| 1 | A.D.S. Resources, Inc. | Lubbock, TX 79413 | Oil & Gas Operator | Jul 2008 |
| 2 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 3 | Abbott, John Operating | Abilene, TX 79605 | Oil & Gas Operator | Mar 2025 |
| 4 | Aberdeen Petroleum (USA) Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1994 |
| 5 | Abilene American Energy, LLC | Abilene, TX 79602 | Oil Operator | Mar 2025 |
| 6 | Ableready, Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2025 |
| 7 | Abtex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2006 |
| 8 | Abx Oil & Gas, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 9 | Adams Branch Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2002 |
| 10 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 11 | Aeon Operating, Inc. | Fate, TX 75132 | Oil & Gas Operator | Mar 2025 |
| 12 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Mar 2025 |
| 13 | Albany Well Service | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 14 | Albert, David Oil & Gas | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 15 | Albert-Bishop Exploration Co Inc | Dallas, TX 75240 | Oil & Gas Operator | Feb 2007 |
| 16 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 17 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 18 | Allegiance Operating Inc. | Wichita Falls, TX 76307 | Oil Operator | Mar 2025 |
| 19 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 20 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 21 | Alpha Energy | Anson, TX 79501 | Oil & Gas Operator | Oct 2016 |
| 22 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 23 | Ambassador Oil Company, LLC | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 24 | Amble Petroleum Co., Inc. | Tuscola, TX 79562 | Oil Operator | Mar 2025 |
| 25 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 26 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 27 | American Eagle Operating, Inc. | Spring, TX 77386 | Oil Operator | Aug 2010 |
| 28 | American Energy | Abilene, TX 79604 | Oil & Gas Operator | Jul 2004 |
| 29 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 30 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Mar 2025 |
| 31 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 32 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 33 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 34 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 35 | Anderson, Roger W. Corp. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2020 |
| 36 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 37 | Arabella Petroleum Company, LLC | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 38 | Archer Petroleum | Frisco, TX 75034 | Oil & Gas Operator | Aug 2021 |
| 39 | Arledge & Young, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Feb 1999 |
| 40 | Armor Petroleum Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 41 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 42 | Arriola Operating & Consltg Inc. | Dallas, TX 75248 | Oil Operator | Mar 2025 |
| 43 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Mar 2025 |
| 44 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2025 |
| 45 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 46 | Astin Corp. | Dallas, TX 75229 | Oil & Gas Operator | Sep 1994 |
| 47 | Athena Resources, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Mar 2025 |
| 48 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 49 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 50 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 51 | Augusta Oil & Gas Inc | Abilene, TX 79604 | Oil & Gas Operator | Dec 2015 |
| 52 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 53 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |