| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 2 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 3 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 4 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 5 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 6 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 7 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |