13 institutions reported holding $1.9M of PROSHARES (SLON) in SEC 13F filings for 2026-06-30. Largest institutional holders: FLOW TRADERS U.S. LLC ($1.3M), Belvedere Trading LLC ($381,575), Avidian Wealth Enterprises, LLC ($182,380), SIMPLEX TRADING, LLC ($41,629), Tower Research Capital LLC (TRC) ($679). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | FLOW TRADERS U.S. LLC | $1.3M | 73,300 | Trimmed |
| 2 | Belvedere Trading LLC | $381,575 | 21,366 | New |
| 3 | Avidian Wealth Enterprises, LLC | $182,380 | 10,212 | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $41,629 | 2,331 | Added |
| 5 | Tower Research Capital LLC (TRC) | $679 | 38 | Trimmed |
| 6 | HOLLENCREST CAPITAL MANAGEMENT | $393 | 22 | Trimmed |
| 7 | GROUP ONE TRADING LLC | $393 | 22 | Trimmed |
| 8 | CITADEL ADVISORS LLC | $0 | 0 | Exited |
| 9 | JANE STREET GROUP, LLC | $0 | 0 | Exited |
| 10 | UBS Group AG | $0 | 0 | Exited |
| 11 | OSAIC HOLDINGS, INC. | $0 | 0 | Exited |
| 12 | Ankerstar Wealth, LLC | $0 | 0 | Exited |
| 13 | Miller Capital Partners, Inc. | $0 | 0 | Exited |
来源：SEC 13F 申报文件 · 截至 2026-06-30