| 1 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Apr 2024 |
| 2 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Apr 2024 |
| 3 | B & T Operating Co. | Dawson, TX 76639 | Oil & Gas Operator | Apr 2024 |
| 4 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 5 | Barnhart Co. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 6 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 7 | Barrier Resources LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Aug 2003 |
| 8 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Apr 2024 |
| 9 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 10 | Battlecat Oil & Gas, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2017 |
| 11 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 12 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 13 | Beaver Oil Company Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2020 |
| 14 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 15 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 16 | Bison Energy Partners, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2001 |
| 17 | Bison Energy Partners, LTD. | Houston, TX 77060 | Oil & Gas Operator | Apr 2002 |
| 18 | Black Gold Energy LLC | Monroe, LA 71207 | Oil Operator | Aug 2023 |
| 19 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 20 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 21 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 22 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 23 | Block "T" Petroleum, Inc. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2024 |
| 24 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 25 | Bluestone Natural Resources, LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2015 |
| 26 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Apr 2024 |
| 27 | Bordas Oil & Gas Company | Harper, TX 78631 | Oil Operator | Apr 2024 |
| 28 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 29 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2024 |
| 30 | Brask-Dumont Ranch, Inc. | Houston, TX 77255 | Oil & Gas Operator | Apr 2024 |
| 31 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 32 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2024 |
| 33 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 34 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 35 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 36 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 37 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Apr 2024 |
| 38 | Brown, C. Douglas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2005 |
| 39 | Buck Management Co. L.L.C. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2024 |
| 40 | Buck, George | Laredo, TX 78041 | Oil & Gas Operator | Aug 2003 |
| 41 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
| 42 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 43 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 44 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |