| 1 | B & D Operating Company | | Oil & Gas Operator | Apr 1990 |
| 2 | Badak Energy Inc. | | Oil & Gas Operator | Oct 2020 |
| 3 | Badak Energy-Carraway Co | | Oil Operator | Dec 1990 |
| 4 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Oct 2025 |
| 5 | Bayou Production Company, Inc. | | Oil & Gas Operator | Apr 1993 |
| 6 | Bayou South Gas Gather. Co L C | | Oil Operator | Oct 2002 |
| 7 | Beebe And Beebe | | Oil & Gas Operator | Jun 2000 |
| 8 | Beusa Energy, Inc. | Spring, TX 77380 | Oil & Gas Operator | Apr 2011 |
| 9 | Beusa Energy, LLC | | Oil & Gas Operator | Nov 2017 |
| 10 | BHP Billiton Petro (KCS Resources), LLC | | Oil & Gas Operator | Jul 2019 |
| 11 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 12 | BHP Billiton Petro (WSF Operating), Inc. | | Oil & Gas Operator | Jul 2019 |
| 13 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Dec 2024 |
| 14 | Bigfoot Energy Services LLC | Carthage, TX 75633 | Oil & Gas Operator | Aug 2024 |
| 15 | Bileta Corporation | | Oil & Gas Operator | Aug 2010 |
| 16 | Billy E. Bayles | | Oil & Gas Operator | Apr 1998 |
| 17 | Blackbeard Operating East LLC | Midland, TX 79701-4532 | Oil & Gas Operator | Dec 2020 |
| 18 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 19 | Blue Diamond Drilling, Inc. | | Oil Operator | Nov 1995 |
| 20 | BMR Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2024 |
| 21 | Bob Sibley | | Oil & Gas Operator | Jan 2025 |
| 22 | Bodcaw Company | | Oil & Gas Operator | Oct 1979 |
| 23 | Bonita Hydrocarbons Company | Dallas, TX 75229 | Oil & Gas Operator | Jun 2008 |
| 24 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 25 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 26 | Branch Investment Corporation | | Oil & Gas Operator | Jan 2025 |
| 27 | Bray Drilling Co., Inc. | | Oil Operator | Feb 1982 |
| 28 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 29 | Brix Operating LLC | | Gas Operator | Apr 2021 |
| 30 | Bronco Resources Inc. | | Oil Operator | Dec 1984 |
| 31 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 32 | Burns Oil & Gas Expl. | | Oil & Gas Operator | Jan 1985 |