// company-profile
Compass Therapeutics, Inc.
CMPXExchangeNasdaqSectorBiological Products, (No Diagnostic Substances)Inc.DEFilings51Insiders16
// api This Compass Therapeutics, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, Compass Therapeutics, Inc. insiders bought $151K across 4 transactions with no open-market sales.
- Most active insider: Anderman Jonathan with 2 transactions totaling $95K.
- Largest single purchase: $47K by Anderman Jonathan on Apr 29, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Compass Therapeutics, Inc. as of 2026-03-31
Total reported AUM
$917.3M
QoQ change
+15.2%
Reporting period
2026-03-31
#1
TANG CAPITAL MANAGEMENT LLC
CIK 1232621
$88.8M
16.8M shares
#2
ORBIMED ADVISORS LLC
CIK 1055951
$80.5M
15.2M shares
#3
SUVRETTA CAPITAL MANAGEMENT, LLC
CIK 1569064
$75.7M
14.3M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Apr 29, 2026 | Lerner Neil | CMPX | Purchase | 15,000 | $1.89 | $28K |
| Apr 29, 2026 | Lerner Neil | CMPX | Award | 15,000 | $1.89 | $28K |
| Apr 29, 2026 | Anderman Jonathan | CMPX | Award | 25,000 | $1.89 | $47K |
| Apr 29, 2026 | Anderman Jonathan | CMPX | Purchase | 25,000 | $1.89 | $47K |
| Feb 8, 2026 | Schuetz Thomas J. | CMPX | Tax Withholding | 36,687 | $6.52 | $239K |
45 more transactions hidden
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