18 institutions reported holding $61.9M of PROSHARES TR II (ZSL) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($28.0M), CITADEL ADVISORS LLC ($13.2M), JANE STREET GROUP, LLC ($7.3M), Quadrature Capital Ltd ($2.3M), FLOW TRADERS U.S. LLC ($2.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $28.0M | 908,398 | Added |
| 2 | CITADEL ADVISORS LLC | $13.2M | 428,730 | Trimmed |
| 3 | JANE STREET GROUP, LLC | $7.3M | 237,999 | Trimmed |
| 4 | Quadrature Capital Ltd | $2.3M | 75,533 | New |
| 5 | FLOW TRADERS U.S. LLC | $2.2M | 72,914 | Trimmed |
| 6 | IMC-Chicago, LLC | $1.8M | 57,762 | Added |
| 7 | CANTOR FITZGERALD, L. P. | $1.8M | 57,300 | Trimmed |
| 8 | BNP PARIBAS FINANCIAL MARKETS | $1.3M | 42,973 | Added |
| 9 | MOULTON WEALTH MANAGEMENT, INC | $1.3M | 42,657 | Trimmed |
| 10 | StoneX Group Inc. | $949,513 | 40,490 | Added |
| 11 | MORGAN STANLEY | $583,409 | 18,948 | Added |
| 12 | SIMPLEX TRADING, LLC | $488,914 | 15,879 | Added |
| 13 | HRT FINANCIAL LP | $478,000 | 15,549 | New |
| 14 | THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | $134,212 | 4,359 | Hold |
| 15 | Parallel Advisors, LLC | $15,395 | 500 | Hold |
| 16 | XTX Topco Ltd | $0 | 0 | Exited |
| 17 | JPMORGAN CHASE & CO | $0 | 0 | Exited |
| 18 | FNY Investment Advisers, LLC | $0 | 5 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30