| 1 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Oct 2025 |
| 2 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jun 2025 |
| 3 | Tarwater Oil & Gas LLC | San Jose, CA 95128-4219 | Oil & Gas Operator | Dec 2023 |
| 4 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 5 | Taylor International Inc | Drumright, OK 74030-1173 | Oil & Gas Operator | Mar 2020 |
| 6 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 7 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 8 | Terrapin Energy LLC | Okmulgee, OK 74447 | Oil Operator | Jun 2025 |
| 9 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 10 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 11 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 12 | Texas Crude Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 1992 |
| 13 | Texas Energy Mutual LLC | Grapevine, TX 76051-8145 | Oil Operator | Jun 2018 |
| 14 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 15 | The KT Oil Company LLC | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 16 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Jul 2025 |
| 17 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 18 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Jun 2025 |
| 19 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 20 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Jun 2025 |
| 21 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 22 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 23 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 24 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 25 | Tolson Gary | Seminole, OK 74868-3267 | Oil & Gas Operator | May 2025 |
| 26 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 27 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 28 | Tower Wanda L Nations | Oklahoma City, OK 73123 | Oil & Gas Operator | Aug 1996 |
| 29 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2025 |
| 30 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Jun 2025 |
| 31 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 32 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Jun 2025 |
| 33 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 34 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 35 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 36 | TRP-Ok Properties LLC | Norman, OK 73072 | Oil & Gas Operator | Jun 2025 |
| 37 | Tru Operating LLC | Denton, TX 76201 | Oil & Gas Operator | Apr 2023 |
| 38 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 39 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 40 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 41 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 42 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |