8 institutions reported holding $1.3M of REX ETF TR (TSII) in SEC 13F filings for 2026-03-31. Largest institutional holders: OLD MISSION CAPITAL LLC ($361,322), JANE STREET GROUP, LLC ($324,976), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($314,669), CITADEL ADVISORS LLC ($215,214), INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC ($67,915). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | OLD MISSION CAPITAL LLC | $361,322 | 19,037 | New |
| 2 | JANE STREET GROUP, LLC | $324,976 | 17,122 | New |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $314,669 | 16,579 | New |
| 4 | CITADEL ADVISORS LLC | $215,214 | 11,339 | New |
| 5 | INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | $67,915 | 3,490 | Added |
| 6 | Golden State Equity Partners | $949 | 50 | New |
| 7 | UBS Group AG | $95 | 5 | New |
| 8 | Falcon Wealth Planning | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31