| 1 | Bain Resources, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jun 2026 |
| 2 | Baldwin Lynch Energy Corp. | Billings, MT 59108 | Oil Operator | Jun 2026 |
| 3 | Balko, Inc. | Conrad, MT 59425 | Oil & Gas Operator | Apr 2026 |
| 4 | Ballantyne Ventures LLC | Shelby, MT 59474 | Oil & Gas Operator | Apr 2026 |
| 5 | Ballard Petroleum Holdings LLC | Billings, MT 59104 | Oil & Gas Operator | Jun 2026 |
| 6 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 7 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 8 | BBX Operating Co. LLC | Austin, TX 78738 | Oil & Gas Operator | Jun 2026 |
| 9 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Jul 2026 |
| 10 | Behm Energy, Inc. | Minot, ND 58702 | Oil & Gas Operator | Jul 2026 |
| 11 | Bensun Energy, LLC | Grandview, TX 76050 | Oil Operator | Aug 2020 |
| 12 | Berco Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 13 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2026 |
| 14 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Jul 2026 |
| 15 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2026 |
| 16 | Big Rose Colony, Inc. | Shelby, MT 59474 | Gas Operator | Jun 2026 |
| 17 | Big Sky Energy, LLC | Cody, WY 82414 | Oil & Gas Operator | May 2024 |
| 18 | Big Snowy Resources LP | Billings, MT 59105 | Oil Operator | Mar 2026 |
| 19 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 20 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 21 | Blackjack Oil, Inc. | Las Vegas, NV 89128 | Oil & Gas Operator | Nov 2019 |
| 22 | Blacksmith Oil Tools USA Inc. | Havre, MT 59501 | Gas Operator | Jun 2026 |
| 23 | Blackstone Operating | Red Lodge, MT 59068 | Gas Operator | Dec 2006 |
| 24 | Bluebird Energy, LLC | Billings, MT 59102 | Oil Operator | Jun 2026 |
| 25 | Bluebonnet Energy Corporation | Englewood, CO 80112 | Oil & Gas Operator | Sep 2015 |
| 26 | Bowers Oil & Gas, Inc. | Grand Junction, CO 81505-1097 | Oil & Gas Operator | Nov 2022 |
| 27 | Bowline Energy LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2022 |
| 28 | Brainstorm Energy, Inc. | Whitefish, MT 59937 | Oil & Gas Operator | Apr 2026 |
| 29 | Branch Oil & Gas | Shelby, MT 59474-0766 | Oil & Gas Operator | Jul 2010 |
| 30 | Branch, Jerry L. | | Oil & Gas Operator | Jul 1999 |
| 31 | Brandon Oil Company | Sunburst, MT 59482 | Oil & Gas Operator | Feb 2023 |
| 32 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 33 | Brighton Energy, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 34 | Briscoe Petroleum, LLC | Sheridan, WY 82801 | Oil & Gas Operator | Jul 2026 |
| 35 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 36 | Brooks Exploration Inc | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
| 37 | Brown, J. Burns Operating Co. | Havre, MT 59501 | Oil & Gas Operator | Jun 2026 |
| 38 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 39 | Buckley, Michael T. | Sweetgrass, MT 59484 | Oil & Gas Operator | Apr 2026 |
| 40 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2026 |