Calamos S&P 500 Alt SeptCPSTETF
13F holders, Q3 2025 (September 30)17holders +3
5new positions
2sold out
$26.71avg. 13F price*
At the end of Q3 2025, 17 institutions reported holding Calamos S&P 500 Alt Sept (CPST) in their 13F filings, up 3 from Q2 2025. 5 opened new positions and 2 sold out. The largest holders were Calamos Advisors LLC ($6.8M), Calamos Wealth Management LLC ($3.6M) and Camelot Portfolios, LLC ($697K).
- Company
- Calamos S&P 500 Alt Sept
- CUSIP
- 12811T886
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $1.5M |
| Exits | 2 | $237K |
All 13F filers, Q2 2025 → Q3 2025: 67,783 shares bought and 19,069 shares sold, net +48,714 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 17 holders
| Calamos Advisors LLC | 0.04% | Reduce -0.8% | 256,325 | $6.8M |
| Calamos Wealth Management LLC | 0.13% | Add +6.6% | 136,492 | $3.6M |
| Camelot Portfolios, LLC | 0.41% | Reduce -0.3% | 26,108 | $697K |
| Commonwealth Equity Services, LLC | 0.00% | Add +4.8% | 20,483 | $547K |
| Harbour Investments, Inc. | 0.01% | New | 15,495 | $414K |
| Capital Analysts, LLC | 0.01% | Reduce -6.0% | 13,745 | $367K |
| Old Mission Capital LLC | 0.01% | Reduce -26.0% | 13,516 | $361K |
| Jane Street Group, LLC | 0.00% | New | 12,870 | $344K |
| Grantvest Financial Group LLC | 0.23% | New | 12,212 | $326K |
| Susquehanna International Group, LLP | 0.00% | Reduce -17.4% | 10,265 | $274K |
| Osaic Holdings, Inc. | 0.00% | No change | 9,655 | $256K |
| Pallas Capital Advisors LLC | 0.01% | New | 9,522 | $254K |
| Hohimer Wealth Management, LLC | 0.03% | No change | 8,888 | $237K |
| Sterling Financial Planning, Inc. | 0.07% | No change | 8,018 | $214K |
| Burkett Financial Services, LLC | 0.07% | Add +107.9% | 7,237 | $193K |
| Principal Securities, Inc. | 0.00% | New | 4,553 | $122K |
| Creative Financial Designs Inc. | 0.00% | No change | 299 | $8K |
"% of holder's portfolio" is CPST's weight in each manager's 13F, not the share of Calamos S&P 500 Alt Sept the manager owns.