| 1 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 2 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 3 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 4 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 5 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 6 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 7 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 8 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 9 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Feb 2026 |
| 10 | Te-Ray Energy Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2026 |
| 11 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 12 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2026 |
| 13 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 14 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 15 | Terraquest Corporation | Edmond, OK 73034 | Oil & Gas Operator | Jul 1997 |
| 16 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Feb 2026 |
| 17 | Tex-Ok Energy, Limited Partnership | Cody, WY 82414 | Oil & Gas Operator | Feb 2026 |
| 18 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 19 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 20 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 21 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 22 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2026 |
| 23 | Thomas Blankenship Dba B S Oil Company | Lindsay, OK 73052 | Oil & Gas Operator | Dec 2025 |
| 24 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 25 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 26 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 27 | Tilley Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Feb 2026 |
| 28 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2026 |
| 29 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Jan 2026 |
| 30 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 31 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 32 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Jan 2026 |
| 33 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2026 |
| 34 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 35 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 36 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Feb 2026 |
| 37 | Triad Energy Corp Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 38 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 39 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 40 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 41 | Trilogy Natural Resources LLC | Edmond, OK 73025 | Oil & Gas Operator | Jan 2026 |
| 42 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 43 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2026 |
| 44 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 45 | Triumph Energy Inc | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2015 |
| 46 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jan 2026 |
| 47 | Troy Energy Operating LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2026 |
| 48 | TRP Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2026 |
| 49 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2026 |
| 50 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 51 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 52 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 53 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2026 |
| 54 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 55 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |