| 1 | Allegheny Enterprises Inc | Corsica, PA 15829-3833 | Oil & Gas Operator | Dec 2018 |
| 2 | Amer Exploration Co | Plymouth Meeting, PA 19462-1640 | Oil & Gas Operator | Dec 2008 |
| 3 | Capital Oil & Gas Inc | Austintown, OH 44515-3033 | Oil & Gas Operator | Dec 2023 |
| 4 | Castle Gas Company Inc | Pittsburgh, PA 15236-2466 | Oil & Gas Operator | Dec 2007 |
| 5 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Sep 2024 |
| 6 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 7 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Sep 2024 |
| 8 | De LTD Family Partnership | Punxsutawney, PA 15767-2646 | Oil & Gas Operator | Dec 2022 |
| 9 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2022 |
| 10 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2024 |
| 11 | Eastern Gas Trans & Storage Inc | Bridgeport, WV 26330-6919 | Oil & Gas Operator | Sep 2024 |
| 12 | Empire Exploration Inc | Wichita, KS 67202 | Oil & Gas Operator | Jul 1997 |
| 13 | Endeavour Operating Corp | Denver, CO 80202-2000 | Oil & Gas Operator | Sep 2015 |
| 14 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Sep 2024 |
| 15 | Equitable Prod Eastern States Exploration Inc | Snow Shoe, PA 16874-0178 | Gas Operator | Dec 2001 |
| 16 | Fairman Drilling Co | Du Bois, PA 15801-0288 | Oil & Gas Operator | Dec 2002 |
| 17 | Fairman Oil & Gas Co Inc | Oil City, PA 16301 | Oil & Gas Operator | Dec 1991 |
| 18 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Dec 2024 |
| 19 | Lee E & M Lee Minter | New Kensington, PA 15068-1440 | Gas Operator | Dec 2003 |
| 20 | M & M Royalty LTD | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 21 | Natl Fuel Gas Supply Corp | Williamsville, NY 14221-5887 | Oil & Gas Operator | Dec 2009 |
| 22 | NCL Natural Resources LLC | Spring, TX 77381-5261-5261 | Oil & Gas Operator | Dec 2017 |
| 23 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Oct 2024 |
| 24 | Seneca Resources Co LLC | Cranberry Township, PA 16066 | Oil & Gas Operator | Sep 2024 |