| 8301 | Dreiling Resourc | | Oil Operator | Oct 1996 |
| 8302 | Dreiling Resources Inc. | Victoria, KS 67671 | Oil Operator | Sep 1997 |
| 8303 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Sep 2026 |
| 8304 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 8305 | Dresser Industrial Park, Inc. | North Tonawanda, NY 14120 | Gas Operator | Dec 2025 |
| 8306 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 8307 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 8308 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 8309 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 8310 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 8311 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 8312 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 8313 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Jun 2026 |
| 8314 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 8315 | Dri Operating Company | West Chester, PA 193820000 | Gas Operator | Dec 2008 |
| 8316 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 8317 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 8318 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Jul 2026 |
| 8319 | Drilex Oil & Gas | | Oil Operator | Apr 1987 |
| 8320 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 8321 | Driller'S & Prod | | Oil & Gas Operator | Oct 1994 |
| 8322 | Drillers & Producers, Inc. | Newton, KS 67114 | Oil Operator | Dec 2019 |
| 8323 | Drillers Energy Search, Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 8324 | Drillers LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2025 |
| 8325 | Drillex Consulting Corp | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2026 |
| 8326 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 8327 | Drilling & Production Co. | | Oil & Gas Operator | Jul 2026 |
| 8328 | Drilling Exploration & Operating Co. Inc. | | Oil & Gas Operator | Jul 2026 |
| 8329 | Drilling, Operg & Explor, Inc. | | Oil & Gas Operator | Feb 1990 |
| 8330 | Drillmar Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | Nov 2014 |
| 8331 | Drillmar Operating Company | Houston, TX 77019 | Oil & Gas Operator | Jun 2013 |
| 8332 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Sep 2026 |
| 8333 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 8334 | Driltrol | | Oil & Gas Operator | Dec 1984 |
| 8335 | Driscoll Jerry J | | Oil Operator | Apr 1994 |
| 8336 | Driscoll Lease O | | Oil Operator | Jul 1988 |
| 8337 | Driscoll Lease Operations, Inc. | Russell, KS 67665 | Oil Operator | Dec 1998 |
| 8338 | Driscoll S.W.D. Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Sep 2026 |
| 8339 | Driscoll, Jerry J Oil Investment Inc | Russell, KS 67665 | Oil Operator | May 2026 |
| 8340 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 8341 | DRL Operating In | | Oil Operator | Sep 1986 |
| 8342 | Drmas, LLC | | Oil & Gas Operator | Nov 2024 |
| 8343 | Drop Tine Exploration, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2019 |
| 8344 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |
| 8345 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 8346 | Drum Energy, L.L.C. | | Gas Operator | Dec 2016 |
| 8347 | Drum Oil & Gas, Inc. | Liberty, TX 77575 | Oil & Gas Operator | Sep 2026 |
| 8348 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 8349 | Drummond, F F | | Oil Operator | Jun 2026 |
| 8350 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Jul 2026 |
| 8351 | Dry Coulee Oil & Gas Company | Oilmont, MT 59466 | Oil Operator | Oct 2003 |
| 8352 | Dry Creek Disposal Company, Inc. | | Oil & Gas Operator | Nov 2021 |
| 8353 | Dry Creek Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Sep 2026 |
| 8354 | Dry Fork Production Co | Wichita Falls, TX 76301 | Oil Operator | Apr 2003 |
| 8355 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 8356 | Dry Hole Producing LLC | Poland, OH 44514 | Oil & Gas Operator | Dec 2025 |
| 8357 | Dry Hole Producing LP | Poland, OH 44514-3631 | Oil & Gas Operator | Dec 2019 |
| 8358 | Dryes Corner LLC | Oklahoma City, OK 73118 | Oil Operator | Mar 2026 |
| 8359 | DSB Energy, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 8360 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 8361 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Sep 2026 |
| 8362 | DSTJ Corporation | Montgomery, TX 77316 | Oil & Gas Operator | Mar 2001 |
| 8363 | DSW Production Corp. | Houston, TX 77265 | Oil & Gas Operator | Sep 2026 |
| 8364 | DSX Operating Co. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2008 |
| 8365 | Dte Gas Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2007 |
| 8366 | Dte Gas Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2014 |
| 8367 | Du Pont Oil Comp | | Oil Operator | May 1984 |
| 8368 | Dual Energy, Inc. | | Oil & Gas Operator | Oct 2022 |
| 8369 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 8370 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Sep 2026 |
| 8371 | Dual Quiver Oil & Gas Op, LLC | Flower Mound, TX 75027 | Oil & Gas Operator | Sep 2026 |
| 8372 | Duane Exploration Limited | Andover, KS 67002 | Oil Operator | Jul 1996 |
| 8373 | Dubach Gas Company | | Oil Operator | May 2003 |
| 8374 | Dubisz, Richard And Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2025 |
| 8375 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Jul 2026 |
| 8376 | Dubois, Allen | Whitewater, KS 67154 | Oil Operator | May 2000 |
| 8377 | Ducharme Oil, LLC | | Oil & Gas Operator | Jan 2025 |
| 8378 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Jun 2026 |
| 8379 | Duck Creek Energy Inc | Brecksville, OH 44141 | Oil & Gas Operator | Dec 2025 |
| 8380 | Duck Creek Petroleum LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2012 |
| 8381 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jun 2026 |
| 8382 | Ducky Oil Corporation | Fort Worth, TX 76120 | Oil & Gas Operator | Sep 2026 |
| 8383 | Duco Energy LLC | Tulsa, OK 74145-4514 | Oil & Gas Operator | Mar 2015 |
| 8384 | Ducote Oil Co. | | Oil & Gas Operator | Sep 1997 |
| 8385 | Duderstadt, A. R. | Boling, TX 77420 | Oil & Gas Operator | Sep 2026 |
| 8386 | Dudley Oil Co. | Crane, TX 79731 | Oil & Gas Operator | Jan 2006 |
| 8387 | Dudrey Carl | | Oil & Gas Operator | Feb 1993 |
| 8388 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 8389 | Duerfeldt | | Oil Operator | Dec 2025 |
| 8390 | Duff Oil Co | | Oil & Gas Operator | Aug 2000 |
| 8391 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 8392 | Dugan Evan | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2025 |
| 8393 | Dugan Guy E | Walhonding, OH 43843 | Oil & Gas Operator | Dec 2015 |
| 8394 | Dugan Harry Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1993 |
| 8395 | Dugan Oil And Gas LLC | Walhonding, OH 43843-9612 | Oil & Gas Operator | Dec 2025 |
| 8396 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Jul 2026 |
| 8397 | Duggan Stephen F | Boston, MA 2131 | Oil & Gas Operator | Jun 2010 |
| 8398 | Dugger, Glenn | Alice, TX 78332 | Oil & Gas Operator | Nov 2013 |
| 8399 | Duggins Equipment Inc | Woodward, OK 73802-1213 | Gas Operator | Jul 2026 |
| 8400 | Duhring Resource Co | Sheffield, PA 16347-2642 | Oil & Gas Operator | Dec 2012 |