| 1 | Admiral Permian Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 2 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Feb 2026 |
| 3 | Alchemist Energy, LLC | Irving, TX 75062 | Oil & Gas Operator | Feb 2026 |
| 4 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 5 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 6 | Ameredev Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 7 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 8 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 9 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 10 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2025 |
| 11 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 12 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2026 |
| 13 | Arch Oil & Gas, LLC | Ennis, TX 75119 | Oil & Gas Operator | Feb 2026 |
| 14 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 15 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 16 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 17 | Aroc (Texas) Inc. | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 18 | Associated Operating & Explor. | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 19 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 20 | Atlantic Operating II, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 21 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 22 | Atlantic Resources Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 23 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 24 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 25 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |