| 101 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 102 | Bowles Jack P F | Edmond, OK 73083-3285 | Oil & Gas Operator | Sep 2021 |
| 103 | Box Energy Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2003 |
| 104 | Boxie Oil Co | Asher, OK 74826-0243 | Oil & Gas Operator | Feb 2008 |
| 105 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 106 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2024 |
| 107 | Breitburn Operating, LP | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 108 | Breitling Operating Corporation | Dallas, TX 75201 | Oil & Gas Operator | Aug 2016 |
| 109 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 110 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 111 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Mar 2024 |
| 112 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 113 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 114 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 115 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 116 | Brooks E L | Edmond, OK 73034-6882 | Oil & Gas Operator | May 2009 |
| 117 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2024 |
| 118 | Brown & Borelli, Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | May 2024 |
| 119 | Brown Jeff J Dba Brown Service Co | Enid, OK 73702-1604 | Oil & Gas Operator | Mar 2024 |
| 120 | Bryant Joe | Helena, OK 73741 | Oil & Gas Operator | Apr 1998 |
| 121 | Buchanan Wayman W | San Antonio, TX 78212 | Oil & Gas Operator | Sep 1990 |
| 122 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2024 |
| 123 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 124 | Burlington Res Oil & Gas LP | | Oil & Gas Operator | Feb 2024 |
| 125 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 126 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 127 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Mar 2024 |
| 128 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 129 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 130 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2024 |
| 131 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 132 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Mar 2024 |
| 133 | C L & S Oil Company Inc | Perry, OK 73077-0841 | Oil & Gas Operator | Jan 2018 |
| 134 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 135 | Cactus Energy Company LLC | Hennessey, OK 73742-0698 | Oil & Gas Operator | Feb 2024 |
| 136 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 137 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2024 |
| 138 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2024 |
| 139 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 140 | Capstone Oil & Gas LLC | Hennessey, OK 73742-0698 | Oil & Gas Operator | Mar 2024 |
| 141 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 142 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 143 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2024 |
| 144 | Carl Humphries Inc | Piedmont, OK 73078-0514 | Oil & Gas Operator | Mar 2024 |
| 145 | Carla Energy Corporation | Oklahoma City, OK 73154-1487 | Oil & Gas Operator | Nov 2014 |
| 146 | Carmac Energy Corporation | Dallas, TX 75219-2311 | Oil & Gas Operator | Feb 2024 |
| 147 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2024 |
| 148 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 149 | CB Oil Company | Drumright, OK 74030-0176 | Oil & Gas Operator | Mar 2024 |
| 150 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 151 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Feb 2024 |
| 152 | Centaur Resources Inc | Oklahoma City, OK 73142-6804 | Oil & Gas Operator | Feb 2024 |
| 153 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 154 | Centurion Oil Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 1992 |
| 155 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Mar 2024 |
| 156 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2024 |
| 157 | Chapman Exploration Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2013 |
| 158 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2024 |
| 159 | Chermac Energy Corporation | Edmond, OK 73083-5446 | Oil & Gas Operator | Apr 2020 |
| 160 | Cherokee Royalties & Minerals Inc | Duncan, OK 73534-0415 | Oil & Gas Operator | Mar 2024 |
| 161 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2024 |
| 162 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 163 | Chisholm Oil And Gas Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 164 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jan 2024 |
| 165 | Choate Kenny Dba Rebound Oil Co | | Gas Operator | Mar 2024 |
| 166 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 167 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 168 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Feb 2024 |
| 169 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Mar 2024 |
| 170 | Citation Energy | | Oil & Gas Operator | Jul 1993 |
| 171 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2024 |
| 172 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 173 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 174 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 175 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2024 |
| 176 | Cogburn Oil Co Inc | | Oil & Gas Operator | Sep 2023 |
| 177 | Collet Oil Ventures, Inc. | Denver, CO 80217 | Oil & Gas Operator | Jun 2004 |
| 178 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 179 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 180 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | May 2024 |
| 181 | Compass Drilling Inc | Enid, OK 73702-5467 | Oil & Gas Operator | Sep 2014 |
| 182 | Compass Resources | Enid, OK 73702 | Oil & Gas Operator | Dec 2007 |
| 183 | Complete Energy Services LLC | Oklahoma City, OK 73142-3326 | Oil Operator | Aug 2022 |
| 184 | Condrin Oil 1985-A LTD | Tulsa, OK 74136 | Oil & Gas Operator | Nov 1998 |
| 185 | Confed Oil Incorporated | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 186 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 187 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 188 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 189 | Contango Resources LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 190 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2024 |
| 191 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2024 |
| 192 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 193 | Cooper Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 194 | Cordillera Energy Partners LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |
| 195 | Corlena Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | May 2024 |
| 196 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 197 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 198 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 199 | CRB Resources Inc | Newcastle, OK 73065-0594 | Oil & Gas Operator | Feb 2024 |
| 200 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |