# CALAMOS RUSSELL 2000 STRUCTURED ALT PROTECTION ETF - OCTOBER ETF

CALAMOS RUSSELL 2000 STRUCTURED ALT PROTECTION ETF - OCTOBER ETF is a security (CUSIP 12811T118) tracked across SEC portfolio filings. 24 institutional managers reported $10.5M on Form 13F as of 2026-06-30.

## Summary

- Issuer: CALAMOS RUSSELL 2000 STRUCTURED ALT PROTECTION ETF - OCTOBER
- Class: ETF
- CUSIP: 12811T118
- 13F holders: 24
- 13F value: $10.5M
- 13F period: 2026-06-30
- N-PORT fund positions: 0

## Top institutional holders (Form 13F)

_Showing 15 of 24 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [HARBOUR INVESTMENTS, INC.](https://search.stillhousedata.com/firm/19258) | MADISON, WI | $2.5M | 93,645 |
| [COMMONWEALTH EQUITY SERVICES, LLC](https://search.stillhousedata.com/firm/8032) | WALTHAM, MA | $2.3M | 79,982 |
| [Owen LaRue, LLC](https://search.stillhousedata.com/firm/289436) | ELIZABETHTOWN, KY | $1.5M | 54,121 |
| [Calamos Wealth Management LLC](https://search.stillhousedata.com/firm/143490) | NAPERVILLE, IL | $781K | 27,738 |
| [WEALTH ENHANCEMENT ADVISORY SERVICES, LLC](https://search.stillhousedata.com/firm/116407) | PLYMOUTH, MN | $735K | 26,048 |
| [OLD MISSION CAPITAL LLC](https://search.stillhousedata.com/firm/146991) | CHICAGO, IL | $613K | 22,578 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $401K | 14,772 |
| [Rooted Wealth Advisors, Inc.](https://search.stillhousedata.com/firm/313759) | BOURBONNAIS, IL | $353K | 12,546 |
| [Sloy Dahl & Holst, LLC](https://search.stillhousedata.com/firm/110102) | Vancouver, WA | $274K | 10,080 |
| [Astoria Portfolio Advisors LLC.](https://search.stillhousedata.com/firm/288271) | NEW YORK, NY | $270K | 9,568 |
| [STOLZ & ASSOCIATES, PS](https://search.stillhousedata.com/firm/117216) | TACOMA, WA | $269K | 9,530 |
| [MGO ONE SEVEN LLC](https://search.stillhousedata.com/firm/283087) | Beachwood, OH | $254K | 9,000 |
| [Farther Finance Advisors, LLC](https://search.stillhousedata.com/firm/302050) | SAN FRANCISCO, CA | $57K | 2,022 |
| [Legacy Investment Solutions, LLC](https://search.stillhousedata.com/firm/322695) | BOISE, ID | $50K | 2,020 |
| CREATIVE FINANCIAL DESIGNS INC /ADV | KOKOMO, IN | $47K | 1,651 |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/12811T118.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.