# Calamos Timpani Active Growth Opportunities ETF — new fund registration

Calamos ETF Trust registered 1 new fund series on Form 485APOS, filed 2026-04-07. Featured series: Calamos Timpani Active Growth Opportunities ETF.

## Registration

- Registrant / trust: Calamos ETF Trust
- CIK: 0001579881
- Form: 485APOS
- Filed: 2026-04-07
- State of incorporation: DE
- Accession: 0001104659-26-040498

## Series & classes (1)

| Series | Class | Ticker | New |
| --- | --- | --- | --- |
| [Calamos Timpani Active Growth Opportunities ETF](https://search.stillhousedata.com/fund/S000105822) | Calamos Timpani Active Growth Opportunities ETF | — | Yes |

## Fees (from the effective prospectus)

- 12b-1 fee: 0.00%
- Gross expense ratio: 0.79%
- Management fee: 0.79%
- Other expenses: 0.00%

## Investment objective

Calamos Timpani Active SMID Growth ETF (the Fund) seeks capital appreciation.

## Other filings by this registrant (15)

- [485APOS — 2026-07-31 (1 new series)](https://search.stillhousedata.com/launch/0001104659-26-089180)
- [485APOS — 2026-07-31 (1 new series)](https://search.stillhousedata.com/launch/0001104659-26-089292)
- [485APOS — 2026-04-07 (1 new series)](https://search.stillhousedata.com/launch/0001104659-26-040487)
- [485APOS — 2026-01-28 (1 new series)](https://search.stillhousedata.com/launch/0001104659-26-007375)
- [485APOS — 2026-01-28 (1 new series)](https://search.stillhousedata.com/launch/0001104659-26-007366)
- [485APOS — 2025-09-29](https://search.stillhousedata.com/launch/0001104659-25-094378)
- [485APOS — 2025-09-29](https://search.stillhousedata.com/launch/0001104659-25-094376)
- [485APOS — 2025-09-29](https://search.stillhousedata.com/launch/0001104659-25-094377)
- [485APOS — 2025-09-29](https://search.stillhousedata.com/launch/0001104659-25-094374)
- [485APOS — 2025-08-22 (1 new series)](https://search.stillhousedata.com/launch/0001104659-25-081943)
- [485APOS — 2025-08-20](https://search.stillhousedata.com/launch/0001104659-25-080971)
- [485APOS — 2025-07-16 (1 new series)](https://search.stillhousedata.com/launch/0001104659-25-068250)

## More

- [Registrant profile: Calamos ETF Trust](https://search.stillhousedata.com/registrant/1579881)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/launch/0001104659-26-040498.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.