| 1 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 2 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jun 2025 |
| 3 | Tamworth Resources LLC | Broken Arrow, OK 74012-0005 | Oil & Gas Operator | Jun 2025 |
| 4 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 5 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jul 2025 |
| 6 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 7 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 8 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Jul 2025 |
| 9 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2025 |
| 10 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jun 2025 |
| 11 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 12 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 13 | Tepee Petroleum Company, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 2014 |
| 14 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 15 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 16 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 17 | Texaco Oils, Inc. | Tulsa, OK 74102-2420 | Oil & Gas Operator | Jan 2003 |
| 18 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 19 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 20 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 21 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 22 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Jun 2025 |
| 23 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 24 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 25 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 26 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 27 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 28 | Trans-Western Expl. Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 1993 |
| 29 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 30 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 31 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 32 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 33 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Jul 2025 |
| 34 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 35 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |