| 1101 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 1102 | D&S Oil & Gas Operators, Inc. | | Oil & Gas Operator | Dec 2020 |
| 1103 | D-Mop Investments, L.L.C. | | Gas Operator | Jan 2024 |
| 1104 | D-O-R Lease Service, Inc. | | Oil & Gas Operator | Mar 2009 |
| 1105 | D-Ram Construction Co., Inc. | | Gas Operator | Dec 1990 |
| 1106 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 1107 | D-Tec Well Production LLC | | Oil Operator | Dec 2024 |
| 1108 | D. A. Biglane | | Oil & Gas Operator | Feb 1990 |
| 1109 | D. A. Milton | | Oil & Gas Operator | Dec 2016 |
| 1110 | D. B. Braddock | | Oil & Gas Operator | Jan 1986 |
| 1111 | D. B. Braddock-Kisatchie Res. | | Oil & Gas Operator | Jan 1985 |
| 1112 | D. B. McClinton | | Oil & Gas Operator | Jun 1992 |
| 1113 | D. B. McConnell | | Oil & Gas Operator | Oct 1991 |
| 1114 | D. B. McConnell Et Al | | Oil & Gas Operator | Nov 1993 |
| 1115 | D. C. Bintliff | | Oil & Gas Operator | Mar 1987 |
| 1116 | D. C. Bintliff Et Al | | Oil & Gas Operator | Feb 1987 |
| 1117 | D. C. Bintliff-McCormick O&G | | Oil & Gas Operator | Oct 1983 |
| 1118 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Feb 2026 |
| 1119 | D. I. Dupree | | Oil & Gas Operator | Sep 2015 |
| 1120 | D. J. Fritz | | Oil & Gas Operator | Feb 1982 |
| 1121 | D. J. Simmons & Co. Of La. | | Gas Operator | Nov 1996 |
| 1122 | D. L. & Barbara W. Chiles | | Oil Operator | Jan 2025 |
| 1123 | D. L. Gish | | Oil Operator | Mar 1992 |
| 1124 | D. L. Gish Oil Partnership | | Oil Operator | Feb 1989 |
| 1125 | D. L. Gish Oil, Inc. | | Oil Operator | Jul 1998 |
| 1126 | D. L. Gish, Inc. | | Oil Operator | Jun 1990 |
| 1127 | D. L. Trainer | | Oil Operator | Mar 1991 |
| 1128 | D. S. Owens | | Oil & Gas Operator | Dec 1991 |
| 1129 | D. W. Chumley, Jr. | | Oil & Gas Operator | Dec 2024 |
| 1130 | D. W. Tanner | | Oil & Gas Operator | May 2000 |
| 1131 | D.C.Bintliff-McCormick Oper Co | | Oil & Gas Operator | May 1984 |
| 1132 | D.J.F. Petroleum Corporation | | Oil & Gas Operator | Oct 1992 |
| 1133 | D90 Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2026 |
| 1134 | Dac Oil Corporation | | Oil & Gas Operator | Dec 1985 |
| 1135 | Dailey Oil And Gas LLC | | Oil & Gas Operator | Jun 2019 |
| 1136 | Dal-Long Oil Company | Longview, TX 75608 | Oil Operator | Feb 2001 |
| 1137 | Dalco Petroleum Inc | | Oil & Gas Operator | Jan 2006 |
| 1138 | Dale Expl Co & R. A. Campbell | | Oil Operator | Nov 1995 |
| 1139 | Dale Exploration Co. | | Oil & Gas Operator | May 2004 |
| 1140 | Dale O. Reese | | Oil Operator | Nov 1989 |
| 1141 | Dale O. Reese, Inc. | | Oil Operator | Jul 1997 |
| 1142 | Dale Operating Company | Dallas, TX 75207 | Oil & Gas Operator | Feb 2026 |
| 1143 | Daleco Resources | | Gas Operator | Dec 2000 |
| 1144 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1145 | Dallas DRLG. & Development Co. | | Oil & Gas Operator | Apr 1987 |
| 1146 | Dallas Production Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 1147 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 1148 | Dalnor Corporation | | Oil & Gas Operator | Nov 2010 |
| 1149 | Dalton J. Woods | | Oil & Gas Operator | Dec 1985 |
| 1150 | Damian Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1151 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 1152 | Damson-Franks-McCord-Goodrich | | Oil & Gas Operator | Aug 1984 |
| 1153 | Dan A. Hughes Company | | Oil & Gas Operator | Dec 2005 |
| 1154 | Dan A. Hughes Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Dec 2025 |
| 1155 | Dan Owens | | Oil & Gas Operator | Jul 1993 |
| 1156 | Daniel Oil Company | | Oil & Gas Operator | Jan 1983 |
| 1157 | Danny Glass | | Oil Operator | Jan 1987 |
| 1158 | Danos Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 1159 | Dant Operating Company Inc. | | Oil & Gas Operator | Jan 1989 |
| 1160 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 1161 | Dardan Expl Inc-H Edison Ellis | | Oil & Gas Operator | Apr 1990 |
| 1162 | Darsey Operating Corporation | | Oil & Gas Operator | Sep 1990 |
| 1163 | Dave Easom Production Co. Inc. | | Oil & Gas Operator | May 2000 |
| 1164 | Dave'S Production | | Oil Operator | Dec 2024 |
| 1165 | Davenport Production Corp. | | Oil Operator | Sep 1988 |
| 1166 | David A. Robinson | | Oil Operator | Jan 1999 |
| 1167 | David Crow | | Oil & Gas Operator | Nov 1985 |
| 1168 | David Crow Trustee Et Al | | Oil & Gas Operator | Jan 1986 |
| 1169 | David Divine Production | | Oil & Gas Operator | Nov 1997 |
| 1170 | David L. Whittington | | Gas Operator | Dec 1998 |
| 1171 | David L. Whittington Inc | | Gas Operator | Sep 2022 |
| 1172 | David Lynn Chiles | | Oil & Gas Operator | Aug 2020 |
| 1173 | David New Operating Co. Inc. | | Oil & Gas Operator | Feb 1999 |
| 1174 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 1175 | Davis & Kaiser Operating, Inc. | | Oil Operator | May 2004 |
| 1176 | Davis And Backus | | Oil Operator | Nov 1999 |
| 1177 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 1178 | Davis Gulf Coast, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 1179 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 1180 | Davis Oil Company-Cox | | Oil & Gas Operator | Aug 1980 |
| 1181 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 1182 | Davis-Goodman Oil Company | | Oil & Gas Operator | Jun 1980 |
| 1183 | Davis-Goodman-Medders | | Oil & Gas Operator | Jun 1980 |
| 1184 | Dawson Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 1185 | Day Dreams Resources, LLC | | Oil & Gas Operator | Dec 2025 |
| 1186 | Day Town Operating, LLC | | Oil & Gas Operator | Jan 2025 |
| 1187 | Daybreak Oil And Gas, Inc. | | Oil & Gas Operator | Dec 2025 |
| 1188 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Feb 2026 |
| 1189 | Daymon Martin | | Oil Operator | Mar 1983 |
| 1190 | DBL DRLG.&Prod. Services, Inc. | | Oil & Gas Operator | Jul 1997 |
| 1191 | DCP Midstream, LLC | | Oil Operator | Jun 2016 |
| 1192 | DCP, Inc. | | Oil & Gas Operator | Jun 1990 |
| 1193 | DDC & T Operating Company, Inc | | Oil & Gas Operator | Jul 2005 |
| 1194 | Dean Enterprises, Inc. | | Oil & Gas Operator | Jun 2019 |
| 1195 | Dean Petroleum | | Oil & Gas Operator | Jun 2000 |
| 1196 | Debbie Carroll | | Oil & Gas Operator | Apr 1999 |
| 1197 | Debeaux - Flores | | Oil & Gas Operator | Jan 2025 |
| 1198 | Deblin Oil & Gas, Inc | | Oil & Gas Operator | Aug 1995 |
| 1199 | Deblin Operating LTD | | Oil & Gas Operator | Jan 1997 |
| 1200 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |