8 institutions reported holding $2.8M of CALAMOS ETF TR (CBOO) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($802,537), JANE STREET GROUP, LLC ($658,120), Calamos Advisors LLC ($584,674), Rooted Wealth Advisors, Inc. ($327,897), HARBOUR INVESTMENTS, INC. ($162,712). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $802,537 | 32,770 | New |
| 2 | JANE STREET GROUP, LLC | $658,120 | 26,873 | Added |
| 3 | Calamos Advisors LLC | $584,674 | 23,874 | Trimmed |
| 4 | Rooted Wealth Advisors, Inc. | $327,897 | 13,389 | Hold |
| 5 | HARBOUR INVESTMENTS, INC. | $162,712 | 6,644 | Hold |
| 6 | Ankerstar Wealth, LLC | $151,716 | 6,195 | Trimmed |
| 7 | UBS Group AG | $94,850 | 3,873 | Added |
| 8 | BURKETT FINANCIAL SERVICES, LLC | $23,706 | 968 | Added |
Source: SEC Form 13F filings · as of 2026-06-30