21 institutions reported holding $32.6M of ETF OPPORTUNITIES TRUST (ROBN) in SEC 13F filings for 2026-03-31. Largest institutional holders: JANE STREET GROUP, LLC ($14.8M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($11.5M), CITADEL ADVISORS LLC ($2.9M), UBS Group AG ($2.0M), Belvedere Trading LLC ($423,852). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $14.8M | 863,000 | Added |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $11.5M | 670,352 | Added |
| 3 | CITADEL ADVISORS LLC | $2.9M | 168,000 | Added |
| 4 | UBS Group AG | $2.0M | 114,454 | Added |
| 5 | Belvedere Trading LLC | $423,852 | 24,700 | Added |
| 6 | RENAISSANCE TECHNOLOGIES LLC | $327,756 | 19,100 | New |
| 7 | SBI Securities Co., Ltd. | $247,825 | 14,442 | Added |
| 8 | StoneX Group Inc. | $186,666 | 10,878 | New |
| 9 | SIMPLEX TRADING, LLC | $124,152 | 7,235 | Added |
| 10 | Optiver Holding B.V. | $47,842 | 2,788 | Trimmed |
| 11 | Tower Research Capital LLC (TRC) | $23,612 | 1,376 | Added |
| 12 | OSAIC HOLDINGS, INC. | $12,166 | 709 | Hold |
| 13 | PNC Financial Services Group, Inc. | $4,719 | 275 | Hold |
| 14 | Ewing Morris & Co. Investment Partners Ltd. | $0 | 0 | Exited |
| 15 | IMC-Chicago, LLC | $0 | 0 | Exited |
| 16 | Jump Financial, LLC | $0 | 0 | Exited |
| 17 | Abound Wealth Management | $0 | 0 | Exited |
| 18 | HOLLENCREST CAPITAL MANAGEMENT | $0 | 0 | Exited |
| 19 | CITIGROUP INC | $0 | 0 | Exited |
| 20 | MORGAN STANLEY | $0 | 0 | Exited |
| 21 | GROUP ONE TRADING LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31