| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2025 |
| 2 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 3 | Marine Cont. & Supply Inc. | Oil & Gas Operator | Nov 1985 | |
| 4 | Marion Corporation | Oil & Gas Operator | Jan 2001 | |
| 5 | Martin Exploration Co. | Oil & Gas Operator | Apr 1986 | |
| 6 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 7 | Mongrue Oil Company, Inc. | Oil & Gas Operator | Oct 1999 | |
| 8 | Mongrue, Roland, Inc | Oil & Gas Operator | Mar 1979 | |
| 9 | Monsanto Company | Indianapolis, IN 46280 | Oil & Gas Operator | Jan 2005 |
| 10 | MVP Production Inc. | Oil & Gas Operator | Apr 2005 |