| 1 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 2 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jan 2025 |
| 3 | Tarrant Tracy Dba Trace Oil | Crescent, OK 73028 | Oil & Gas Operator | Feb 2021 |
| 4 | Taylor John A | | Oil & Gas Operator | Jan 2016 |
| 5 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 6 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 7 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 8 | Temex Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 9 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 10 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 11 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2025 |
| 12 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 13 | Texaco Exploration And Production Inc | Houston, TX 77236 | Oil & Gas Operator | Nov 2024 |
| 14 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 15 | Texaco Oils, Inc. | Tulsa, OK 74102-2420 | Oil & Gas Operator | Jan 2003 |
| 16 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 17 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 18 | Texla Energy Products LLC | Houston, TX 77002 | Oil Operator | Sep 2020 |
| 19 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 20 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 21 | THR Oil | Konawa, OK 74849 | Oil & Gas Operator | Jan 2014 |
| 22 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 23 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 24 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2024 |
| 25 | TLM Resources Inc | Enid, OK 73706-0641 | Gas Operator | Mar 2015 |
| 26 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 27 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 28 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 29 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 30 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jan 2025 |
| 31 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 32 | Trenchco Inc | Shawnee, OK 74802-3577 | Oil & Gas Operator | Apr 2015 |
| 33 | Tri-Ex Petroleum, L.P. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2013 |
| 34 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 35 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 36 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 37 | Turnbow John R Company | Tulsa, OK 74120-2420 | Oil & Gas Operator | Aug 2006 |
| 38 | Turner Resources Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2024 |
| 39 | Twenty/Twenty Oil & Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 40 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 41 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |