CMPX
Compass Therapeutics, Inc.
Compass Therapeutics, Inc. insider trading
Insiders at Compass Therapeutics, Inc. have been buying its stock on the open market. The largest purchase in the last 30 days was Lerner Neil (Chief Accounting Officer) buying $2.8K of CMPX, filed Sep 25, 2026. Every open-market purchase and sale its officers, directors and 10% owners filed in that time is listed below, each linked to the original Form 4.
- Bought on the open market
- $2.8K
- Sold
- —
- Insiders
- 1
- Latest trade
- Sep 24, 2026
From SEC filings · last 30 days
Recent CMPX insider transactions
Lerner NeilChief Accounting Officer
Bought 2,500 sh at $1.14 · Sep 24, 2026
$2.8K
Filing
SEC Form 4 data, Q3 2024 to Q2 2026
CMPX insider trading by quarter
Between Jul 01, 2024 and Jun 30, 2026, 4 insiders traded CMPX on the open market: 5 purchases worth $155.9K and 1 sale worth $5.7M. In the last four quarters alone: 2 purchases ($75.6K) and 0 sales, by 2 insiders.
| Quarter | Bought | Sold | Insiders |
|---|---|---|---|
| Q2 2026 | +$75.6K2 buys | — | |
| Q1 2026 | — | — | |
| Q4 2025 | — | — | |
| Q3 2025 | — | — | |
| Q2 2025 | +$80.3K3 buys | −$5.7M1 sale | |
| Q1 2025 | — | — | |
| Q4 2024 | — | — | |
| Q3 2024 | — | — |
- Largest purchase
- +$47.3K of CMPX by Anderman Jonathan (General Counsel) on Apr 29, 2026.
- Largest sale
- −$5.7M of CMPX by Gordon Carl L (Director · 10% Owner) on Apr 09, 2025.
Open-market transactions through Jun 30, 2026most recent first
Anderman Jonathan
General Counsel
+$47.3K
Apr 29, 2026
25,000 sh · $1.89
Lerner Neil
Chief Accounting Officer
+$28.4K
Apr 29, 2026
15,000 sh · $1.89
Schuetz Thomas J.
Chief Executive Officer · Director
+$21.1K
May 27, 2025
10,000 sh · $2.11
Gordon Carl L
Director · 10% Owner
−$5.7M
Apr 09, 2025
3,571,428 sh · $1.59
Anderman Jonathan
Gen Counsel & Corporate Sec
+$30.8K
Apr 07, 2025
20,000 sh · $1.54
Lerner Neil
Chief Accounting Officer
+$28.4K
Apr 07, 2025
20,000 sh · $1.42
| Date | Insider | Shares | Price | Value |
|---|---|---|---|---|
| Apr 29, 2026 | Anderman JonathanGeneral Counsel | 25,000 | $1.89 | +$47.3K |
| Apr 29, 2026 | Lerner NeilChief Accounting Officer | 15,000 | $1.89 | +$28.4K |
| May 27, 2025 | Schuetz Thomas J.Chief Executive Officer · Director | 10,000 | $2.11 | +$21.1K |
| Apr 09, 2025 | Gordon Carl LDirector · 10% Owner | 3,571,428 | $1.59 | −$5.7M |
| Apr 07, 2025 | Anderman JonathanGen Counsel & Corporate Sec | 20,000 | $1.54 | +$30.8K |
| Apr 07, 2025 | Lerner NeilChief Accounting Officer | 20,000 | $1.42 | +$28.4K |
From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.
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Questions
- Are CMPX insiders buying or selling?
- Between Sep 24, 2026 and Sep 24, 2026, 1 Compass Therapeutics, Inc. insider made 1 open-market purchase worth $2.8K and no sales, a net purchase of $2.8K.
- How much CMPX stock have insiders bought and sold in the last two years?
- Between Jul 01, 2024 and Jun 30, 2026, 4 Compass Therapeutics, Inc. insiders made 5 open-market purchases worth $155.9K and 1 sale worth $5.7M. In the four quarters to Jun 30, 2026: 2 purchases ($75.6K) and no sales. The largest purchase was Anderman Jonathan buying $47.3K on Apr 29, 2026. The largest sale was Gordon Carl L selling $5.7M on Apr 09, 2025.
- What was the largest recent CMPX insider trade?
- Lerner Neil (Chief Accounting Officer) bought $2.8K of CMPX stock on Sep 24, 2026 at about $1.14 a share.
- When did an insider last buy CMPX shares?
- The most recent open-market purchase on file is Lerner Neil (Chief Accounting Officer) buying $2.8K on Sep 24, 2026.
- Where does CMPX insider trading data come from?
- From the Form 4 filings Compass Therapeutics, Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.
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