CPST — Calamos S&P 500 Structured Alt Protection ETF September
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Largest institutional holders
| manager | value | shares |
|---|---|---|
| Calamos Advisors LLC | 11.7M | 433.0K |
| OSAIC HOLDINGS, INC. | 2.8M | 104.3K |
| Calamos Wealth Management LLC | 2.8M | 102.3K |
| OLD MISSION CAPITAL LLC | 770.5K | 28.6K |
| Camelot Portfolios, LLC | 680.8K | 25.2K |
| COMMONWEALTH EQUITY SERVICES, LLC | 552.5K | 20.5K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 519.1K | 19.2K |
| Blue Water Asset Management | 446.5K | 16.6K |
| LeClair Wealth Partners LLC | 446.5K | 16.6K |
| Grantvest Financial Group LLC | 329.4K | 12.2K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
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