| 1 | Barton Oil & Gas Co., Inc. | | Oil & Gas Operator | Sep 1993 |
| 2 | Bayshore Exploration LLC | Bellville, TX 77418 | Oil & Gas Operator | Dec 2016 |
| 3 | Beauregard Production Co Inc | | Oil Operator | Dec 2014 |
| 4 | Belle Oil, Inc. | | Oil & Gas Operator | Jul 2025 |
| 5 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 6 | BHP Petroleum, Inc. | | Oil & Gas Operator | Aug 1985 |
| 7 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 8 | Blue Ridge Group, Inc. | Bowling Green, KY 42101 | Oil & Gas Operator | Dec 2023 |
| 9 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 10 | Bonanza Salvage & Prod. Co Inc | | Oil & Gas Operator | Oct 2005 |
| 11 | BPR Energy, Inc. | | Oil & Gas Operator | Apr 2021 |
| 12 | Branta Production Company LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 13 | Brechtel Energy Corporation | | Oil & Gas Operator | Sep 2008 |
| 14 | Bridwell Oil Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 15 | Bridwell Oil MGMT Of Al, LLC | | Oil & Gas Operator | Apr 2006 |
| 16 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 17 | Bright & Schiff | | Oil & Gas Operator | Dec 1977 |
| 18 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 19 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |