| 1 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2023 |
| 2 | T.O.F., Inc. | | Oil & Gas Operator | Dec 2002 |
| 3 | Taines, Michael Enterprises | | Oil & Gas Operator | Dec 2021 |
| 4 | Tally Ho Oil & Gas Co | Sunman, IN 47041 | Oil & Gas Operator | Dec 2021 |
| 5 | Tapo Energy, LLC | West Union, WV 26456 | Oil & Gas Operator | Dec 2021 |
| 6 | Targa Development, Inc. | Clarksburg, WV 26301-0000 | Oil & Gas Operator | Dec 2021 |
| 7 | Tate Gas Company | Glenville, WV 26351-0000 | Oil & Gas Operator | Dec 2021 |
| 8 | Taylor, W H | | Gas Operator | Dec 2004 |
| 9 | Teavee Oil & Gas, Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 10 | Tedik Limited Partnership | Williamson, WV 25661-0000 | Gas Operator | Dec 2021 |
| 11 | Ten A Coal Company | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2020 |
| 12 | Tender Equity Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 2007 |
| 13 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Nov 2024 |
| 14 | Tenmile Land Limited Liability Company | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2021 |
| 15 | Term Energy Corp. | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2021 |
| 16 | Texas Keystone Inc | Oakmont, PA 15139-2072 | Oil & Gas Operator | Nov 2017 |
| 17 | The Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 18 | Thomas Oil Company | | Oil & Gas Operator | Dec 2008 |
| 19 | Tiger Oil, Inc. | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2007 |
| 20 | TNG, Inc. | | Oil & Gas Operator | Dec 1996 |
| 21 | Toney Branch Gas Company | Huntington, WV 25702-0086 | Gas Operator | Dec 2021 |
| 22 | Tower Drilling Corporation | | Oil & Gas Operator | Dec 2021 |
| 23 | Trans Energy, Inc. | St. Marys, WV 26170 | Oil & Gas Operator | Dec 2017 |
| 24 | Tri-County Oil & Gas, Inc. | Fairmont, WV 26555-0000 | Oil & Gas Operator | Dec 2019 |
| 25 | Tri-Crude Oil & Gas | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2021 |
| 26 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Sep 2024 |
| 27 | Triad Hunter, LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2021 |
| 28 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 29 | Tribune Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 30 | Trio Oil And Gas Company | Salem, WV 26426 | Oil & Gas Operator | Nov 2021 |
| 31 | Trio Petroleum Corp. | Glenville, WV 26351-0880 | Oil & Gas Operator | Jul 2016 |
| 32 | Trittipo, J. L. | | Oil & Gas Operator | Nov 1997 |
| 33 | TSR Enterprises, LLC | Harrisville, WV 26362-7631 | Oil & Gas Operator | Dec 2021 |
| 34 | Tucker, Gene | | Oil & Gas Operator | Dec 2011 |
| 35 | Tug Fork Development | Catlettsburg, KY 41129 | Gas Operator | Dec 2021 |
| 36 | Tug Hill Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2021 |
| 37 | Tully Drilling Company | | Gas Operator | Dec 2021 |
| 38 | Tuscany Gas Limited Liability Company | | Gas Operator | Dec 2021 |