| 1301 | Double U Oil Co. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1996 |
| 1302 | Double U Oil Co., LTD. | San Antonio, TX 78217 | Oil & Gas Operator | May 2000 |
| 1303 | Doudna, Mark A. | Osawatomie, KS 66064 | Oil Operator | Nov 2009 |
| 1304 | Doug And Janene Risenhoover Oil And Gas LLC | Cushing, OK 74023 | Oil Operator | Dec 2025 |
| 1305 | Doug Grimes | Monahans, TX BAD ADDR | Oil & Gas Operator | Apr 1996 |
| 1306 | Doug'S Pumping Service | | Oil Operator | Sep 2025 |
| 1307 | Dougherty Properties | Beeville, TX 78104 | Oil & Gas Operator | Jun 1997 |
| 1308 | Dougherty, H W | Petaluma, CA 94954 | Gas Operator | Oct 2019 |
| 1309 | Doughtie Operating Company, LLC | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2023 |
| 1310 | Douglas Bieda Dba Lonestar Farms | Clarksburg, PA 15725-8525 | Gas Operator | Dec 2025 |
| 1311 | Douglas Edwards | | Oil Operator | Nov 1993 |
| 1312 | Douglas Fairbanks Holdings LLC | Pine Hurst, TX 77362-9998 | Oil & Gas Operator | Nov 2025 |
| 1313 | Douglas Investments Inc | Fort Worth, TX 76137 | Oil Operator | Jan 2020 |
| 1314 | Douglas Oil & Gas Co Inc | Ada, OK 74820 | Oil Operator | Apr 2014 |
| 1315 | Douglas Oil & Gas Inc | Canonsburg, PA 15317 | Gas Operator | Dec 2003 |
| 1316 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 1317 | Douglas Petroleum Inc. | Spring, TX 77379 | Oil & Gas Operator | Nov 2010 |
| 1318 | Douglas W. Baker Trustee | | Oil & Gas Operator | Dec 1993 |
| 1319 | Douglas Whitney | | Oil Operator | Dec 2004 |
| 1320 | Douglas, Marvin E Dba Douglas Radiation | | Oil & Gas Operator | Dec 2023 |
| 1321 | Douglas, Norvel Trust | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 1322 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 1323 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Feb 2026 |
| 1324 | Dove Creek Resources, LLC | Arlington, TX 76012 | Oil Operator | Feb 2026 |
| 1325 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 1326 | Dove Investments LLC | Wetumka, OK 74883 | Oil Operator | Aug 2025 |
| 1327 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 1328 | Dover Atwood Corp. | Massillon, OH 44646 | Oil & Gas Operator | Dec 2024 |
| 1329 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 1330 | Dow Chemical Co. | | Oil & Gas Operator | Dec 1997 |
| 1331 | Dow Intrastate Gas Company | | Oil Operator | Dec 2023 |
| 1332 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 1333 | Dowd, Gene | | Oil & Gas Operator | Dec 2013 |
| 1334 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | Feb 2026 |
| 1335 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | Feb 2026 |
| 1336 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Feb 2026 |
| 1337 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 1338 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | Feb 2026 |
| 1339 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Sep 2025 |
| 1340 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 1341 | Doyle Dempsey | | Oil Operator | May 1997 |
| 1342 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 1343 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 1344 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Aug 2024 |
| 1345 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | Feb 2026 |
| 1346 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Feb 2026 |
| 1347 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 1348 | DR Well Operator | | Oil Operator | Jan 1990 |
| 1349 | DR. Richard C. Baker | | Oil & Gas Operator | Sep 2009 |
| 1350 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | Feb 2026 |
| 1351 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 1352 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 1353 | Dragon Energy Corporation | | Oil & Gas Operator | Oct 2006 |
| 1354 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 1355 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Feb 2026 |
| 1356 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 1357 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 1358 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Feb 2026 |
| 1359 | Drake Denver | Shinglehouse, PA 16748-5517 | Oil & Gas Operator | Dec 2025 |
| 1360 | Drake Energy Corporation | | Gas Operator | Dec 2024 |
| 1361 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Dec 2025 |
| 1362 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Nov 2025 |
| 1363 | Drake Oil & Gas, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 1364 | Drake Petroleum, LLC | Cypress, TX 77429 | Oil & Gas Operator | Jun 2023 |
| 1365 | Drake, Stuart | | Oil Operator | Dec 2013 |
| 1366 | Draw Oil & Gas Inc | | Oil & Gas Operator | Jun 1995 |
| 1367 | Drawings, LLC | Albuquerque, NM 87109 | Oil Operator | Aug 2025 |
| 1368 | DRD Operating Company | | Oil & Gas Operator | Feb 2014 |
| 1369 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 1370 | Dreiling Exploration LLC | Victoria, KS 67671 | Oil Operator | Mar 2018 |
| 1371 | Dreiling Limited | | Oil Operator | Jun 1984 |
| 1372 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 1373 | Dreiling Resourc | | Oil Operator | Oct 1996 |
| 1374 | Dreiling Resources Inc. | Victoria, KS 67671 | Oil Operator | Sep 1997 |
| 1375 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Feb 2026 |
| 1376 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 1377 | Dresser Industrial Park, Inc. | North Tonawanda, NY 14120 | Gas Operator | Dec 2024 |
| 1378 | Drew Cornell, Inc. | | Oil & Gas Operator | Jun 1992 |
| 1379 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 1380 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 1381 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 1382 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 1383 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 1384 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 1385 | DRG Energy Inc. | Norman, OK 73026-3171 | Oil & Gas Operator | Nov 2025 |
| 1386 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 1387 | Dri Operating Company | West Chester, PA 19382-0000 | Gas Operator | Dec 2008 |
| 1388 | Drifting Spirit, LLC | London, KY 40741 | Gas Operator | Dec 2018 |
| 1389 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 1390 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 1391 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Dec 2025 |
| 1392 | Drilex Oil & Gas | | Oil Operator | Apr 1987 |
| 1393 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 1394 | Drill-Co., Inc. | Metairie, LA 70004 | Oil & Gas Operator | Feb 2026 |
| 1395 | Driller'S & Prod | | Oil & Gas Operator | Oct 1994 |
| 1396 | Drillers & Producers, Inc. | Newton, KS 67114 | Oil Operator | Dec 2019 |
| 1397 | Drillers Energy Search, Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 1398 | Drillers LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 1399 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 1400 | Drilling & Production Co. | | Oil & Gas Operator | Dec 2025 |