Calamos S&P 500 Alt SeptCPSTETF
13F holders, Q1 2026 (March 31)19holders
2new positions
2sold out
$26.98avg. 13F price*
At the end of Q1 2026, 19 institutions reported holding Calamos S&P 500 Alt Sept (CPST) in their 13F filings, unchanged from Q4 2025. 2 opened new positions and 2 sold out. The largest holders were Calamos Advisors LLC ($11.7M), Osaic Holdings, Inc. ($2.8M) and Calamos Wealth Management LLC ($2.8M).
- Company
- Calamos S&P 500 Alt Sept
- CUSIP
- 12811T886
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $966K |
| Exits | 2 | $564K |
All 13F filers, Q4 2025 → Q1 2026: 182,131 shares bought and 53,618 shares sold, net +128,513 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 19 holders
| Calamos Advisors LLC | 0.06% | Add +51.0% | 433,044 | $11.7M |
| Osaic Holdings, Inc. | 0.00% | Reduce -4.5% | 104,344 | $2.8M |
| Calamos Wealth Management LLC | 0.10% | Reduce -18.5% | 102,338 | $2.8M |
| Old Mission Capital LLC | 0.02% | Add +0.1% | 28,562 | $770K |
| Camelot Portfolios, LLC | 0.51% | Reduce -2.0% | 25,239 | $681K |
| Commonwealth Equity Services, LLC | 0.00% | No change | 20,483 | $553K |
| Susquehanna International Group, LLP | 0.00% | New | 19,245 | $519K |
| Blue Water Asset Management | 0.15% | No change | 16,552 | $446K |
| LeClair Wealth Partners LLC | 0.15% | New | 16,552 | $446K |
| Capital Analysts, LLC | 0.01% | No change | 13,745 | $371K |
| Grantvest Financial Group LLC | 0.21% | No change | 12,212 | $329K |
| Harbour Investments, Inc. | 0.00% | Reduce -25.4% | 11,556 | $312K |
| Spartan Wealth Advisory Services LLC | 0.03% | — | 10,709 | $289K |
| Hohimer Wealth Management, LLC | 0.03% | No change | 8,888 | $240K |
| Sterling Financial Planning, Inc. | 0.06% | No change | 8,018 | $216K |
| Burkett Financial Services, LLC | 0.07% | Reduce -0.5% | 7,200 | $194K |
| Sound Income Strategies, LLC | 0.00% | No change | 1,608 | $43K |
| Creative Financial Designs Inc. | 0.00% | No change | 301 | $8K |
| UBS Group AG | 0.00% | Reduce -80.4% | 37 | $998 |
"% 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.