| 25301 | Rio Grande Energy | Laredo, TX 78041 | Oil & Gas Operator | May 2004 |
| 25302 | Rio Interstate Oil, Inc. | Oklahoma City, OK 73189 | Oil & Gas Operator | Sep 1994 |
| 25303 | Rio Mesa Resources Inc | | Oil & Gas Operator | Jul 2022 |
| 25304 | Rio O & P LLC | Pasadena, TX 77504 | Oil Operator | Apr 2025 |
| 25305 | Rio Oil And Gas (Permian) II,LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Nov 2024 |
| 25306 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Apr 2025 |
| 25307 | Rio Rocky Enterprises, Inc. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2025 |
| 25308 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | Jan 2025 |
| 25309 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2025 |
| 25310 | Ripco | | Oil & Gas Operator | Jul 1986 |
| 25311 | Rippy Branch Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Apr 2022 |
| 25312 | Rippy Oil Company | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 25313 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2025 |
| 25314 | Risco La Sara Operations, LLC | Houston, TX 77056 | Oil & Gas Operator | Aug 2014 |
| 25315 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Apr 2025 |
| 25316 | Riseden Services, Inc. | Houston, TX 77256 | Oil & Gas Operator | Sep 1997 |
| 25317 | Riseden, LTD | | Oil & Gas Operator | Nov 1989 |
| 25318 | Risher Company, Inc. | | Oil & Gas Operator | Jul 2001 |
| 25319 | Rising Star 2000 Oil & Gas, Inc. | | Oil Operator | Dec 2024 |
| 25320 | Rising Star Energy PTR, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2025 |
| 25321 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 25322 | Rising Star Energy-Oper Co., LLC | | Oil & Gas Operator | Nov 2006 |
| 25323 | Rising Star Petroleum, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2010 |
| 25324 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 25325 | Ristau Ricky J | Warren, PA 16365-3560 | Oil & Gas Operator | Dec 2024 |
| 25326 | Rister Oil&Gas International LLC | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 25327 | Rister, Dewey | Avoca, TX 79503 | Oil & Gas Operator | Apr 2025 |
| 25328 | Ritchie C Stewar | | Oil Operator | Aug 1982 |
| 25329 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 25330 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 25331 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Feb 2025 |
| 25332 | Ritchie Petroleum Corporation, Inc. | Pennsboro, WV 26415-0000 | Oil & Gas Operator | Dec 2021 |
| 25333 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 25334 | Ritchie, H. G. Jr. | Taft, TX 78390 | Oil & Gas Operator | Apr 2025 |
| 25335 | Ritco, Inc | Barackville, WV 26559 | Oil & Gas Operator | Dec 2021 |
| 25336 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 25337 | Ritter Properties, LTD. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2025 |
| 25338 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | Oct 2024 |
| 25339 | Rivendell Group LLC | Pebble Beach, CA 93953-1479 | Oil Operator | Sep 2018 |
| 25340 | River Bend Operating, Inc. | | Oil & Gas Operator | Jul 1999 |
| 25341 | River City Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 1997 |
| 25342 | River Energy Co., Inc. | | Gas Operator | Dec 2012 |
| 25343 | River Gas Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 25344 | River Gas Corporation | Tuscaloosa, AL 35406-2233 | Gas Operator | Dec 2000 |
| 25345 | River Gas Of Utah Inc | Northport, AL 35476 | Gas Operator | Feb 1995 |
| 25346 | River Ridge Gravel Co | Meadville, PA 16335-9149 | Oil Operator | Dec 2024 |
| 25347 | River Road Production, LLC | Hays, KS 67601 | Oil Operator | Feb 1997 |
| 25348 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 25349 | River Rouge Minerals | | Oil & Gas Operator | Dec 2024 |
| 25350 | River Rouge Minerals Inc | | Oil & Gas Operator | Mar 1981 |
| 25351 | River Valley Energy Inc | Little Hocking, OH 45742 | Oil & Gas Operator | Dec 2024 |
| 25352 | River Valley Oil LLC | Konawa, OK 74849 | Oil Operator | Feb 2025 |
| 25353 | Rivercity Operating, Inc. | Austin, TX 78766 | Oil & Gas Operator | Apr 2025 |
| 25354 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Jan 2025 |
| 25355 | Riveria Drilling | | Oil Operator | Aug 1984 |
| 25356 | Riverine, L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2021 |
| 25357 | Rivershore Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 25358 | Riverside Energy Michigan LLC | | Oil & Gas Operator | Feb 2025 |
| 25359 | Riverside Oil & Gas, Inc | Burkesville, KY 42717 | Oil & Gas Operator | Dec 2023 |
| 25360 | Riverside Petrol | | Oil Operator | Sep 1995 |
| 25361 | Riverside Petroleum & Prod. | Oxford, MS 38655 | Oil & Gas Operator | Dec 2023 |
| 25362 | Riverside Resources, Inc. | | Oil & Gas Operator | Oct 2015 |
| 25363 | Riverstone Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Feb 2025 |
| 25364 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2025 |
| 25365 | Riverwood Production Co., Inc. | | Oil & Gas Operator | Nov 1990 |
| 25366 | Rives Owen H | Holdenville, OK 74848-0913 | Oil & Gas Operator | Nov 2000 |
| 25367 | Riviera Drilling & Exploration Company | | Oil & Gas Operator | Sep 2013 |
| 25368 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 25369 | Rixleben Jeffrey | West Chicago, IL 60186-0978 | Oil Operator | Feb 2016 |
| 25370 | Rixleben Thomas B Estate | Ada, OK 74820 | Oil & Gas Operator | Mar 2014 |
| 25371 | RJ Energy, LLC | Garnett, KS 66032 | Oil Operator | Dec 2024 |
| 25372 | RJ Schreiner SR | Freedom, PA 15042-9353 | Oil & Gas Operator | Dec 2015 |
| 25373 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 25374 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2025 |
| 25375 | RJD Management Co., Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2025 |
| 25376 | RJKB Foster Operating LLC | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 25377 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Dec 2024 |
| 25378 | RJM Oil Company, LLC | Irving, TX 75060 | Oil Operator | Apr 2025 |
| 25379 | RJW Oil And Gas, LLC | Cross Lane, WV 25313 | Oil & Gas Operator | Dec 2023 |
| 25380 | RK Petroleum Corp,Enex Res,Peninsular Oil Corp. | | Oil Operator | Dec 2024 |
| 25381 | Rki Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2021 |
| 25382 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 25383 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2025 |
| 25384 | RKR Exploration Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 25385 | RKW Operating LLC | Weatherford, TX 76085 | Gas Operator | Apr 2025 |
| 25386 | RL Investment, LLC | Hill City, KS 67642 | Oil Operator | Dec 2024 |
| 25387 | RL&B Energy LLC | Wichita Falls, TX 76230 | Oil & Gas Operator | Jan 2025 |
| 25388 | RLB Enterprises, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Feb 1997 |
| 25389 | RLB Investments LLC | Holdenville, OK 74848-9421 | Oil Operator | Jul 2017 |
| 25390 | RLM Energy Company Inc. | Monroe, LA 71201 | Oil & Gas Operator | Mar 2008 |
| 25391 | RLP Gulf States, L.L.C. | | Oil & Gas Operator | Apr 2012 |
| 25392 | RLS Oil Company | Tulia, TX 79088 | Oil & Gas Operator | Apr 2025 |
| 25393 | RLS Partnership | | Oil Operator | Apr 1983 |
| 25394 | RLT Investment | Morland, KS 67650 | Oil Operator | Mar 2009 |
| 25395 | Rlu Oil & Gas, Inc. | Devine, TX 78016 | Oil & Gas Operator | Apr 2025 |
| 25396 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | Apr 2025 |
| 25397 | RM Energy LTD Liab. Co. | Casper, WY 82602 | Gas Operator | Mar 2009 |
| 25398 | RM Oil & Gas Co | Pawhuska, OK 74056 | Oil Operator | Jul 1999 |
| 25399 | RMB Corporation | Senecaville, OH 43780 | Oil & Gas Operator | Dec 2016 |
| 25400 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | Apr 2025 |