| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Malmac Energy Corp. | Oil & Gas Operator | Jul 1987 | |
| 2 | Marjo, Inc. | Oil & Gas Operator | Sep 1991 | |
| 3 | Mark L Shidler, Inc. | Houston, TX 77055 | Oil & Gas Operator | Jan 2024 |
| 4 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 5 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Apr 2024 |
| 6 | Michigan-Wisconsin Pipe Line Co | Oil & Gas Operator | Dec 1983 | |
| 7 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 8 | Moro Bay Oil Company, Inc. | Oil Operator | Jan 1997 | |
| 9 | Murphy - Sun | Oil & Gas Operator | May 1989 |