| 8201 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 8202 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 8203 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 8204 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 8205 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Jun 2025 |
| 8206 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 8207 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Jun 2025 |
| 8208 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 8209 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2025 |
| 8210 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 8211 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 8212 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | Dec 2025 |
| 8213 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 8214 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Dec 2025 |
| 8215 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Oct 2025 |
| 8216 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2024 |
| 8217 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2024 |
| 8218 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 8219 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Jan 2025 |
| 8220 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Oct 2025 |
| 8221 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 8222 | DKM Offshore Energy Inc. | | Oil & Gas Operator | Dec 1993 |
| 8223 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 8224 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 8225 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 8226 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Dec 2025 |
| 8227 | DL Energy, LLC | Saco, MT 59261 | Gas Operator | Aug 2025 |
| 8228 | DL Resources Inc | Ludlow, PA 16333-0039 | Oil & Gas Operator | Dec 2024 |
| 8229 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 8230 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Dec 2025 |
| 8231 | DLJ Investments, LLC | Springboro, OH 45006 | Oil Operator | Dec 2023 |
| 8232 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Sep 2025 |
| 8233 | DLM Energy | Houston, TX 77058 | Oil & Gas Operator | Sep 1994 |
| 8234 | DLM Oil | | Oil Operator | Nov 2008 |
| 8235 | DLM Ventures | | Oil & Gas Operator | Dec 2004 |
| 8236 | DLM Ventures LLC | | Oil & Gas Operator | Dec 2004 |
| 8237 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 8238 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Jul 2025 |
| 8239 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Jun 2025 |
| 8240 | DML Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2025 |
| 8241 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 8242 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 8243 | DMV Pipeline LLC | Lipan, TX 76462 | Oil & Gas Operator | Dec 2025 |
| 8244 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 8245 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 8246 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 8247 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Oct 2025 |
| 8248 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 8249 | Dobbs Oil & Gas | | Oil Operator | Dec 2013 |
| 8250 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Dec 2025 |
| 8251 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 8252 | Dobson Oil And Gas LLC | Deer Creek, OK 74636 | Oil Operator | Aug 2022 |
| 8253 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 8254 | Doc Oil | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2019 |
| 8255 | Doc Oil Corp. | | Oil Operator | Dec 2006 |
| 8256 | Doc'S Tank Trucks | Jacksboro, TX 76458 | Oil Operator | Jun 2007 |
| 8257 | Docherty Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 8258 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 8259 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 8260 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | Oct 2025 |
| 8261 | Dodd Oil & Gas | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 8262 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 8263 | Dodson Prairie Oil & Gas LLC | San Antonio, TX 78205 | Gas Operator | Dec 2025 |
| 8264 | Dodson, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 1998 |
| 8265 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 8266 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | Dec 2025 |
| 8267 | Doege, Harry | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 8268 | Doenges, William C. | Pampa, TX 79065 | Gas Operator | Jun 1993 |
| 8269 | Doggy Oil Corp | Decatur, GA 30031 | Oil & Gas Operator | Dec 2025 |
| 8270 | Dogwood Operating Company, Inc. | Houston, TX 77069 | Oil & Gas Operator | Dec 2025 |
| 8271 | Dol Resources Inc | Rowlett, TX 75088 | Oil & Gas Operator | Nov 2025 |
| 8272 | Dolberry Energy Resources Corp. | Dallas, TX 75252 | Oil Operator | Dec 2025 |
| 8273 | Dolch Production, Inc. | San Antonio, TX 78248 | Oil & Gas Operator | Jul 1996 |
| 8274 | Dole Enterprises Inc. | | Oil & Gas Operator | Oct 2025 |
| 8275 | Dolezal George Jr | Littleton, CO 80163 | Oil & Gas Operator | Sep 2006 |
| 8276 | Dolinar, Michael J. | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 8277 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Jun 2025 |
| 8278 | Dolphin Petroleum | Alice, TX 78333 | Oil & Gas Operator | Jun 2008 |
| 8279 | Dolphin Petroleum, LP | Alice, TX 78333 | Oil & Gas Operator | Dec 2025 |
| 8280 | Domac Oil Company Inc | Perkins, OK 74059-0642 | Oil & Gas Operator | Feb 2006 |
| 8281 | Domar Oil & Gas | | Gas Operator | May 1995 |
| 8282 | Domar Oil & Gas Inc | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |
| 8283 | Dome De Sel LLC | | Oil & Gas Operator | Nov 2024 |
| 8284 | Dome Drilling Co | Westlake, OH 44145-1964 | Oil & Gas Operator | Dec 2009 |
| 8285 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 8286 | Dome Producing | Cleveland, OH 44114 | Oil & Gas Operator | Dec 1988 |
| 8287 | Domestic Crude | Graham, TX 76450 | Oil & Gas Operator | Jul 2000 |
| 8288 | Domestic Energy Corporation | | Oil Operator | Jan 1988 |
| 8289 | Domestic Oil & Gas Co | Bedford, OH 44146 | Oil & Gas Operator | Dec 1990 |
| 8290 | Domestic Oil Producers | | Oil Operator | Oct 1980 |
| 8291 | Domestic Oil Producers,Inc. | | Oil Operator | Oct 1998 |
| 8292 | Domestic Oil Production | | Oil & Gas Operator | Oct 1989 |
| 8293 | Dominex, Inc. | | Gas Operator | Jan 1986 |
| 8294 | Dominguez Energy L.P. | | Oil & Gas Operator | Dec 2000 |
| 8295 | Dominguez Properties | | Oil & Gas Operator | Dec 1991 |
| 8296 | Dominion Corporation | Houston, TX 77001 | Oil & Gas Operator | Dec 2010 |
| 8297 | Dominion East Ohio | North Canton, OH 44720 | Oil & Gas Operator | Dec 2023 |
| 8298 | Dominion Energy Transmission, Inc. | | Oil & Gas Operator | Dec 2019 |
| 8299 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Oct 2024 |
| 8300 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |