Eric Siemers insider trades: Acumen Pharmaceuticals (ABOS) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Eric reports to the SEC
Open-market buys and sales
5 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jan 22, 2026 | ABOS | ↓ Sell10b5-1 | 3,226 | $1.81 | $6K | Direct | Jan 23, 2026 (1d) |
| Jan 6, 2026 | ABOS | ↓ Sell10b5-1 | 10,834 | $1.96 | $21K | Direct | Jan 7, 2026 (1d) |
| Jan 21, 2025 | ABOS | ↓ Sell10b5-1 | 3,219 | $1.59 | $5K | Direct | Jan 23, 2025 (2d) |
| Jan 3, 2025 | ABOS | ↓ Sell10b5-1 | 10,859 | $1.85 | $20K | Direct | Jan 7, 2025 (4d) |
| Jan 18, 2024 | ABOS | ↓ Sell10b5-1 | 3,124 | $3.71 | $12K | Direct | Jan 19, 2024 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ABOS insiders
Open-market trades in the last 12 months
About Eric Siemers's insider trades
Eric Siemers is Chief Medical Officer at Acumen Pharmaceuticals (ABOS). Since Jan 18, 2024, Eric has reported no open-market purchases and 5 sales worth $64K on SEC Form 4. In the last 12 months: 2 sales ($27K).
5 sales (100% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (5 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ABOS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.