6 institutions reported holding $1.2M of ETF OPPORTUNITIES TRUST (MSFX) in SEC 13F filings for 2026-06-30. Largest institutional holders: Optiver Holding B.V. ($572,121), CITADEL ADVISORS LLC ($366,163), IMC-Chicago, LLC ($279,845), GROUP ONE TRADING LLC ($8,796), SIMPLEX TRADING, LLC ($4,324). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $572,121 | 39,026 | Added |
| 2 | CITADEL ADVISORS LLC | $366,163 | 24,977 | Trimmed |
| 3 | IMC-Chicago, LLC | $279,845 | 19,089 | New |
| 4 | GROUP ONE TRADING LLC | $8,796 | 600 | New |
| 5 | SIMPLEX TRADING, LLC | $4,324 | 295 | Trimmed |
| 6 | CREATIVE FINANCIAL DESIGNS INC /ADV | $3,858 | 263 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30