| 1101 | Ridgway Realty & Land Inc | Pepper Pike, OH 44122 | Oil & Gas Operator | Dec 2019 |
| 1102 | Ridley Oil Corporation | Tyler, TX 75702 | Oil & Gas Operator | Nov 1996 |
| 1103 | Rieke, Leo Ernest | Lenexa, KS 66219 | Oil & Gas Operator | Aug 1986 |
| 1104 | Rierson Energy, LLC | McPherson, KS 67460 | Oil & Gas Operator | Dec 2024 |
| 1105 | Rierson, Joe | McPherson, KS 67460 | Oil Operator | Dec 2024 |
| 1106 | Rietz John T & Co Inc | | Oil & Gas Operator | Mar 1992 |
| 1107 | Rif Raf Inc | Norman, OK 73069 | Oil Operator | May 1999 |
| 1108 | Rife Energy Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2025 |
| 1109 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 1110 | Rife Operating, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2005 |
| 1111 | Rife, Bud Dba B & S Gas & Oil Co | Harold, KY 41635 | Oil & Gas Operator | Dec 2023 |
| 1112 | Rife, M. O., Jr. | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 1998 |
| 1113 | Rig 6 Drilling Co., Inc. | Bronson, KS 66716 | Oil Operator | Oct 2019 |
| 1114 | Rig II LLC | Woods Cross, UT 84087 | Oil & Gas Operator | May 2018 |
| 1115 | Rig Iron Petroleum Inc | | Oil & Gas Operator | Aug 1988 |
| 1116 | Rig Iron, Inc. | | Oil & Gas Operator | Mar 1991 |
| 1117 | Rig Petroleum, LLC | Spearman, TX 79081 | Oil & Gas Operator | Apr 2025 |
| 1118 | Rig Runner Express Inc Of Texas | Kilgore, TX 75663 | Oil & Gas Operator | May 2014 |
| 1119 | Rig Runner Express, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Mar 2008 |
| 1120 | Rigel Resources Co., Inc. | | Oil Operator | Aug 2009 |
| 1121 | Rigel, Inc. | | Oil & Gas Operator | Feb 2010 |
| 1122 | Rigged Up, LLC | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 1123 | Riggins Energy Inc. | Vernon, TX 76385 | Oil & Gas Operator | Jul 2004 |
| 1124 | Riggs Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 1125 | Riggs, Don R. | San Antonio, TX 78270 | Oil & Gas Operator | Aug 2003 |
| 1126 | Riley & Scott Gas Co | Pikeville, KY 41502 | Gas Operator | Dec 2021 |
| 1127 | Riley Deborah R | Nowata, OK 74048 | Oil Operator | Dec 2024 |
| 1128 | Riley Exploration Operating Co LLC | Blanchard, OK 73010-8024 | Gas Operator | Jun 2017 |
| 1129 | Riley Exploration Opg Co, LLC | La Grange, TX 78945 | Oil & Gas Operator | Apr 2025 |
| 1130 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Apr 2025 |
| 1131 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 1132 | Riley Leo M Co | | Gas Operator | Oct 1998 |
| 1133 | Riley Permian Operating Co, LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Apr 2025 |
| 1134 | Riley Production | Throckmorton, TX 76483 | Oil & Gas Operator | Apr 2025 |
| 1135 | Riley Production, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2012 |
| 1136 | Riley Resources, Inc . | Oklahoma City, OK 73162 | Gas Operator | Dec 2024 |
| 1137 | Rim Oil Company | Hays, KS 67601 | Oil Operator | Jun 2001 |
| 1138 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2025 |
| 1139 | Rim Southwest Corp | Farmington, NM 87499-2058 | Oil & Gas Operator | Feb 2025 |
| 1140 | Rimco Oil & Gas | | Oil Operator | Mar 1987 |
| 1141 | Rimco Production Company, Inc. | | Oil & Gas Operator | Jan 2004 |
| 1142 | Rimfire Resources, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 1143 | Rimfire Swabbing, Inc. | | Oil Operator | Jan 2025 |
| 1144 | Rimrock Colony | Sunburst, MT 59482 | Gas Operator | Dec 2024 |
| 1145 | Rimrock Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2012 |
| 1146 | Rimrock Gas Company | Weatherford, OK 73096 | Oil & Gas Operator | May 2008 |
| 1147 | Rimrock Oil Company | Kalispell, MT 59901 | Oil & Gas Operator | Dec 2023 |
| 1148 | Rimrock Production Inc. | Giddings, TX 78942 | Oil & Gas Operator | Apr 2025 |
| 1149 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Jan 2025 |
| 1150 | Rinard Petroleum LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2022 |
| 1151 | Rincon Island Limited Partnership | | Oil & Gas Operator | Nov 2022 |
| 1152 | Rincon Oil & Gas LLC | Arvada, CO 80005 | Gas Operator | Jun 2022 |
| 1153 | Rincon Oil Co. | | Oil & Gas Operator | Dec 1990 |
| 1154 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Apr 2025 |
| 1155 | Rincon Production Co., Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 1997 |
| 1156 | Rine Drilling Co | | Oil & Gas Operator | Mar 1994 |
| 1157 | Rine Drillingand Exploration, Inc. | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 1158 | Rine Exploration | | Oil & Gas Operator | Jul 1994 |
| 1159 | Rine Exploration Co. | | Oil Operator | Jul 1988 |
| 1160 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 1161 | Ringer Oil Co Inc | | Oil & Gas Operator | Aug 1989 |
| 1162 | Ringneck Resources, LLC | Tulsa, OK 74135 | Gas Operator | Dec 2024 |
| 1163 | Ringo Rig LLC | Coleman, TX 76834 | Oil & Gas Operator | Apr 2025 |
| 1164 | Ringwood Gathering Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 1165 | Rio Blanco Energy, Inc. | Littleton, CO 80121 | Oil & Gas Operator | Oct 2002 |
| 1166 | Rio Blanco Operating LLC | Victoria, TX 77904 | Oil & Gas Operator | Jan 2025 |
| 1167 | Rio Bravo Expl. & Prod. Co. | Houston, TX 77055 | Oil & Gas Operator | Apr 2020 |
| 1168 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 1169 | Rio Bravo Poso | | Oil & Gas Operator | Dec 2009 |
| 1170 | Rio Bravo Production, LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2025 |
| 1171 | Rio Bravo Royalty Co. | Bandera, TX 78003 | Oil & Gas Operator | Aug 2003 |
| 1172 | Rio Chama Petroleum, Inc | Pagosa Springs, CO 81147 | Oil & Gas Operator | Apr 2004 |
| 1173 | Rio Energy | Houston, TX 77067 | Oil Operator | Apr 2025 |
| 1174 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 1175 | Rio Grand Exploration, LLC | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 1176 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 1177 | Rio Grande E&P II, LLC | Houston, TX 77092 | Gas Operator | Apr 2025 |
| 1178 | Rio Grande E&P, LLC | Houston, TX 77024 | Gas Operator | May 2022 |
| 1179 | Rio Grande Energy | Laredo, TX 78041 | Oil & Gas Operator | May 2004 |
| 1180 | Rio Interstate Oil, Inc. | Oklahoma City, OK 73189 | Oil & Gas Operator | Sep 1994 |
| 1181 | Rio Mesa Resources Inc | | Oil & Gas Operator | Jul 2022 |
| 1182 | Rio O & P LLC | Pasadena, TX 77504 | Oil Operator | Apr 2025 |
| 1183 | Rio Oil And Gas (Permian) II,LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Nov 2024 |
| 1184 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Apr 2025 |
| 1185 | Rio Rocky Enterprises, Inc. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2025 |
| 1186 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | Jan 2025 |
| 1187 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2025 |
| 1188 | Ripco | | Oil & Gas Operator | Jul 1986 |
| 1189 | Rippy Branch Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Apr 2022 |
| 1190 | Rippy Oil Company | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 1191 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2025 |
| 1192 | Risco La Sara Operations, LLC | Houston, TX 77056 | Oil & Gas Operator | Aug 2014 |
| 1193 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Apr 2025 |
| 1194 | Riseden Services, Inc. | Houston, TX 77256 | Oil & Gas Operator | Sep 1997 |
| 1195 | Riseden, LTD | | Oil & Gas Operator | Nov 1989 |
| 1196 | Risher Company, Inc. | | Oil & Gas Operator | Jul 2001 |
| 1197 | Rising Star 2000 Oil & Gas, Inc. | | Oil Operator | Dec 2024 |
| 1198 | Rising Star Energy PTR, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 1199 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 1200 | Rising Star Energy-Oper Co., LLC | | Oil & Gas Operator | Nov 2006 |