| 1 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Mar 2025 |
| 2 | B & B Resources | Tulsa, OK 74136-2655 | Oil & Gas Operator | Dec 2024 |
| 3 | B & C Drilling Company Inc | Holdenville, OK 74848-0961 | Oil & Gas Operator | Mar 2000 |
| 4 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 5 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Mar 2025 |
| 6 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2024 |
| 7 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 8 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 9 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2024 |
| 10 | Belco Development Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 1994 |
| 11 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 12 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 13 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 14 | Beta Oil Company Inc | Oklahoma City, OK 73157-2958 | Oil & Gas Operator | Dec 2022 |
| 15 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 16 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 17 | Bird Creek Oil Company | Tulsa, OK 74126 | Oil & Gas Operator | Dec 2000 |
| 18 | Bird Oil & Gas Inc | Yukon, OK 73099-2827 | Oil & Gas Operator | Jan 2023 |
| 19 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2024 |
| 20 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Mar 2025 |
| 21 | Bluemark Energy LLC | Tulsa, OK 74120 | Oil & Gas Operator | Nov 2024 |
| 22 | Boland Investment Company | Turpin, OK 73950-0375 | Oil & Gas Operator | Jan 2013 |
| 23 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 24 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 25 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 26 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Nov 2024 |
| 27 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 28 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2024 |
| 29 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 30 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Dec 2024 |
| 31 | Bright Horizon Resources LLC | Tulsa, OK 74136-4220 | Oil & Gas Operator | Sep 2016 |
| 32 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 33 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 34 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 35 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Nov 2024 |
| 36 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |