Insiders / Siemers Eric
Siemers Eric
CIK 1866239personinsider
Companies
1
First seen
Jan 7, 2026
Last activity
Jan 23, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Acumen Pharmaceuticals, Inc. · ABOS | 255,371 | — |
All securities held
2 positions · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Acumen Pharmaceuticals, Inc. | Common Stock | 255,371 |
| Acumen Pharmaceuticals, Inc. | Employee Stock Option (right to buy)Derivative | 148,700 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jan 6, 2026 | Sell | ABOS Acumen Pharmaceuticals, Inc. Common Stock | $13.4K | -7K -4.11% | 159,464 0.22% of shares | low |
| Jan 5, 2026 | Sell | ABOS Acumen Pharmaceuticals, Inc. Common Stock | $7.8K | -4K -2.35% | 166,298 0.23% of shares | low |
| Jan 21, 2026 | Sell | ABOS Acumen Pharmaceuticals, Inc. Common Stock | $4.2K | -2K -0.90% | 256,266 0.35% of shares | low |
| Jan 22, 2026 | Sell | ABOS Acumen Pharmaceuticals, Inc. Common Stock | $1.6K | -895 -0.35% | 255,371 0.35% of shares | low |
| Jan 16, 2026 | Grant | ABOS Acumen Pharmaceuticals, Inc. Common Stock | $0 | +99K +62.17% | 258,597 0.36% of shares | low |
| Jan 16, 2026 | Grant | ABOS Acumen Pharmaceuticals, Inc. Employee Stock Option (right to buy) | — | +149K | 148,700 0.21% of shares | low |