Institutional shares held 101 Million
18.2K calls
2.51M puts
Total value of holdings $320M
$57K calls
$7.94M puts
Market Cap $321M
101,285,000 Shares Out.
Institutional ownership 99.75%
# of Institutions 103


Latest Institutional Activity in CMPX

Top Purchases

Q2 2025
Suvretta Capital Management, LLC Shares Held: 7.15M ($22.7M)
Q2 2025
Vivo Capital, LLC Shares Held: 6.04M ($19.2M)
Q2 2025
Tang Capital Management LLC Shares Held: 13.5M ($42.8M)
Q2 2025
Caption Management, LLC Shares Held: 726K ($2.3M)
Q2 2025
Dafna Capital Management LLC Shares Held: 527K ($1.67M)

Top Sells

Q2 2025
Orbimed Advisors LLC Shares Held: 15.2M ($48.2M)
Q2 2025
Bio Impact Capital LLC Shares Held: 5.62M ($17.8M)
Q2 2025
Morgan Stanley Shares Held: 249K ($789K)
Q2 2025
Sg Americas Securities, LLC Shares Held: 373K ($1.18M)
Q2 2025
Blue Owl Capital Holdings LP Shares Held: 2.59M ($8.22M)

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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