| 1 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 2 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Mar 2025 |
| 3 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 4 | Barnes Mineral Production, LTD. | Hallettsville, TX 77964 | Oil & Gas Operator | Mar 2025 |
| 5 | Barrier Resources,L.L.C. | Cedar Park, TX 78613 | Oil & Gas Operator | Aug 2003 |
| 6 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Mar 2025 |
| 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 | Mar 2025 |
| 10 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 11 | Bell, Kelly Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 12 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Mar 2025 |
| 13 | Benchmark Oil & Gas Co. | Houston, TX 77282 | Oil & Gas Operator | Mar 2025 |
| 14 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 15 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 16 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 17 | Big Lake Corporation | Dallas, TX 75222 | Oil & Gas Operator | Mar 2025 |
| 18 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 19 | Bishop, J. E., Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2012 |
| 20 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 21 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 22 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Mar 2025 |
| 23 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 24 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 25 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 26 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 27 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 28 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2025 |
| 29 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 30 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 31 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 32 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 33 | Brinkerhoff, Bob | Houston, TX 77257 | Gas Operator | Feb 1994 |
| 34 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Mar 2025 |
| 35 | Broad Oak Energy, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Jul 2011 |
| 36 | Brown J K Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2003 |
| 37 | Brown, Geo. R Partnership,LP,The | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 38 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 39 | Bse Production Co. | Victoria, TX 77903 | Oil & Gas Operator | Mar 2025 |
| 40 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 41 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 42 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 43 | Burton, V.C. Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2016 |