| 101 | Bullard Oil Company LLC | Tuttle, OK 73089-8375 | Oil Operator | Aug 2024 |
| 102 | Bullards Oilfield Service Inc | Ardmore, OK 73401-3646 | Oil Operator | Sep 1999 |
| 103 | Burrows, Dewey | | Oil & Gas Operator | Feb 2025 |
| 104 | Burton Oil Properties | Ratliff City, OK 73081 | Oil & Gas Operator | Feb 2025 |
| 105 | Busey Naman | Elmore City, OK 73433-9583 | Oil & Gas Operator | Dec 2024 |
| 106 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 107 | Butkin Oil Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2023 |
| 108 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 109 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Mar 2025 |
| 110 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 111 | C & R Petroleum Co. | Duncan, OK 73533-1341 | Oil & Gas Operator | Feb 2025 |
| 112 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 113 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Mar 2025 |
| 114 | Cain Randy A | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 115 | Cain Richard | Comanche, OK 73529-1248 | Oil & Gas Operator | May 2020 |
| 116 | Calumet Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2019 |
| 117 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 118 | Camp Dennis | Ratliff City, OK 73081 | Oil & Gas Operator | Nov 2018 |
| 119 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 120 | Cantrell Energy Corporation | Ada, OK 74820-0835 | Oil & Gas Operator | Feb 2025 |
| 121 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 122 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 123 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2025 |
| 124 | Carter County Salt Water Disposal Inc | Wilson, OK 73463 | Oil Operator | Jan 2025 |
| 125 | Carter Preston Drilling Co | Davis, OK 73030 | Gas Operator | Nov 2000 |
| 126 | Casillas Operating LLC | Tulsa, OK 74103-4060 | Oil & Gas Operator | Mar 2025 |
| 127 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Mar 2025 |
| 128 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 129 | Cathey Production Company | Ryan, OK 73565-0485 | Oil Operator | Dec 2010 |
| 130 | Caulkins Oil Company | Aztec, NM 87410 | Oil & Gas Operator | Oct 2024 |
| 131 | Cement Oil Company | Cement, OK 73017-9234 | Oil & Gas Operator | Mar 2025 |
| 132 | Centrex Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2025 |
| 133 | Chapman Oil Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 134 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 135 | Chatham John | Wilson, OK 73463-9575 | Oil Operator | Feb 2014 |
| 136 | Chatham Verdell | Ratliff City, OK 73081-0061 | Oil Operator | Oct 2009 |
| 137 | Chatham VIckie R | Wilson, OK 73463 | Oil Operator | Feb 2025 |
| 138 | Chatham, Maxine | | Oil Operator | Oct 2016 |
| 139 | Cherokee Royalties & Minerals Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2025 |
| 140 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 141 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 142 | Chica Oil Company | Lago VIsta, TX 78645-6561 | Oil & Gas Operator | Mar 2001 |
| 143 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 144 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 145 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2025 |
| 146 | Citizen Energy III LLC | Devner, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 147 | Clark And Clark | Princeton, NJ 08540-1930 | Oil & Gas Operator | Jul 2013 |
| 148 | Cobalt Environmental Solutions LLC | Oklahoma City, OK 73101-0249 | Oil Operator | Jun 2019 |
| 149 | Coho Oil & Gas Inc | Coppell, TX 75019-8288 | Oil & Gas Operator | Mar 2015 |
| 150 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 151 | Command Energy Operating LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 152 | Complete Energy Services LLC | Gainesville, TX 76240 | Oil Operator | Aug 2022 |
| 153 | Concho Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2015 |
| 154 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 155 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 156 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 157 | Corley Production Company | Wilson, OK 73463-7218 | Oil Operator | Mar 2025 |
| 158 | Corley Production Inc | Comanche, OK 73529-4668 | Oil Operator | Mar 2015 |
| 159 | Corner Energy LLC | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Mar 2015 |
| 160 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 161 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 162 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 163 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Mar 2025 |
| 164 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 165 | Cox Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 166 | CPRP Services LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Feb 2025 |
| 167 | CRD Investments LLC | Duncan, OK 73533-4226 | Oil Operator | Mar 2025 |
| 168 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 169 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 170 | Crusader Energy Group Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 2015 |
| 171 | Crusader Energy Group LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2015 |
| 172 | Crusader Energy III LLC | Oklahoma City, OK 73142-1856 | Oil & Gas Operator | Feb 2011 |
| 173 | D & B Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 174 | D & D Pipe & Equipment Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2005 |
| 175 | D & F Oil Company | Dewey, OK 74029 | Oil & Gas Operator | Apr 2001 |
| 176 | D & M Production Co Inc | Drumright, OK 74030 | Oil & Gas Operator | Jan 2025 |
| 177 | D & S Operating | Texhoma, OK 73949 | Oil & Gas Operator | May 2001 |
| 178 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 179 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | May 2025 |
| 180 | Dalcor Energy LLC | Duncan, OK 73534 | Oil & Gas Operator | Mar 2025 |
| 181 | Dale George | Elmore City, OK 73433 | Oil & Gas Operator | Aug 2022 |
| 182 | Dale Jimmy | Davis, OK 73030 | Oil & Gas Operator | Mar 2015 |
| 183 | Dales Tank Truck Service Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 184 | Daube Company The | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2025 |
| 185 | Daube Exploration Company | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2020 |
| 186 | Davis & Hamilton Oil Company | Edmond, OK 73083-3670 | Oil Operator | Aug 2022 |
| 187 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 188 | Davis, William H. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 189 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | May 2025 |
| 190 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 191 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 192 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2025 |
| 193 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 194 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 195 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 196 | Dennis Don Oil Company | Grady, OK 73569-9998 | Oil Operator | Jan 2002 |
| 197 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 198 | Dette Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2015 |
| 199 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 200 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |