8 institutions reported holding $2.8M of PROSHARES TR (ION) in SEC 13F filings for 2026-03-31. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.3M), Moran Wealth Management, LLC ($999,357), JANE STREET GROUP, LLC ($247,364), Kovack Advisors, Inc. ($246,335), UBS Group AG ($17,535). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.3M | 23,057 | Added |
| 2 | Moran Wealth Management, LLC | $999,357 | 17,667 | New |
| 3 | JANE STREET GROUP, LLC | $247,364 | 4,373 | Trimmed |
| 4 | Kovack Advisors, Inc. | $246,335 | 4,356 | New |
| 5 | UBS Group AG | $17,535 | 310 | New |
| 6 | Clearstead Advisors, LLC | $2,829 | 50 | New |
| 7 | OSAIC HOLDINGS, INC. | $1,810 | 32 | Trimmed |
| 8 | MORGAN STANLEY | $80 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31