| 1 | Battlecat Oil & Gas, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2017 |
| 2 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 3 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 4 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 5 | Bluestone Natural Resources, LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2015 |
| 6 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Oct 2025 |
| 7 | Bordertown Energy Resources, LLC | Bryan, TX 77802 | Oil & Gas Operator | Oct 2025 |
| 8 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 9 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Oct 2025 |
| 10 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 12 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 13 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 14 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 15 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 16 | Burns Production Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2008 |