CALAMOS ETF TR S&P 500 STR OCTO is a security (CUSIP 12811T829) tracked across SEC portfolio filings. 22 institutional managers reported $14.6M on Form 13F as of 2026-06-30.
Showing 15 of 22 managers by value.
| Manager | Location | Value | Shares |
|---|---|---|---|
| Calamos Advisors LLC | NAPERVILLE, IL | $9.6M | 344,453 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $719K | 26,635 |
| COMMONWEALTH EQUITY SERVICES, LLC | WALTHAM, MA | $670K | 24,062 |
| Blue Water Asset Management | GRAND RAPIDS, MI | $570K | 20,481 |
| Calamos Wealth Management LLC | NAPERVILLE, IL | $553K | 19,867 |
| OLD MISSION CAPITAL LLC | CHICAGO, IL | $511K | 18,918 |
| Grantvest Financial Group LLC | MATAWAN, NJ | $396K | 14,679 |
| HARBOUR INVESTMENTS, INC. | MADISON, WI | $388K | 14,365 |
| Rooted Wealth Advisors, Inc. | BOURBONNAIS, IL | $348K | 12,486 |
| Sloy Dahl & Holst, LLC | Vancouver, WA | $290K | 10,740 |
| Security Financial Services, INC. | Fort Wayne, IN | $282K | 10,132 |
| Spire Wealth Management | MCLEAN, VA | $67K | 2,401 |
| OSAIC HOLDINGS, INC. | PHOENIX, AZ | $55K | 2,046 |
| MORGAN STANLEY | NEW YORK, NY | $54K | 2,000 |
| TUCKER ASSET MANAGEMENT LLC | LITTLETON, CO | $48K | 1,782 |