| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Mammoth Service Group, LLC | Oil & Gas Operator | Aug 2025 | |
| 2 | Manchester Oil Co | Oil Operator | Jan 2000 | |
| 3 | Marlin Exploration, LLC | Oil & Gas Operator | Sep 2025 | |
| 4 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 5 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Dec 2025 |
| 6 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 7 | Meng Oper & Expl Co | Oil & Gas Operator | Dec 1989 | |
| 8 | Meyer, Ruskin H. Et Al | Oil Operator | Oct 1980 | |
| 9 | Midroc Oil Company Et Al | Oil Operator | Nov 1984 | |
| 10 | Midroc Operating Company | Oil & Gas Operator | Apr 2013 | |
| 11 | Miss-Lou Oil Producers Inc | Oil & Gas Operator | Dec 1998 | |
| 12 | Morrow Oil & Gas Co. | Terry, MS 39170 | Oil & Gas Operator | Sep 2025 |
| 13 | MT. Crescent Operating Company, LLC | Oil & Gas Operator | Sep 2025 |