# Calamos Laddered S&P 500 Structured Alt Protection ETF

Calamos Laddered S&P 500 Structured Alt Protection ETF is a ETF series of Calamos ETF Trust (series S000088047). Net assets $108.7M as of 2026-04-30.

## Profile

- Series ID: S000088047
- Registrant: Calamos ETF Trust
- LEI: 5299009VWTW8TBHTY679
- Net assets: $108.7M
- Total assets: $108.7M
- As of: 2026-04-30
- Type: ETF, Fund of funds

## Advisers

- [Calamos Advisors LLC (Advisor)](https://search.stillhousedata.com/firm/105758)

## Top holdings (12 reported)

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Calamos S&P 500 Structured Alt Protection ETF - April](https://search.stillhousedata.com/security/12811T753) | — | $9.1M | 839.78% |
| [Calamos S&P 500 Structured Alt Protection ETF - March](https://search.stillhousedata.com/security/12811T761) | — | $9.1M | 833.82% |
| [Calamos S&P 500 Structured Alt Protection ETF - July](https://search.stillhousedata.com/security/12811T803) | — | $9.1M | 833.40% |
| [Calamos S&P 500 Structured Alt Protection ETF - August](https://search.stillhousedata.com/security/12811T704) | — | $9.1M | 833.36% |
| [Calamos S&P 500 Structured Alt Protection ETF - February](https://search.stillhousedata.com/security/12811T779) | — | $9.1M | 833.15% |
| [Calamos S&P 500 Structured Alt Protection ETF - June](https://search.stillhousedata.com/security/12811T746) | — | $9.1M | 833.13% |
| [Calamos S&P 500 Structured Alt Protection ETF - October](https://search.stillhousedata.com/security/12811T829) | — | $9.1M | 832.83% |
| [Calamos S&P 500 Structured Alt Protection ETF - September](https://search.stillhousedata.com/security/12811T886) | — | $9.0M | 831.64% |
| [Calamos S&P 500 Structured Alt Protection ETF - November](https://search.stillhousedata.com/security/12811T811) | — | $9.0M | 831.43% |
| [Calamos S&P 500 Structured Alt Protection ETF - December](https://search.stillhousedata.com/security/12811T795) | — | $9.0M | 830.69% |
| [Calamos S&P 500 Structured Alt Protection ETF - January](https://search.stillhousedata.com/security/12811T787) | — | $9.0M | 830.50% |
| [Calamos S&P 500 Structured Alt Protection ETF - May](https://search.stillhousedata.com/security/12811T605) | — | $9.0M | 829.94% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-04-30 | $108.7M |
| 2026-01-31 | $95.7M |
| 2025-10-31 | $83.6M |
| 2025-07-31 | $81.4M |
| 2025-04-30 | $57.5M |
| 2025-01-31 | $47.0M |
| 2024-10-31 | $24.7M |

## More

- [Registrant: Calamos ETF Trust](https://search.stillhousedata.com/registrant/1579881)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000088047.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.