| 1 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 2 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 3 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 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 | Oct 2025 |
| 7 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 8 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 9 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Oct 2025 |
| 10 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 11 | Bird Oil & Gas Inc | Yukon, OK 73099-2827 | Oil & Gas Operator | Jan 2023 |
| 12 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 13 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 14 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Jun 2025 |
| 15 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jun 2025 |
| 16 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jul 2025 |
| 17 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 18 | Bo-MC Operating Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Mar 2018 |
| 19 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | May 2025 |
| 20 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Jul 2025 |
| 21 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 22 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 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 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 26 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 27 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 28 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 29 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 30 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | Jul 2025 |
| 31 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 32 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 33 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 34 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 35 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 36 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 37 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 38 | Britt Oil Company LLC | Shawnee, OK 74801-9613 | Oil & Gas Operator | Jun 2025 |
| 39 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 40 | Burlington Oil Company | Ponca City, OK 74602-1304 | Oil & Gas Operator | May 2007 |
| 41 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 42 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 43 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 44 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 45 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Oct 2025 |