| 1 | M4 Energy, LLC | Watsontown, PA 17777-1133 | Oil & Gas Operator | Dec 2024 |
| 2 | May Gas, Inc. | | Oil & Gas Operator | Dec 2008 |
| 3 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 4 | Miller, Allerton | | Oil & Gas Operator | Dec 1997 |
| 5 | Mineral Resource Management, L.L.C. | Jane Lew, WV 26378 | Oil & Gas Operator | Dec 2021 |
| 6 | MLX Operating, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2021 |
| 7 | Moody Oil & Gas Co. | Bridgeport, WV 26330-1051 | Oil & Gas Operator | Dec 2004 |
| 8 | Mossor, L. E. | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2002 |
| 9 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 10 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 11 | Murvin & Meier Oil Co. | | Oil & Gas Operator | Dec 2020 |
| 12 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |