| 1 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Dec 2024 |
| 2 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 3 | Taylor Energy Corporation | Amarillo, TX 79114 | Oil & Gas Operator | Feb 1999 |
| 4 | Taylor, Gordon Oil Company | Sunray, TX 79086 | Oil & Gas Operator | Apr 1996 |
| 5 | TB Petroleum, LLC | Petrolia, TX 76377 | Oil & Gas Operator | Dec 2024 |
| 6 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Dec 2024 |
| 7 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 8 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2024 |
| 9 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Dec 2024 |
| 10 | Tess Oil Company | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 11 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Dec 2024 |
| 12 | Texas American Resources Company | Austin, TX 78701 | Oil & Gas Operator | Dec 2024 |
| 13 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2024 |
| 14 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 15 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 16 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 17 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2024 |
| 18 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2024 |
| 19 | Transpetco I | Shreveport, LA 71101 | Oil & Gas Operator | May 2009 |
| 20 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Dec 2024 |
| 21 | Trek Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Dec 2024 |
| 22 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |