Calamos S&P 500 Alt Prot OctCPSOETF
13F holders, Q1 2026 (March 31)20holders −3
2new positions
4sold out
$27.01avg. 13F price*
At the end of Q1 2026, 20 institutions reported holding Calamos S&P 500 Alt Prot Oct (CPSO) in their 13F filings, down 3 from Q4 2025. 2 opened new positions and 4 sold out. The largest holders were Calamos Advisors LLC ($9.6M), Blue Water Asset Management ($832K) and LeClair Wealth Partners LLC ($832K).
- Company
- Calamos S&P 500 Alt Prot Oct
- CUSIP
- 12811T829
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $864K |
| Exits | 4 | $503K |
All 13F filers, Q4 2025 → Q1 2026: 102,836 shares bought and 32,809 shares sold, net +70,027 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 20 holders
| Calamos Advisors LLC | 0.05% | Add +24.2% | 356,032 | $9.6M |
| Blue Water Asset Management | 0.29% | Reduce -0.5% | 30,803 | $832K |
| LeClair Wealth Partners LLC | 0.29% | New | 30,803 | $832K |
| Susquehanna International Group, LLP | 0.00% | Reduce -8.2% | 26,635 | $719K |
| Calamos Wealth Management LLC | 0.02% | Reduce -1.8% | 25,454 | $687K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -6.6% | 24,062 | $650K |
| Old Mission Capital LLC | 0.01% | Add +8.1% | 18,918 | $511K |
| Grantvest Financial Group LLC | 0.26% | Reduce -12.6% | 14,679 | $396K |
| Harbour Investments, Inc. | 0.01% | Reduce -32.0% | 14,365 | $388K |
| Rooted Wealth Advisors, Inc. | 0.09% | No change | 12,486 | $343K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Reduce -5.0% | 11,385 | $307K |
| Capital Analysts, LLC | 0.01% | No change | 11,151 | $301K |
| Sloy Dahl & Holst, LLC | 0.04% | No change | 10,740 | $290K |
| Security Financial Services, INC. | 0.04% | No change | 10,132 | $274K |
| Spire Wealth Management | 0.00% | No change | 2,401 | $65K |
| Osaic Holdings, Inc. | 0.00% | No change | 2,046 | $55K |
| Morgan Stanley | 0.00% | No change | 2,000 | $54K |
| Advisory Services Network, LLC | 0.00% | New | 1,190 | $32K |
| Creative Financial Designs Inc. | 0.00% | Add +3.9% | 871 | $24K |
| New England Capital Financial Advisors LLC | 0.00% | Reduce -8.9% | 408 | $11K |
"% 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.