| 1 | B & L Minerals, Inc. | Houston, TX 77036 | Oil & Gas Operator | Aug 2003 |
| 2 | B.A.C.O.C., Inc. | Bryan, TX 77802 | Oil & Gas Operator | May 1997 |
| 3 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | Apr 2024 |
| 4 | Badger Energy, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2024 |
| 5 | Baker, Brent Oil & Gas, Inc. | Oklahoma City, OK 73149 | Oil & Gas Operator | Apr 2024 |
| 6 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 7 | Barry Rock Oil Co. Inc. | Plain Dealing, LA 71064 | Oil & Gas Operator | Dec 2023 |
| 8 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 9 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 10 | BBL Operating Company LLC | Colleyville, TX 76034 | Oil & Gas Operator | Apr 2024 |
| 11 | BBX Operating, L.L.C. | Austin, TX 78738 | Oil & Gas Operator | Apr 2024 |
| 12 | BCL Operating, LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 13 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 14 | Belco Operating Corp. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 15 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 16 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | Apr 2024 |
| 17 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Apr 2024 |
| 18 | Big Run Production Company | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 19 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Apr 2024 |
| 20 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Apr 2024 |
| 21 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 22 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 23 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 24 | Brazos Resources, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Dec 1998 |
| 25 | Brazos Valley Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Apr 2024 |
| 26 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2024 |
| 27 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 28 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 29 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2023 |
| 30 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 31 | Brock, J. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 32 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2024 |
| 33 | Bse Production Co. | Victoria, TX 77903 | Oil & Gas Operator | Apr 2024 |
| 34 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |
| 35 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 36 | Bush, Mark A. Oil And Gas Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 37 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |