| 6001 | Tonkawa Saltwater Disposal LLC | Tonkawa, OK 74653 | Oil Operator | Dec 2015 |
| 6002 | Tonner Petroleum LLC | Dallas, TX 75248-3326 | Oil Operator | Feb 2011 |
| 6003 | Tony Oil Company | | Oil & Gas Operator | Jan 2025 |
| 6004 | Tony'S Disposal Service Inc | Yale, OK 74085 | Oil Operator | Aug 1997 |
| 6005 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Feb 2025 |
| 6006 | Toomey Oil Company Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2025 |
| 6007 | Topco Inc | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2005 |
| 6008 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 6009 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 6010 | Tornado Energy Corporation | Sugarland, TX 77479-7124 | Oil & Gas Operator | Nov 2014 |
| 6011 | Totah Production | Duncan, OK 73533-9406 | Oil Operator | Mar 2015 |
| 6012 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 6013 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 6014 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 6015 | Tower Oil & Gas Company, Inc. | Englewood, CO 80111 | Oil & Gas Operator | May 2001 |
| 6016 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 6017 | Townsend Operating Company | | Oil & Gas Operator | Jan 2008 |
| 6018 | Townsend V E | Ada, OK 74820 | Oil & Gas Operator | May 2013 |
| 6019 | Tpet, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 6020 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Feb 2025 |
| 6021 | Trace Operating Co & R Hudson | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2013 |
| 6022 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 6023 | Trachtenberg Daniel S | Houston, TX 77071 | Oil Operator | Feb 2025 |
| 6024 | Trackstar Energies LLC | Colorado Springs, CO 80919-3233 | Oil Operator | Mar 2023 |
| 6025 | Tracy & Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 6026 | Trafalgar House Oil & Gas Inc. | Houston, TX 77002-7346 | Oil & Gas Operator | Jan 1992 |
| 6027 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Mar 2025 |
| 6028 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Feb 2025 |
| 6029 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 6030 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 6031 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 6032 | Trans Terra Corp Int'L | Amarillo, TX 79159-0370 | Oil & Gas Operator | Jul 1993 |
| 6033 | Trans-Western Expl. Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 1993 |
| 6034 | Transamerican Energy LTD | Dallas, TX 75231-1075 | Oil & Gas Operator | Apr 2014 |
| 6035 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 6036 | Transcontinental Company | Haltom City, TX 76148-4122 | Oil & Gas Operator | Mar 2025 |
| 6037 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 6038 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | May 2025 |
| 6039 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 6040 | Travco Well Servicing LLC | Okmulgee, OK 74447 | Oil Operator | Feb 2025 |
| 6041 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 6042 | Traynor Oil & Gas Inc | Claremont, CA 91711-2837 | Oil & Gas Operator | Jan 2024 |
| 6043 | Treat Howard | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2014 |
| 6044 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 6045 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 6046 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 6047 | Trenon Oil & Gas Inc | Oklahoma City, OK 73112-4279 | Oil & Gas Operator | Sep 1996 |
| 6048 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Mar 2025 |
| 6049 | Trepel Petroleum Exploration & | | Oil & Gas Operator | Apr 2014 |
| 6050 | Tresco Energy LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Jan 2025 |
| 6051 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 6052 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Mar 2025 |
| 6053 | Tri-C Resources, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 6054 | Tri-City Energy Inc | Wilson, OK 73463-0196 | Oil Operator | Mar 2014 |
| 6055 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 6056 | Tri-State Pipeline Service Inc | Ninnekah, OK 73067-0189 | Oil & Gas Operator | Mar 2011 |
| 6057 | Tri-Unity Inc | Sand Springs, OK 74063-4401 | Oil & Gas Operator | Jun 2009 |
| 6058 | Triad Energy Corp. Of Texas | Houston, TX 77057-2696 | Oil & Gas Operator | Sep 2014 |
| 6059 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Mar 2025 |
| 6060 | Triad Resources Inc | Spring, TX 77389 | Oil & Gas Operator | Dec 2020 |
| 6061 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 6062 | Triangle Three Resources L.L.C. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 6063 | Tridon Oil Inc | Lafayette, LA 70505-2305 | Gas Operator | Dec 2013 |
| 6064 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 6065 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 6066 | Trigger'S Disposal LLC | Sayre, OK 73662-2913 | Oil Operator | Sep 2022 |
| 6067 | Trilliant Energy Texas LTD | Tulsa, OK 74135-0767 | Oil & Gas Operator | Jun 2020 |
| 6068 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 6069 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | May 2025 |
| 6070 | Trinity Oil & Gas Inc | Pauls Valley, OK 73075 | Oil Operator | Feb 2025 |
| 6071 | Trinity Oil & Gas Producers LLC | Allen, OK 74825 | Oil & Gas Operator | Feb 2025 |
| 6072 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 6073 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 6074 | Trio Consulting & MGMT LLC | Wichita Falls, TX 76301 | Oil Operator | Feb 2025 |
| 6075 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 6076 | Triple "S" Gas, Inc. | Louisville, KY 40255 | Oil & Gas Operator | May 2025 |
| 6077 | Triple "S" Resources Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 1995 |
| 6078 | Triple 7 Energy Company Inc | Prague, OK 74864 | Oil Operator | Feb 1997 |
| 6079 | Triple B Resources | Barnsdall, OK 74002-9759 | Oil & Gas Operator | May 2014 |
| 6080 | Triple C Properties Inc | Seminole, OK 74818 | Oil & Gas Operator | Mar 2025 |
| 6081 | Triple Diamond Energy Operating LLC | Dallas, TX 75254-8352 | Oil & Gas Operator | Jun 2014 |
| 6082 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 6083 | Triple H Operating | Tryon, OK 74875-6235 | Oil Operator | Apr 2022 |
| 6084 | Triple L Management Co Inc | Edmond, OK 73025-2908 | Oil & Gas Operator | Apr 2018 |
| 6085 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 6086 | Triple W Oil Inc | Chandler, OK 74834-0546 | Oil & Gas Operator | May 2013 |
| 6087 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 6088 | Tripledee Operating Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2022 |
| 6089 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 6090 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | May 2025 |
| 6091 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 6092 | Trissell Alva Lee | Willow, OK 73673-9602 | Oil Operator | Apr 2020 |
| 6093 | Tritex Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jan 2013 |
| 6094 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 6095 | Triumph Energy Partners LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Feb 2025 |
| 6096 | Triumph Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2015 |
| 6097 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 6098 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Mar 2025 |
| 6099 | Trojan Resources LLC | Sapulpa, OK 74066-8095 | Oil Operator | Feb 2025 |
| 6100 | Trout Disposal Well Inc | Hammon, OK 73650 | Oil & Gas Operator | Jan 2025 |