12 institutions reported holding $3.4M of PROSHARES TR (PST) in SEC 13F filings for 2026-03-31. Largest institutional holders: CITADEL ADVISORS LLC ($829,049), JANE STREET GROUP, LLC ($682,976), SUSQUEHANNA INTERNATIONAL GROUP, LLP ($654,144), Royal Bank of Canada ($547,000), CUMBERLAND ADVISORS INC ($545,158). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | CITADEL ADVISORS LLC | $829,049 | 36,863 | Added |
| 2 | JANE STREET GROUP, LLC | $682,976 | 30,368 | New |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $654,144 | 29,086 | Trimmed |
| 4 | Royal Bank of Canada | $547,000 | 24,320 | Added |
| 5 | CUMBERLAND ADVISORS INC | $545,158 | 24,240 | Hold |
| 6 | SIMPLEX TRADING, LLC | $168,202 | 7,479 | New |
| 7 | GROUP ONE TRADING LLC | $2,249 | 100 | Hold |
| 8 | Main Street Group, LTD | $495 | 22 | New |
| 9 | MORGAN STANLEY | $43 | 1 | Trimmed |
| 10 | OSAIC HOLDINGS, INC. | $0 | 0 | Exited |
| 11 | Qube Research & Technologies Ltd | $0 | 0 | Exited |
| 12 | UBS Group AG | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31