6 institutions reported holding $934,683 of ETF OPPORTUNITIES TRUST (MSFX) in SEC 13F filings for 2026-03-31. Largest institutional holders: CITADEL ADVISORS LLC ($818,552), Optiver Holding B.V. ($101,249), SIMPLEX TRADING, LLC ($10,874), CREATIVE FINANCIAL DESIGNS INC /ADV ($4,008), GTS SECURITIES LLC ($0). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | $818,552 | 53,746 | New |
| 2 | Optiver Holding B.V. | $101,249 | 6,648 | Added |
| 3 | SIMPLEX TRADING, LLC | $10,874 | 714 | New |
| 4 | CREATIVE FINANCIAL DESIGNS INC /ADV | $4,008 | 263 | Hold |
| 5 | GTS SECURITIES LLC | $0 | 0 | Exited |
| 6 | Belvedere Trading LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31