| 1 | B K L Incorporated | Morton, TX 79346 | Oil & Gas Operator | Jun 2002 |
| 2 | Baker Operating, Inc. | Odessa, TX 79764 | Oil & Gas Operator | Oct 2025 |
| 3 | Baron Energy LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2005 |
| 4 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Oct 2025 |
| 5 | Basin Oil & Gas Operating LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 6 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 7 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 8 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 9 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 10 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 11 | Benco Operating, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 12 | Bennett, M. Brad Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2005 |
| 13 | Bennett, M. Brad LP | Midland, TX 79710 | Oil & Gas Operator | Jan 2006 |
| 14 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 15 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 16 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 17 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 18 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 19 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 20 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 21 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 22 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 23 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 24 | Blue Arrow Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 25 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 26 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 27 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 28 | Boyd & McWilliams Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 29 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 30 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 31 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 32 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 33 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 34 | Brigham Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Oct 2025 |
| 35 | Brigham Resources Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Jun 2017 |
| 36 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Oct 2025 |
| 37 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 38 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 39 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 40 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 41 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 42 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 43 | Bulldog Operating Company | Artesia, NM 88211 | Oil & Gas Operator | Oct 2025 |
| 44 | Burkholder, Terry L., Inc. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2002 |
| 45 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 46 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 47 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 48 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |