| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | M E III Corporation | Oil & Gas Operator | Apr 2022 | |
| 2 | Machii-Ross Petroleum Co | Oil & Gas Operator | Apr 2014 | |
| 3 | Magpie Operating, Inc | Oil & Gas Operator | Sep 2025 | |
| 4 | Markus Production, Inc | Oil & Gas Operator | Mar 2021 | |
| 5 | Matrix Energy LLC | Oil & Gas Operator | Apr 2013 | |
| 6 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Oct 2025 |
| 7 | MDS Energy Development LLC | Oil & Gas Operator | Oct 2025 | |
| 8 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 9 | Monago Operating Inc | Oil & Gas Operator | Apr 2007 | |
| 10 | Monahan* Rex Family Trust | Oil & Gas Operator | May 2007 |