8 institutions reported holding $3.3M of DIREXION SHARES ETF TRUST (MEXX) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.8M), JANE STREET GROUP, LLC ($1.2M), CITADEL ADVISORS LLC ($309,885), SIMPLEX TRADING, LLC ($2,416), MORGAN STANLEY ($40). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.8M | 63,739 | Added |
| 2 | JANE STREET GROUP, LLC | $1.2M | 40,752 | Added |
| 3 | CITADEL ADVISORS LLC | $309,885 | 10,900 | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $2,416 | 85 | New |
| 5 | MORGAN STANLEY | $40 | 1 | Trimmed |
| 6 | UBS Group AG | $28 | 1 | Trimmed |
| 7 | IFP Advisors, Inc | $0 | 0 | Exited |
| 8 | Hamrick Investment Counsel, llc | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30