Calamos S&P 500 Alt Prot OctCPSOETF
13F holders, Q2 2025 (June 30)11holders
2new positions
2sold out
$26.23avg. 13F price*
At the end of Q2 2025, 11 institutions reported holding Calamos S&P 500 Alt Prot Oct (CPSO) in their 13F filings, unchanged from Q1 2025. 2 opened new positions and 2 sold out. The largest holders were Calamos Advisors LLC ($6.7M), Commonwealth Equity Services, LLC ($758K) and Calamos Wealth Management LLC ($488K).
- Company
- Calamos S&P 500 Alt Prot Oct
- CUSIP
- 12811T829
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $459K |
| Exits | 2 | $2.3M |
All 13F filers, Q1 2025 → Q2 2025: 71,754 shares bought and 112,986 shares sold, net −41,232 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 11 holders
| Calamos Advisors LLC | 0.04% | Add +26.6% | 256,972 | $6.7M |
| Commonwealth Equity Services, LLC | 0.00% | No change | 28,910 | $758K |
| Calamos Wealth Management LLC | 0.02% | Reduce -50.8% | 18,613 | $488K |
| Susquehanna International Group, LLP | 0.00% | Reduce -0.9% | 16,641 | $437K |
| Old Mission Capital LLC | 0.01% | New | 15,509 | $407K |
| Capital Analysts, LLC | 0.01% | No change | 11,151 | $292K |
| Sloy Dahl & Holst, LLC | 0.04% | No change | 10,740 | $282K |
| Harbour Investments, Inc. | 0.00% | Reduce -43.4% | 2,557 | $67K |
| Morgan Stanley | 0.00% | New | 2,000 | $52K |
| UBS Group AG | 0.00% | Add +17.9% | 1,452 | $38K |
| Creative Financial Designs Inc. | 0.00% | Reduce -6.7% | 503 | $13K |
"% of holder's portfolio" is CPSO's weight in each manager's 13F, not the share of Calamos S&P 500 Alt Prot Oct the manager owns.