| 1 | B & B Drilling Co. | Milano, TX 76556 | Oil & Gas Operator | Jul 2015 |
| 2 | B & T Operating Co. | Dawson, TX 76639 | Oil & Gas Operator | Oct 2025 |
| 3 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 4 | B-T Oil Field Supply, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Jul 2002 |
| 5 | Baird Oil Company Inc | Lewisville, TX 75067 | Oil & Gas Operator | Oct 2025 |
| 6 | Bar-Mac Investments Inc. | Brenham, TX 77834 | Oil & Gas Operator | Jun 2017 |
| 7 | Bass Petroleum | Austin, TX 78720 | Oil & Gas Operator | Aug 2004 |
| 8 | Bass Petroleum Inc | Austin, TX 78716 | Oil & Gas Operator | Oct 2025 |
| 9 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 10 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 11 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 12 | Bet-Ro, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Oct 2025 |
| 13 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 14 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 15 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 16 | Blessing Energy, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 17 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Oct 2025 |
| 18 | Bosco Petroleum LLC | Muenster, TX 76252 | Oil Operator | Oct 2025 |
| 19 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 20 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 21 | Brenham Drilling Co. | Flatonia, TX 78941 | Oil & Gas Operator | Oct 2025 |
| 22 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 23 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 24 | Brittany Drilling Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2000 |
| 25 | Broman Oil & Gas LP | Fort Worth, TX 76102 | Oil & Gas Operator | May 2017 |
| 26 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 27 | Buckeye Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2018 |