371 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 21–22, 2026 | Planned (10b5-1) | Matt Zuga (CFO) sold 4,160 shares between Jan 21 and Jan 22 at about $1.83 ($8K), marked as a 10b5-1 plan trade. Holdings down 1% to 304,924 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 21–22, 2026 | Planned (10b5-1) | Daniel Joseph OConnell (CEO and Director) sold 12,035 shares between Jan 21 and Jan 22 at about $1.83 ($22K), marked as a 10b5-1 plan trade. Holdings down 1% to 881,275 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 21–22, 2026 | Planned (10b5-1) | Russell Barton (President / COO) sold 2,777 shares between Jan 21 and Jan 22 at about $1.81 ($5K), marked as a 10b5-1 plan trade. Holdings down 1% to 205,092 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 8, 2026 | Planned (10b5-1) | Matt Zuga (CFO) sold 6,888 shares at about $1.82 ($13K), marked as a 10b5-1 plan trade. Holdings down 3% to 209,951 shares. | SEC filing Filed Jan 12, 2026 |
| Jan 8, 2026 | Planned (10b5-1) | Russell Barton (President / COO) sold 3,530 shares at about $1.86 ($7K), marked as a 10b5-1 plan trade. Holdings down 3% to 123,269 shares. | SEC filing Filed Jan 12, 2026 |
| Jan 8–12, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 50,659 shares between Jan 8 and Jan 12 at about $1.80 ($91K), marked as a 10b5-1 plan trade. Holdings down 38% to 83,800 shares. | SEC filing Filed Jan 12, 2026 |
| Jan 8–12, 2026 | Planned (10b5-1) | Daniel Joseph OConnell (CEO and Director) sold 26,472 shares between Jan 8 and Jan 12 at about $1.77 ($47K), marked as a 10b5-1 plan trade. Holdings down 4% to 593,510 shares. | SEC filing Filed Jan 12, 2026 |
| Jan 7–8, 2026 | Planned (10b5-1) | James J. Doherty (President / COO) sold 8,167 shares between Jan 7 and Jan 8 at about $1.86 ($15K), marked as a 10b5-1 plan trade. Holdings down 13% to 54,033 shares. | SEC filing Filed Jan 9, 2026 |
| Jan 7, 2026 | Planned (10b5-1) | Amy Schacterle (Chief Regulatory Officer) sold 1,097 shares at about $1.98 ($2K), marked as a 10b5-1 plan trade. Holdings down 12% to 7,703 shares. | SEC filing Filed Jan 9, 2026 |
| Jan 5–7, 2026 | Planned (10b5-1) | Matt Zuga (CFO) sold 14,905 shares between Jan 5 and Jan 7 at about $1.98 ($29K), marked as a 10b5-1 plan trade. Holdings down 6% to 216,839 shares. | SEC filing Filed Jan 7, 2026 |
| Jan 5–6, 2026 | Planned (10b5-1) | Eric Siemers (Chief Medical Officer) sold 10,834 shares between Jan 5 and Jan 6 at about $1.97 ($21K), marked as a 10b5-1 plan trade. Holdings down 6% to 159,464 shares. | SEC filing Filed Jan 7, 2026 |
| Jan 5–7, 2026 | Planned (10b5-1) | Daniel Joseph OConnell (CEO and Director) sold 47,506 shares between Jan 5 and Jan 7 at about $1.99 ($94K), marked as a 10b5-1 plan trade. Holdings down 7% to 619,982 shares. | SEC filing Filed Jan 7, 2026 |
| Jan 5–7, 2026 | Planned (10b5-1) | Derek M Meisner (Chief Legal Officer & Corp Sec) sold 26,668 shares between Jan 5 and Jan 7 at about $1.98 ($53K), marked as a 10b5-1 plan trade. Holdings down 17% to 134,459 shares. | SEC filing Filed Jan 7, 2026 |
| Jan 5–7, 2026 | Planned (10b5-1) | Russell Barton (President / COO) sold 9,318 shares between Jan 5 and Jan 7 at about $1.97 ($18K), marked as a 10b5-1 plan trade. Holdings down 7% to 126,799 shares. | SEC filing Filed Jan 7, 2026 |
22 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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