| 1 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 2 | T & K Oil, Inc | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 3 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 4 | Tandem Oil Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Oct 1998 |
| 5 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 6 | Ten Grand Energy Company Inc | Nachogdoches, TX 75963-1880 | Oil Operator | Mar 2011 |
| 7 | Terry Jack | Konawa, OK 74849-0337 | Oil Operator | Feb 2012 |
| 8 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 9 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 10 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 11 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 12 | The Guinn Company LLC | Asher, OK 74826-6012 | Oil & Gas Operator | Jun 2025 |
| 13 | The KT Oil Company LLC | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 14 | The Twenty Eleven Corp Inc | Ada, OK 74820-3605 | Oil Operator | Jun 2025 |
| 15 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Jun 2025 |
| 16 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 17 | Tidwell Oil LLC | Roff, OK 74865 | Oil Operator | Feb 2022 |
| 18 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 19 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 20 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 21 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 22 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 23 | Tracy & Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 24 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 25 | Trinity Oil & Gas Producers LLC | Allen, OK 74825 | Oil & Gas Operator | Jun 2025 |
| 26 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 27 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 28 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Jul 2025 |
| 29 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | May 2025 |
| 30 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |