| 8201 | DML Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 8202 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 8203 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 8204 | DMV Pipeline LLC | Plano, TX 75074 | Oil & Gas Operator | Jun 2025 |
| 8205 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 8206 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 8207 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 8208 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Apr 2025 |
| 8209 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 8210 | Dobbs Oil & Gas | | Oil Operator | Dec 2013 |
| 8211 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Jun 2025 |
| 8212 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 8213 | Dobson Oil And Gas LLC | Deer Creek, OK 74636 | Oil Operator | Aug 2022 |
| 8214 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 8215 | Doc Oil | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2019 |
| 8216 | Doc Oil Corp. | | Oil Operator | Dec 2006 |
| 8217 | Doc'S Tank Trucks | Jacksboro, TX 76458 | Oil Operator | Jun 2007 |
| 8218 | Docherty Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 8219 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 8220 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 8221 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2025 |
| 8222 | Dodd Oil & Gas | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 8223 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 8224 | Dodson Prairie Oil & Gas LLC | San Antonio, TX 78205 | Gas Operator | Jun 2025 |
| 8225 | Dodson, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 1998 |
| 8226 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 8227 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | Jun 2025 |
| 8228 | Doege, Harry | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 8229 | Doggy Oil Corp | Decatur, GA 30031 | Oil & Gas Operator | Jun 2025 |
| 8230 | Dogwood Operating Company, Inc. | Houston, TX 77069 | Oil & Gas Operator | Jun 2025 |
| 8231 | Dol Resources Inc | Rowlett, TX 75088 | Oil & Gas Operator | May 2025 |
| 8232 | Dolberry Energy Resources Corp. | Dallas, TX 75252 | Oil Operator | Jun 2025 |
| 8233 | Dolch Production, Inc. | San Antonio, TX 78248 | Oil & Gas Operator | Jul 1996 |
| 8234 | Dole Enterprises Inc. | | Oil & Gas Operator | Apr 2025 |
| 8235 | Dolezal George Jr | Littleton, CO 80163 | Oil & Gas Operator | Sep 2006 |
| 8236 | Dolinar, Michael J. | Angola, NY 14006 | Gas Operator | Dec 2023 |
| 8237 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Feb 2025 |
| 8238 | Dolphin Petroleum | Alice, TX 78333 | Oil & Gas Operator | Jun 2008 |
| 8239 | Dolphin Petroleum, LP | Alice, TX 78333 | Oil & Gas Operator | Jun 2025 |
| 8240 | Domac Oil Company Inc | Perkins, OK 74059-0642 | Oil & Gas Operator | Feb 2006 |
| 8241 | Domar Oil & Gas | | Gas Operator | May 1995 |
| 8242 | Domar Oil & Gas, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |
| 8243 | Dome De Sel LLC | | Oil & Gas Operator | Nov 2024 |
| 8244 | Dome Drilling Co | Westlake, OH 44145-1964-1964 | Oil & Gas Operator | Dec 2009 |
| 8245 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 8246 | Dome Producing | Cleveland, OH 44114 | Oil & Gas Operator | Dec 1988 |
| 8247 | Domestic Crude | Graham, TX 76450 | Oil & Gas Operator | Jul 2000 |
| 8248 | Domestic Energy Corporation | | Oil Operator | Jan 1988 |
| 8249 | Domestic Oil & Gas Co | Bedford, OH 44146 | Oil & Gas Operator | Dec 1990 |
| 8250 | Domestic Oil Producers | | Oil Operator | Oct 1980 |
| 8251 | Domestic Oil Producers,Inc. | | Oil Operator | Oct 1998 |
| 8252 | Domestic Oil Production | | Oil & Gas Operator | Oct 1989 |
| 8253 | Dominguez Energy L.P. | | Oil & Gas Operator | Dec 2000 |
| 8254 | Dominguez Properties | | Oil & Gas Operator | Dec 1991 |
| 8255 | Dominion Corporation | Houston, TX 77001 | Oil & Gas Operator | Dec 2010 |
| 8256 | Dominion East Ohio | North Canton, OH 44720 | Oil & Gas Operator | Dec 2023 |
| 8257 | Dominion Energy Transmission, Inc. | | Oil & Gas Operator | Dec 2019 |
| 8258 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Oct 2024 |
| 8259 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 8260 | Dominion Field Services Inc | Richmond, VA 23219 | Oil & Gas Operator | Dec 2013 |
| 8261 | Dominion Midstream Services, LP | | Oil Operator | Dec 2006 |
| 8262 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 8263 | Dominion Minerals Corporation | Houston, TX 77014 | Oil & Gas Operator | Nov 2009 |
| 8264 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Jun 2025 |
| 8265 | Dominion Oil & Gas Corporation | Irving, TX 75039 | Oil & Gas Operator | Jun 2012 |
| 8266 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 8267 | Dominion Oklahoma Texas E&P, Inc | Richmond, VA 23219 | Oil & Gas Operator | Sep 2018 |
| 8268 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 8269 | Dominion Oklahoma Texas Exploration & Production | Houston, TX 77060 | Oil & Gas Operator | Dec 2006 |
| 8270 | Dominion Operating, LLC | Midland, TX 79708 | Oil Operator | Mar 2018 |
| 8271 | Dominion Production Company, LLC | Tampa, FL 33606 | Oil & Gas Operator | Jun 2025 |
| 8272 | Dominion Resources, Inc | Staffordsville, KY 41256 | Oil & Gas Operator | Dec 2014 |
| 8273 | Dominiq Operating, Inc | Scurry, TX 75158 | Oil Operator | Dec 2023 |
| 8274 | Domino Operations, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2025 |
| 8275 | Domino Prod Services Inc | Bellville, TX 77418 | Oil & Gas Operator | Feb 2004 |
| 8276 | Dominus Energy, Inc | Austin, TX 78737 | Oil & Gas Operator | Dec 2020 |
| 8277 | Dominy Oil Co., Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 1999 |
| 8278 | Don Bar Investment Company | Windthorst, TX 76389 | Oil & Gas Operator | Feb 2004 |
| 8279 | Don Byers Oil & Gas LLC | Heath, OH 43056 | Oil & Gas Operator | Dec 2024 |
| 8280 | Don Erbert Oil Company | | Oil Operator | Oct 2013 |
| 8281 | Don G. Wiley, Jr. | | Oil Operator | Dec 1979 |
| 8282 | Don Karst Well Service, Inc. | Russell, KS 67665 | Oil Operator | Feb 2025 |
| 8283 | Don Peterson Company, LLC - | Loving, TX 76460 | Oil Operator | Jun 2025 |
| 8284 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 8285 | Don Sims Oil | | Oil Operator | Feb 2025 |
| 8286 | Don Townes | | Oil Operator | Sep 2000 |
| 8287 | Don W. Holcomb | | Oil Operator | Feb 1996 |
| 8288 | Don Webb | | Oil Operator | Mar 1984 |
| 8289 | Don Yohe Enterprises And Devonian Energy Inc | | Gas Operator | Dec 1999 |
| 8290 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Apr 2018 |
| 8291 | Don'S Oil Company Inc | Oxford, KS 67119-0006 | Oil Operator | Apr 2011 |
| 8292 | Don-Dale, Inc. | Clarksville, TX 75426 | Oil & Gas Operator | Aug 2003 |
| 8293 | Donahue Pipeline Construction, Inc. | Branchland, WV 25506 | Gas Operator | Dec 2021 |
| 8294 | Donaker Alan M | Warsaw, OH 43844 | Oil & Gas Operator | Dec 1994 |
| 8295 | Donald & Danny Dews Production | | Oil Operator | Jan 2025 |
| 8296 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 8297 | Donald C. Ring Revocable Trust | Sebring, FL 33875 | Gas Operator | Dec 2023 |
| 8298 | Donald C. Slawson | | Oil Operator | Jun 1985 |
| 8299 | Donald E & Janet L Rearick | Ford City, PA 16226-9801 | Gas Operator | Dec 2024 |
| 8300 | Donald J. Zadeck | | Oil & Gas Operator | Feb 1998 |