| 1 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 2 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 3 | Taylor Petroleum LLC | Crescent, OK 73028-0340 | Oil & Gas Operator | Dec 2016 |
| 4 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 5 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 6 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 7 | Terry Jack | Konawa, OK 74849-0337 | Oil Operator | Feb 2012 |
| 8 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Jan 2026 |
| 9 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 10 | The KT Oil Company LLC | Ada, OK 74820 | Oil & Gas Operator | Feb 2026 |
| 11 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2026 |
| 12 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2026 |
| 13 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 14 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 15 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 16 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 17 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 18 | Tilford Pinson Exploration LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2026 |
| 19 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2026 |
| 20 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Jan 2026 |
| 21 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 22 | Toma Explorations LLC | Shawnee, OK 74801-0512 | Oil & Gas Operator | Feb 2025 |
| 23 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 24 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 25 | Townsend Operating Company | | Oil & Gas Operator | Jan 2008 |
| 26 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2026 |
| 27 | Trans Atlantic Resource Corp | Tulsa, OK 74136-5709 | Oil & Gas Operator | Nov 1998 |
| 28 | Transoil, Inc. | Oklahoma City, OK 73129 | Oil & Gas Operator | May 2026 |
| 29 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 30 | Travis Peak Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 31 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Feb 2026 |
| 32 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2026 |
| 33 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 34 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 35 | Tridon Oil Inc | Lafayette, LA 70505-2305 | Gas Operator | Dec 2013 |
| 36 | Trineha Inc | Ardmore, OK 73402-2478 | Oil & Gas Operator | Jun 2009 |
| 37 | Trinity Oil & Gas Inc | Pauls Valley, OK 73075 | Oil Operator | Jan 2026 |
| 38 | Trinity Oil & Gas Producers LLC | Allen, OK 74825 | Oil & Gas Operator | Feb 2026 |
| 39 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 40 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 41 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | May 2026 |
| 42 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 43 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 44 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Feb 2026 |
| 45 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | May 2026 |
| 46 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Feb 2026 |
| 47 | Turntable Energy Inc | Ponca City, OK 74604 | Oil & Gas Operator | Oct 2025 |
| 48 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Jan 2026 |
| 49 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |