| 1 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 2 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Jan 2025 |
| 3 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 4 | Tag Oil Co LLC | Ringling, OK 73456 | Oil & Gas Operator | Feb 2025 |
| 5 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2025 |
| 6 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 7 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 8 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2025 |
| 9 | Targa Pipeline Mid-Continent LLC | Sulphur, LA 70665 | Oil & Gas Operator | Jun 2018 |
| 10 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 11 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Feb 2025 |
| 12 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 13 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 14 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2025 |
| 15 | Terrapet Corporation | | Oil & Gas Operator | Jun 2011 |
| 16 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Mar 2025 |
| 17 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Feb 2025 |
| 18 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Feb 2025 |
| 19 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 20 | The Dehart Company LLC | Ardmore, OK 73402-0907 | Oil Operator | Jan 2025 |
| 21 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 22 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jan 2025 |
| 23 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 24 | Timbercreek Oil Company LLC | Healdton, OK 73438 | Oil Operator | Jan 2025 |
| 25 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2025 |
| 26 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 27 | Tomlinson Interest | | Oil & Gas Operator | Jun 2013 |
| 28 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2023 |
| 29 | Toomey Oil Company Inc | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2025 |
| 30 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 31 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 32 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 33 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Jan 2025 |
| 34 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2025 |
| 35 | Transcontinental Company | Haltom City, TX 76148-4122 | Oil & Gas Operator | Feb 2025 |
| 36 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Jan 2025 |
| 37 | Tri-City Energy Inc | Wilson, OK 73463-0196 | Oil Operator | Mar 2014 |
| 38 | Triad Of Oklahoma Inc | | Oil & Gas Operator | Feb 1996 |
| 39 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 40 | Trinity Oil & Gas Inc | Pauls Valley, OK 73075 | Oil Operator | Jan 2025 |
| 41 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 42 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 43 | Tripledee Operating Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2022 |
| 44 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2025 |
| 45 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 46 | Twilight Energy LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Apr 2025 |
| 47 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 48 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |