| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 2 | McLain J. Forman | Oil & Gas Operator | Mar 1988 | |
| 3 | Mid-America Resources Corporation | Oil Operator | Jan 2019 | |
| 4 | Mid-America Resources, Inc. | Oil & Gas Operator | Feb 2008 | |
| 5 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 6 | Midstates Petroleum Corp. | Oil & Gas Operator | Dec 2008 | |
| 7 | Mongrue, Roland, Inc | Oil & Gas Operator | Mar 1979 | |
| 8 | Monterey Pipeline Co. | Oil Operator | Aug 1993 |