| 201 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2024 |
| 202 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 203 | Dana Petroleum Inc | Salt Lake City, UT 84047 | Oil & Gas Operator | Nov 1998 |
| 204 | Dance Oil Co | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 205 | Darnell Bobby J | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Feb 2024 |
| 206 | Daube Company The | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2024 |
| 207 | Daube Exploration Company | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2020 |
| 208 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 209 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 210 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Apr 2024 |
| 211 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 212 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 213 | Delong Oil & Gas Serv Inc | Drumright, OK 74030-0591 | Oil & Gas Operator | Nov 2023 |
| 214 | Deminex U.S. Oil Company | | Oil & Gas Operator | Jan 1998 |
| 215 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 216 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 217 | Dilley Corp | Yale, OK 74085 | Oil & Gas Operator | May 2013 |
| 218 | Dinsmore C E | Enid, OK 73702 | Oil & Gas Operator | May 2009 |
| 219 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 220 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 221 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 222 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Dec 2023 |
| 223 | Domac Oil Company Inc | Perkins, OK 74059-0642 | Oil & Gas Operator | Feb 2006 |
| 224 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2014 |
| 225 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Apr 2024 |
| 226 | Double H Petroleum Corporation | Tulsa, OK 74136-5414 | Oil & Gas Operator | May 2006 |
| 227 | Double R Petroleum | | Oil & Gas Operator | Sep 2004 |
| 228 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Jan 2024 |
| 229 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Feb 2024 |
| 230 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 231 | Eagle Energy Production LLC | | Oil & Gas Operator | Mar 2020 |
| 232 | Eagle Minerals & Oil Prop Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2002 |
| 233 | Eagle Minerals Inc | Tulsa, OK 74119 | Oil Operator | Jun 1998 |
| 234 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Feb 2024 |
| 235 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2024 |
| 236 | Edge Oil Company Inc | Cleveland, OK 74020-0284 | Oil & Gas Operator | Dec 2023 |
| 237 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 238 | Edwards Johnny E | Drumright, OK 74030 | Oil Operator | Apr 2011 |
| 239 | Edwards Oil & Gas Company | Oklahoma City, OK 73156-0386 | Oil & Gas Operator | Mar 2015 |
| 240 | Edwards Roy & Co Inc | Edmond, OK 73013-1354 | Oil & Gas Operator | Feb 2012 |
| 241 | Eec Inc | Norman, OK 73069-6344 | Oil & Gas Operator | Feb 2024 |
| 242 | Egret Operating Company | Muskogee, OK 74402-1871 | Oil & Gas Operator | Jan 2024 |
| 243 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 244 | Eleven K Oil & Gas LLC | | Oil Operator | Feb 2024 |
| 245 | Elint Operating Inc | Oklahoma City, OK 73106 | Oil & Gas Operator | May 1995 |
| 246 | Elite Resources Inc | Cleveland, OK 74020-0614 | Oil & Gas Operator | Feb 2024 |
| 247 | Emmaus Energy LLC | | Oil & Gas Operator | Aug 2022 |
| 248 | Encore Operating Inc | | Oil Operator | Jan 2024 |
| 249 | Energex Corp | Springfield, MO 65807 | Oil & Gas Operator | Jan 2024 |
| 250 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2023 |
| 251 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Jan 2024 |
| 252 | Energy Three, Inc. | Jackson, MS 39211 | Oil & Gas Operator | Jan 2024 |
| 253 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 254 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 255 | EP Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 256 | Esenjay Exploration, Inc | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 257 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 258 | Eubank Operating Company | Cushing, OK 74023-0788 | Oil & Gas Operator | Jan 2024 |
| 259 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 260 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2024 |
| 261 | Farley Christopher D | Lakeview, AR 72642-0135 | Oil & Gas Operator | Jul 2019 |
| 262 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 263 | FGS Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 264 | Fha Investments LLC | Cushing, OK 74023-1030 | Oil & Gas Operator | Jan 2024 |
| 265 | Fha Operating LLC | | Oil & Gas Operator | Nov 2023 |
| 266 | Fitzsimmons Randall W & Deborah S | | Oil & Gas Operator | Jan 2024 |
| 267 | Flatt Energy Inc | | Oil & Gas Operator | Sep 2019 |
| 268 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 269 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 270 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 271 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 272 | Freedom Operating Company LLC | | Oil & Gas Operator | Jan 2024 |
| 273 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Feb 2024 |
| 274 | G M C Oil & Gas LTD | Oklahoma City, OK 73102-8804 | Oil & Gas Operator | Sep 1999 |
| 275 | Gaskins Glendell L | Slick, OK 74071-0098 | Oil & Gas Operator | Feb 2024 |
| 276 | Geo American Resources Inc | Tulsa, OK 74130-1575 | Oil & Gas Operator | Jan 2024 |
| 277 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 278 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 279 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Feb 2024 |
| 280 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Feb 2024 |
| 281 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2024 |
| 282 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2024 |
| 283 | GMG Oil & Gas Corporation | Okmulgee, OK 74447-1235 | Oil & Gas Operator | Feb 2024 |
| 284 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 285 | Gomaco Operating Company | Tulsa, OK 74115-8712 | Oil & Gas Operator | Feb 2024 |
| 286 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 287 | Gordon Brothers Oil Company | Stroud, OK 74079-0355 | Oil & Gas Operator | Jul 2017 |
| 288 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 289 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 290 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 291 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Feb 2024 |
| 292 | Grooms T D | Stillwater, OK 74075-3600 | Oil & Gas Operator | Oct 2001 |
| 293 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 294 | Guest Petroleum Incorporated | Edmond, OK 73083-0805 | Oil & Gas Operator | Feb 2024 |
| 295 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 296 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2024 |
| 297 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 298 | Gypsyglenn Oil Company LLC | | Oil & Gas Operator | Mar 2024 |
| 299 | H & M Resources LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 300 | H G & G Inc | Edmond, OK 73034 | Oil & Gas Operator | Jan 2006 |