| 1 | 1920 Energy, LLC | Allen, TX 75013 | Oil & Gas Operator | Sep 2025 |
| 2 | 299 Production, LLC | Judson, TX 75660 | Oil & Gas Operator | Nov 2016 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | 801 LLC | Artesia, NM 88211 | Oil & Gas Operator | Oct 2023 |
| 5 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | Sep 2025 |
| 6 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2025 |
| 7 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 8 | Admiral Permian Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 9 | Aegis Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Sep 1998 |
| 10 | Alchemist Energy, LLC | Irving, TX 75062 | Oil & Gas Operator | Sep 2025 |
| 11 | Alcon H2oil LLC | Pecos, TX 79772 | Oil & Gas Operator | Sep 2025 |
| 12 | Allison/Hobbs Inc. | Alba, TX 75410 | Oil & Gas Operator | Sep 2025 |
| 13 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 14 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 15 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 16 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 17 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 18 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 19 | Anchor B Production, Inc. | Orla, TX 79770 | Oil & Gas Operator | Aug 2003 |
| 20 | Angelo, Ernest, Jr. | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 21 | Antelope Energy Partners, LLC | Houston, TX 77027 | Oil & Gas Operator | Sep 2025 |
| 22 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 23 | Apr Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2022 |
| 24 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 25 | Arabella Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 26 | Arabella Petroleum Company, LLC | Austin, TX 78701 | Oil & Gas Operator | Sep 2025 |
| 27 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Sep 2025 |
| 28 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 29 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 30 | Arete Creek Operating, LLC | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 31 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 32 | Arris Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2016 |
| 33 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 34 | Atlantic Exploration, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2015 |
| 35 | Atlantic Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 36 | Atlantic Resources Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 37 | Atropos Production Corporation | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 38 | Audrey Oil & Gas LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 39 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2025 |
| 40 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Sep 2025 |
| 41 | B K L Incorporated | Morton, TX 79346 | Oil & Gas Operator | Jun 2002 |
| 42 | Baker Operating, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Sep 2025 |
| 43 | Baron Energy LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2005 |
| 44 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Sep 2025 |
| 45 | Basin Oil & Gas Operating LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 46 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 47 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2025 |
| 48 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 49 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 50 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 51 | Benco Operating, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 52 | Bennett, M. Brad Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2005 |
| 53 | Bennett, M. Brad LP | Midland, TX 79710 | Oil & Gas Operator | Jan 2006 |
| 54 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 55 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 56 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 57 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 58 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Apr 2025 |
| 59 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 60 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 61 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 62 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 63 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 64 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 65 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 66 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 67 | Boyd & McWilliams Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 68 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 69 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 70 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 71 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 72 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2025 |
| 73 | Brigham Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Sep 2025 |
| 74 | Brigham Resources Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Jun 2017 |
| 75 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2025 |
| 76 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 77 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 78 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 79 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2025 |
| 80 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 81 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 82 | Bulldog Operating Company | Artesia, NM 88211 | Oil & Gas Operator | Sep 2025 |
| 83 | Burkholder, Terry L., Inc. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2002 |
| 84 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 85 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 86 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 87 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 88 | Caird Operating, LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Sep 2025 |
| 89 | Callon (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 90 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 91 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Sep 2025 |
| 92 | Campana Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 93 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 94 | Capitan Energy, Incorporated | Carlsbad, NM 88221 | Oil & Gas Operator | Sep 2025 |
| 95 | Carburante Exploration Co, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Sep 2025 |
| 96 | Carrizo (Permian) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 97 | Celero Energy II, LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 98 | Centennial Resource Prod, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2023 |
| 99 | CH4 Energy Six, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 100 | Chance Properties Co. | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |