| 1 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | May 2024 |
| 2 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | May 2024 |
| 3 | B A C O, LTD. | Hardin, TX 77561 | Oil & Gas Operator | Apr 2003 |
| 4 | B.O. Oil Company | Houston, TX 77089 | Oil & Gas Operator | May 2024 |
| 5 | Bagley, Roy | Magnolia, TX 77354 | Oil & Gas Operator | May 2024 |
| 6 | Balcones Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 1996 |
| 7 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 8 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 9 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 10 | Beckham Resources, Inc. | Houston, TX 77010 | Oil & Gas Operator | Mar 2011 |
| 11 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | May 2024 |
| 12 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 13 | Benchmark Oil & Gas Co. | Houston, TX 77282 | Oil & Gas Operator | May 2024 |
| 14 | Bennett, Mills Estate | Houston, TX 77057 | Oil & Gas Operator | Sep 1995 |
| 15 | Bent Wing Energy, LLC | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 16 | Bepco Operating Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2006 |
| 17 | BHB Operating Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | May 2024 |
| 18 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 19 | Big Wells Energy Corp | Katy, TX 77494 | Oil & Gas Operator | Sep 2019 |
| 20 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | May 2024 |
| 21 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 22 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 23 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 24 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 25 | Block "T" Petroleum, Inc. | Tyler, TX 75710 | Oil & Gas Operator | May 2024 |
| 26 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2023 |
| 27 | Blue Ridge Group, Inc. | Bowling Green, KY 42101 | Oil & Gas Operator | Dec 2021 |
| 28 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | May 2024 |
| 29 | Boothe Oil Company | Batson, TX 77519 | Oil & Gas Operator | Feb 2014 |
| 30 | Boothe, H. E., Jr. | Liberty, TX 77575 | Oil & Gas Operator | Dec 1996 |
| 31 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 32 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 33 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | May 2024 |
| 34 | Brandes Petroleum, B.P.C.,Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2024 |
| 35 | Brangus Energy LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2024 |
| 36 | Branta Production Company LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2024 |
| 37 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 38 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 39 | Brown, C. Douglas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2005 |
| 40 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |