21 institutions reported holding $22.7M of CALAMOS ETF TR (CPST) in SEC 13F filings for 2026-03-31. Largest institutional holders: Calamos Advisors LLC ($11.7M), OSAIC HOLDINGS, INC. ($2.8M), Calamos Wealth Management LLC ($2.8M), OLD MISSION CAPITAL LLC ($770,462), Camelot Portfolios, LLC ($680,825). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Calamos Advisors LLC | $11.7M | 433,044 | Added |
| 2 | OSAIC HOLDINGS, INC. | $2.8M | 104,344 | Trimmed |
| 3 | Calamos Wealth Management LLC | $2.8M | 102,338 | Trimmed |
| 4 | OLD MISSION CAPITAL LLC | $770,462 | 28,562 | Added |
| 5 | Camelot Portfolios, LLC | $680,825 | 25,239 | Trimmed |
| 6 | COMMONWEALTH EQUITY SERVICES, LLC | $552,530 | 20,483 | Hold |
| 7 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $519,136 | 19,245 | New |
| 8 | Blue Water Asset Management | $446,492 | 16,552 | Hold |
| 9 | LeClair Wealth Partners LLC | $446,492 | 16,552 | New |
| 10 | Capital Analysts, LLC | $371,000 | 13,745 | Hold |
| 11 | Grantvest Financial Group LLC | $329,420 | 12,212 | Hold |
| 12 | HARBOUR INVESTMENTS, INC. | $311,724 | 11,556 | Trimmed |
| 13 | Spartan Wealth Advisory Services LLC | $288,876 | 10,709 | New |
| 14 | HOHIMER WEALTH MANAGEMENT, LLC | $239,755 | 8,888 | Hold |
| 15 | Sterling Financial Planning, Inc. | $216,286 | 8,018 | Hold |
| 16 | BURKETT FINANCIAL SERVICES, LLC | $194,220 | 7,200 | Trimmed |
| 17 | Sound Income Strategies, LLC | $43,488 | 1,608 | Hold |
| 18 | CREATIVE FINANCIAL DESIGNS INC /ADV | $8,120 | 301 | Hold |
| 19 | UBS Group AG | $998 | 37 | Trimmed |
| 20 | City Center Advisors, LLC | $0 | 0 | Exited |
| 21 | Pallas Capital Advisors LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31