| 1 | B & H Gas, Inc. | Weatherford, TX 76086 | Gas Operator | Aug 2000 |
| 2 | Baja Production | Bridgeport, TX 76426 | Oil & Gas Operator | Feb 2026 |
| 3 | Banks, R. C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2016 |
| 4 | Barnett Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 5 | Barnett Oil Investments, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Mar 1999 |
| 6 | Basal Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Feb 2026 |
| 7 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Feb 2026 |
| 8 | Bedrock Production, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Feb 2026 |
| 9 | Bell, O. M. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 10 | Best Petroleum Explorations,Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 11 | Big Star Exploration | Fort Worth, TX 76121 | Oil & Gas Operator | Feb 2026 |
| 12 | Bivins, Orville J. Jr. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2004 |
| 13 | BKV Barnett, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Feb 2026 |
| 14 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Feb 2026 |
| 15 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 16 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 17 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 18 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 19 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 20 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Feb 2026 |
| 21 | Borderline Operating Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 22 | Bowerman Exploration, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2009 |
| 23 | Bowerman Investments Inc. | Arlington, TX 76003 | Oil & Gas Operator | Feb 2026 |
| 24 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Feb 2026 |
| 25 | Brazos Operating LLC | Midland, TX 79710 | Gas Operator | Feb 2026 |
| 26 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 27 | Briar Energy Corporation | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 28 | Brigadier Operating, LLC | Plano, TX 75024 | Oil & Gas Operator | Aug 2017 |
| 29 | Briley Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 30 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 31 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 32 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 33 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |