| 1 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 2 | Apollo Resources LLC | Vintondale, PA 15961-0222 | Oil & Gas Operator | Jan 2025 |
| 3 | Capital Oil & Gas Inc | Austintown, OH 44515-3033 | Oil & Gas Operator | Dec 2024 |
| 4 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Jan 2025 |
| 5 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Jan 2025 |
| 6 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Apr 2025 |
| 7 | Energy Corp Of Amer | Charleston, WV 25311-1264 | Oil & Gas Operator | Mar 2018 |
| 8 | Enervest Opr LLC | Charleston, WV 25301-1782 | Oil & Gas Operator | Dec 2019 |
| 9 | Eqt Aro LLC | Canonsburg, PA 15317-5851 | Gas Operator | Jan 2025 |
| 10 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Jan 2025 |
| 11 | Equitable Prod Eastern States Exploration Inc | Snow Shoe, PA 16874-0178 | Gas Operator | Dec 2001 |
| 12 | Equitrans Inc | Cannonsburg, PA 15317 | Oil & Gas Operator | Dec 2018 |
| 13 | Exco Resources (Pa), LLC | Dallas, TX 75251-2224 | Oil & Gas Operator | Jan 2025 |
| 14 | Exco Resources Pa Inc | Warrendale, PA 15086-6501 | Oil & Gas Operator | Dec 2011 |
| 15 | Frontier Natural Resources | Bellefonte, PA 16823 | Gas Operator | Jan 2025 |
| 16 | Great Plains Oper LLC Dba Great MTN Oper | Grapevine, TX 76051-5477 | Gas Operator | Nov 2015 |
| 17 | Linn Opr Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Dec 2007 |
| 18 | Linn Opr LLC | Indiana, PA 15701-8914 | Gas Operator | Dec 2004 |
| 19 | MTN V Oil & Gas Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Dec 2024 |
| 20 | NCL Natural Resources LLC | Spring, TX 77381-5261-5261 | Oil & Gas Operator | Dec 2017 |
| 21 | Range Resources Appalachia LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Jan 2025 |
| 22 | STL Resources LLC | Sewickley, PA 15143-8859 | Gas Operator | Jan 2025 |
| 23 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 24 | Texas Keystone Inc | Oakmont, PA 15139-2072 | Oil & Gas Operator | Nov 2017 |
| 25 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |