# MARA HOLDINGS INC COM

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.

## Summary

- Issuer: MARA HOLDINGS INC
- Class: COM
- CUSIP: 565788906
- 13F holders: 9
- 13F value: $135.1M
- 13F period: 2026-06-30
- N-PORT fund positions: 0

## Top institutional holders (Form 13F)

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| IMC-Chicago, LLC | CHICAGO, IL | $87.9M | — |
| [SIMPLEX TRADING, LLC](https://search.stillhousedata.com/firm/153585) | CHICAGO, IL | $22.7M | — |
| Optiver Holding B.V. | AMSTERDAM, P7 | $12.9M | — |
| [GROUP ONE TRADING, L.P.](https://search.stillhousedata.com/firm/37484) | 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 | — | — |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/565788906.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.