| 101 | Beartooth Oil & Gas Company | Billings, MT 59103 | Oil & Gas Operator | May 2025 |
| 102 | Beaver Oil Company, A General Partnership | Beaver, OK 73792 | Gas Operator | Aug 2022 |
| 103 | Beaver Unit (The) | Great Bend, KS 67530 | Oil Operator | Jul 1989 |
| 104 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 105 | Becker Oil Corpo | | Oil & Gas Operator | Dec 1996 |
| 106 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Apr 2025 |
| 107 | Becker, Clyde M. | Ponca City, OK 74601 | Oil & Gas Operator | Oct 2009 |
| 108 | Becker, Lavern | Russell, KS 67665 | Oil Operator | Oct 1995 |
| 109 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 110 | Bell Brothers | | Oil Operator | Mar 2025 |
| 111 | Bell Oil Company | | Oil & Gas Operator | Oct 1985 |
| 112 | Bellmyer, Fred L | Caney, KS 67333 | Oil Operator | May 1997 |
| 113 | Bellnorth Petrol | | Oil Operator | Aug 1986 |
| 114 | Belport Oil, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2025 |
| 115 | Bemco, LLC | Medicine Lodge, KS 67104 | Oil Operator | Mar 2025 |
| 116 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 117 | Benchmark Oil & | | Oil Operator | Dec 1996 |
| 118 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 119 | Bengalia Land And Cattle Company | Tulsa, OK 74152 | Oil & Gas Operator | Feb 2025 |
| 120 | Bengston Oil, LLC | Windom, KS 67491 | Oil Operator | Aug 2024 |
| 121 | Bengtson, Earl L. | Salina, KS 67401 | Oil Operator | Mar 2007 |
| 122 | Bennett & Schult | | Oil Operator | Jul 1995 |
| 123 | Bennett & Schulte Oil Co., A General Partnership | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 124 | Bennett Oil Comp | | Oil Operator | Mar 1992 |
| 125 | Bennett Oil Company, LLC | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 126 | Benson Mineral G | | Oil & Gas Operator | Dec 1995 |
| 127 | Benson Mineral Group Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 128 | Bentley & Laing | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2002 |
| 129 | Bentley Oil & Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 130 | Berco Oil Co., A General Partnership | Buffalo, KS 66717 | Oil & Gas Operator | Dec 2024 |
| 131 | Beredco Incorpor | | Oil & Gas Operator | Dec 1993 |
| 132 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 133 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 134 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Jun 2025 |
| 135 | Berentz Drilling | | Oil Operator | Jul 1995 |
| 136 | Berentz Drilling Co., Inc. | Wichita, KS 67278 | Oil Operator | Mar 2025 |
| 137 | Berexco Inc. | Wichita, KS 67208 | Oil & Gas Operator | Oct 2009 |
| 138 | Berexco Incorpor | | Oil & Gas Operator | Dec 1996 |
| 139 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 140 | Bergman Oil Co., L.C. | Wichita, KS 67202 | Oil Operator | Sep 2007 |
| 141 | Bergman Oil Comp | | Oil Operator | Mar 1995 |
| 142 | Bergman, Anna F. Trust, A General Partnership | Shawnee, KS 66203 | Oil Operator | Nov 2019 |
| 143 | Berky Resources | | Oil & Gas Operator | Sep 1994 |
| 144 | Berry Petroleum Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2014 |
| 145 | Beymer & Beymer | | Gas Operator | Dec 2009 |
| 146 | BG-5, Inc. | Rantoul, KS 66079 | Oil Operator | Mar 2025 |
| 147 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 148 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 149 | Bibs Oil Corpora | | Oil & Gas Operator | Apr 1987 |
| 150 | Bickle Energies LLC | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 151 | Bieberle Oil & Gas Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Mar 2025 |
| 152 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 153 | Big 'O' | | Oil Operator | Mar 2025 |
| 154 | Big B Oil Company, LLC | Hays, KS 67601 | Oil Operator | Feb 2025 |
| 155 | Big Bear Resourc | | Oil Operator | Jan 1989 |
| 156 | Big Eight Energy | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 157 | Big Eight Energy, L.L.C. | Wichita, KS 67275 | Oil Operator | Dec 2009 |
| 158 | Big Horn Oil Co., Inc. | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 159 | Big Jack Oil & G | | Oil Operator | Sep 1986 |
| 160 | Big Sky Gas Co. | Tribune, KS 67879 | Gas Operator | Dec 2001 |
| 161 | Big Ticket, LLC | Lawrence, KS 66047 | Oil Operator | Mar 2025 |
| 162 | Biggy'S Petroleum | | Oil & Gas Operator | Dec 2024 |
| 163 | Bill Gallagher Enterprises LLC | Newport Beach, CA 92663 | Gas Operator | Jan 2016 |
| 164 | Billips Trust - | | Oil Operator | Nov 1996 |
| 165 | Billy Oil Incorp | | Oil & Gas Operator | Nov 1991 |
| 166 | Bird & Hanley | | Oil Operator | Dec 1993 |
| 167 | Bird Dog Oil, LLC | Denver, CO 80202 | Oil Operator | Mar 2025 |
| 168 | Bird Energy Inco | | Oil & Gas Operator | Mar 1993 |
| 169 | Bird Enterprises | | Oil Operator | Feb 2002 |
| 170 | Birk Edward E | | Oil Operator | Dec 2009 |
| 171 | Birk Petroleum | | Oil Operator | Mar 2025 |
| 172 | Birk, Linda | Burlington, KS 66839 | Oil Operator | Mar 2025 |
| 173 | Birmingham-Bartl | | Oil Operator | Aug 1994 |
| 174 | Biron Incorporat | | Oil Operator | Aug 1989 |
| 175 | Bisbee Gas & Oil | | Oil & Gas Operator | Mar 1995 |
| 176 | Bisbee Oil And Gas Co., Inc. | Kansas City, MO 64106 | Oil & Gas Operator | Dec 2009 |
| 177 | Bishop Oil & Exp | | Oil Operator | Dec 1988 |
| 178 | Bishop, Charlus J. | Kingman, KS 67068 | Oil Operator | Sep 1997 |
| 179 | Bison Energy Cor | | Oil & Gas Operator | Aug 1995 |
| 180 | Bison Energy Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2022 |
| 181 | Bitter Spar LLC | Wichita, KS 67226 | Oil & Gas Operator | Mar 2025 |
| 182 | BJ Oil | Burlington, KS 66839 | Oil Operator | Mar 2012 |
| 183 | Black & White Oper. | Thayer, KS 66776 | Oil Operator | Aug 1998 |
| 184 | Black Dahlia Oil & Gas Co. | Glendale, CA 91208 | Oil Operator | Feb 2025 |
| 185 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 186 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 187 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 188 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 189 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 190 | Black Gold Well Service, Inc. | Towanda, KS 67144 | Oil Operator | Dec 2019 |
| 191 | Black Hawk Petro | | Oil Operator | Dec 1993 |
| 192 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Mar 2025 |
| 193 | Black Petroleum | | Oil Operator | Sep 1989 |
| 194 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 195 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 196 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Jul 2025 |
| 197 | Black Spot Oil Company, A General Partnership | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 198 | Black Star Petro | | Oil Operator | Jul 1995 |
| 199 | Black Star Petroleum Corp. | Oceanside, NY 11572 | Oil Operator | Oct 1997 |
| 200 | Black Stone Petroleum LLC | Wichita, KS 67206 | Oil Operator | Jul 2019 |