15 institutions reported holding $4.8M of CALAMOS ETF TR BITCOIN 80 SER STRUCTURED ALT PROTECTION ETF OCTOBER (CBTO) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.5M), Calamos Advisors LLC ($1.3M), JANE STREET GROUP, LLC ($1.0M), Orion Porfolio Solutions, LLC ($345,352), Calamos Wealth Management LLC ($210,435). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.5M | 77,183 | Added |
| 2 | Calamos Advisors LLC | $1.3M | 66,870 | Added |
| 3 | JANE STREET GROUP, LLC | $1.0M | 50,854 | New |
| 4 | Orion Porfolio Solutions, LLC | $345,352 | 17,535 | Trimmed |
| 5 | Calamos Wealth Management LLC | $210,435 | 10,682 | Trimmed |
| 6 | Ankerstar Wealth, LLC | $169,298 | 8,596 | Trimmed |
| 7 | HARBOUR INVESTMENTS, INC. | $84,432 | 4,287 | Hold |
| 8 | IFP Advisors, Inc | $83,704 | 4,250 | Trimmed |
| 9 | Noble Wealth Management PBC | $74,841 | 3,800 | Hold |
| 10 | UBS Group AG | $22,157 | 1,125 | New |
| 11 | VIMA LLC | $16,386 | 832 | New |
| 12 | Aptus Capital Advisors, LLC | $3,151 | 160 | Hold |
| 13 | Sound Income Strategies, LLC | $0 | 0 | Exited |
| 14 | GUARDIAN WEALTH ADVISORS, LLC / NC | $0 | 0 | Exited |
| 15 | Oasis Advisors, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30