Institutional shares held 101 Million
2.52M calls
3.1M puts
Total value of holdings $317M
$7.94M calls
$9.77M puts
Market Cap $311M
101,285,000 Shares Out.
Institutional ownership 99.38%
# of Institutions 125


Latest Institutional Activity in CMPX

Top Purchases

Q2 2025
Simplicity Wealth,Llc Shares Held: 84.6K ($260K)
Q2 2025
Mcf Advisors LLC Shares Held: 2.77K ($8.5K)
Q1 2025
Tang Capital Management LLC Shares Held: 11.1M ($33.9M)
Q1 2025
Jpmorgan Chase & CO Shares Held: 2.19M ($6.71M)
Q1 2025
Silverarc Capital Management, LLC Shares Held: 875K ($2.69M)

Top Sells

Q2 2025
Act Advisors, Llc. Shares Held: 10.4K ($31.9K)
Q2 2025
Fortitude Family Office, LLC Shares Held: 4.98K ($15.3K)
Q1 2025
Adage Capital Partners Gp, L.L.C. Shares Held: 3.98M ($12.2M)
Q1 2025
Baker Bros. Advisors LP Shares Held: 547K ($1.68M)
Q1 2025
Rock Springs Capital Management LP Shares Held: 4.96M ($15.2M)

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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