| 1 | B & B SWD LLC | | Oil Operator | Jan 2024 |
| 2 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2024 |
| 3 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Apr 2024 |
| 4 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 5 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 6 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 7 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 8 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2024 |
| 9 | Be Anadarko LLC | | Oil & Gas Operator | Jan 2024 |
| 10 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 11 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 12 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Apr 2024 |
| 13 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 14 | Blackbeard Operating East, LLC | | Oil & Gas Operator | Dec 2020 |
| 15 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 16 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2024 |
| 17 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Jan 2024 |
| 18 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2024 |
| 19 | Bluemark Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2023 |
| 20 | Bluff LTD (The) Partnership | Woodward, OK 73801-3160 | Oil Operator | Dec 1999 |
| 21 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Dec 2023 |
| 22 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 23 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 24 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 25 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 26 | Bravo Natural Resources, Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 27 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 28 | Breitburn Operating, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 29 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | Jan 2024 |
| 30 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 31 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 32 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 33 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 34 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 35 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 36 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 37 | Buckelew Elise A Cowden | | Oil & Gas Operator | Sep 2022 |
| 38 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 39 | Burlington Res Oil & Gas LP | | Oil & Gas Operator | Dec 2023 |
| 40 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 41 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |