GRANITESHARES ETF TR 2X LONG MARA is a security (CUSIP 38747R538) tracked across SEC portfolio filings. 11 institutional managers reported $4.6M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| JANE STREET GROUP, LLC | NEW YORK, NY | $3.6M | 127,114 |
| Sara-Bay Financial | SARASOTA, FL | $498K | 6,997 |
| Optiver Holding B.V. | AMSTERDAM, P7 | $202K | 70,408 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $103K | 35,765 |
| CITADEL ADVISORS LLC | MIAMI, FL | $92K | — |
| TWO SIGMA SECURITIES, LLC | New York, NY | $51K | 17,673 |
| XTX Topco Ltd | LONDON, X0 | $38K | 13,139 |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $7K | 2,534 |
| MORGAN STANLEY | NEW YORK, NY | $7K | 2,525 |
| Tower Research Capital LLC (TRC) | NEW YORK, NY | $1K | 451 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | 0 |