| 1 | Barbee, R.L. Operating, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Apr 2025 |
| 2 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 3 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Apr 2025 |
| 4 | Baron Energy Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Apr 2025 |
| 5 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Apr 2025 |
| 6 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2025 |
| 7 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 8 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 9 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 10 | Baylor Operating, LLC | Austin, TX 78766 | Oil & Gas Operator | Apr 2025 |
| 11 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 12 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | Apr 2025 |
| 13 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2025 |
| 14 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Apr 2025 |
| 15 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 16 | Bend Petroleum Corp | Muenster, TX 76252 | Oil & Gas Operator | Nov 2023 |
| 17 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Mar 2025 |
| 18 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 19 | Bigfoot Oil LLC | Denver, CO 80206 | Oil Operator | Apr 2025 |
| 20 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 21 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 22 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2025 |
| 23 | Bledsoe, R.K. Trust Oil Operator | Jourdanton, TX 78026 | Oil & Gas Operator | Apr 2025 |
| 24 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Apr 2025 |
| 25 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 26 | Boling Production Company, Inc. | Boling, TX 77420 | Oil & Gas Operator | Apr 2025 |
| 27 | Botasch Operating, LLC | Dilley, TX 78017 | Oil & Gas Operator | Apr 2025 |
| 28 | BP Products North America Inc | Chicago, IL 60606 | Gas Operator | Jan 2017 |
| 29 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 30 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 31 | BRC Operating Company LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 32 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Apr 2025 |
| 33 | Bronco Z Production | San Antonio, TX 78217 | Oil & Gas Operator | Jul 1998 |
| 34 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 35 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 36 | Brymer Contracting Incorporated | Pleasanton, TX 78064 | Oil & Gas Operator | Apr 2025 |
| 37 | Brymer, Jack Contr. Serv. | George West, TX 78022 | Oil Operator | Apr 2025 |
| 38 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 39 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 40 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 41 | Bush, Mark A. Oil And Gas Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |