| 1 | B & B SWD LLC | | Oil Operator | Feb 2024 |
| 2 | B & F Enterprises | Ada, OK 74820 | Oil & Gas Operator | Feb 2002 |
| 3 | B & W Operating LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2024 |
| 4 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2021 |
| 5 | Bannon Operating Inc | Houston, TX 77068 | Oil & Gas Operator | Sep 2003 |
| 6 | Barby Energy Corporation | Woodward, OK 73802-1660 | Oil & Gas Operator | Jan 2024 |
| 7 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 8 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 9 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 10 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2024 |
| 11 | Beasley Oil Company | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2020 |
| 12 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 13 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 14 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 15 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 16 | Below Ground Level LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Apr 2024 |
| 17 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Apr 2024 |
| 18 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Apr 2024 |
| 19 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 20 | Bird Creek Oil Company | Tulsa, OK 74126 | Oil & Gas Operator | Dec 2000 |
| 21 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 22 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2024 |
| 23 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2024 |
| 24 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2024 |
| 25 | Bluemark Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2024 |
| 26 | Bluff LTD (The) Partnership | Woodward, OK 73801-3160 | Oil Operator | Dec 1999 |
| 27 | BNK Petroleum (Us) Inc | Thousand Oaks, CA 91320-1272 | Oil & Gas Operator | Feb 2024 |
| 28 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Jan 2024 |
| 29 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Feb 2024 |
| 30 | Bond Drilling Company | Marietta, OK 73448-0372 | Oil & Gas Operator | Apr 2017 |
| 31 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 32 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 33 | Bravo Natural Resources, Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 34 | Braxton Oil And Gas Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2021 |
| 35 | Breitburn Operating, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 36 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 37 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 38 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2023 |
| 39 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 40 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 41 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 42 | Brittany Energy LLC | San Antonio, TX 78209-0127 | Oil & Gas Operator | May 2019 |
| 43 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 44 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 45 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 46 | Brunsteter Dick Oil & Gas Inc | Alva, OK 73717-0068 | Oil & Gas Operator | Jul 2006 |
| 47 | Buck Production Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Sep 2023 |
| 48 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 49 | Burlington Res Oil & Gas LP | | Oil & Gas Operator | Jan 2024 |
| 50 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 51 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |