| 1101 | Long Bros. Oil Co. | | Oil Operator | Jul 2015 |
| 1102 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Dec 2024 |
| 1103 | Long Engineering Company Inc | Oklahoma City, OK 73112-7769 | Oil Operator | Jun 2008 |
| 1104 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 1105 | Long Jack Senior | | Oil Operator | Jan 2004 |
| 1106 | Long John P Jr | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2025 |
| 1107 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 1108 | Long Oil And Gas Expl., LTD | | Oil & Gas Operator | Apr 1988 |
| 1109 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 1110 | Long Petroleum, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2020 |
| 1111 | Long Phillip C | Muskogee, OK 74403 | Oil & Gas Operator | May 2013 |
| 1112 | Long Production LLC | Claremore, OK 74017-2808 | Oil & Gas Operator | Oct 2019 |
| 1113 | Long Resources Inc | San Antonio, TX 78230-2890 | Oil & Gas Operator | Feb 2025 |
| 1114 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |
| 1115 | Long Shot Oil Co. | | Oil Operator | Aug 1997 |
| 1116 | Long SR John | Avant, OK 74001 | Oil Operator | Jan 2025 |
| 1117 | Long Trust The | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2008 |
| 1118 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 1119 | Long, Edgar E. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 2011 |
| 1120 | Long, Edwin A. And Glenda | Hamilton, KS 66853 | Oil Operator | Aug 2000 |
| 1121 | Long, James A | | Oil Operator | Aug 2000 |
| 1122 | Long, Larry T. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2017 |
| 1123 | Long, Lewis C., A General Partnership | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 1124 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 1125 | Long-Tex Exploration, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2025 |
| 1126 | Longacre Oil & Gas | Enid, OK 73702 | Oil & Gas Operator | Mar 2013 |
| 1127 | Longacre-Moore Oil Co | | Oil & Gas Operator | Jun 1996 |
| 1128 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jan 2025 |
| 1129 | Longbotham Energy, LLC | Jackson, TN 38308 | Oil Operator | Apr 2025 |
| 1130 | Longbow LLC | | Oil & Gas Operator | Dec 2024 |
| 1131 | Longbranch Oil Company | Oklahoma City, OK 73154-0735 | Oil & Gas Operator | Mar 2018 |
| 1132 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 1133 | Longhorn Crude, LLC | Jetmore, KS 67854 | Oil Operator | Dec 2024 |
| 1134 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 1135 | Longhorn Mineral Corporation | Bellaire, TX 77401 | Oil & Gas Operator | May 2018 |
| 1136 | Longhorn Oil & Gas | | Oil Operator | Dec 2024 |
| 1137 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 1138 | Longhorn Oil Properties, Inc. | Pottsboro, TX 75076 | Oil & Gas Operator | Apr 2025 |
| 1139 | Longhorn Propert | | Oil Operator | Feb 1989 |
| 1140 | Longhorn Service & Drilling Co. | Kermit, TX 79745 | Oil & Gas Operator | Jun 2019 |
| 1141 | Longhurst Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 1142 | Longleaf Energy Group, Inc. | Brewton, AL 36426 | Oil & Gas Operator | Feb 2004 |
| 1143 | Longleaf Gas & Oil | | Oil Operator | May 2010 |
| 1144 | Longs Peak Resources LLC | Houston, TX 77019 | Oil & Gas Operator | Jan 2025 |
| 1145 | Longshot Energy LLC | League City, TX 77573 | Oil Operator | Apr 2025 |
| 1146 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 1147 | Longton Explorations | | Oil & Gas Operator | Dec 2024 |
| 1148 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | Jan 2025 |
| 1149 | Longview Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2002 |
| 1150 | Longville Production Co., Inc. | | Oil & Gas Operator | Sep 1995 |
| 1151 | Lonnie Ware | Wynona, OK 74084 | Oil & Gas Operator | Jan 2025 |
| 1152 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 1153 | Lor-Rob Associates L.L.C. | East Bethany, NY 14054 | Gas Operator | Dec 2023 |
| 1154 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2025 |
| 1155 | Loral Operating LLC | Sheridan, WY 82801 | Gas Operator | Apr 2011 |
| 1156 | Lord Enterprises Inc | Oklahoma City, OK 73106-5050 | Oil & Gas Operator | Sep 2000 |
| 1157 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Jan 2025 |
| 1158 | Lorenz & Bosanko | San Antonio, TX 78247 | Oil & Gas Operator | Apr 2025 |
| 1159 | Lorenz Robert M | | Oil & Gas Operator | Oct 1984 |
| 1160 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 1161 | Lorenz, J. P., Jr. | La Vernia, TX 78121 | Oil & Gas Operator | Mar 2008 |
| 1162 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 1163 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Nov 2024 |
| 1164 | Loretto, Jason C. | Alden, NY 14004 | Gas Operator | Dec 2023 |
| 1165 | Lorlan Oil Company | Wink, TX 79789 | Oil & Gas Operator | Aug 2020 |
| 1166 | Los Angeles Unified School District | | Oil Operator | Dec 2014 |
| 1167 | Losure Pet. Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2014 |
| 1168 | Losure, Ken | Borger, TX 79008 | Oil & Gas Operator | Apr 2025 |
| 1169 | Lotex Exploration & Prod. Co. | Carrollton, TX 75006 | Oil & Gas Operator | Jul 2011 |
| 1170 | Lothes John W | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 1171 | Lothian Oil Texas I, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 1172 | Loto Energy LLC | Saint Louis, MO 63105 | Oil & Gas Operator | Jan 2025 |
| 1173 | Lott Production Company | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2025 |
| 1174 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 1175 | Lottie Oil Co. | Seguin, TX 78156 | Oil & Gas Operator | Apr 1996 |
| 1176 | Lotus O&G, LLC | Mansfield, TX 76063 | Oil Operator | Apr 2025 |
| 1177 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Dec 2024 |
| 1178 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 1179 | Lou-Tex Oil & Gas Co. | | Oil & Gas Operator | Jun 1987 |
| 1180 | Loudel, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 1181 | Loudon Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2008 |
| 1182 | Loudon Operating Company, L.L.C. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 1183 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 1184 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 1185 | Louis Dreyfus Natural Gas Inc | Houston, TX 770103088 | Oil & Gas Operator | Sep 1997 |
| 1186 | Louis J. Roussel | | Oil & Gas Operator | Sep 1991 |
| 1187 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 1188 | Louisiana Delta Oil Co, LLC | | Oil & Gas Operator | Nov 2024 |
| 1189 | Louisiana Energy & Environmental, Inc. | | Oil & Gas Operator | Aug 2015 |
| 1190 | Louisiana Energy Consultant Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 1191 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1192 | Louisiana Energy Investors, L.L.C. | | Oil & Gas Operator | Jun 2016 |
| 1193 | Louisiana Fuel Oil Corporation | | Oil Operator | Aug 1997 |
| 1194 | Louisiana Gas Development Corp | | Oil & Gas Operator | Jan 2025 |
| 1195 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 1196 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 1197 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 1198 | Louisiana General Petr. Corp. | | Oil & Gas Operator | Mar 1980 |
| 1199 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 1200 | Louisiana Jordan Oil Co, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2024 |