| 1301 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 1302 | Dreiling Exploration LLC | Victoria, KS 67671 | Oil Operator | Mar 2018 |
| 1303 | Dreiling Limited | | Oil Operator | Jun 1984 |
| 1304 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 1305 | Dreiling Resourc | | Oil Operator | Oct 1996 |
| 1306 | Dreiling Resources Inc. | Victoria, KS 67671 | Oil Operator | Sep 1997 |
| 1307 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Sep 2026 |
| 1308 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 1309 | Dresser Industrial Park, Inc. | North Tonawanda, NY 14120 | Gas Operator | Dec 2025 |
| 1310 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 1311 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 1312 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 1313 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 1314 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 1315 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 1316 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 1317 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Jun 2026 |
| 1318 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 1319 | Dri Operating Company | West Chester, PA 193820000 | Gas Operator | Dec 2008 |
| 1320 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 1321 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 1322 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Jul 2026 |
| 1323 | Drilex Oil & Gas | | Oil Operator | Apr 1987 |
| 1324 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 1325 | Driller'S & Prod | | Oil & Gas Operator | Oct 1994 |
| 1326 | Drillers & Producers, Inc. | Newton, KS 67114 | Oil Operator | Dec 2019 |
| 1327 | Drillers Energy Search, Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 1328 | Drillers LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2025 |
| 1329 | Drillex Consulting Corp | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2026 |
| 1330 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 1331 | Drilling & Production Co. | | Oil & Gas Operator | Jul 2026 |
| 1332 | Drilling Exploration & Operating Co. Inc. | | Oil & Gas Operator | Jul 2026 |
| 1333 | Drilling, Operg & Explor, Inc. | | Oil & Gas Operator | Feb 1990 |
| 1334 | Drillmar Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | Nov 2014 |
| 1335 | Drillmar Operating Company | Houston, TX 77019 | Oil & Gas Operator | Jun 2013 |
| 1336 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Sep 2026 |
| 1337 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 1338 | Driltrol | | Oil & Gas Operator | Dec 1984 |
| 1339 | Driscoll Jerry J | | Oil Operator | Apr 1994 |
| 1340 | Driscoll Lease O | | Oil Operator | Jul 1988 |
| 1341 | Driscoll Lease Operations, Inc. | Russell, KS 67665 | Oil Operator | Dec 1998 |
| 1342 | Driscoll S.W.D. Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Sep 2026 |
| 1343 | Driscoll, Jerry J Oil Investment Inc | Russell, KS 67665 | Oil Operator | May 2026 |
| 1344 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 1345 | DRL Operating In | | Oil Operator | Sep 1986 |
| 1346 | Drmas, LLC | | Oil & Gas Operator | Nov 2024 |
| 1347 | Drop Tine Exploration, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2019 |
| 1348 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |
| 1349 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 1350 | Drum Energy, L.L.C. | | Gas Operator | Dec 2016 |
| 1351 | Drum Oil & Gas, Inc. | Liberty, TX 77575 | Oil & Gas Operator | Sep 2026 |
| 1352 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 1353 | Drummond, F F | | Oil Operator | Jun 2026 |
| 1354 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Jul 2026 |
| 1355 | Dry Coulee Oil & Gas Company | Oilmont, MT 59466 | Oil Operator | Oct 2003 |
| 1356 | Dry Creek Disposal Company, Inc. | | Oil & Gas Operator | Nov 2021 |
| 1357 | Dry Creek Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Sep 2026 |
| 1358 | Dry Fork Production Co | Wichita Falls, TX 76301 | Oil Operator | Apr 2003 |
| 1359 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 1360 | Dry Hole Producing LLC | Poland, OH 44514 | Oil & Gas Operator | Dec 2025 |
| 1361 | Dry Hole Producing LP | Poland, OH 44514-3631 | Oil & Gas Operator | Dec 2019 |
| 1362 | Dryes Corner LLC | Oklahoma City, OK 73118 | Oil Operator | Mar 2026 |
| 1363 | DSB Energy, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 1364 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 1365 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Sep 2026 |
| 1366 | DSTJ Corporation | Montgomery, TX 77316 | Oil & Gas Operator | Mar 2001 |
| 1367 | DSW Production Corp. | Houston, TX 77265 | Oil & Gas Operator | Sep 2026 |
| 1368 | DSX Operating Co. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2008 |
| 1369 | Dte Gas Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2007 |
| 1370 | Dte Gas Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2014 |
| 1371 | Du Pont Oil Comp | | Oil Operator | May 1984 |
| 1372 | Dual Energy, Inc. | | Oil & Gas Operator | Oct 2022 |
| 1373 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 1374 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Sep 2026 |
| 1375 | Dual Quiver Oil & Gas Op, LLC | Flower Mound, TX 75027 | Oil & Gas Operator | Sep 2026 |
| 1376 | Duane Exploration Limited | Andover, KS 67002 | Oil Operator | Jul 1996 |
| 1377 | Dubach Gas Company | | Oil Operator | May 2003 |
| 1378 | Dubisz, Richard And Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2025 |
| 1379 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Jul 2026 |
| 1380 | Dubois, Allen | Whitewater, KS 67154 | Oil Operator | May 2000 |
| 1381 | Ducharme Oil, LLC | | Oil & Gas Operator | Jan 2025 |
| 1382 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Jun 2026 |
| 1383 | Duck Creek Energy Inc | Brecksville, OH 44141 | Oil & Gas Operator | Dec 2025 |
| 1384 | Duck Creek Petroleum LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2012 |
| 1385 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jun 2026 |
| 1386 | Ducky Oil Corporation | Fort Worth, TX 76120 | Oil & Gas Operator | Sep 2026 |
| 1387 | Duco Energy LLC | Tulsa, OK 74145-4514 | Oil & Gas Operator | Mar 2015 |
| 1388 | Ducote Oil Co. | | Oil & Gas Operator | Sep 1997 |
| 1389 | Duderstadt, A. R. | Boling, TX 77420 | Oil & Gas Operator | Sep 2026 |
| 1390 | Dudley Oil Co. | Crane, TX 79731 | Oil & Gas Operator | Jan 2006 |
| 1391 | Dudrey Carl | | Oil & Gas Operator | Feb 1993 |
| 1392 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 1393 | Duerfeldt | | Oil Operator | Dec 2025 |
| 1394 | Duff Oil Co | | Oil & Gas Operator | Aug 2000 |
| 1395 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 1396 | Dugan Evan | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2025 |
| 1397 | Dugan Guy E | Walhonding, OH 43843 | Oil & Gas Operator | Dec 2015 |
| 1398 | Dugan Harry Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1993 |
| 1399 | Dugan Oil And Gas LLC | Walhonding, OH 43843-9612 | Oil & Gas Operator | Dec 2025 |
| 1400 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Jul 2026 |