Calamos S&P 500 Alt Prot OctCPSOETF
13F holders, Q4 2025 (December 31)23holders +12
10new positions
0sold out
$27.06avg. 13F price*
At the end of Q4 2025, 23 institutions reported holding Calamos S&P 500 Alt Prot Oct (CPSO) in their 13F filings, up 12 from Q3 2025. 10 opened new positions and 0 sold out. The largest holders were Calamos Advisors LLC ($7.8M), Blue Water Asset Management ($838K) and Susquehanna International Group, LLP ($785K).
- Company
- Calamos S&P 500 Alt Prot Oct
- CUSIP
- 12811T829
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 10 | $1.8M |
| Exits | 0 | $0 |
All 13F filers, Q3 2025 → Q4 2025: 149,500 shares bought and 3,930 shares sold, net +145,570 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 23 holders
| Calamos Advisors LLC | 0.05% | Add +12.5% | 286,646 | $7.8M |
| Blue Water Asset Management | 0.30% | — | 30,966 | $838K |
| Susquehanna International Group, LLP | 0.00% | Add +286.0% | 29,006 | $785K |
| Calamos Wealth Management LLC | 0.02% | Add +66.1% | 25,915 | $701K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -9.4% | 25,756 | $697K |
| Harbour Investments, Inc. | 0.01% | Add +1239.8% | 21,128 | $572K |
| Old Mission Capital LLC | 0.02% | New | 17,494 | $473K |
| Grantvest Financial Group LLC | 0.29% | New | 16,795 | $455K |
| TrustBank | 0.17% | — | 15,100 | $409K |
| Rooted Wealth Advisors, Inc. | 0.10% | No change | 12,486 | $339K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | New | 11,989 | $324K |
| Capital Analysts, LLC | 0.01% | No change | 11,151 | $302K |
| Sloy Dahl & Holst, LLC | 0.03% | No change | 10,740 | $291K |
| Security Financial Services, INC. | 0.04% | New | 10,132 | $274K |
| Spire Wealth Management | 0.00% | New | 2,401 | $65K |
| Osaic Holdings, Inc. | 0.00% | New | 2,046 | $55K |
| Morgan Stanley | 0.00% | No change | 2,000 | $54K |
| Tucker Asset Management LLC | 0.01% | New | 1,782 | $48K |
| Camelot Portfolios, LLC | 0.03% | New | 1,615 | $44K |
| Motiv8 Investments LLC | 0.02% | New | 1,343 | $36K |
| Creative Financial Designs Inc. | 0.00% | Add +66.6% | 838 | $23K |
| New England Capital Financial Advisors LLC | 0.00% | New | 448 | $12K |
| UBS Group AG | 0.00% | Reduce -92.7% | 100 | $3K |
"% 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.