7 institutions reported holding $3.1M of CALAMOS ETF TR (CBOA) in SEC 13F filings for 2026-03-31. Largest institutional holders: JANE STREET GROUP, LLC ($1.3M), OLD MISSION CAPITAL LLC ($1.1M), Calamos Advisors LLC ($565,746), Legacy Wealth Managment, LLC/ID ($76,543), Ankerstar Wealth, LLC ($5,912). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $1.3M | 55,495 | Added |
| 2 | OLD MISSION CAPITAL LLC | $1.1M | 45,928 | Added |
| 3 | Calamos Advisors LLC | $565,746 | 23,349 | Added |
| 4 | Legacy Wealth Managment, LLC/ID | $76,543 | 3,159 | Trimmed |
| 5 | Ankerstar Wealth, LLC | $5,912 | 244 | Hold |
| 6 | HighTower Advisors, LLC | $0 | 0 | Exited |
| 7 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31