| 1 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Apr 2025 |
| 2 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 3 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Apr 2025 |
| 4 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 5 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2025 |
| 6 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 7 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 8 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 9 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2025 |
| 10 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Apr 2025 |
| 11 | BB-Southtex, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2024 |
| 12 | Beaver Oil & Gas Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 13 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Apr 2025 |
| 14 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 15 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 16 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 17 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Apr 2025 |
| 18 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 19 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 20 | Big Lake Corporation | Dallas, TX 75222 | Oil & Gas Operator | Apr 2025 |
| 21 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Apr 2025 |
| 22 | Big Sky Energy, LLC | Cody, WY 82414 | Oil & Gas Operator | May 2024 |
| 23 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 24 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 25 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2025 |
| 26 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Apr 2025 |
| 27 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Apr 2025 |
| 28 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Apr 2025 |
| 29 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 30 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 31 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 32 | BP Products North America Inc | Chicago, IL 60606 | Gas Operator | Jan 2017 |
| 33 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 34 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2025 |
| 35 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 36 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 37 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 38 | Bronco Z Production | San Antonio, TX 78217 | Oil & Gas Operator | Jul 1998 |
| 39 | Brooklyn Union Explor. Co., Inc. | Houston, TX 77010 | Oil & Gas Operator | Jan 1994 |
| 40 | Brown, Geo. R Partnership,LP,The | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 41 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 42 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 43 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 44 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2025 |
| 45 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 46 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 47 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Apr 2025 |