| 1 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | Nov 2025 |
| 2 | A & B Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Apr 2015 |
| 3 | A&M Oil & Gas LLC | Kermit, TX 79745 | Oil & Gas Operator | Nov 2025 |
| 4 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Nov 2025 |
| 6 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 7 | Accidie Exploration And Dev.,Inc | Plano, TX 75023 | Oil & Gas Operator | Nov 2025 |
| 8 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Nov 2025 |
| 9 | Alchemist Energy, LLC | Irving, TX 75062 | Oil & Gas Operator | Nov 2025 |
| 10 | Alcon H2oil LLC | Pecos, TX 79772 | Oil & Gas Operator | Nov 2025 |
| 11 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Nov 2025 |
| 12 | Alps Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Aug 1999 |
| 13 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 14 | American Quasar Petroleum Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2014 |
| 15 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Amtex Energy | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 17 | Amtex Energy, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Nov 2025 |
| 18 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2025 |
| 19 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Aug 2025 |
| 20 | Angelo, Ernest, Jr. | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 21 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Nov 2025 |
| 22 | Apex Resources LLC | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2025 |
| 23 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Nov 2025 |
| 24 | Arabella Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |
| 25 | Arabella Petroleum Company, LLC | Austin, TX 78701 | Oil & Gas Operator | Nov 2025 |
| 26 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Nov 2025 |
| 27 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 28 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 29 | Arena Production Company | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 30 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 31 | Argus Drilling, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 32 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 33 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 34 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 35 | Atlantic Exploration, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2015 |
| 36 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 37 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Nov 2025 |