| 1 | B & H Oil Company | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 2 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Feb 2026 |
| 3 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Aug 2003 |
| 4 | Baruch Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 5 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 6 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 7 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 8 | Be Anadarko LLC | Wimberley, TX 78676-4418 | Oil & Gas Operator | Jan 2024 |
| 9 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 10 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 11 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 12 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 13 | Blackbeard Operating East LLC | Midland, TX 79701-4532 | Oil & Gas Operator | Dec 2020 |
| 14 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 15 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 16 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Dec 2025 |
| 17 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2026 |
| 18 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Nov 2025 |
| 19 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2025 |
| 20 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 21 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 22 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 23 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 24 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 25 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 26 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | Feb 2026 |
| 27 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | Oct 2025 |
| 28 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 29 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 30 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 31 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 32 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 33 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 34 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 35 | Brunar Exploration Company | Edmond, OK 73034 | Oil & Gas Operator | Mar 1997 |
| 36 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 37 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 38 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 39 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 40 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |