| 1 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 2 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 3 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 4 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2025 |
| 5 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 6 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 7 | Texas American Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 8 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Jul 2025 |
| 9 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 10 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 11 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 12 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 13 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 14 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2025 |
| 15 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | Oct 2025 |
| 16 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 17 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 18 | Trilogy Natural Resources LLC | Edmond, OK 73025 | Oil Operator | Jun 2025 |
| 19 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 20 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 21 | TRP-Ok Properties LLC | Norman, OK 73072 | Oil & Gas Operator | Jun 2025 |
| 22 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 23 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jun 2025 |
| 24 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |