| 101 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 102 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 103 | Bracksieck Lloyd H | Boulder, CO 80303 | Oil & Gas Operator | Feb 2019 |
| 104 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Jan 2025 |
| 105 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 106 | Braxton Oil And Gas Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2021 |
| 107 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2025 |
| 108 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 109 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Jan 2025 |
| 110 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 111 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 112 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 113 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Feb 2025 |
| 114 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 115 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 116 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 117 | Brock Exploration Corporation | New Orleans, LA 70112-1707 | Oil & Gas Operator | Jan 1999 |
| 118 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 119 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 120 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2025 |
| 121 | Brown Gary E | Tecumseh, OK 74873-0355 | Oil & Gas Operator | Aug 2015 |
| 122 | Brown Vernon L & Bonita | Cleveland, OK 74020-4426 | Oil & Gas Operator | Apr 2009 |
| 123 | Bso Inc | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 124 | Buckelew Elise A Cowden | | Oil & Gas Operator | Sep 2022 |
| 125 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 126 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 127 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Jan 2025 |
| 128 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |
| 129 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 130 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 131 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 132 | C & S Exploration Inc | | Oil & Gas Operator | Jun 2016 |
| 133 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Feb 2025 |
| 134 | C&D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Jan 2025 |
| 135 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 136 | Cabot Petroleum Corporation | Englewood, CO 80111-2529 | Oil & Gas Operator | Dec 2004 |
| 137 | Cactus Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Aug 2000 |
| 138 | Cactus Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2000 |
| 139 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 140 | Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 141 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 142 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Feb 2025 |
| 143 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Dec 2024 |
| 144 | Capturepoint LLC | Allen, TX 75013 | Oil & Gas Operator | Apr 2025 |
| 145 | Carter E W Oil Co Inc | Hominy, OK 74035 | Oil & Gas Operator | Jan 2025 |
| 146 | Caspen Oil, Inc. | Denver, CO 80226 | Oil & Gas Operator | Jul 1993 |
| 147 | CB Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Jan 2025 |
| 148 | Cenergy Exploration Company | Dallas, TX 75231 | Oil & Gas Operator | Sep 2000 |
| 149 | Central Crude Corp. | Wichita, KS 67206 | Oil Operator | Jan 2024 |
| 150 | Central Resources Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2019 |
| 151 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 152 | Centurion Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 153 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Feb 2025 |
| 154 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 155 | Chatham John | Wilson, OK 73463-9575 | Oil Operator | Feb 2014 |
| 156 | Chesapeake Energy MKT Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2022 |
| 157 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2025 |
| 158 | Chester Oil Company | Wetumka, OK 74883-6227 | Oil & Gas Operator | Feb 2025 |
| 159 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 160 | Chockley Energy LLC | Beaver, OK 73932 | Gas Operator | Jan 2025 |
| 161 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 162 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 163 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 164 | Cimarron Petroleum Corporation | Houston, TX 77057-2696 | Oil & Gas Operator | Jan 2025 |
| 165 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 166 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 167 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 168 | Cities Services Company | | Oil & Gas Operator | Mar 2008 |
| 169 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 170 | Claassen Oil And Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Dec 2024 |
| 171 | Claremont Corporation | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2017 |
| 172 | Claremont Exploration Inc | Tulsa, OK 74103-4107 | Oil & Gas Operator | Jun 1997 |
| 173 | Clayton Corp Petro & Natural Gas Prod | Lakewood, CO 80228-1836 | Oil & Gas Operator | Oct 2020 |
| 174 | Clayton Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 175 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 176 | CMS Energy Inc | Dallas, TX 75287 | Oil & Gas Operator | Jan 2025 |
| 177 | CNR Resources, Inc. | Houston, TX 77002-4103 | Oil & Gas Operator | May 2005 |
| 178 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 179 | Coastal Oils Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2013 |
| 180 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |
| 181 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 182 | Colorado Interstate Gas Co | Colorado Springs, CO 80944 | Oil & Gas Operator | Jul 2004 |
| 183 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 184 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 185 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 186 | Combined Resources Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2025 |
| 187 | Comstock Oil & Gas, LP | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 188 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 189 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 190 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 191 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |
| 192 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Apr 2025 |
| 193 | Continental Gas Inc | Enid, OK 73702-5103 | Oil & Gas Operator | Apr 2012 |
| 194 | Continental Natural Gas, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2018 |
| 195 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 196 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2025 |
| 197 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 198 | Cooper Operating LLC | Yukon, OK 73099 | Oil & Gas Operator | Feb 2025 |
| 199 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Jan 2025 |
| 200 | Cordillera Energy Partners, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2020 |