MARA HOLDINGS INC COM is a security (CUSIP 565788956) tracked across SEC portfolio filings. 11 institutional managers reported $137.1M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| IMC-Chicago, LLC | CHICAGO, IL | $72.7M | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $35.5M | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $9.0M | — |
| Marathon Trading Investment Management LLC | RADNOR, PA | $6.3M | — |
| CIBC WORLD MARKETS CORP | NEW YORK, NY | $4.9M | — |
| CIBC Bancorp USA Inc. | CHICAGO, IL | $4.0M | — |
| Optiver Holding B.V. | AMSTERDAM, P7 | $3.0M | — |
| JPMORGAN CHASE & CO | NEW YORK, NY | $1.8M | — |
| HRT FINANCIAL LP | NEW YORK, NY | $3K | 379,600 |
| SG Americas Securities, LLC | NEW YORK, NY | $794 | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |