| 1 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 2 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 3 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 4 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | May 2025 |
| 5 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jul 2025 |
| 6 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Apr 2025 |
| 7 | Teocalli Exploration LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 8 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Jun 2025 |
| 9 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 10 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 11 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 12 | The Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 13 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | May 2025 |
| 14 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 15 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 16 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2025 |
| 17 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 18 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 19 | TLS Operating Company | Greenwood VIlge, CO 80111 | Oil & Gas Operator | Dec 2013 |
| 20 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2024 |
| 21 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 22 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | May 2025 |
| 23 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 24 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 25 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | May 2025 |
| 26 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Apr 2025 |
| 27 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | May 2025 |
| 28 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Jul 2025 |
| 29 | Triple L Management Co Inc | Edmond, OK 73025-2908 | Oil & Gas Operator | Apr 2018 |
| 30 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2025 |
| 31 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 32 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 33 | Txok Energy Resources Company | Tulsa, OK 74172-0140 | Oil & Gas Operator | Feb 2017 |