| 1 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 2 | TC Oil LLC | Duncan, OK 73533 | Oil Operator | Jun 2025 |
| 3 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 4 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 5 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 6 | Tindol Jr Robert | Ryan, OK 73565 | Oil Operator | Oct 2009 |
| 7 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 8 | Tonner Petroleum LLC | Dallas, TX 75248-3326 | Oil Operator | Feb 2011 |
| 9 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Jul 2025 |
| 10 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76301 | Oil Operator | Jun 2025 |
| 11 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 12 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 13 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 14 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 15 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |