COMPASS THERAPEUTICS INC (CMPX) Institutional Ownership Changes & 13F Activity
COMPASS THERAPEUTICS INC (CMPX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Adage Capital Partners Gp, L.L.C., Palo Alto Investors Lp, Millennium Management Llc, Aqr Capital Management Llc, and Citadel Advisors Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +751 | +1.1% | 68,217 | $149.40K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Buy | +2,849,264 | +395.0% | 3,570,674 | $7.82M | Q2 2026 | Sep 02, 2026 |
| Optimize Financial Inc | Sell | -279 | -0.3% | 80,160 | $175.55K | Q2 2026 | Aug 27, 2026 |
| California State Teachers Retirement System | Sell | -44,603 | -39.7% | 67,713 | $148.29K | Q2 2026 | Aug 24, 2026 |
| Palo Alto Investors Lp | Buy | +4,317,309 | +285.1% | 5,831,813 | $12.77M | Q2 2026 | Aug 19, 2026 |
| Mercer Global Advisors Inc | Buy | +106,570 | — | 106,570 | $233.39K | Q2 2026 | Aug 19, 2026 |
| Seven Fleet Capital Management Lp | Sell | -283,906 | -54.9% | 233,066 | $510.42K | Q2 2026 | Aug 17, 2026 |
| Adage Capital Partners Gp, L.L.C. | Sell | -7,300,000 | -86.0% | 1,186,500 | $2.60M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +3,867,027 | +457.0% | 4,713,247 | $10.32M | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Buy | +3,308,709 | +1650.8% | 3,509,137 | $7.69M | Q2 2026 | Aug 14, 2026 |
| Vivo Capital, Llc | Sell | -1,788,406 | -18.7% | 7,757,060 | $16.99M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +1,535,606 | +77.0% | 3,531,000 | $7.73M | Q2 2026 | Aug 14, 2026 |
| Kingdon Capital Management, L.L.C. | Buy | +1,400,000 | — | 1,400,000 | $3.07M | Q2 2026 | Aug 14, 2026 |
| Tang Capital Management Llc | Buy | +1,199,973 | +7.1% | 17,990,782 | $39.40M | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | Buy | +1,137,133 | +44.6% | 3,687,489 | $8.08M | Q2 2026 | Aug 14, 2026 |
| Schonfeld Strategic Advisors Llc | Sell | -983,777 | -91.4% | 92,227 | $201.97K | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Buy | +957,305 | +1906.9% | 1,007,507 | $2.21M | Q2 2026 | Aug 14, 2026 |
| Blackstone Inc. | Buy | +899,936 | — | 899,936 | $1.97M | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Sell | -739,644 | -93.6% | 50,397 | $110.37K | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | Buy | +686,577 | — | 686,577 | $1.50M | Q2 2026 | Aug 14, 2026 |
| Artia Global Partners Lp | Buy | +383,200 | — | 383,200 | $839.21K | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Sell | -298,694 | -34.5% | 566,919 | $1.24M | Q2 2026 | Aug 14, 2026 |
| Two Sigma Investments, Lp | Buy | +287,212 | +867.7% | 320,312 | $701.48K | Q2 2026 | Aug 14, 2026 |
| Royce & Associates Lp | Sell | -283,018 | -17.5% | 1,336,780 | $2.93M | Q2 2026 | Aug 14, 2026 |
| Exome Asset Management Llc | Buy | +276,165 | — | 276,165 | $604.80K | Q2 2026 | Aug 14, 2026 |
| Caption Management, Llc | Buy | +263,577 | — | 263,577 | $577.23K | Q2 2026 | Aug 14, 2026 |
| Acuta Capital Partners, Llc | Sell | -253,863 | -29.9% | 595,213 | $1.30M | Q2 2026 | Aug 14, 2026 |
| Rock Springs Capital Management Lp | Buy | +219,621 | +6.6% | 3,524,929 | $7.72M | Q2 2026 | Aug 14, 2026 |
| Orion Porfolio Solutions, Llc | Buy | +213,863 | — | 213,863 | $468.36K | Q2 2026 | Aug 14, 2026 |
| Birchview Capital, Lp | Buy | +209,133 | +14.3% | 1,675,000 | $3.67M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about CMPX activity
Which institutional owners are buying CMPX?
Institutional owners buying CMPX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in CMPX activity?
"Buy" means an investor increased their reported position in CMPX compared to the prior reporting period. This reflects growing exposure to COMPASS THERAPEUTICS INC (CMPX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in CMPX increasing?
Institutional interest in CMPX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related CMPX Institutional Insights
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- Institutional Portfolio Overlap & Shared Holdings
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- CMPX Insider Trading & SEC Form 4 Activity
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