| 1 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 2 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 3 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2025 |
| 4 | Taylor John A | | Oil & Gas Operator | Jan 2016 |
| 5 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 6 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 7 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2025 |
| 8 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2025 |
| 9 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2025 |
| 10 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 11 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2024 |
| 12 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2025 |
| 13 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 14 | Tessera Energy LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2025 |
| 15 | Tex-Ok Energy LP | Cody, WY 82414 | Oil & Gas Operator | Feb 2025 |
| 16 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Feb 2025 |
| 17 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Dec 2024 |
| 18 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 19 | Texakoma Exploration & Production LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2024 |
| 20 | Texas Moran Exploration Company | Houston, TX 77098 | Oil & Gas Operator | Jun 2023 |
| 21 | Texas Southwest Gas LLC | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2022 |
| 22 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 23 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 24 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 25 | Tilley Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Feb 2025 |
| 26 | Todd John C | Oklahoma City, OK 73112-8049 | Oil & Gas Operator | May 2015 |
| 27 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2023 |
| 28 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 29 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 30 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2025 |
| 31 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2025 |
| 32 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2025 |
| 33 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |
| 34 | Triplett Larry W | Oklahoma City, OK 73112-5325 | Oil & Gas Operator | Mar 2015 |
| 35 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 36 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | Apr 2025 |
| 37 | Tuthill S Keith & Bill Barbee | Amarillo, TX 79101-1427 | Oil & Gas Operator | Dec 2004 |
| 38 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 39 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |