| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Maple Grove Enterprises Inc | Oil & Gas Operator | Dec 2025 | |
| 2 | Maxwell Bros | Oil & Gas Operator | Dec 2025 | |
| 3 | Mays Coal Co | Gas Operator | Dec 2003 | |
| 4 | Mays Gas & Coal Co | Clarion, PA 16214-0447 | Oil & Gas Operator | Dec 2025 |
| 5 | McCall Carl E | Fairmount City, PA 16224 | Oil & Gas Operator | Dec 2025 |
| 6 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Jun 2026 |
| 7 | MDS Energy Dev LLC | Kittanning, PA 16201-4403 | Oil & Gas Operator | Jun 2026 |
| 8 | MDS Energy LTD | Kittanning, PA 16201-4403 | Gas Operator | Feb 2015 |
| 9 | MTN V Oil & Gas Inc | Oil & Gas Operator | Jun 2026 | |
| 10 | Murphy Prod Inc | Vanderbilt, PA 15486-1001 | Oil & Gas Operator | Dec 2025 |