| 201 | Cox Bros Oil Co | Hominy, OK 74035 | Oil Operator | Mar 2022 |
| 202 | Craft & Craft Productions LLC | | Oil Operator | Dec 2023 |
| 203 | Crain & Deisenroth | Tulsa, OK 74103-4433 | Oil & Gas Operator | Mar 2015 |
| 204 | CRM Energy Partners | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2024 |
| 205 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 206 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 207 | Crude Marketing & Trans Inc | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2017 |
| 208 | Crude Oil Recovery Inc | Loma Linda, CA 92354 | Oil & Gas Operator | Mar 2006 |
| 209 | Cruzen Drilling Company Inc | Cleveland, OK 74020-0470 | Oil Operator | Nov 2014 |
| 210 | D & B Operating LLC | | Oil Operator | Jan 2023 |
| 211 | D & F Oil Company | Dewey, OK 74029 | Oil & Gas Operator | Apr 2001 |
| 212 | D & J Oil Co | Kermit, TX 79745 | Oil & Gas Operator | May 2024 |
| 213 | D & P Tank Service, Inc. | | Oil Operator | Mar 2000 |
| 214 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 215 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | May 2024 |
| 216 | D-B-K Operating Company | | Oil Operator | Jan 2006 |
| 217 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | May 2024 |
| 218 | Dahl & Smith Oil Co | Barnsdall, OK 74002 | Oil & Gas Operator | Aug 1999 |
| 219 | Dahl Randall Lee | Barnsdall, OK 74002 | Oil Operator | Jan 2024 |
| 220 | Daisy Pointer | | Oil Operator | Jul 1999 |
| 221 | Dance Oil Co | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 222 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 223 | Davis Oil Company | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2018 |
| 224 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | May 2024 |
| 225 | Davis/Osage Corp | Tulsa, OK 74103 | Oil Operator | Jan 2001 |
| 226 | Dawso Levi | Pawhuska, OK 74056 | Oil & Gas Operator | Mar 2015 |
| 227 | DBS Oil Operating | Pawhuska, OK 74056 | Oil Operator | Aug 2013 |
| 228 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 229 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 230 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 231 | Delong Ralph J | Sapulpa, OK 74066 | Oil & Gas Operator | Nov 2005 |
| 232 | Delong, Ralph S | | Oil & Gas Operator | Jul 2023 |
| 233 | Demier Oil Company | Tulsa, OK 74105-2128 | Oil & Gas Operator | Nov 2008 |
| 234 | Dennison George | Tulsa, OK 74112-6732 | Oil & Gas Operator | Apr 2020 |
| 235 | Des Oil Incorporated | Sedan, KS 67361 | Oil Operator | Nov 1998 |
| 236 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 237 | Dewey Enterprises Inc | | Oil & Gas Operator | Jan 2024 |
| 238 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2024 |
| 239 | Diamond E Oil Company LLC | Hominy, OK 74035-0676 | Oil Operator | Jan 2024 |
| 240 | Diehl Mark | | Oil Operator | Nov 1998 |
| 241 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 242 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 243 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 244 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | May 2024 |
| 245 | Domar Oil & Gas, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |
| 246 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 247 | Double G Oil LLC | | Oil Operator | Jan 2024 |
| 248 | Drummond, F F | | Oil Operator | Jan 2024 |
| 249 | Drumright Well Service Inc | Oilton, OK 74052-0190 | Oil & Gas Operator | Jan 2024 |
| 250 | Duggan Stephen F | Boston, MA 2131 | Oil & Gas Operator | Jun 2010 |
| 251 | Dukes T F | | Oil & Gas Operator | Apr 2007 |
| 252 | Eagle Road Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 253 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Feb 2024 |
| 254 | Earth Oil Inc | Skiatook, OK 74070-0578 | Oil & Gas Operator | Oct 2008 |
| 255 | Ecc Energy Corporation | Dewey, OK 74029 | Oil & Gas Operator | Feb 2020 |
| 256 | Eclipse Production Company | Bartlesville, OK 74003 | Oil Operator | Nov 2005 |
| 257 | Eddings Steve L | Osage, OK 74054 | Oil & Gas Operator | Jul 2022 |
| 258 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 259 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 260 | Elmore Stanley G | | Oil & Gas Operator | Sep 2023 |
| 261 | Emerson Oil Company | Rindge, NH 03461 | Oil & Gas Operator | Feb 2008 |
| 262 | Emery Edward A | Tulsa, OK 74145-7921 | Oil Operator | Jan 2024 |
| 263 | Endicott Melvin F | Ponca City, OK 74601 | Oil & Gas Operator | Apr 2001 |
| 264 | Enerco Energy Corporation | Norman, OK 73069-6643 | Oil & Gas Operator | Apr 2020 |
| 265 | Energas Corporation | Oklahoma City, OK 73105-6422 | Oil & Gas Operator | Jan 2024 |
| 266 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Jan 2024 |
| 267 | Ensight Energy Group Inc | Richardson, TX 75080-2370 | Oil & Gas Operator | Dec 2023 |
| 268 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 269 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 270 | Epperson John R | Bartlesville, OK 74003 | Oil Operator | Aug 1999 |
| 271 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Jan 2024 |
| 272 | Equity Drilling Company Inc | Dewey, OK 74029 | Oil & Gas Operator | Nov 1998 |
| 273 | Erwin Oil & Gas LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Apr 2019 |
| 274 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 275 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 276 | Evans / Heslet Operating | Tulsa, OK 74170 | Oil & Gas Operator | Aug 1999 |
| 277 | Eyler Corporation | | Oil & Gas Operator | Nov 2012 |
| 278 | Eyler Dean E | Cleveland, OK 74020-0260 | Oil & Gas Operator | Jan 2024 |
| 279 | F & G Management LLC | Claremore, OK 74019-0392 | Oil Operator | Nov 2023 |
| 280 | F & J Oil Co LLC | Pawauska, OK 74056 | Oil Operator | Feb 2024 |
| 281 | F & M Oil Company Inc | Pettus, TX 78146 | Oil & Gas Operator | May 2024 |
| 282 | Far West Development, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2024 |
| 283 | Farmland Industries Inc | Kansas City, MO 64195-0111 | Oil & Gas Operator | Nov 1995 |
| 284 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 285 | Fell Oil And Gas Inc | Tulsa, OK 74157-9487 | Oil & Gas Operator | Aug 2016 |
| 286 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 287 | Fieldstone Exploration Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2007 |
| 288 | Fifty-One Production Inc | Mannford, OK 74044 | Oil & Gas Operator | Jan 2013 |
| 289 | Fine Jack | Pensacola, FL 32516 | Oil Operator | May 1995 |
| 290 | Flat Rock Energy Company | Skiatook, OK 74070-0100 | Oil & Gas Operator | May 2017 |
| 291 | Formby E E | Pawhuska, OK 74056 | Oil Operator | Nov 1998 |
| 292 | Four Brothers Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2020 |
| 293 | Fox Jr Jimmy D | Bartlesville, OK 74003 | Oil & Gas Operator | Nov 2005 |
| 294 | Fox Northeastern Oil & Gas Corp | Bartlesville, OK 74003-2226 | Oil & Gas Operator | Feb 2024 |
| 295 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2024 |
| 296 | Frontier Energy Serv LLC | Enid, OK 73702-1187 | Oil & Gas Operator | Jun 2016 |
| 297 | Future Energy Partners | Bartlesville, OK 74005 | Oil & Gas Operator | Feb 2017 |
| 298 | G & B Tank Truck Service | Binger, OK 73009 | Oil & Gas Operator | Jan 2008 |
| 299 | Galaxy Corporation (The) | Sapulpa, OK 74067-2003 | Oil & Gas Operator | Feb 2024 |
| 300 | Galt Investment Company LLC | | Oil Operator | Jan 2024 |