| 1101 | Willow Run Corporation | | Oil & Gas Operator | Dec 2021 |
| 1102 | Willow Springs Prod. Serv.,LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 1997 |
| 1103 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 1104 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 1105 | Wills Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 1106 | Wills Oil Holdings, L.L.C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 1107 | Willstar Energy GP, LLC | Houston, TX 77279 | Oil & Gas Operator | Sep 2013 |
| 1108 | Wilmoth Clark Exploration & Prod LLC | Glen Campbell, PA 15742-0159 | Gas Operator | Dec 2008 |
| 1109 | Wilmoth Interests, Inc. | Marion Center, PA 15759 | Oil & Gas Operator | Mar 2025 |
| 1110 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 1111 | Wilshire Oil Co. Of Texas | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2004 |
| 1112 | Wilshire Oil LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2025 |
| 1113 | Wilson - Owens Production Co. | Longview, TX 75601 | Oil & Gas Operator | Nov 1998 |
| 1114 | Wilson Allen Dewayne | Okemah, OK 74859 | Oil & Gas Operator | Jan 2025 |
| 1115 | Wilson Brothers Leasing Co., Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2015 |
| 1116 | Wilson Charles B | | Oil & Gas Operator | Dec 1996 |
| 1117 | Wilson Charles R | Durant, OK 74701 | Oil Operator | Nov 2024 |
| 1118 | Wilson Claude And Ila | Loco, OK 73442-9404 | Oil & Gas Operator | Jan 2025 |
| 1119 | Wilson County Holdings LLC | Golden, CO 80403 | Oil Operator | Feb 2025 |
| 1120 | Wilson Energy LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 1121 | Wilson Energy Resources LLC | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 1122 | Wilson Exploration Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1996 |
| 1123 | Wilson H Drew | Collinsville, OK 74021 | Oil Operator | Feb 2025 |
| 1124 | Wilson Hydrocarbon Inc. | Houston, TX 77066 | Oil & Gas Operator | Jun 2025 |
| 1125 | Wilson Jay - Azog Inc | Malta, OH 43758 | Oil & Gas Operator | Dec 2024 |
| 1126 | Wilson Oil Co. | Houston, TX 77263 | Oil & Gas Operator | Jun 2025 |
| 1127 | Wilson Oil Compa | | Oil Operator | Dec 1986 |
| 1128 | Wilson Oil Properties, LLC | Winfield, KS 67156 | Oil Operator | Nov 2009 |
| 1129 | Wilson Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Jun 2025 |
| 1130 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2025 |
| 1131 | Wilson Operating Service Inc | Brownfield, TX 79316 | Oil & Gas Operator | Aug 2003 |
| 1132 | Wilson Petroleum Co. | Springfield, MO 65803 | Oil & Gas Operator | Jun 2025 |
| 1133 | Wilson Petroleum Corp | Westerville, OH 43081 | Oil & Gas Operator | Dec 2000 |
| 1134 | Wilson Production Co Of La,Inc | | Oil & Gas Operator | Apr 1991 |
| 1135 | Wilson Resources, Inc. | Longview, TX 75601 | Oil & Gas Operator | Jun 2025 |
| 1136 | Wilson Richard A | | Oil Operator | Dec 2009 |
| 1137 | Wilson Robert P | | Gas Operator | Dec 1996 |
| 1138 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 1139 | Wilson Well Service Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Jun 2025 |
| 1140 | Wilson, Billy R. | New Braunfels, TX 78130 | Oil & Gas Operator | Jun 2025 |
| 1141 | Wilson, Brian K | Fairmont, WV 26554-0148 | Oil & Gas Operator | Dec 2018 |
| 1142 | Wilson, Bruce Oil Inc | Columbia, KY 42728 | Oil Operator | Dec 2023 |
| 1143 | Wilson, Charles B., Jr., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2000 |
| 1144 | Wilson, Clay S | | Oil Operator | Feb 2025 |
| 1145 | Wilson, David A. | Longview, TX 75606 | Oil & Gas Operator | Mar 1997 |
| 1146 | Wilson, Dewey | Coleman, TX 76834 | Oil & Gas Operator | Nov 2007 |
| 1147 | Wilson, Don H., Inc. | Elkhart, TX 75839 | Oil & Gas Operator | May 2019 |
| 1148 | Wilson, Ernest L | Morganfield, KY 42437 | Oil Operator | Dec 2023 |
| 1149 | Wilson, Jerry L. | Ranger, TX 76470 | Oil & Gas Operator | Jun 2025 |
| 1150 | Wilson, Olan Max | Cisco, TX 76437 | Oil & Gas Operator | Jun 2025 |
| 1151 | Wilson, Paul E Jr | | Oil & Gas Operator | Dec 2021 |
| 1152 | Wilson, Steven R. | | Gas Operator | Dec 2021 |
| 1153 | Wilson, W R | | Oil & Gas Operator | Feb 2025 |
| 1154 | Wilson, W. Corp. | Midland, TX 79705 | Oil & Gas Operator | Mar 1999 |
| 1155 | Wilson, W.W. Jr. Properties | Abilene, TX 79605 | Oil & Gas Operator | Jul 1995 |
| 1156 | Wilson, Warren C | | Oil Operator | Feb 2025 |
| 1157 | Wilson, WM. B. Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 1158 | Wilson-Raczka, Diane R. | Irving, NY 14081 | Gas Operator | Dec 2023 |
| 1159 | Wilson-Shab Corp. | Electra, TX 76360 | Oil & Gas Operator | Jun 2025 |
| 1160 | Wilton Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Apr 1999 |
| 1161 | Wilton Petroleum | | Oil & Gas Operator | Jun 1985 |
| 1162 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Feb 2025 |
| 1163 | Wilton, Frank | Graham, TX 76450 | Oil & Gas Operator | Oct 2016 |
| 1164 | Wimberley Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2013 |
| 1165 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 1166 | Wimco | Dallas, TX 75229 | Oil & Gas Operator | Jul 2008 |
| 1167 | Wimsco, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 1994 |
| 1168 | Wimsett Kenneth | | Oil Operator | Apr 1989 |
| 1169 | Win Oil Company | Russell, KS 67665 | Oil & Gas Operator | Jul 2021 |
| 1170 | Winbeau Oil & Gas Co. | | Oil & Gas Operator | Oct 2013 |
| 1171 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Jun 2025 |
| 1172 | Winchester Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 1173 | Winchester Exploration, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Aug 2003 |
| 1174 | Winchester Oil & Gas LLC | Katy, TX 77449 | Oil Operator | Jun 2025 |
| 1175 | Winchester Oil Corporation | Maysville, OK 73057-0600 | Oil & Gas Operator | Apr 2010 |
| 1176 | Winchester Operating, Inc. | Bryan, TX 77808 | Oil & Gas Operator | Aug 2001 |
| 1177 | Winchester Production Co., LTD. | Shreveport, LA 71129 | Oil & Gas Operator | Sep 2008 |
| 1178 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 1179 | Winco Of Kansas | Kechi, KS 67067 | Oil Operator | Aug 1982 |
| 1180 | Winco Oil Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jun 2025 |
| 1181 | Winco Petroleum Company | Richardson, TX 75080 | Oil & Gas Operator | Jan 2003 |
| 1182 | Winco Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
| 1183 | Wind River Energy Commission | | Oil Operator | Apr 2025 |
| 1184 | Wind River Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 1185 | Wind River Exploration | Powell, WY 82435 | Oil & Gas Operator | Apr 2025 |
| 1186 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Feb 2025 |
| 1187 | Wind River Oil & Gas, Inc. | Jackson, WY 83002 | Oil Operator | Aug 2000 |
| 1188 | Wind River Resources Corp | Park City, UT 84098 | Oil & Gas Operator | Jan 2020 |
| 1189 | Wind River Resources Inc | Tulsa, OK 74136-6381 | Oil & Gas Operator | Jun 2010 |
| 1190 | Winder Oil Company | | Oil Operator | Feb 2025 |
| 1191 | Windfall Oil & Gas Inc | Falls Creek, PA 15840-2617 | Gas Operator | Dec 2024 |
| 1192 | Windfohr Oil Company | | Oil & Gas Operator | May 1980 |
| 1193 | Windgate Oil Com | | Oil Operator | Jul 1985 |
| 1194 | Windham Oil Company | | Oil & Gas Operator | Dec 1987 |
| 1195 | Windham Oil Corp. | | Oil & Gas Operator | Dec 2024 |
| 1196 | Windham Resources | Abilene, TX 79608 | Oil & Gas Operator | Jun 2025 |
| 1197 | Windham Resources, Inc. | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2004 |
| 1198 | Windham, L. E. | Rankin, TX 79778 | Oil & Gas Operator | Dec 1996 |
| 1199 | Windham, L.E. Estate Of | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 1200 | Windler-Doudna, A General Partnership | | Oil Operator | Sep 2000 |