| 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 | Dec 2025 |
| 4 | McDonald Marketing & Operg. Co | Gas Operator | May 1991 | |
| 5 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 6 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Feb 2026 |
| 7 | Michigan-Wisconsin Pipe Line Co | Oil & Gas Operator | Dec 1983 | |
| 8 | Mike Revere | Oil & Gas Operator | Jul 1991 | |
| 9 | Milton Oil & Gas Management | Oil & Gas Operator | Jul 1988 | |
| 10 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 11 | Moro Bay Oil Company, Inc. | Oil Operator | Jan 1997 | |
| 12 | Murphy - Sun | Oil & Gas Operator | May 1989 |