| 1 | 3R Operating , LLC | Houston, TX 77269 | Oil & Gas Operator | Sep 2025 |
| 2 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | Sep 2025 |
| 5 | A & G Oil Company, LLC | Barstow, TX 79719 | Oil & Gas Operator | Feb 2012 |
| 6 | A & G Producers, Inc. | Barstow, TX 79719 | Oil & Gas Operator | Sep 2025 |
| 7 | A&M Oil & Gas LLC | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 8 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Sep 2025 |
| 9 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 10 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2025 |
| 11 | Aghorn Operating, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Sep 2025 |
| 12 | Aj'S Pump Truck Service, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Sep 2025 |
| 13 | Alleder Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 14 | Alta Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 15 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 16 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 17 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 18 | Ameredev Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Sep 2025 |
| 19 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 20 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | Sep 2025 |
| 21 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 22 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 23 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 24 | Angle Oil Company | Hays, KS 67601 | Oil Operator | Sep 2002 |
| 25 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 26 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 27 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Sep 2025 |
| 28 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 29 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 30 | Arete Creek Operating, LLC | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 31 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 32 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 33 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2010 |
| 34 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 35 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 36 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 37 | B & B Energy | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 38 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | Sep 2025 |
| 39 | B & M Energy | Midland, TX 79705 | Oil & Gas Operator | Jul 2003 |
| 40 | B & S Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Jun 2025 |
| 41 | Baker Operating, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Sep 2025 |
| 42 | Baldwin And Baldwin Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1993 |
| 43 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 44 | Barrow Petroleum LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 45 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Sep 2025 |
| 46 | Basin Oil & Gas Operating LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 47 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 48 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 49 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 50 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 51 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 52 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 53 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 54 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Sep 2025 |
| 55 | Beaver Oil Company Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2020 |
| 56 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 57 | Bell Energy | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 58 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 59 | Berry, O. H. | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 60 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 61 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2025 |
| 62 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Sep 2025 |
| 63 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 64 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 65 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 66 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2025 |
| 67 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 68 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 69 | Blue Star Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2025 |
| 70 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 71 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 72 | Bold Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2019 |
| 73 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 74 | Bosque Texas Oil LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 75 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 76 | Boyd & McWilliams Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 77 | Boyd, D. K. Oil And Gas Co.,Inc. | Midland, TX 79703 | Oil & Gas Operator | Sep 2025 |
| 78 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Sep 2025 |
| 79 | BPS Co. | Monahans, TX 79756 | Oil & Gas Operator | Nov 2000 |
| 80 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 81 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 82 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 83 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 84 | Brody Oil & Gas Services, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 85 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 86 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 87 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 88 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2025 |
| 89 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 90 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 91 | Burlington Res O&G Co-Permian | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 92 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 93 | Burns, Gene Oil & Gas | Odessa, TX 79765 | Oil & Gas Operator | Dec 2020 |
| 94 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 95 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 96 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 97 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 98 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Sep 2025 |
| 99 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 100 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |