| 1 | B & D Operating Company | | Oil & Gas Operator | Apr 1990 |
| 2 | Baker Petroleum Corporation | | Gas Operator | Dec 1995 |
| 3 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 4 | Bass-Franks | | Oil & Gas Operator | Jun 1997 |
| 5 | Bayou South Gas Gather. Co L C | | Oil Operator | Oct 2002 |
| 6 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 7 | Beusa Energy, Inc. | Spring, TX 77380 | Oil & Gas Operator | Apr 2011 |
| 8 | Beusa Energy, LLC | | Oil & Gas Operator | Nov 2017 |
| 9 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 10 | Bill Foster | | Oil Operator | Dec 2024 |
| 11 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 12 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 13 | Brammer-Keystone Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 14 | Bridas Energy USA, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Aug 2008 |
| 15 | Brighton Energy, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 16 | Broco Oil, LP | | Oil & Gas Operator | Nov 2024 |
| 17 | Broyles-Wheless Industries Inc | | Oil & Gas Operator | Apr 1993 |
| 18 | Burlington Res Oil & Gas Co | | Oil & Gas Operator | Dec 2000 |