| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 2 | Marsha Azar | Oil & Gas Operator | Jan 2017 | |
| 3 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 4 | Mesa Petroleum Co. | Oil & Gas Operator | Aug 1985 | |
| 5 | Missouri Basin Well Service, Inc. | Belfield, ND 58622 | Oil & Gas Operator | Jan 2018 |
| 6 | Missouri River Royalty Corporation | Bismarck, ND 58504 | Oil & Gas Operator | Jan 2025 |
| 7 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 8 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | Jan 2025 |