| 1 | Badger Energy LLC | | Oil & Gas Operator | Dec 2024 |
| 2 | Badger Oil Corporation | Lafayette, LA 70505 | Oil & Gas Operator | Nov 2011 |
| 3 | Barnett Serio Exploration Co | | Oil & Gas Operator | Oct 1992 |
| 4 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 5 | Bay Coquille, Inc. | | Oil & Gas Operator | Jun 2023 |
| 6 | Beau Coup Oil& Gas Corporation | | Oil & Gas Operator | Feb 1986 |
| 7 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 8 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 9 | Bike Oil & Gas Company, Inc. | | Oil & Gas Operator | Aug 2002 |
| 10 | Bison Energy Partners, LLC | | Oil & Gas Operator | Jan 2025 |
| 11 | Black Elk Energy Offshore Operations LLC | | Oil & Gas Operator | Jun 2016 |
| 12 | Bois D'Arc Offshore LTD. | Houston, TX 77002 | Oil & Gas Operator | Aug 2008 |
| 13 | Bois D'Arc Operating Corporation | Houston, TX 77040 | Oil & Gas Operator | Jan 2000 |
| 14 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 15 | Borden, Inc. | Columbus, OH 43215 | Oil & Gas Operator | May 1990 |
| 16 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 17 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 18 | Breton Sound Holdings, LLC | | Oil & Gas Operator | Dec 2024 |
| 19 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 20 | Buckeye Petroleum Company, Inc | | Oil & Gas Operator | Apr 1983 |
| 21 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 22 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 23 | Burlington Res Oil & Gas LP | | Oil & Gas Operator | Mar 2013 |