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CMPX

Compass Therapeutics (CMPX) stock: insider trades, news & valuation

Health Care · Net buying
Close · Oct 9, 2026 $0.99 +1.0% on the day -75.6% over 12 months 52-week range $0.86 – $6.69

Share price and insider trades

CMPX closeInsider buyInsider sale
02468NovDecJan 2026FebMarAprMayJunJulAugSepOctBought $2,850 on 2026-09-24 · Neil LernerBought $18,400 on 2026-10-01 · Neil LernerBought $75,600 on 2026-04-29 · Jonathan Anderman, Neil Lerner
Bought, 12 months$94K
Sold, 12 months$0
Insiders buying2
Insiders selling0

Compass Therapeutics insider trading at a glance (Oct 9, 2026): in the past 12 months, 2 insiders bought $94K and 0 sold $0 of CMPX stock on the open market.

CMPX insider buying and selling by quarter

Open-market purchases (green, above the line) and sales (red, below), by trade date.

Q2 2026: $76K bought (2 trades)$76KQ2 2026Q3 2026: $3K bought (1 trades)$3KQ3 2026Q4 2026: $18K bought (1 trades)$18KQ4 2026
QuarterBoughtPurchasesSoldSales
Q4 2026$18K1—0
Q3 2026$3K1—0
Q2 2026$76K2—0

Valuation, profit and volume

P/E (trailing)n/aSector median 24.7
Market value$179MBiotechnology
Profit margin0.0%Revenue growth —
Volume vs. 50-day1.7×Last 5 sessions
Insiders' paper profit−$35KOn all tracked purchases -35.9%

Summary

Over the past 12 months, 2 Compass Therapeutics, Inc. insiders reported open-market purchases totaling $94K, while 0 insiders reported sales totaling $0.

CMPX stock news and SEC filings

Recent 8-K filings and headlines. Tone is scored from the headline wording; “Policy” marks regulatory, trade or government topics.

Insider transactions

Open-market purchases and sales.

Filed Insider Type Shares Price Value Since Score
Oct 2SEC Neil LernerChief Accounting Officer Buy 20,000420,000 held (+5%) $0.92 $18K +7.9% —
Sep 25SEC Neil LernerChief Accounting Officer Buy 2,500400,000 held (+1%) $1.14 $3K -12.9% —
Apr 30SEC Jonathan AndermanGeneral Counsel Buy 25,000196,000 held (+15%) $1.89 $47K -47.5% —
Apr 30SEC Neil LernerChief Accounting Officer Buy 15,000397,500 held (+4%) $1.89 $28K -47.5% —

Insiders at Compass Therapeutics, Inc.

InsiderBoughtSoldLast filingScore
Neil LernerChief Accounting Officer $50K — Oct 2, 2026 —
Jonathan AndermanGeneral Counsel $47K — Apr 30, 2026 —

Insider activity at other Health Care companies

Same sector, ranked by insider buying in the last 90 days.

  • SLBTSL Science Holding Ltd$10329.90B bought
  • KODKodiak Sciences Inc.$157M bought
  • ADRXADARx Pharmaceuticals, Inc.$87.7M bought
  • ATTOAttovia Therapeutics, Inc.$72.9M bought
  • MPLTMapLight Therapeutics, Inc.$65.5M bought
  • AVRAnteris Technologies Global Corp.$40.4M bought

CMPX stock: common questions

Are Compass Therapeutics, Inc. insiders buying CMPX stock?

In the past 12 months, 2 insiders reported open-market purchases of CMPX worth $94K. The latest was Chief Accounting Officer Neil Lerner bought $18K of CMPX at $0.92.

Are Compass Therapeutics, Inc. insiders selling CMPX stock?

0 insiders reported sales worth $0 over the same period.

Where does this data come from?

Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.

What is CMPX's 52-week range?

Over the past year CMPX has traded between $0.86 and $6.69. It last closed at $0.99 on Oct 9, 2026.