| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | M L Mayfield Petroleum Corp. | Oil & Gas Operator | Aug 1991 | |
| 2 | M. L. Mayfield | Oil & Gas Operator | Oct 1990 | |
| 3 | M. L. Mayfield Co. | Oil & Gas Operator | Aug 1991 | |
| 4 | Magnolia Production Company LLC | Oil & Gas Operator | Nov 2024 | |
| 5 | Manursing Island Prod. Corp. | Oil & Gas Operator | Sep 2002 | |
| 6 | McDaniel Petroleum Company, Inc. | Oil Operator | Jun 2020 | |
| 7 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Oct 2025 |
| 8 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 9 | Midstates Petroleum Corp. | Oil & Gas Operator | Dec 2008 | |
| 10 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |