| 1 | B & M Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2011 |
| 2 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 3 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 4 | Bastrop Energy Group | San Antonio, TX 78231 | Oil & Gas Operator | Feb 2026 |
| 5 | Battlecat Operating Company, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2019 |
| 6 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 7 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 8 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 9 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 10 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 11 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | Feb 2026 |
| 12 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Feb 2026 |
| 13 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 14 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 15 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Feb 2026 |
| 16 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 17 | Benson-Wyatt Oil Co. Inc. | Austin, TX 78767 | Oil & Gas Operator | Jul 2003 |
| 18 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Feb 2026 |
| 19 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Feb 2026 |
| 20 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 21 | Blackjack Operating L. L. C. | Cibolo, TX 78108 | Oil & Gas Operator | Feb 2026 |
| 22 | Bluco Production Co., Inc. | Austin, TX 78716 | Oil & Gas Operator | Feb 2026 |
| 23 | Blue River Inc. | Abilene, TX 79608 | Oil Operator | Feb 2026 |
| 24 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2026 |
| 25 | Bodden Production | Poth, TX 78147 | Oil & Gas Operator | Feb 2026 |
| 26 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Feb 2026 |
| 27 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 28 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 29 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 30 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 31 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Feb 2026 |
| 32 | Bulldog Exploration Company | Houston, TX 77090 | Oil & Gas Operator | May 2005 |
| 33 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 34 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 35 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 36 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |