| 1101 | Dominy Oil Co., Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 1999 |
| 1102 | Don Bar Investment Company | Windthorst, TX 76389 | Oil & Gas Operator | Feb 2004 |
| 1103 | Don Byers Oil & Gas LLC | Heath, OH 43056 | Oil & Gas Operator | Dec 2024 |
| 1104 | Don Erbert Oil Company | | Oil Operator | Oct 2013 |
| 1105 | Don G. Wiley, Jr. | | Oil Operator | Dec 1979 |
| 1106 | Don Karst Well Service, Inc. | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 1107 | Don Peterson Company, LLC - | Loving, TX 76460 | Oil Operator | Sep 2025 |
| 1108 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 1109 | Don Sims Oil | | Oil Operator | Apr 2025 |
| 1110 | Don Townes | | Oil Operator | Sep 2000 |
| 1111 | Don W. Holcomb | | Oil Operator | Feb 1996 |
| 1112 | Don Webb | | Oil Operator | Mar 1984 |
| 1113 | Don Yohe Enterprises And Devonian Energy Inc | | Gas Operator | Dec 1999 |
| 1114 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Apr 2018 |
| 1115 | Don'S Oil Company Inc | Oxford, KS 67119-0006 | Oil Operator | Apr 2011 |
| 1116 | Don-Dale, Inc. | Clarksville, TX 75426 | Oil & Gas Operator | Aug 2003 |
| 1117 | Donahue Pipeline Construction, Inc. | Branchland, WV 25506 | Gas Operator | Dec 2021 |
| 1118 | Donaker Alan M | Warsaw, OH 43844 | Oil & Gas Operator | Dec 1994 |
| 1119 | Donald & Danny Dews Production | | Oil Operator | Jan 2025 |
| 1120 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 1121 | Donald C. Ring Revocable Trust | Sebring, FL 33875 | Gas Operator | Dec 2024 |
| 1122 | Donald C. Slawson | | Oil Operator | Jun 1985 |
| 1123 | Donald E & Janet L Rearick | Ford City, PA 16226-9801 | Gas Operator | Dec 2024 |
| 1124 | Donald J. Zadeck | | Oil & Gas Operator | Feb 1998 |
| 1125 | Donald Len Barreth | | Oil & Gas Operator | Dec 1991 |
| 1126 | Donald Owens | | Oil & Gas Operator | Dec 2024 |
| 1127 | Donaldson Richard E | Bartlesville, OK 74005-0032 | Oil & Gas Operator | Nov 2005 |
| 1128 | Donalu Oil | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 1129 | Doneghy James | Wellington, TX 79095 | Oil & Gas Operator | May 2013 |
| 1130 | Donke Oil & Gas, LLC | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2018 |
| 1131 | Donn G. Thompson, Et Al | | Oil Operator | Apr 1987 |
| 1132 | Donna Lee Oil Co | Independence, KS 67301 | Oil & Gas Operator | Apr 2014 |
| 1133 | Donna-Lynne Oil Co. | George West, TX 78022 | Oil & Gas Operator | Jun 2018 |
| 1134 | Donnell Pipe & Supply Co/TX Corp | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 1135 | Donnell, Bill | Graham, TX 76450 | Oil & Gas Operator | May 1995 |
| 1136 | Donnell, Louis, Jr. | South Bend, TX 76481 | Oil & Gas Operator | Mar 2008 |
| 1137 | Donnelly Casing Pulling Co | | Oil Operator | Aug 2020 |
| 1138 | Donnie R. Morrow | | Oil Operator | Dec 2024 |
| 1139 | Donny Joe Barnhill | | Gas Operator | Dec 2024 |
| 1140 | Donoco Oil Company | La Vernia, TX 78121 | Oil & Gas Operator | Sep 2025 |
| 1141 | Donovan Joe D Or L P McElwaine | Tulsa, OK 74119 | Gas Operator | Jan 2014 |
| 1142 | Donray Petroleum LLC | Choctaw, OK 73020 | Oil & Gas Operator | May 2025 |
| 1143 | Donson Corporation | Edmond, OK 73083-0341 | Oil & Gas Operator | Jul 1997 |
| 1144 | Doodlebug Oil Co | | Oil Operator | Jun 2006 |
| 1145 | Doolaree Corporation | Sherman, TX 75091 | Oil & Gas Operator | Sep 2025 |
| 1146 | Dooley Oil | Cushing, OK 74023 | Oil Operator | May 2025 |
| 1147 | Dooley, Jeff | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2012 |
| 1148 | Doonan & Sons In | | Oil Operator | Apr 1995 |
| 1149 | Doonan And Sons, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2021 |
| 1150 | Dora Inc | Levelland, TX 79336 | Oil & Gas Operator | Jul 2019 |
| 1151 | Dorado Drilling, Inc. | Gulfport, MS 39501 | Oil & Gas Operator | Sep 2025 |
| 1152 | Dorado E & P Partners LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 1153 | Dorado Energy LLC | Edmond, OK 73012 | Oil & Gas Operator | Jan 2021 |
| 1154 | Dorado Gas Resources LLC | Centennial, CO 80112 | Oil & Gas Operator | Jul 2009 |
| 1155 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 1156 | Dorado Operating Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2011 |
| 1157 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 1158 | Doralex Energy I | | Oil & Gas Operator | Feb 1995 |
| 1159 | Doralex Energy, Inc. | San Angelo, TX 76904 | Oil Operator | Feb 2000 |
| 1160 | Doran & Associates | Pittsburgh, PA 15220 | Oil & Gas Operator | Dec 1988 |
| 1161 | Doran & Braddock & Nelson Petr | | Oil Operator | Feb 1982 |
| 1162 | Doran And Braddock | | Oil & Gas Operator | Nov 1984 |
| 1163 | Dorbert Oil & Gas, Inc. | | Gas Operator | Aug 1988 |
| 1164 | Dorcheat Oil & Gas, LLC | | Oil & Gas Operator | Dec 2024 |
| 1165 | Dorchester Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 2001 |
| 1166 | Dorchester Hugot | | Gas Operator | Sep 1993 |
| 1167 | Dorchester Hugoton LTD | Garland, TX 75042-8212 | Oil & Gas Operator | Mar 2004 |
| 1168 | Dorchester Minerals Operating LP | Dallas, TX 75219 | Oil & Gas Operator | Jun 2022 |
| 1169 | Dorchester Operating Company LLC | Refugio, TX 78377 | Oil & Gas Operator | Sep 2025 |
| 1170 | Dorchester Resources LP | Oklahoma City, OK 73154-8879 | Oil & Gas Operator | Aug 2021 |
| 1171 | Dore Corporation | Amarillo, TX 79119 | Gas Operator | Jun 2010 |
| 1172 | Dore Energy Co., LTD. | Amarillo, TX 79101 | Gas Operator | Sep 2025 |
| 1173 | Dore-Dyn Production Co., Inc. | | Oil & Gas Operator | Jul 1993 |
| 1174 | Dorel Inc | | Oil Operator | Apr 2001 |
| 1175 | Dorey Oil Corporation | Healdton, OK 73438-0856 | Oil Operator | Apr 2014 |
| 1176 | Dorfman Production Company | Beloit, OH 44609 | Oil & Gas Operator | Sep 2025 |
| 1177 | Dorfs Drilling Company | Waurika, OK 73573 | Oil & Gas Operator | Nov 2024 |
| 1178 | Dorland, D. L. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 1179 | Dorland, D. L. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Nov 1994 |
| 1180 | Dorland, D. L. Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 1994 |
| 1181 | Dorondoco Operating Co., Inc. | Brownwood, TX 76801 | Oil & Gas Operator | May 1994 |
| 1182 | Dorothy Boyce | Artesia, NM 88210 | Oil & Gas Operator | Sep 2000 |
| 1183 | Dorothy F. Hamlin | | Oil Operator | Dec 1985 |
| 1184 | Dorothy Oil Company | | Oil & Gas Operator | Oct 1994 |
| 1185 | Dorough, Lee Operations | Orlando, FL 32801 | Oil & Gas Operator | Sep 2025 |
| 1186 | Dorr, John R. | Pecos, TX 79772 | Oil & Gas Operator | Sep 2025 |
| 1187 | Dorsey Oil & Gas LLC | Nashport, OH 43830 | Oil & Gas Operator | Dec 2024 |
| 1188 | Dorso Energy | Wexford, PA 15090 | Oil & Gas Operator | Dec 2004 |
| 1189 | Dorso LLC | Wexford, PA 15090-8758 | Oil & Gas Operator | Dec 2005 |
| 1190 | Dorso LP | Wexford, PA 15090-8314 | Oil & Gas Operator | Dec 2024 |
| 1191 | Dorward Energy Corporation | Saint Petersburg, FL 33701-3255 | Oil & Gas Operator | Dec 2024 |
| 1192 | Dos Cicadas | Miles, TX 76861 | Oil & Gas Operator | Sep 2025 |
| 1193 | Dos Lobos Oil Co. | | Oil Operator | Dec 1999 |
| 1194 | Dos Rios Inc. | | Gas Operator | Jun 2025 |
| 1195 | Dossie Dews | | Oil & Gas Operator | Dec 2024 |
| 1196 | Dotson Floyd | | Oil Operator | Dec 1980 |
| 1197 | Dotson Jack M Operating Co | Norman, OK 73072-6649 | Oil Operator | Oct 1993 |
| 1198 | Dotson, Robert M | | Oil Operator | Dec 2020 |
| 1199 | Doty, Tim | Sedan, KS 67361 | Oil Operator | Dec 2009 |
| 1200 | Double "C" Energy | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |