| 1 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 2 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 3 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 4 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 5 | Taurus Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 6 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 7 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Mar 2025 |
| 8 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2025 |
| 9 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Mar 2025 |
| 10 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Mar 2025 |
| 11 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Apr 2025 |
| 12 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 2025 |
| 13 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Mar 2025 |
| 14 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 15 | Texas Crude Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 16 | Texas Energy & Environmental | Houston, TX 77070 | Oil & Gas Operator | Nov 1998 |
| 17 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Apr 2025 |
| 18 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 19 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 20 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 21 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 22 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 23 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Apr 2025 |
| 24 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2024 |
| 25 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 26 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 27 | Topco Inc | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2005 |
| 28 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 29 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 30 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 31 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Apr 2025 |
| 32 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 33 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Apr 2025 |
| 34 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 35 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 36 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 37 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2025 |
| 38 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 39 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 40 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Apr 2025 |
| 41 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 42 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2025 |
| 43 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 44 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 45 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 46 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Apr 2025 |
| 47 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 48 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |