| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Washington Energy Co LLC | Canonsburg, PA 15317-0400 | Oil & Gas Operator | Dec 2024 |
| 2 | Westinghouse Elec Co LLC | Gas Operator | Dec 2025 | |
| 3 | WGM Gas Co Inc | Oil & Gas Operator | Dec 2025 | |
| 4 | WHC Oper LLC | Gas Operator | Dec 2025 | |
| 5 | Wilkes Energy Inc | Akron, OH 44308 | Oil & Gas Operator | Dec 2022 |
| 6 | William McIntire Coal Oil & Gas | Shelocta, PA 15774-0171 | Oil & Gas Operator | May 2022 |
| 7 | Windfall Oil & Gas Inc | Falls Creek, PA 15840-2617 | Gas Operator | Dec 2024 |
| 8 | Winfall Energy Inc N V | Vandergrift, PA 15690-2001 | Oil & Gas Operator | Dec 2025 |
| 9 | Wood Drilling LLC | Kittanning, PA 16201 | Gas Operator | Dec 2025 |
| 10 | Wood William C | Kittanning, PA 16201-4328 | Oil & Gas Operator | Dec 2018 |