| 1 | Abarta Oil & Gas Co., Inc. | Pittsburgh, PA 15238 | Oil & Gas Operator | Dec 2020 |
| 2 | Ardent Resources, Inc. | Upper St Clair, PA 15241-1633 | Oil & Gas Operator | Dec 2018 |
| 3 | Clean Energy Exploration & Production LLC | Norristown, PA 19403 | Gas Operator | Nov 2025 |
| 4 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 5 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 6 | East Resources MGMT LLC | Warrendale, PA 15086-7528 | Oil & Gas Operator | Dec 2010 |
| 7 | East Resources, Inc. | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2021 |
| 8 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Nov 2025 |
| 9 | JKLM Energy LLC | Sewickly, PA 15143 | Gas Operator | Nov 2025 |
| 10 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Nov 2025 |
| 11 | Potter McKean Resources Inc | Shinglehouse, PA 16748-0527 | Gas Operator | Dec 2003 |
| 12 | Potter McKean Resources Of Pa | Shinglehouse, PA 16748-2631 | Gas Operator | Dec 2007 |
| 13 | Repsol Oil & Gas USA, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 14 | Rockdale Marcellus LLC | Canonsburg, PA 15317 | Gas Operator | Apr 2022 |
| 15 | Seneca Resources Co LLC | Cranberry Township, PA 16066 | Oil & Gas Operator | Nov 2025 |
| 16 | STL Resources LLC | Sewickley, PA 15143-8859 | Gas Operator | Nov 2025 |
| 17 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 18 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Nov 2025 |
| 19 | Tenaska Res LLC | Canonsburg, PA 15317 | Gas Operator | May 2020 |
| 20 | Tilden Marcellus LLC | Houston, TX 77024-1358 | Gas Operator | May 2022 |
| 21 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 22 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
| 23 | Vec Energy LLC | Kittanning, PA 16201-5022 | Oil & Gas Operator | Nov 2025 |
| 24 | Victory Energy Corp | Indiana, PA 15701-8944 | Oil & Gas Operator | Dec 2021 |