| 1 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Oct 2024 |
| 2 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Sep 2024 |
| 3 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 4 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 5 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 6 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Sep 2024 |
| 7 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2024 |
| 8 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Aug 2024 |
| 9 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 10 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 11 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2024 |
| 12 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 13 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Sep 2024 |
| 14 | Torch Energy MKT Inc | Houston, TX 77010 | Oil & Gas Operator | Aug 1996 |
| 15 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 16 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 17 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2024 |
| 18 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 19 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2024 |
| 20 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |