Calamos S&P 500 Alt Prot OctCPSOETF
13F holders, Q2 2026 (June 30)21holders +1
2new positions
2sold out
$27.84avg. 13F price*
At the end of Q2 2026, 21 institutions reported holding Calamos S&P 500 Alt Prot Oct (CPSO) in their 13F filings, up 1 from Q1 2026. 2 opened new positions and 2 sold out. The largest holders were Calamos Advisors LLC ($9.6M), Susquehanna International Group, LLP ($1.6M) and Commonwealth Equity Services, LLC ($670K).
- 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 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $357K |
| Exits | 2 | $864K |
All 13F filers, Q1 2026 → Q2 2026: 43,279 shares bought and 72,953 shares sold, net −29,674 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 21 holders
| Calamos Advisors LLC | 0.05% | Reduce -3.3% | 344,453 | $9.6M |
| Susquehanna International Group, LLP | 0.00% | Add +114.3% | 57,083 | $1.6M |
| Commonwealth Equity Services, LLC | 0.00% | No change | 24,062 | $670K |
| Blue Water Asset Management | 0.18% | Reduce -33.5% | 20,481 | $570K |
| Calamos Wealth Management LLC | 0.02% | Reduce -21.9% | 19,867 | $553K |
| Rooted Wealth Advisors, Inc. | 0.09% | No change | 12,486 | $348K |
| Grantvest Financial Group LLC | 0.19% | Reduce -19.0% | 11,888 | $331K |
| Harbour Investments, Inc. | 0.00% | Reduce -19.9% | 11,509 | $320K |
| Old Mission Capital LLC | 0.01% | Reduce -39.4% | 11,472 | $319K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | No change | 11,385 | $317K |
| Capital Analysts, LLC | 0.01% | No change | 11,151 | $310K |
| Fiduciary Financial Advisors | 0.03% | New | 11,049 | $308K |
| Sloy Dahl & Holst, LLC | 0.04% | No change | 10,740 | $299K |
| Security Financial Services, INC. | 0.04% | No change | 10,132 | $282K |
| Spire Wealth Management | 0.00% | No change | 2,401 | $67K |
| Osaic Holdings, Inc. | 0.00% | No change | 2,046 | $57K |
| Morgan Stanley | 0.00% | No change | 2,000 | $56K |
| Tucker Asset Management LLC | 0.01% | New | 1,782 | $50K |
| Regatta Research & Money Management | 0.03% | — | 1,076 | $30K |
| Creative Financial Designs Inc. | 0.00% | Reduce -43.5% | 492 | $14K |
| New England Capital Financial Advisors LLC | 0.00% | No change | 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.