Form4insider filings, from the source

Company · CIK 0001738021 · SIC 2836 — Biological Products, (No Diagnostic Substances) · Nasdaq

Compass Therapeutics, Inc. · CMPX

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $2,850 · 1sales $0 · 0net $2,850
$10k$10k$100k$100k$1M$1MbuyssalesSep 23Sep 23Sep 23Sep 24Sep 24Sep 24Sep 25

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 24, 2026 PForm 4 →Sep 25, 8:01 am EDTNeil LernerChief Accounting Officer2,500$1.14$2,850400,000+0.63%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.