| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 2 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2025 |
| 3 | Markus Production | Littleton, CO 80123 | Oil & Gas Operator | Jun 2025 |
| 4 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 5 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2025 |
| 6 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |