| 1 | B & M Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2011 |
| 2 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 3 | B. & L. Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Mar 2025 |
| 4 | B. J. P. Operating | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 5 | B.O. Oil Company | Houston, TX 77089 | Oil & Gas Operator | Mar 2025 |
| 6 | Bailey, L. J. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2003 |
| 7 | Bair'S Lease Service, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 8 | Base Petroleum | Houston, TX 77096 | Oil & Gas Operator | Jul 1994 |
| 9 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 10 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 11 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 12 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 13 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2025 |
| 14 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 15 | Blue Ridge Oil & Gas Exp., Inc. | Belleville, MI 48111 | Gas Operator | Jul 1994 |
| 16 | Blue River Inc. | Abilene, TX 79608 | Oil Operator | Mar 2025 |
| 17 | Bluebonnet Exploration Company | New Braunfels, TX 78130 | Oil & Gas Operator | Apr 2018 |
| 18 | Bob-Kat Oil Co. | Prairie Lea, TX 78661 | Oil & Gas Operator | Mar 2025 |
| 19 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 20 | Brac Oil | La Vernia, TX 78121 | Oil Operator | Mar 2025 |
| 21 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 22 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 23 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |