| 101 | Bso Inc | Cleveland, OK 74020 | Oil & Gas Operator | May 2025 |
| 102 | Buck Creek Associates | Bartlesville, OK 74006 | Oil & Gas Operator | May 2013 |
| 103 | Buck Creek Associates LLC | Bartlesville, OK 74005-2091 | Oil Operator | Sep 2009 |
| 104 | Buck Enterprises LLC | Oklahoma City, OK 73150-6111 | Oil Operator | Apr 2025 |
| 105 | Bullard Don W | Ardmore, OK 73401-3646 | Oil & Gas Operator | Dec 2019 |
| 106 | Bullard Oil Company LLC | Tuttle, OK 73089-8375 | Oil Operator | Aug 2024 |
| 107 | Buntin Ronnie | Maramec, OK 74045-4500 | Oil & Gas Operator | Sep 2019 |
| 108 | Burrows, Dewey | | Oil & Gas Operator | Apr 2025 |
| 109 | Butler, Cecil D | | Oil & Gas Operator | Apr 2025 |
| 110 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 111 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Jul 2025 |
| 112 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2025 |
| 113 | C & T Energy Co | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2004 |
| 114 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | May 2025 |
| 115 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 116 | Cable W S | Cleveland, OK 74020 | Oil Operator | Jan 2021 |
| 117 | Cabot Exploration Corp | Houston, TX 77070 | Oil Operator | Jun 1999 |
| 118 | Calgary Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2025 |
| 119 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 120 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | May 2025 |
| 121 | Cape Oil Associates | | Oil & Gas Operator | Sep 1997 |
| 122 | Capital Programs Company Inc | Addison, TX 75001-6030 | Oil Operator | Jul 2021 |
| 123 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Jul 2025 |
| 124 | Cardinal River Operating LLC | Oklahoma City, OK 73102-7109 | Oil & Gas Operator | Apr 2025 |
| 125 | Carman C Wilford | | Oil & Gas Operator | Jan 2007 |
| 126 | Carman Frances J | Pawhuska, OK 74056-0101 | Oil & Gas Operator | Aug 2013 |
| 127 | Carman Robert W | Bristow, OK 74010-3454 | Oil & Gas Operator | Apr 2025 |
| 128 | Carnes Crude Oil Reclaiming Industry | | Oil Operator | Dec 2019 |
| 129 | Carpenter Luther | Skiatook, OK 74070-9124 | Oil & Gas Operator | Mar 2025 |
| 130 | Cartledge & Cartledge Oil Company Inc | Kiefer, OK 74041 | Oil & Gas Operator | May 2025 |
| 131 | Cartledge Energy LLC | Sapulpa, OK 74066-6623 | Oil & Gas Operator | May 2025 |
| 132 | Case Sales Company Inc | Tonkawa, OK 74653-0040 | Oil & Gas Operator | Apr 2025 |
| 133 | Casey, Carl D | | Oil Operator | Sep 2024 |
| 134 | Cassidy Jr John | Stroud, OK 74079-0200 | Oil & Gas Operator | Nov 2014 |
| 135 | Castella Inc | Bartlesville, OK 74003-3712 | Oil & Gas Operator | May 2025 |
| 136 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 137 | Central California Oil Co. | Fish Camp, CA 93623 | Oil & Gas Operator | May 2025 |
| 138 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 139 | Cep Mid-Continent LLC | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2025 |
| 140 | Chambers & Hendrix Oil & Gas | Skiatook, OK 74070-0726 | Oil & Gas Operator | Aug 2022 |
| 141 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 142 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 143 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 144 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 145 | Chinn, Larry A | | Oil & Gas Operator | Apr 2025 |
| 146 | Chinn, Larry E | | Oil & Gas Operator | Apr 2025 |
| 147 | Chinn, Velma D | | Oil Operator | Mar 2015 |
| 148 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 149 | Circle K Oil & Gas Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Apr 2025 |
| 150 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 151 | Clapp Carl O | Cedar Vale, KS 67024 | Oil Operator | Aug 2013 |
| 152 | Class Petroleum Corporation | Barnsdall, OK 74002 | Oil Operator | Aug 2013 |
| 153 | Clear Creek Royalty LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2023 |
| 154 | Clemishire Don | Hominy, OK 74035 | Oil & Gas Operator | May 2025 |
| 155 | Clemishire, Brian S | | Oil & Gas Operator | Nov 2014 |
| 156 | Clemishire, Jerry L | | Oil & Gas Operator | Apr 2025 |
| 157 | Clemishire, Mark E | | Oil Operator | Apr 2025 |
| 158 | Clemshire Bob | Hominy, OK 74035 | Oil & Gas Operator | Apr 2025 |
| 159 | Clemshire Drilling Company | Tulsa, OK 74105 | Oil Operator | Apr 2025 |
| 160 | Clifton & Associates Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2020 |
| 161 | Cmo LLC | Cleveland, OK 74020 | Oil & Gas Operator | Apr 2025 |
| 162 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Apr 2025 |
| 163 | CN Operating Company | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 164 | Coast David | Bartlesville, OK 74006-0407 | Oil & Gas Operator | Apr 2025 |
| 165 | Collins, Stephen M | | Oil Operator | Apr 2025 |
| 166 | Colonial Energy Company Inc | Garland, TN 75045 | Oil & Gas Operator | Apr 2015 |
| 167 | Colpitt C H Drilling Co LLC | Collinsville, OK 74021-7107 | Oil Operator | Apr 2025 |
| 168 | Colpitt Chas H Drilling Co | Collinsville, OK 74021-7105 | Oil & Gas Operator | Mar 2012 |
| 169 | Comanche Oil And Service, LLC | | Oil Operator | Apr 2025 |
| 170 | Condrin Oil 1985-A LTD | Tulsa, OK 74136 | Oil & Gas Operator | Nov 1998 |
| 171 | Conklin Robert L Dba Conklin Oil LLC | Tulsa, OK 74153 | Oil Operator | Apr 2025 |
| 172 | Conley, John | | Oil Operator | Aug 2000 |
| 173 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 174 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 175 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 176 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Jul 2025 |
| 177 | Continental Oil & Refining Co | Catoosa, OK 74015-0831 | Oil & Gas Operator | Nov 2024 |
| 178 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 179 | Cooper A L & Mae C | | Oil & Gas Operator | Jan 2001 |
| 180 | Cooper John T | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 181 | Cooper Oil Inc | Duncan, OK 73534 | Oil & Gas Operator | Sep 2014 |
| 182 | Corley G R | | Oil & Gas Operator | Jun 2009 |
| 183 | Cornelius, Steven L | | Oil Operator | Sep 2015 |
| 184 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 185 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Apr 2025 |
| 186 | Cougar Oil | | Oil Operator | Feb 2025 |
| 187 | Coughlin, Daniel L | | Oil Operator | Aug 2000 |
| 188 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 189 | Craft & Craft Productions LLC | | Oil Operator | Mar 2025 |
| 190 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 191 | CRM Energy Partners | | Oil & Gas Operator | Apr 2025 |
| 192 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 193 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 194 | Crude Oil Recovery Inc /Osage Only | | Oil & Gas Operator | Mar 2006 |
| 195 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 196 | D & F Oil Company | Dewey, OK 74029 | Oil & Gas Operator | Apr 2001 |
| 197 | D & P Tank Service, Inc. | | Oil Operator | Mar 2000 |
| 198 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 199 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Jul 2025 |
| 200 | D-B-K Operating Company | | Oil Operator | Jan 2006 |