| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Marion Corporation | Oil & Gas Operator | Jan 2001 | |
| 2 | Marsh Engineering, Inc. | Oil & Gas Operator | Dec 1990 | |
| 3 | Martin Exploration Co. | Oil & Gas Operator | Apr 1986 | |
| 4 | McCarter-Greenbrier-Macdonald | Oil Operator | Sep 1981 | |
| 5 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 6 | Mid Louisiana Gas Company | Oil & Gas Operator | Oct 2002 | |
| 7 | Mobil Oil E & P Southeast Inc | Oil & Gas Operator | Sep 2013 | |
| 8 | Monterey Pipeline Co. | Oil Operator | Aug 1993 | |
| 9 | Mullins & Prichard | Oil & Gas Operator | May 1992 |