Institutional shares held 101 Million
18.2K calls
2.51M puts
Total value of holdings $473M
$85K calls
$11.7M puts
Market Cap $474M
101,285,000 Shares Out.
Institutional ownership 99.75%
# of Institutions 105


Latest Institutional Activity in CMPX

Top Purchases

Q3 2025
Apollon Wealth Management, LLC Shares Held: 10K ($46.9K)
Q3 2025
Cwm, LLC Shares Held: 1.89K ($8.85K)
Q3 2025
Farther Finance Advisors, LLC Shares Held: 388 ($1.82K)
Q2 2025
Suvretta Capital Management, LLC Shares Held: 7.15M ($33.5M)
Q2 2025
Vivo Capital, LLC Shares Held: 6.04M ($28.3M)

Top Sells

Q3 2025
Voya Investment Management LLC Shares Held: 17.2K ($80.6K)
Q3 2025
Fortitude Family Office, LLC Shares Held: 4.98K ($23.3K)
Q2 2025
Orbimed Advisors LLC Shares Held: 15.2M ($71.2M)
Q2 2025
Bio Impact Capital LLC Shares Held: 5.62M ($26.3M)
Q2 2025
Morgan Stanley Shares Held: 249K ($1.16M)

About CMPX

Compass Therapeutics, Inc., a clinical-stage oncology-focused biopharmaceutical company, engages in developing antibody-based therapeutics to treat various human diseases. The company's product candidates in the clinical stage of development include CTX-009, an investigational bispecific antibody that blocks Delta-like ligand 4/Notch and vascular endothelial growth factor A signaling pathways, which are critical to angiogenesis and tumor vascularization; and CTX-471, an IgG4 monoclonal antibody that is an agonist of CD137. Its product candidates also comprise CTX-8371, a bispecific inhibitor that targets PD-1 and PD-L1. The company was founded in 2014 and is headquartered in Boston, Massachusetts.


Insider Transactions at CMPX

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
450K Shares
From 4 Insiders
Open market or private purchase 50K shares
Grant, award, or other acquisition 400K shares
Sell / Disposition
7.24M Shares
From 3 Insiders
Open market or private sale 7.14M shares
Payment of exercise price or tax liability 99.7K shares

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