MARA HOLDINGS INC COM is a security (CUSIP 565788906) tracked across SEC portfolio filings. 9 institutional managers reported $135.1M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| IMC-Chicago, LLC | CHICAGO, IL | $87.9M | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $22.7M | — |
| Optiver Holding B.V. | AMSTERDAM, P7 | $12.9M | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $11.1M | — |
| CIBC Bancorp USA Inc. | CHICAGO, IL | $408K | — |
| Marathon Trading Investment Management LLC | RADNOR, PA | $61K | — |
| CMT Capital Markets Trading GmbH | CHICAGO, IL | $204 | — |
| SG Americas Securities, LLC | NEW YORK, NY | $13 | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |