# CALAMOS ETF TR S&P 500 STR MARC

CALAMOS ETF TR S&P 500 STR MARC is a security (CUSIP 12811T761) tracked across SEC portfolio filings. 21 institutional managers reported $16.4M on Form 13F as of 2026-06-30.

## Summary

- Issuer: CALAMOS ETF TR
- Class: S&P 500 STR MARC
- CUSIP: 12811T761
- 13F holders: 21
- 13F value: $16.4M
- 13F period: 2026-06-30
- N-PORT fund positions: 0

## Top institutional holders (Form 13F)

_Showing 15 of 21 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [Calamos Advisors LLC](https://search.stillhousedata.com/firm/105758) | NAPERVILLE, IL | $9.6M | 371,322 |
| [Calamos Wealth Management LLC](https://search.stillhousedata.com/firm/143490) | NAPERVILLE, IL | $1.9M | 72,288 |
| [COMMONWEALTH EQUITY SERVICES, LLC](https://search.stillhousedata.com/firm/8032) | WALTHAM, MA | $718K | 27,797 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $713K | 28,207 |
| [Farther Finance Advisors, LLC](https://search.stillhousedata.com/firm/302050) | SAN FRANCISCO, CA | $463K | 17,921 |
| [Blue Water Asset Management](https://search.stillhousedata.com/firm/175362) | GRAND RAPIDS, MI | $431K | 16,665 |
| [Fortitude Advisory Group L.L.C.](https://search.stillhousedata.com/firm/116083) | GIG HARBOR, WA | $393K | 15,189 |
| [STOLZ & ASSOCIATES, PS](https://search.stillhousedata.com/firm/117216) | TACOMA, WA | $296K | 11,455 |
| [Cetera Investment Advisers](https://search.stillhousedata.com/firm/105644) | SCHAUMBURG, IL | $293K | 11,580 |
| [JIM SAULNIER & ASSOCIATES, LLC](https://search.stillhousedata.com/firm/169889) | FORT COLLINS, CO | $282K | 10,901 |
| ADAMSBROWN WEALTH CONSULTANTS LLC | GREAT BEND, KS | $276K | 10,665 |
| [Garden State Investment Advisory Services LLC](https://search.stillhousedata.com/firm/133088) | Red Bank, NJ | $268K | 10,605 |
| JANE STREET GROUP, LLC | NEW YORK, NY | $253K | 10,008 |
| [Waverly Advisors, LLC](https://search.stillhousedata.com/firm/115332) | BIRMINGHAM, AL | $244K | 9,660 |
| MML INVESTORS SERVICES, LLC | SPRINGFIELD, MA | $201K | 7,935 |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/12811T761.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.