CMPX
insider transactionsCompass Therapeutics, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 2 different insiders made open-market purchases in the last 90 days, totalling $75.6K.
Net shares · 90d
+40.0K
40.0K buy · 0 sell
Net value · 90d
$75.6K
$75.6K in · $0 out
Sentiment · 90d
Net buying
100% buying · 0% selling
Open-market trades · 90d
2
40.0K buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Grant·A
Chief Accounting Officer
$28.4K
15.0K sh · $1.89
Own +4%
-
Grant·A
General Counsel
$47.2K
25.0K sh · $1.89
Own +15%
-
Buy·P
Chief Accounting Officer
$28.4K
15.0K sh · $1.89
Own +4%
-
Buy·P
General Counsel
$47.2K
25.0K sh · $1.89
Own +15%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Apr 29, 2026 | Neil Lerner | Grant A | 15.0K | $28.4K |
| Apr 29, 2026 | Jonathan Anderman | Grant A | 25.0K | $47.2K |
| Apr 29, 2026 | Neil Lerner | Buy P | 15.0K | $28.4K |
| Apr 29, 2026 | Jonathan Anderman | Buy P | 25.0K | $47.2K |
About CMPX insider trading
This page tracks insider transactions for Compass Therapeutics, Inc. (CMPX) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.