| 1 | Barrow-Shaver Resources Co. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 2 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Mar 2025 |
| 3 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 4 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 5 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 6 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 7 | Bison Energy Partners, LTD. | Houston, TX 77060 | Oil & Gas Operator | Apr 2002 |
| 8 | Black Diamond Operating Co., LLC | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2009 |
| 9 | Blazer Resources, Inc. | Leesburg, TX 75451 | Oil & Gas Operator | Mar 2025 |
| 10 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Mar 2025 |
| 11 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2024 |
| 12 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 13 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Mar 2025 |
| 14 | Brandon Energy, Inc. | Bullard, TX 75757 | Oil & Gas Operator | Nov 2007 |
| 15 | Brannon Oil & Gas Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2013 |
| 16 | Branta Production Company LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2025 |
| 17 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 18 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2024 |
| 19 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 20 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 21 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 22 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 23 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 24 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 25 | Brooks Petroleum Company | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 26 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 27 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |