| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | M3 Helium Corp | Gas Operator | Dec 2024 | |
| 2 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Feb 2025 |
| 3 | Marathon Oil Com | Oil & Gas Operator | Dec 1996 | |
| 4 | Mariah Operating Company, LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2009 |
| 5 | Max Papay LLC | Meade, KS 67864 | Oil & Gas Operator | Jun 2018 |
| 6 | Mayhew Properties | Gas Operator | Dec 2024 | |
| 7 | McCoy Petroleum | Oil & Gas Operator | Aug 1996 | |
| 8 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Mar 2025 |
| 9 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 10 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 11 | Mesa Operating L | Oil & Gas Operator | Dec 1996 | |
| 12 | Mesa Petroleum C | Oil & Gas Operator | Dec 1986 | |
| 13 | Mobil Oil Corpor | Oil & Gas Operator | Dec 1996 |