| 1 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | Oct 2024 |
| 2 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Oct 2024 |
| 3 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Dec 2024 |
| 4 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 5 | Tennessee Gas Pipeline Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2011 |
| 6 | Tetra Energy LLC | Fort Smith, AR 72917-0476 | Gas Operator | Oct 2019 |
| 7 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Aug 2024 |
| 8 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 9 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 10 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 11 | Texinia Limited Partnership | Dallas, TX 75201 | Gas Operator | Jan 2017 |
| 12 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Oct 2024 |
| 13 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 14 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2024 |
| 15 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 16 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 17 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 18 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 19 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 20 | Tucker Ron & Co | Norman, OK 73069-8511 | Gas Operator | Sep 2017 |
| 21 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 22 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |
| 23 | Tytan Operating Company LLC | Edmond, OK 73083-3794 | Oil & Gas Operator | May 2016 |