# Calamos ETF Trust

Calamos ETF Trust (CIK 1579881) is an SEC-registered fund company with 44 reporting fund series and $2.9B in net assets as of 2026-04-30.

## Registrant

- CIK: 1579881
- File number: 811-22887
- LEI: 549300B2KP9WEFDULJ54
- Address: 2020 CALAMOS COURT, NAPERVILLE, US-IL, 60563
- Phone: 630-245-7200
- Net assets: $2.9B
- Total assets: $3.1B
- Fund series: 44
- Latest report: 2026-04-30

## Fund series (44)

_Showing 25 of 44 series._

| Series | Net assets |
| --- | --- |
| [Calamos Autocallable Income ETF](https://search.stillhousedata.com/fund/S000093393) | $871.9M |
| [Calamos Tax-Aware Collateral ETF](https://search.stillhousedata.com/fund/S000102580) | $825.2M |
| [Calamos Nasdaq Autocallable Income ETF](https://search.stillhousedata.com/fund/S000096613) | $167.1M |
| [Calamos Laddered S&P 500 Structured Alt Protection ETF](https://search.stillhousedata.com/fund/S000088047) | $108.7M |
| [Calamos S&P 500 Structured Alt Protection ETF - May](https://search.stillhousedata.com/fund/S000084800) | $53.0M |
| [Calamos Russell 2000 Structured Alt Protection ETF - January](https://search.stillhousedata.com/fund/S000085630) | $49.9M |
| [Calamos S&P 500 Structured Alt Protection ETF - December](https://search.stillhousedata.com/fund/S000086980) | $45.0M |
| [Calamos S&P 500 Structured Alt Protection ETF - August](https://search.stillhousedata.com/fund/S000084798) | $42.6M |
| [Calamos S&P 500 Structured Alt Protection ETF - July](https://search.stillhousedata.com/fund/S000084801) | $41.2M |
| [Calamos S&P 500 Structured Alt Protection ETF - November](https://search.stillhousedata.com/fund/S000086985) | $34.3M |
| [Calamos S&P 500 Structured Alt Protection ETF - February](https://search.stillhousedata.com/fund/S000086981) | $33.2M |
| [Calamos Nasdaq-100 Structured Alt Protection ETF - December](https://search.stillhousedata.com/fund/S000084790) | $32.5M |
| [Calamos S&P 500 Structured Alt Protection ETF - September](https://search.stillhousedata.com/fund/S000084799) | $32.4M |
| [Calamos CEF Income & Arbitrage ETF](https://search.stillhousedata.com/fund/S000083148) | $31.8M |
| [Calamos Russell 2000 Structured Alt Protection ETF - October](https://search.stillhousedata.com/fund/S000085632) | $31.3M |
| [Calamos Bitcoin 80 Series Structured Alt Protection ETF - October](https://search.stillhousedata.com/fund/S000090061) | $31.2M |
| [Calamos S&P 500 Structured Alt Protection ETF - March](https://search.stillhousedata.com/fund/S000086984) | $30.9M |
| [Calamos S&P 500 Structured Alt Protection ETF - October](https://search.stillhousedata.com/fund/S000086986) | $26.2M |
| [Calamos S&P 500 Structured Alt Protection ETF - January](https://search.stillhousedata.com/fund/S000086982) | $26.2M |
| [Calamos Nasdaq-100 Structured Alt Protection ETF - June](https://search.stillhousedata.com/fund/S000084791) | $26.2M |
| [Calamos Nasdaq-100 Structured Alt Protection ETF - September](https://search.stillhousedata.com/fund/S000084793) | $25.1M |
| [Calamos Nasdaq Equity & Income ETF](https://search.stillhousedata.com/fund/S000083476) | $24.2M |
| [Calamos Russell 2000 Structured Alt Protection ETF - July](https://search.stillhousedata.com/fund/S000085631) | $23.3M |
| [Calamos Bitcoin 80 Series Structured Alt Protection ETF - January](https://search.stillhousedata.com/fund/S000090058) | $21.9M |
| [Calamos Convertible Equity Alternative ETF](https://search.stillhousedata.com/fund/S000081270) | $21.7M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| Goldman Sachs & Co. LLC | $26.1M |

## More

- [CIK 1579881 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1579881&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/1579881.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.