10 institutions reported holding $17.7M of ROUNDHILL ETF TRUST (GOOW) in SEC 13F filings for 2026-06-30. Largest institutional holders: EXCHANGE TRADED CONCEPTS, LLC ($15.1M), Belvedere Trading LLC ($2.0M), CITADEL ADVISORS LLC ($603,331), GROUP ONE TRADING LLC ($47,995), SIMPLEX TRADING, LLC ($31,318). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | EXCHANGE TRADED CONCEPTS, LLC | $15.1M | 222,208 | Trimmed |
| 2 | Belvedere Trading LLC | $2.0M | 29,260 | New |
| 3 | CITADEL ADVISORS LLC | $603,331 | 8,900 | New |
| 4 | GROUP ONE TRADING LLC | $47,995 | 708 | Trimmed |
| 5 | SIMPLEX TRADING, LLC | $31,318 | 462 | Added |
| 6 | TD Waterhouse Canada Inc. | $8,474 | 125 | Hold |
| 7 | OLD MISSION CAPITAL LLC | $0 | 0 | Exited |
| 8 | HRT FINANCIAL LP | $0 | 0 | Exited |
| 9 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
| 10 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30