| 1 | T B K Energy Company | Brenham, TX 77833 | Oil & Gas Operator | Feb 2026 |
| 2 | T.C. Harris Pumping LLC | Hennessey, OK 73742 | Gas Operator | Jan 2026 |
| 3 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 4 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 5 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 6 | Tarka Energy LLC | Houston, TX 77056-1940 | Oil & Gas Operator | Mar 2022 |
| 7 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 8 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 9 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 10 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 11 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 12 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 13 | Teepee Oil & Gas Inc | Yukon, OK 73085 | Oil Operator | Dec 2006 |
| 14 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Apr 2026 |
| 15 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2026 |
| 16 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 17 | Teocalli Exploration LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Feb 2026 |
| 18 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Feb 2026 |
| 19 | Terry John Trust | Aurora, CO 80012-5112 | Oil & Gas Operator | May 2016 |
| 20 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 21 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2026 |
| 22 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 23 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 24 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 25 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 26 | Texas American Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2001 |
| 27 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 28 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 29 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 30 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 31 | Three Sands Investment Company | Waukomis, OK 73773 | Oil & Gas Operator | Feb 2026 |
| 32 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 33 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 34 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 35 | Tidewater Operating Co Inc | Tulsa, OK 74136-6308 | Oil & Gas Operator | Feb 2026 |
| 36 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2026 |
| 37 | Titan Oil & Gas Corporation | Edmond, OK 73013-5417 | Oil & Gas Operator | Nov 2025 |
| 38 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Feb 2026 |
| 39 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Jan 2026 |
| 40 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 41 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 42 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 43 | Tower Oil & Gas Company Inc | Englewood, CO 80111 | Oil & Gas Operator | May 2001 |
| 44 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 45 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2026 |
| 46 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 47 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 48 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 49 | Triple W Oil Inc | Chandler, OK 74834-0546 | Oil & Gas Operator | May 2013 |
| 50 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 51 | Tritex Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Jan 2013 |
| 52 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Feb 2026 |
| 53 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Feb 2026 |
| 54 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 55 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 56 | Twin Eagle Petroleum Corp | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2002 |
| 57 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Jan 2026 |
| 58 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |