12 institutions reported holding $2.2M of PROSHARES TR (SRS) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($1.2M), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($677,198), CITADEL ADVISORS LLC ($267,064), Tower Research Capital LLC (TRC) ($53,747), MORGAN STANLEY ($110). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.2M | 24,782 | Added |
| 2 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $677,198 | 14,200 | Trimmed |
| 3 | CITADEL ADVISORS LLC | $267,064 | 5,600 | Trimmed |
| 4 | Tower Research Capital LLC (TRC) | $53,747 | 1,127 | Added |
| 5 | MORGAN STANLEY | $110 | 2 | Hold |
| 6 | BLAIR WILLIAM & CO/IL | $48 | 1 | Hold |
| 7 | SIMPLEX TRADING, LLC | $0 | 0 | Exited |
| 8 | Virtu Financial LLC | $0 | 0 | Exited |
| 9 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
| 10 | GROUP ONE TRADING LLC | $0 | 0 | Exited |
| 11 | SJBENEN ADVISORY, LLC | $0 | 0 | Exited |
| 12 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31