| 1 | B & B Drilling Co. | Milano, TX 76556 | Oil & Gas Operator | Jul 2015 |
| 2 | B & L Minerals, Inc. | Houston, TX 77036 | Oil & Gas Operator | Aug 2003 |
| 3 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Feb 2026 |
| 4 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 5 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | Feb 2026 |
| 6 | Baker, Brent Oil & Gas, Inc. | Oklahoma City, OK 73149 | Oil & Gas Operator | Feb 2026 |
| 7 | Bar-Mac Investments Inc. | Brenham, TX 77834 | Oil & Gas Operator | Jun 2017 |
| 8 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 9 | Bass Petroleum | Austin, TX 78720 | Oil & Gas Operator | Aug 2004 |
| 10 | Bass Petroleum Inc | Austin, TX 78716 | Oil & Gas Operator | Feb 2026 |
| 11 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 12 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 13 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Feb 2026 |
| 14 | BBX Operating, L.L.C. | Austin, TX 78738 | Oil & Gas Operator | Feb 2026 |
| 15 | BCL Operating, LLC | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 16 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 17 | Bet-Ro, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Feb 2026 |
| 18 | Bison Energy Partners, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2001 |
| 19 | Bison Energy Partners, LTD. | Houston, TX 77060 | Oil & Gas Operator | Apr 2002 |
| 20 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Feb 2026 |
| 21 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Feb 2026 |
| 22 | Bralex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Feb 2026 |
| 23 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Feb 2026 |
| 24 | Brandes Petroleum, B.P.C.,Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 25 | Brazos Resources, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Dec 1998 |
| 26 | Brazos Valley Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Feb 2026 |
| 27 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 28 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 29 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 30 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Feb 2026 |
| 31 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 32 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |