5 institutions reported holding $1.9M of ROUNDHILL ETF TRUST (UX) in SEC 13F filings for 2026-03-31. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($954,664), CITADEL ADVISORS LLC ($470,949), JANE STREET GROUP, LLC ($353,579), SIMPLEX TRADING, LLC ($111,223), Main Street Group, LTD ($3,058). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $954,664 | 31,218 | Added |
| 2 | CITADEL ADVISORS LLC | $470,949 | 15,400 | New |
| 3 | JANE STREET GROUP, LLC | $353,579 | 11,562 | New |
| 4 | SIMPLEX TRADING, LLC | $111,223 | 3,637 | Added |
| 5 | Main Street Group, LTD | $3,058 | 100 | New |
Source: SEC Form 13F filings · as of 2026-03-31