| 1 | Apollo Resources LLC | Vintondale, PA 15961-0222 | Oil & Gas Operator | Nov 2025 |
| 2 | Ashtola Prod Co | Valley Forge, PA 19482-0858 | Gas Operator | Dec 1986 |
| 3 | Belden & Blake Corporation | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 4 | Berea Oil & Gas Corp | Buffalo, NY 14202 | Oil & Gas Operator | Dec 2002 |
| 5 | BG Production, LLC | Denver, NC 28037-8088 | Oil & Gas Operator | Dec 2021 |
| 6 | Big Dog Energy LLC | Sewickley, PA 15143-8782 | Gas Operator | Nov 2025 |
| 7 | BP Prod North Amer Inc | New Orleans, LA 70150-0879 | Gas Operator | Dec 1981 |
| 8 | Chesapeake Appalachia, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 2025 |
| 9 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 10 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 11 | CNX Gas Company LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Nov 2025 |
| 12 | Columbia Gas Trans LLC | Charleston, WV 25325-1273 | Gas Operator | Dec 1987 |
| 13 | Columbia Natural Res Inc | Charleston, WV 25362-0070 | Gas Operator | Dec 2008 |
| 14 | Columbia Natural Resources, LLC | Charleston, WV 23502 | Oil & Gas Operator | Dec 2021 |
| 15 | Consol Gas Company | Canonsburg, PA 15317 | Oil & Gas Operator | Dec 2021 |
| 16 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Nov 2025 |
| 17 | Cottonwood Opr Corp | Dubois, PA 15801-0403 | Gas Operator | Dec 1989 |
| 18 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 19 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 20 | Eastern Gas Trans & Storage Inc | Bridgeport, WV 26330-6919 | Oil & Gas Operator | Feb 2025 |
| 21 | Enervest Opr LLC | Charleston, WV 25301-1782 | Oil & Gas Operator | Dec 2019 |
| 22 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 23 | Eqt Chap, LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Nov 2025 |
| 24 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Nov 2025 |
| 25 | Exco Resources (Pa), LLC | Dallas, TX 75251-2224 | Oil & Gas Operator | Nov 2025 |
| 26 | Exco Resources Pa Inc | Warrendale, PA 15086-6501 | Oil & Gas Operator | Dec 2011 |
| 27 | Felmont Oil Corporation | Walnut Creek, CA 94596-3568 | Oil & Gas Operator | Feb 1990 |
| 28 | Interstate Gas MKT Inc | Indiana, PA 15701 | Oil & Gas Operator | Dec 2018 |
| 29 | Keystone Resources Inc | Cranberry Township, PA 16066-6446 | Gas Operator | Dec 1992 |
| 30 | Linn Opr Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Dec 2007 |
| 31 | Linn Opr LLC | Indiana, PA 15701-8914 | Gas Operator | Dec 2004 |
| 32 | LPR Energy, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 33 | Manufacturers Light & Heat Co | Pittsburgh, PA 15219 | Gas Operator | Dec 1986 |
| 34 | Oil & Gas MGMT Inc | Mount Pleasant, PA 15666-3304 | Oil & Gas Operator | Dec 2024 |
| 35 | Ows Acquisition Co LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 36 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 37 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | Nov 2025 |
| 38 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 39 | Phillips Exploration Inc | Warrendale, PA 15086 | Oil & Gas Operator | Dec 2012 |
| 40 | Power Gas MKT & Trans Inc | Akron, OH 44311-1062 | Oil & Gas Operator | Dec 2008 |
| 41 | Quaker State Corporation | Houston, TX 77002-2806 | Oil & Gas Operator | Dec 2013 |
| 42 | Samson Res Co | Tulsa, OK 74103-3103 | Gas Operator | Jan 2015 |
| 43 | Somerset Oil & Gas Company | Portland, TX 78374 | Oil & Gas Operator | Dec 2006 |
| 44 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2025 |
| 45 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 46 | West Texas Operating Co LLC D/B/A Xtreme Energy Co | Victoria, TX 77902-2326 | Oil & Gas Operator | Oct 2025 |
| 47 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |