| 1 | B & B Oil Company LTD | | Gas Operator | Mar 2020 |
| 2 | Baney Well Service Inc | Denver, CO 80237 | Oil Operator | Dec 2015 |
| 3 | Barrett Corporation* Bill | | Oil & Gas Operator | Sep 2025 |
| 4 | Bataa Oil Inc | Arvada, CO 80005 | Oil & Gas Operator | Oct 2025 |
| 5 | Bates* James Edward | | Oil & Gas Operator | Jul 2017 |
| 6 | Bayless Producer LLC* Robert L | | Oil & Gas Operator | Sep 2025 |
| 7 | Bayswater Exploration & Production LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 8 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | Oct 2025 |
| 9 | Becca Oil LLC | Cushing, OK 74023-1347 | Oil & Gas Operator | Aug 2025 |
| 10 | Beeman Oil & Gas LLC | | Oil & Gas Operator | Oct 2025 |
| 11 | Behrens Resources Inc | | Oil & Gas Operator | Jul 2019 |
| 12 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 13 | Benson-Montin-Greer DRLG Corp | Farmington, NM 87402 | Oil & Gas Operator | Oct 2025 |
| 14 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 15 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Oct 2025 |
| 16 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 17 | Berry Energy Inc*Walter | | Oil & Gas Operator | Aug 2016 |
| 18 | Berry Petroleum Company LLC | Bakersfield, CA 93311 | Oil & Gas Operator | Oct 2025 |
| 19 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 20 | Bison IV Operating LLC | | Oil & Gas Operator | Oct 2025 |
| 21 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 22 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 23 | Blackrock Energy Corp | | Oil & Gas Operator | Sep 2025 |
| 24 | Blue Chip Oil Inc | | Oil & Gas Operator | Oct 2025 |
| 25 | Blue Creek Inc | Fort Worth, TX 76181 | Oil & Gas Operator | Jul 2002 |
| 26 | Bluestone Natural Resources II LLC | | Oil & Gas Operator | Mar 2017 |
| 27 | Bonanza Creek Energy Operating Company LLC | | Oil & Gas Operator | Sep 2025 |
| 28 | Booco'S Contract Services Inc | | Oil & Gas Operator | Jan 2021 |
| 29 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 30 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 31 | Brooks Exploration Inc | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
| 32 | Brown Oil & Gas LLC | | Oil & Gas Operator | Sep 2025 |
| 33 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 34 | Burr Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Oct 2019 |
| 35 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |