CMPX: Compass Therapeutics, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
2 open-market buys totaling $21K and 0 sales totaling - in the last 180 days.
Insider buys
| Score | Ticker | Company | Insider | Role | Trade date | Value | Holding + | Cluster |
|---|---|---|---|---|---|---|---|---|
| 22 | CMPX | Compass Therapeutics, Inc. | Lerner Neil | Officer | 2026-10-01 | $18K | 5% | |
| 11 | CMPX | Compass Therapeutics, Inc. | Lerner Neil | Officer | 2026-09-24 | $3K | 1% |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-07 | New 13G stake | STATE STREET CORPORATION | 5.50% | SEC |
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