| 1 | Apache Natural Gas Co., Inc. | | Oil Operator | Nov 1992 |
| 2 | Atlantic Petroleum Co. | | Oil Operator | Mar 2000 |
| 3 | Axis Onshore, LP | | Oil & Gas Operator | Dec 2010 |
| 4 | Bsfi Western E & P, Inc. | | Oil & Gas Operator | Jun 2005 |
| 5 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 6 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 7 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 8 | Exchange Expl & Prodn Co | | Oil Operator | Oct 2023 |
| 9 | Floyd Williams | | Oil Operator | Aug 1988 |
| 10 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 11 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 12 | Halcon Louisiana Operating, LP | | Oil & Gas Operator | Sep 2017 |
| 13 | Longleaf Gas & Oil | | Oil Operator | May 2010 |
| 14 | Paloma Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 15 | Pompano Resource Operator LLC | | Oil & Gas Operator | Jun 2025 |
| 16 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 17 | Signal, LLC Of Mississippi | | Oil & Gas Operator | Dec 2024 |
| 18 | Summit Resources, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2016 |
| 19 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 20 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |
| 21 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 22 | Texas Pacific Oil Company Inc. | | Oil & Gas Operator | Dec 1980 |
| 23 | University Field Management LLC | | Oil Operator | Nov 2024 |
| 24 | Wilcox Energy Company | | Oil & Gas Operator | Jul 2025 |