| 1201 | River Bend Operating, Inc. | | Oil & Gas Operator | Jul 1999 |
| 1202 | River City Resources Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 1997 |
| 1203 | River Energy Co., Inc. | | Gas Operator | Dec 2012 |
| 1204 | River Gas Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1205 | River Gas Corporation | Tuscaloosa, AL 35406-2233 | Gas Operator | Dec 2000 |
| 1206 | River Gas Of Utah Inc | Northport, AL 35476 | Gas Operator | Feb 1995 |
| 1207 | River Ridge Gravel Co | Meadville, PA 16335-9149 | Oil Operator | Dec 2024 |
| 1208 | River Road Production, LLC | Hays, KS 67601 | Oil Operator | Feb 1997 |
| 1209 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 1210 | River Rouge Minerals | | Oil & Gas Operator | Dec 2024 |
| 1211 | River Rouge Minerals Inc | | Oil & Gas Operator | Mar 1981 |
| 1212 | River Valley Energy Inc | Little Hocking, OH 45742 | Oil & Gas Operator | Dec 2024 |
| 1213 | River Valley Oil LLC | Konawa, OK 74849 | Oil Operator | May 2025 |
| 1214 | Rivercity Operating, Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2025 |
| 1215 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Apr 2025 |
| 1216 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 1217 | Riverine, L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2021 |
| 1218 | Rivershore Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 1219 | Riverside Energy Michigan LLC | | Oil & Gas Operator | May 2025 |
| 1220 | Riverside Oil & Gas, Inc | Burkesville, KY 42717 | Oil & Gas Operator | Dec 2023 |
| 1221 | Riverside Petrol | | Oil Operator | Sep 1995 |
| 1222 | Riverside Petroleum & Prod. | Oxford, MS 38655 | Oil & Gas Operator | Dec 2023 |
| 1223 | Riverside Resources, Inc. | | Oil & Gas Operator | Oct 2015 |
| 1224 | Riverstone Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | May 2025 |
| 1225 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Jul 2025 |
| 1226 | Riverwood Production Co., Inc. | | Oil & Gas Operator | Nov 1990 |
| 1227 | Rives Owen H | Holdenville, OK 74848-0913 | Oil & Gas Operator | Nov 2000 |
| 1228 | Riviera Drilling & Exploration Company | | Oil & Gas Operator | Sep 2013 |
| 1229 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 1230 | Rixleben Jeffrey | West Chicago, IL 60186-0978 | Oil Operator | Feb 2016 |
| 1231 | Rixleben Thomas B Estate | Ada, OK 74820 | Oil & Gas Operator | Mar 2014 |
| 1232 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Mar 2025 |
| 1233 | RJ Schreiner SR | Freedom, PA 15042-9353 | Oil & Gas Operator | Dec 2015 |
| 1234 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | May 2025 |
| 1235 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | May 2025 |
| 1236 | RJD Management Co., Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Jul 2025 |
| 1237 | RJKB Foster Operating LLC | Cisco, TX 76437 | Oil & Gas Operator | Jul 2025 |
| 1238 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Mar 2025 |
| 1239 | RJM Oil Company, LLC | Irving, TX 75060 | Oil Operator | Jul 2025 |
| 1240 | RJW Oil And Gas, LLC | Cross Lane, WV 25313 | Oil & Gas Operator | Dec 2023 |
| 1241 | RK Petroleum Corp,Enex Res,Peninsular Oil Corp. | | Oil Operator | Dec 2024 |
| 1242 | Rki Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2021 |
| 1243 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 1244 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | May 2025 |
| 1245 | RKR Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Apr 2025 |
| 1246 | RKW Operating LLC | Weatherford, TX 76085 | Gas Operator | Jul 2025 |
| 1247 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Mar 2025 |
| 1248 | RL&B Energy LLC | Wichita Falls, TX 76230 | Oil & Gas Operator | Apr 2025 |
| 1249 | RLB Enterprises, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Feb 1997 |
| 1250 | RLB Investments LLC | Holdenville, OK 74848-9421 | Oil Operator | Jul 2017 |
| 1251 | RLM Energy Company Inc. | Monroe, LA 71201 | Oil & Gas Operator | Mar 2008 |
| 1252 | RLP Gulf States, L.L.C. | | Oil & Gas Operator | Apr 2012 |
| 1253 | RLS Oil Company | Tulia, TX 79088 | Oil & Gas Operator | Jul 2025 |
| 1254 | RLS Partnership | | Oil Operator | Apr 1983 |
| 1255 | RLT Investment | Morland, KS 67650 | Oil Operator | Mar 2009 |
| 1256 | Rlu Oil & Gas, Inc. | Devine, TX 78016 | Oil & Gas Operator | Jul 2025 |
| 1257 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | Jul 2025 |
| 1258 | RM Energy LTD Liab. Co. | Casper, WY 82602 | Gas Operator | Mar 2009 |
| 1259 | RMB Corporation | Senecaville, OH 43780 | Oil & Gas Operator | Dec 2016 |
| 1260 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2025 |
| 1261 | RMC Petroleum, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 1996 |
| 1262 | Rme Austin Chalk Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2002 |
| 1263 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 1264 | Rmi Company | Niles, OH 44446 | Oil & Gas Operator | Dec 1984 |
| 1265 | Rmor Production | Kilgore, TX 75662 | Oil Operator | Jul 2025 |
| 1266 | RMR Drilling Com | | Oil Operator | Sep 1988 |
| 1267 | RMR Energy Resources | | Oil Operator | Apr 2025 |
| 1268 | RMR Oil Company | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2005 |
| 1269 | RMR Operating, LLC | Plano, TX 75024 | Oil & Gas Operator | Jul 2025 |
| 1270 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 1271 | RMT Resources LLC | | Oil Operator | Jan 2025 |
| 1272 | RMX Oil & Gas, LLC | Zapata, TX 78076 | Oil Operator | Jul 2025 |
| 1273 | RNS Oil Co. | Rio Grande Ci, TX 78582 | Oil Operator | Jul 2025 |
| 1274 | Ro-Jo, Inc. | Highland VLG, TX 75077 | Oil & Gas Operator | Aug 2003 |
| 1275 | Roach & Assoc Inc | Pittsburgh, PA 15228-1924 | Gas Operator | Dec 2024 |
| 1276 | Roach, R. Byron Trustee | Judson, TX 75660 | Oil & Gas Operator | Mar 1999 |
| 1277 | Roach, R. Byron, Trustee, LLC | Judson, TX 75660 | Oil & Gas Operator | Mar 2007 |
| 1278 | Road Oil Sales Inc. | Tyler, TX 75711 | Oil Operator | Dec 1984 |
| 1279 | Road Runner Inc | Park City, UT 84060 | Oil & Gas Operator | Aug 2005 |
| 1280 | Roadrunner Energy | | Oil Operator | Sep 2005 |
| 1281 | Roadrunner Energy, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Jan 2025 |
| 1282 | Roan Resources LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Apr 2024 |
| 1283 | Roanoke Corporation | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 1995 |
| 1284 | Roaring Springs Energy, LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2010 |
| 1285 | Roark S L | | Oil & Gas Operator | Nov 1992 |
| 1286 | Roark, Nancy | Winfield, KS 67156 | Oil Operator | Dec 2004 |
| 1287 | Rob-Joe Gas & Oil Co. | Ranger, TX 76470 | Oil & Gas Operator | Jul 2025 |
| 1288 | Robbins Energy, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1994 |
| 1289 | Robbins Petroleum Corp. | Longview, TX 75606 | Oil & Gas Operator | Sep 1994 |
| 1290 | Robbins Thomas D & Charlene A Revocable Trust | Plano, TX 75093-7471 | Oil Operator | Jul 2018 |
| 1291 | Robbins, Jesse M. | Jamestown, NY 14701 | Gas Operator | Dec 2024 |
| 1292 | Robbins, L. C. | Seguin, TX 78155 | Oil & Gas Operator | Aug 2003 |
| 1293 | Robby Kohutek, Inc. | Ballinger, TX 76821 | Oil & Gas Operator | Jul 2025 |
| 1294 | Robco Investments, Inc. | | Oil & Gas Operator | Jul 2016 |
| 1295 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 1296 | Roberson Farm Equipment, Inc. | | Oil Operator | Mar 1989 |
| 1297 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 1298 | Roberson Well Service | | Gas Operator | Dec 2024 |
| 1299 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 1300 | Robert A Craig | | Oil Operator | Jul 2020 |