7 institutions reported holding $1.6M of ETF OPPORTUNITIES TRUST (RBLU) in SEC 13F filings for 2026-06-30. Largest institutional holders: Optiver Holding B.V. ($647,547), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($476,283), CITADEL ADVISORS LLC ($450,915), SBI Securities Co., Ltd. ($2,622), SIMPLEX TRADING, LLC ($1,498). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Optiver Holding B.V. | $647,547 | 72,595 | Added |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $476,283 | 53,395 | New |
| 3 | CITADEL ADVISORS LLC | $450,915 | 50,551 | Added |
| 4 | SBI Securities Co., Ltd. | $2,622 | 294 | Added |
| 5 | SIMPLEX TRADING, LLC | $1,498 | 168 | Added |
| 6 | Tower Research Capital LLC (TRC) | $312 | 35 | Added |
| 7 | CITIGROUP INC | $18 | 2 | New |
Source: SEC Form 13F filings · as of 2026-06-30