Compass Therapeutics ($CMPX) Insider Trading & Smart Money Activity
Compass Therapeutics, Inc. ($CMPX) has 2 insider trades and 2 13F position changes on file. In the last 12 months on the open market, 1 insider bought ($21.25K) and no insider sold, net +$21.25K.
- Insider buyers (12 mo)
- 1
- Insider sellers (12 mo)
- 0
- Net insider $ (12 mo)
- +$21.25K
- Congress trades (12 mo)
- 0
- 13F moves on file
- 2
- Analyst ratings on file
- 0
CMPX insider buying and selling by quarter
| Quarter | Insider buys | Insider sales | Congress buys / sales | 13F added / cut |
|---|---|---|---|---|
| Q1 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
| Q2 2026 | 0 | 0 | 0 / 0 | 2 / 0 |
| Q3 2026 | 1 · $2.85K | 0 | 0 / 0 | 0 / 0 |
| Q4 2026 | 1 · $18.40K | 0 | 0 / 0 | 0 / 0 |
Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.
All CMPX insider, congress, 13F and analyst activity
| Date | Source | Who | Action | Shares | Value / amount | ΔOwn | 1W | 1M | 6M | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Insider | Lerner NeilChief Accounting Officer | Buy (Open-market buy) | 20K sh | $18.40K | +8.9% | — | |||||
| Insider | Lerner NeilChief Accounting Officer | Buy (Open-market buy) | 2.50K sh | $2.85K | -21.1% | — | |||||
| 13F | Rtw Investments | Added | +1.69M sh | $8.62M | +11.3% | +9.7% | Read | ||||
| 13F | Rtw Investments | Added | +1.69M sh | $8.37M | +11.3% | +9.7% | Read |
1W / 1M / 6M = how CMPX moved from the trade or filing date.
Insider trading in CMPX: who is buying and selling
| Insider | Role | Trades | Open-market net | Shares held | Last trade |
|---|---|---|---|---|---|
| Lerner Neil | Chief Accounting Officer | 2 | +$21.25K | Oct 1, 2026 |
Institutions moving CMPX (13F)
Frequently asked questions
Are CMPX insiders buying or selling?
Over the last 12 months 1 insider made 2 open-market purchases worth $21.25K and 0 insiders made 0 open-market sales worth $0, a net +$21.25K.
What is the latest insider trade in CMPX?
Lerner Neil, Chief Accounting Officer filed a buy (open-market buy) of 20K sh worth $18.40K on Oct 1, 2026.
Which institutions changed their CMPX positions?
Recent 13F filers moving the stock include Rtw Investments.
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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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