CMPX insider trading — Compass Therapeutics, Inc.
Over the last 90 days, insiders at Compass Therapeutics, Inc. (CMPX) made 2 open-market purchases worth $21K and 0 open-market sales worth $0, making them net buyers by $21K. The largest purchase was by Lerner Neil (Chief Accounting Officer), who bought 20,000 shares for $18K on Oct 1, 2026.
Updated Oct 16, 2026.
Recent CMPX insider transactions
Every Form 4 filed by Compass Therapeutics, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | Lerner Neil | Chief Accounting Officer | P · Purchase | Direct | 20,000 | $0.92 | $18K | Form 4 |
| Sep 24, 2026 | Lerner Neil | Chief Accounting Officer | P · Purchase | Direct | 2,500 | $1.14 | $3K | Form 4 |
CMPX insider trading FAQ
Are insiders buying CMPX stock?
Yes. In the last 90 days, Compass Therapeutics, Inc. insiders made 2 open-market purchases totaling $21K, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading CMPX?
Recent buyers: Lerner Neil.
Where does CMPX insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.