| 1 | A D D Productions | Sweetwater, TX 79556 | Oil & Gas Operator | Jul 2019 |
| 2 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 3 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 4 | Abernathy Auto, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Dec 2025 |
| 6 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 7 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 8 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 9 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 10 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2025 |
| 11 | All-Southwest Petroleum, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Oct 1997 |
| 12 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 13 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 14 | Ambrit Energy Corp. | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 15 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 16 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Dec 2025 |
| 17 | American Energy Texas Inc | Mineral Wells, TX 76067 | Oil Operator | Dec 2025 |
| 18 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 19 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 20 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2025 |
| 21 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 22 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 23 | Anthony, Bob G. Inc. | Brookhaven, MS 39601 | Oil & Gas Operator | Dec 2025 |
| 24 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 25 | Aransas DRLG & Workover Co Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Jul 2019 |
| 26 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 27 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 28 | Arleand Resources | Overton, TX 75684 | Oil & Gas Operator | Dec 2025 |
| 29 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 30 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 31 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 32 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 33 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |