| 1201 | Double U Oil Co. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1996 |
| 1202 | Double U Oil Co., LTD. | San Antonio, TX 78217 | Oil & Gas Operator | May 2000 |
| 1203 | Doudna, Mark A. | Osawatomie, KS 66064 | Oil Operator | Nov 2009 |
| 1204 | Doug'S Pumping Service | | Oil Operator | Oct 2023 |
| 1205 | Dougherty Properties | Beeville, TX 78104 | Oil & Gas Operator | Jun 1997 |
| 1206 | Dougherty, H W | Petaluma, CA 94954 | Gas Operator | Oct 2019 |
| 1207 | Doughtie Operating Company, LLC | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2023 |
| 1208 | Douglas Edwards | | Oil Operator | Nov 1993 |
| 1209 | Douglas Fairbanks Holdings LLC | | Oil & Gas Operator | Feb 2024 |
| 1210 | Douglas Investments Inc | Saginaw, TX 76179-0148 | Oil Operator | Jan 2020 |
| 1211 | Douglas Oil & Gas Co Inc | Ada, OK 74820 | Oil Operator | Apr 2014 |
| 1212 | Douglas Oil & Gas Inc | Canonsburg, PA 15317 | Gas Operator | Dec 2003 |
| 1213 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 1214 | Douglas Petroleum Inc. | Spring, TX 77379 | Oil & Gas Operator | Nov 2010 |
| 1215 | Douglas W. Baker Trustee | | Oil & Gas Operator | Dec 1993 |
| 1216 | Douglas Whitney | | Oil Operator | Dec 2004 |
| 1217 | Douglas, Norvel Trust | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 1218 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 1219 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2024 |
| 1220 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 1221 | Dove Investments LLC | | Oil Operator | Dec 2023 |
| 1222 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 1223 | Dover Atwood Corporation | Massillon, OH 44646 | Oil & Gas Operator | Dec 2023 |
| 1224 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 1225 | Dow Intrastate Gas Company | | Oil Operator | Nov 2023 |
| 1226 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 1227 | Dowd, Gene | | Oil & Gas Operator | Dec 2013 |
| 1228 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | Apr 2024 |
| 1229 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | Apr 2024 |
| 1230 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2024 |
| 1231 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 1232 | Downing, Mark | Devine, TX 78016 | Oil & Gas Operator | Apr 2024 |
| 1233 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Dec 2023 |
| 1234 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 1235 | Doyle Dempsey | | Oil Operator | May 1997 |
| 1236 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 1237 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 1238 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 1239 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | Apr 2024 |
| 1240 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2024 |
| 1241 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 1242 | DR Oil Company Limited Partnership | | Oil Operator | Apr 2012 |
| 1243 | DR Well Operator | | Oil Operator | Jan 1990 |
| 1244 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2024 |
| 1245 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 1246 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 1247 | Dragon Energy Corporation | | Oil & Gas Operator | Nov 2006 |
| 1248 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 1249 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Apr 2024 |
| 1250 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 1251 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 1252 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Apr 2024 |
| 1253 | Drake Energy Corporation | | Gas Operator | Dec 2023 |
| 1254 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Jan 2024 |
| 1255 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Jan 2024 |
| 1256 | Drake Oil & Gas, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 1257 | Drake Operating Company, LLC | El Dorado, AR 71730 | Oil Operator | Nov 2023 |
| 1258 | Drake Petroleum, LLC | Cypress, TX 77429 | Oil & Gas Operator | Jun 2023 |
| 1259 | Drake, Stuart | | Oil Operator | Dec 2013 |
| 1260 | Draw Oil & Gas Inc | | Oil & Gas Operator | Jun 1995 |
| 1261 | Drawings, LLC | Albuquerque, NM 87109 | Oil Operator | Jan 2024 |
| 1262 | DRD Operating Company | | Oil & Gas Operator | Feb 2014 |
| 1263 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 1264 | Dreiling Exploration LLC | Victoria, KS 67671 | Oil & Gas Operator | Dec 2023 |
| 1265 | Dreiling Limited | | Oil Operator | Jun 1984 |
| 1266 | Dreiling Oil Inc | Hays, KS 67601 | Oil Operator | Jun 2018 |
| 1267 | Dreiling Resourc | | Oil Operator | Oct 1996 |
| 1268 | Dreiling Resources Inc. | Victoria, KS 67671 | Oil Operator | Sep 1997 |
| 1269 | Drenco Oil & Gas, Inc | | Oil Operator | Feb 2024 |
| 1270 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2024 |
| 1271 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 1272 | Dresser Industrial Park, Inc. | North Tonawanda, NY 14120 | Gas Operator | Dec 2022 |
| 1273 | Drew Cornell, Inc. | | Oil & Gas Operator | Jul 1992 |
| 1274 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 1275 | Drew Cornell,Inc.-C.H.Lawrence | | Oil & Gas Operator | Sep 1990 |
| 1276 | Drew Cornell,Inc.-R Waterbury | | Oil Operator | Jun 1999 |
| 1277 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 1278 | Dreyer Oil - Lel | | Oil Operator | Nov 1993 |
| 1279 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 1280 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Nov 2023 |
| 1281 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 1282 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 1283 | Driftwood Oil Co. | Russell, KS 67665 | Oil Operator | Jan 1988 |
| 1284 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Feb 2024 |
| 1285 | Drilex Oil & Gas | | Oil Operator | Apr 1987 |
| 1286 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 1287 | Driller'S & Prod | | Oil & Gas Operator | Oct 1994 |
| 1288 | Drillers & Producers, Inc. | Newton, KS 67114 | Oil Operator | Dec 2019 |
| 1289 | Drillers LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2022 |
| 1290 | Drillex Inc | Mentor, OH 44060 | Oil & Gas Operator | Dec 2003 |
| 1291 | Drilling & Production Co. | | Oil & Gas Operator | Dec 2023 |
| 1292 | Drilling Exploration & Operating Co. Inc. | | Oil & Gas Operator | Dec 2023 |
| 1293 | Drilling, Operg & Explor, Inc. | | Oil & Gas Operator | Feb 1990 |
| 1294 | Drillmar Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | Nov 2014 |
| 1295 | Drillmar Operating Company | Houston, TX 77019 | Oil & Gas Operator | Jun 2013 |
| 1296 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Apr 2024 |
| 1297 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 1298 | Driltrol | | Oil & Gas Operator | Dec 1984 |
| 1299 | Drindak* Jon | | Oil Operator | Aug 2013 |
| 1300 | Driscoll Jerry J | | Oil Operator | Apr 1994 |