| 1 | Airdale Oil & Gas LLC | Oil City, PA 16301-3771 | Oil & Gas Operator | Dec 2025 |
| 2 | Chesapeake Appalachia, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 3 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 4 | Farrington & Hepler Gas & Oil Inc | Seneca, PA 16346-0546 | Oil & Gas Operator | Dec 2024 |
| 5 | Fortress Energy Corp | Pittsburgh, PA 15217-4207 | Oil & Gas Operator | Dec 2023 |
| 6 | Geopetro LLC | Worthington, OH 43085-2316 | Oil & Gas Operator | Dec 2025 |
| 7 | Hundred Foot Production LLC | Cranberry, PA 16319 | Oil & Gas Operator | Dec 2017 |
| 8 | Pennenergy Resources LLC | Pittsburgh, PA 15275-1063 | Oil & Gas Operator | Dec 2025 |
| 9 | Pin Oak Energy Partners LLC | Akron, OH 44311 | Oil & Gas Operator | Dec 2025 |
| 10 | Range Resources Appalachia LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2025 |
| 11 | RJ Schreiner SR | Freedom, PA 15042-9353 | Oil & Gas Operator | Dec 2015 |
| 12 | Tevebaugh MGMT Co | Baden, PA 15005-0123 | Oil & Gas Operator | Dec 2002 |
| 13 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Sep 2025 |