| 201 | Derae Oil Company | Seminole, OK 74868-2617 | Oil & Gas Operator | Feb 1997 |
| 202 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 203 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 204 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2025 |
| 205 | Diamond Production Company LLC | Irving, TX 75016-7853 | Oil & Gas Operator | Dec 2024 |
| 206 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Feb 2025 |
| 207 | Dildine Oil Well Service | | Oil Operator | Apr 2011 |
| 208 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 209 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 210 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 211 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 212 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Feb 2025 |
| 213 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jan 2025 |
| 214 | Duncan Oil & Gas Inc | Norman, OK 73072 | Oil & Gas Operator | Sep 2020 |
| 215 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 216 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 217 | Eagle Resources Inc | Claremore, OK 74019-5398 | Oil & Gas Operator | May 2013 |
| 218 | Eagle Road Oil LLC | Tulsa, OK 74103-3312 | Oil & Gas Operator | Jan 2025 |
| 219 | Eastern Oilwell Cement Co Inc | Seminole, OK 74818-1704 | Oil & Gas Operator | Aug 2008 |
| 220 | Eastex Energy LLC | Shawnee, OK 74804 | Oil Operator | Jan 2025 |
| 221 | Eddie'S Submersible Service Inc | Shawnee, OK 74801-5047 | Oil & Gas Operator | Mar 2015 |
| 222 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 223 | Edwards Oil & Gas Company | Oklahoma City, OK 73156-0386 | Oil & Gas Operator | Mar 2015 |
| 224 | Ekg Operating Inc | Seminole, OK 74818-1028 | Oil & Gas Operator | Nov 2015 |
| 225 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 226 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2025 |
| 227 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Feb 2025 |
| 228 | Elliott Resources Inc | Ada, OK 74820-9227 | Oil & Gas Operator | Jul 2010 |
| 229 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 230 | Enerco Energy Corporation | Norman, OK 73069-6643 | Oil & Gas Operator | Apr 2020 |
| 231 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 232 | Energy Environment Inc | Holdenville, OK 74848-0765 | Oil & Gas Operator | Jul 2016 |
| 233 | Energy Production Services LLC | Oklahoma City, OK 73162-4736 | Oil & Gas Operator | Apr 2020 |
| 234 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2025 |
| 235 | Enersource Royalty Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2013 |
| 236 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 237 | Ennis Bill H | Sasakwa, OK 74867-0001 | Oil & Gas Operator | Sep 2014 |
| 238 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 239 | Equity Drilling Company Inc | Dewey, OK 74029 | Oil & Gas Operator | Nov 1998 |
| 240 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 241 | Eubank Operating Company | Cushing, OK 74023 | Oil & Gas Operator | Aug 2024 |
| 242 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 243 | Express Oil & Gas LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2025 |
| 244 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 245 | Eyler Dean E | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 246 | Fairfield Oil & Gas Corp | Edmond, OK 73083 | Oil & Gas Operator | Nov 2021 |
| 247 | Fairview Production Co LLC | Davis, OK 73030 | Oil & Gas Operator | Feb 2025 |
| 248 | Farmers Energy Corporation | Tulsa, OK 74103-3525 | Oil & Gas Operator | Nov 2021 |
| 249 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 250 | Fears George E | | Oil & Gas Operator | Mar 2019 |
| 251 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 252 | Fell Oil And Gas Inc | Tulsa, OK 74157-9487 | Oil & Gas Operator | Aug 2016 |
| 253 | Flagin Operating LLC | Norman, OK 73072-2405 | Oil & Gas Operator | Jan 2025 |
| 254 | Fleet Frank T | Ada, OK 74821-0729 | Oil & Gas Operator | Feb 2003 |
| 255 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 256 | FP Operations, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jan 2025 |
| 257 | Frank T Fleet Inc | Ada, OK 74820 | Oil Operator | Jan 2025 |
| 258 | Freedom Operating Company LLC | Tulsa, OK 74136-6834 | Oil & Gas Operator | Feb 2025 |
| 259 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 260 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | Feb 2025 |
| 261 | Galt Investment Company LLC | Tulsa, OK 74120-7412 | Oil Operator | Jun 2024 |
| 262 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Jan 2025 |
| 263 | Gatewood Edward J "Bob" | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 264 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Feb 2025 |
| 265 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 266 | General Trading Co Inc | Carrollton, TX 75011-2309 | Oil Operator | Jul 2017 |
| 267 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 268 | Genesis Petroleum Corp. | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 269 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 270 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 271 | Gilco Oil Inc | Ada, OK 74820 | Oil & Gas Operator | May 2019 |
| 272 | Gillham Paul | Maud, OK 74854 | Oil & Gas Operator | Apr 2023 |
| 273 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Feb 2025 |
| 274 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 275 | Glenco Oil & Gas Corporation | Wewoka, OK 74884-0727 | Oil & Gas Operator | Sep 2021 |
| 276 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2025 |
| 277 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 278 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Feb 2025 |
| 279 | Good Vaughn Oil Company LLC | Enid, OK 73702-3744 | Oil & Gas Operator | Jun 2019 |
| 280 | Goodnight & Laird | St Louis, OK 74866 | Oil & Gas Operator | Jan 2025 |
| 281 | Goodrich Larkin M | Konawa, OK 74849-9766 | Oil Operator | Jan 2013 |
| 282 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 283 | Gouker & Harris | Meeker, OK 74855-0685 | Oil Operator | Jan 2013 |
| 284 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2025 |
| 285 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 286 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Jan 2025 |
| 287 | Grayson Operating LLC | Ada, OK 74820 | Oil & Gas Operator | Jan 2025 |
| 288 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 289 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 290 | Green'S Drillng & Mud Ser Inc | Konawa, OK 74849 | Oil Operator | Jan 2013 |
| 291 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Jan 2025 |
| 292 | Griffin Well Service Inc | Konawa, OK 74849-9710 | Oil & Gas Operator | Jan 2025 |
| 293 | Gugli Corporation | Byng, OK 74820 | Oil & Gas Operator | Sep 2014 |
| 294 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2025 |
| 295 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 296 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 297 | H-Petro-R Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2024 |
| 298 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 299 | Hall Resources Corporation | Independence, MO 64057-2158 | Oil & Gas Operator | Jun 2016 |
| 300 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |