| 1 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Feb 2026 |
| 2 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Feb 2026 |
| 3 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 4 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 5 | Baluco, Inc. | Navasota, TX 77868 | Gas Operator | Mar 2009 |
| 6 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Feb 2026 |
| 7 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 8 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 9 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Feb 2026 |
| 10 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | Feb 2026 |
| 11 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 12 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 13 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 14 | Blackwell Operating Company | Houston, TX 77227 | Oil & Gas Operator | Jun 2007 |
| 15 | Blue Ridge Group, Inc. | Bowling Green, KY 42101 | Oil & Gas Operator | Dec 2023 |
| 16 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2026 |
| 17 | Boney Enterprises Prod. Co. | Houston, TX 77055 | Oil & Gas Operator | Feb 2026 |
| 18 | Boundary Ventures, Inc. | Columbus, TX 78934 | Oil Operator | Feb 2026 |
| 19 | Bozeman, John F. | Rosenberg, TX 77471 | Oil & Gas Operator | Sep 2005 |
| 20 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 21 | Brannon Oil & Gas Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2013 |
| 22 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 23 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 24 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 25 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 26 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 27 | Bruington Operating, L.L.C. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2015 |
| 28 | Bse Production Co. | Victoria, TX 77903 | Oil & Gas Operator | Feb 2026 |
| 29 | Bulldog Exploration Company | Houston, TX 77090 | Oil & Gas Operator | May 2005 |
| 30 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 31 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 32 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 33 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 34 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 35 | Burns Production Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2008 |
| 36 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |