| 1 | Bandera Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2017 |
| 2 | Basal Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Feb 2026 |
| 3 | Beacon Energy Corporation (1) | Fredericksbrg, TX 78624 | Gas Operator | Sep 2002 |
| 4 | Bedrock Production, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Feb 2026 |
| 5 | Ben-Co Operating Co., LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 6 | Big State Industries, Inc. | Houston, TX 77010 | Oil & Gas Operator | Apr 2024 |
| 7 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Feb 2026 |
| 8 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 9 | Blackwater Oil & Gas Corporation | Colleyville, TX 76034 | Oil & Gas Operator | May 2018 |
| 10 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 11 | Braka Operating, L.L.C. | Ranger, TX 76470 | Oil & Gas Operator | Feb 2026 |
| 12 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 13 | Brazos Operating LLC | Midland, TX 79710 | Gas Operator | Feb 2026 |
| 14 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2025 |
| 15 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |