| 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 | Abilene American Energy, LLC | Abilene, TX 79602 | Oil Operator | Oct 2025 |
| 4 | Abtex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2006 |
| 5 | Adams Branch Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2002 |
| 6 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 7 | Aeon Operating, Inc. | Fate, TX 75132 | Oil & Gas Operator | Oct 2025 |
| 8 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 9 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 10 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 11 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 12 | Alpha Energy | Anson, TX 79501 | Oil & Gas Operator | Oct 2016 |
| 13 | Alpha Exploration Co. | Wichita Falls, TX 76309 | Oil & Gas Operator | Oct 1998 |
| 14 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 15 | Altair Energy Corp. | Tyler, TX 75702 | Oil & Gas Operator | Jun 1994 |
| 16 | Alumni Oil LLC | Plano, TX 75024 | Oil Operator | Oct 2025 |
| 17 | Amble Petroleum Co., Inc. | Tuscola, TX 79562 | Oil Operator | Oct 2025 |
| 18 | American Eagle Operating LLC | Gainesville, TX 76240 | Oil Operator | Oct 2025 |
| 19 | American Eagle Operating, Inc. | Spring, TX 77386 | Oil Operator | Aug 2010 |
| 20 | American Energy | Abilene, TX 79604 | Oil & Gas Operator | Jul 2004 |
| 21 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 22 | Amherst Energy Holdings, LLC | Highland VLG, TX 75077 | Oil Operator | Oct 2025 |
| 23 | Ammo Energy, LLC | Oklahoma City, OK 73160 | Oil & Gas Operator | Feb 2009 |
| 24 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 25 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 26 | Andalucia Oil Company | San Antonio, TX 78258 | Oil Operator | Oct 2025 |
| 27 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 28 | Antilley, Joe | Abilene, TX 79602 | Oil & Gas Operator | Jan 2024 |
| 29 | Aogp, LLC | Turtle Lake, WI 54889 | Oil & Gas Operator | Sep 2019 |
| 30 | Aop Operating Corporation | Dallas, TX 75313 | Oil & Gas Operator | Aug 2003 |
| 31 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Oct 2025 |
| 32 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 33 | Atwell Technical Services, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 34 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 35 | Augusta Oil & Gas Inc | Abilene, TX 79604 | Oil & Gas Operator | Dec 2015 |
| 36 | Aztex Petroleum | Chandler, AZ 85249 | Oil & Gas Operator | Oct 2025 |
| 37 | Azul, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 1995 |