| 1 | Bandera Eagle Ford, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 2 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Oct 2025 |
| 3 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Oct 2025 |
| 4 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 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 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 8 | Bayshore Exploration LLC | Bellville, TX 77418 | Oil & Gas Operator | Dec 2016 |
| 9 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Oct 2025 |
| 10 | Beachtex Oil Company, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2025 |
| 11 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Oct 2025 |
| 12 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 13 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 14 | Black Gold Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Oct 2025 |
| 15 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 16 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 17 | Blue Marble Resources Op, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2019 |
| 18 | Botasch Operating, LLC | Dilley, TX 78017 | Oil & Gas Operator | Oct 2025 |
| 19 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 20 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 21 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 22 | Brazos Resources, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Dec 1998 |
| 23 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 24 | Brown, C. Douglas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2005 |
| 25 | Brymer, Jack Contr. Serv. | George West, TX 78022 | Oil Operator | Oct 2025 |
| 26 | Buffalo Oil Corp. | Cotulla, TX 78014 | Oil & Gas Operator | Oct 2025 |
| 27 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 28 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 29 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 30 | Bush, Mark A. Oil And Gas Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 31 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |