8 institutions reported holding $3.9M of ROUNDHILL ETF TRUST (HOOW) in SEC 13F filings for 2026-06-30. Largest institutional holders: CITADEL ADVISORS LLC ($1.7M), CENTAURUS FINANCIAL, INC. ($1.1M), StoneX Group Inc. ($317,217), OLD MISSION CAPITAL LLC ($259,565), GROUP ONE TRADING LLC ($248,848). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | $1.7M | 61,100 | Trimmed |
| 2 | CENTAURUS FINANCIAL, INC. | $1.1M | 38,597 | Added |
| 3 | StoneX Group Inc. | $317,217 | 11,109 | New |
| 4 | OLD MISSION CAPITAL LLC | $259,565 | 9,130 | New |
| 5 | GROUP ONE TRADING LLC | $248,848 | 8,753 | Trimmed |
| 6 | SIMPLEX TRADING, LLC | $123,443 | 4,342 | Trimmed |
| 7 | BRYN MAWR TRUST Co | $69,881 | 2,458 | Added |
| 8 | Farther Finance Advisors, LLC | $4,415 | 155 | Added |
Source: SEC Form 13F filings · as of 2026-06-30