| 1 | A & C Oil Company, LLC | Stockdale, TX 78160 | Oil Operator | Oct 2025 |
| 2 | Aaronmark Services, LLC | New Braunfels, TX 78130 | Oil Operator | Oct 2025 |
| 3 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 4 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 5 | Adela Oil | Seguin, TX 78155 | Oil & Gas Operator | Jun 2000 |
| 6 | Advantagewon Oil, Us, Corp. | Batson, TX 77519 | Oil Operator | Dec 2019 |
| 7 | Aerie Energy | Cedar Creek, TX 78612 | Oil Operator | Oct 2025 |
| 8 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | Oct 2025 |
| 9 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 10 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Oct 2025 |
| 11 | Alcorn Energy, L.L.C. | Woodway, TX 76712 | Oil Operator | Oct 2025 |
| 12 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 13 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 14 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 16 | Andrews & Corkran, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Feb 2000 |
| 17 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 18 | Apex Resources Inc | Allison Park, PA 15101-3838 | Oil & Gas Operator | Dec 1993 |
| 19 | Arben Oil, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 20 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 21 | Arriola Operating & Consltg Inc. | Dallas, TX 75248 | Oil Operator | Oct 2025 |
| 22 | Atkinson, Clifford III | San Antonio, TX 78217 | Oil & Gas Operator | Dec 1996 |
| 23 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 24 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Oct 2025 |
| 25 | Autry, Martin | Seguin, TX 78155 | Oil Operator | Oct 2025 |
| 26 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |