| 1 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 2 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 3 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 4 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 5 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 6 | Tau Ventures | Tulsa, OK 74105-1026 | Oil & Gas Operator | Sep 2025 |
| 7 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 8 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Oct 2025 |
| 9 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 10 | Tekenergy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 11 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2025 |
| 12 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 13 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 14 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 15 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 16 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 17 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2025 |
| 18 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 19 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 20 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 21 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 22 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 23 | TLC Oil And Gas | Duncan, OK 73533-9477 | Oil & Gas Operator | Oct 2015 |
| 24 | Toco Oil & Gas Co | Grapevine, TX 76051 | Oil & Gas Operator | Feb 1993 |
| 25 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 26 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 27 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Dec 2025 |
| 28 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Oct 2025 |
| 29 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 30 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 31 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Oct 2025 |
| 32 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Oct 2025 |
| 33 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 34 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Oct 2025 |
| 35 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Oct 2025 |
| 36 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Oct 2025 |
| 37 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 38 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 39 | Trinity Oil & Gas Inc | Pauls Valley, OK 73075 | Oil Operator | Jul 2025 |
| 40 | Triple Diamond Energy Operating LLC | Dallas, TX 75254-8352 | Oil & Gas Operator | Jun 2014 |
| 41 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 42 | Tripledee Operating Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2022 |
| 43 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 44 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 45 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 46 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 47 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2025 |
| 48 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 49 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |