| 1001 | Rhombus Operating Co., LTD | Littleton, CO 80160 | Oil & Gas Operator | Dec 2025 |
| 1002 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 1003 | RHR Oil & Gas, LLC | Fort Worth, TX 76107 | Oil Operator | Feb 2026 |
| 1004 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 1005 | Ria Mia Corporation | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2011 |
| 1006 | Rialto Oil & Gas Corporation | Houston, TX 77098 | Oil & Gas Operator | Oct 2012 |
| 1007 | Riata Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2006 |
| 1008 | Ric Petroleum | | Gas Operator | Dec 1998 |
| 1009 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 1010 | Rice Drilling B LLC | Canonsburg, PA 15317-1000 | Gas Operator | Dec 2025 |
| 1011 | Rice Drilling Company | Santa Anna, TX 76878 | Oil & Gas Operator | Feb 2026 |
| 1012 | Rice Drilling D LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Sep 2025 |
| 1013 | Rice Engineering | | Oil & Gas Operator | Jul 1988 |
| 1014 | Rice Engineering Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 1015 | Rice Michael Lee | Beggs, OK 74421-2977 | Oil Operator | Jul 2025 |
| 1016 | Rice Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2020 |
| 1017 | Rice Patricia Dba Rice Oil | Duncan, OK 73533-1888 | Oil Operator | Jan 2021 |
| 1018 | Rice Production Company | | Oil Operator | Dec 2019 |
| 1019 | Rice, James D. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2007 |
| 1020 | Riceland Petroleum Company | | Oil & Gas Operator | Nov 2024 |
| 1021 | Rich, Joe | | Oil Operator | Dec 2019 |
| 1022 | Richard A. Williams Expl Corp. | | Oil & Gas Operator | Dec 1983 |
| 1023 | Richard B Herzog | Bradford, PA 16701-3619 | Oil Operator | Dec 2007 |
| 1024 | Richard B. Nelson,Etal | | Oil & Gas Operator | May 1979 |
| 1025 | Richard C Sullins Credit Shelter Trust | Perry, OK 73077 | Gas Operator | Feb 2025 |
| 1026 | Richard C. Bellows Family Trust | George West, TX 78022 | Oil Operator | Feb 2026 |
| 1027 | Richard C. Hinds | | Oil Operator | Jan 2025 |
| 1028 | Richard Charles J | | Oil & Gas Operator | May 1996 |
| 1029 | Richard Engineer | | Oil Operator | Mar 1991 |
| 1030 | Richard G Boarts | Ford City, PA 16226-7001 | Gas Operator | Dec 2012 |
| 1031 | Richard H Burkland | Lemont Furnace, PA 15456-0073 | Oil & Gas Operator | Dec 2012 |
| 1032 | Richard H. Lee, L.L.C. | | Oil & Gas Operator | Sep 1999 |
| 1033 | Richard Nelson | | Oil Operator | Feb 1987 |
| 1034 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 1035 | Richard P. Kelter | | Oil & Gas Operator | Dec 1996 |
| 1036 | Richard Steltzner | | Gas Operator | Dec 1992 |
| 1037 | Richard T. Perry | | Gas Operator | May 1993 |
| 1038 | Richard W Thompson Inc | Plano, TX 75075 | Oil & Gas Operator | Jul 2019 |
| 1039 | Richard Young & Associates | | Oil & Gas Operator | Dec 2004 |
| 1040 | Richard'S Texas Tea | Rockdale, TX 76567 | Oil Operator | Feb 2026 |
| 1041 | Richards Drilling Co | Venango, PA 16440-1123 | Oil & Gas Operator | Dec 2015 |
| 1042 | Richards, C W & J E | Vienna, WV 26105-1919 | Gas Operator | Dec 2008 |
| 1043 | Richards, Michael Dewain | Graham, TX 76450 | Oil & Gas Operator | Apr 2011 |
| 1044 | Richards, Tot Dozer, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | May 2013 |
| 1045 | Richards, Tot Oil Co. | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 1046 | Richardson And Son , Inc. | Winfield, KS 67156 | Oil Operator | Sep 2025 |
| 1047 | Richardson Construction Co | Henryetta, OK 74437 | Oil & Gas Operator | Apr 2015 |
| 1048 | Richardson County Crude Inc. | | Oil Operator | Dec 2024 |
| 1049 | Richardson Developments | | Oil Operator | Apr 2025 |
| 1050 | Richardson Energy Corporation | | Oil & Gas Operator | Dec 1987 |
| 1051 | Richardson J Mar | | Oil & Gas Operator | Apr 1995 |
| 1052 | Richardson Oil | | Oil & Gas Operator | Dec 2019 |
| 1053 | Richardson Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 1054 | Richardson Oil Operating | | Oil & Gas Operator | Dec 2009 |
| 1055 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Nov 2025 |
| 1056 | Richardson Resources Inc | Brownwood, TX 76804 | Oil & Gas Operator | Feb 2026 |
| 1057 | Richardson WM S | Duncan, OK 73533 | Oil Operator | Jun 2013 |
| 1058 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 1059 | Richardson, Marshall T. | Midfield, TX 77458 | Oil & Gas Operator | Feb 2026 |
| 1060 | Richart Oil Company Inc | Oklahoma City, OK 73154-0631 | Oil & Gas Operator | Aug 1995 |
| 1061 | Richey Heartsill | | Oil Operator | Feb 1991 |
| 1062 | Richey Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 1063 | Richey Properties, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 1064 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2026 |
| 1065 | Richlan Drilling | | Oil Operator | Dec 1994 |
| 1066 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Sep 2025 |
| 1067 | Richland Energy Corporation | Tulsa, OK 74103-4441 | Oil Operator | Jul 1995 |
| 1068 | Richland Energy, Inc. | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 1069 | Richland Oil Investments, LLC | Palco, KS 67657 | Oil Operator | Sep 2025 |
| 1070 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2026 |
| 1071 | Richland Resources, Inc. | | Oil & Gas Operator | Aug 1990 |
| 1072 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 1073 | Richmond Drilling Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 1074 | Richmond Operating Company | Midland, TX 79707 | Oil & Gas Operator | Feb 2007 |
| 1075 | Richmond Petroleum Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Aug 2003 |
| 1076 | Richter Ervin E | | Oil & Gas Operator | Dec 2009 |
| 1077 | Richter Operating Company | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2007 |
| 1078 | Rick & Sons Oil LLC | Warren, PA 16365-3561 | Oil & Gas Operator | Dec 2025 |
| 1079 | Rick Parrish & Family Contractors Inc | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 1080 | Rick Pulliam Oil & Gas Inc | Bristow, OK 74010 | Oil & Gas Operator | Nov 2025 |
| 1081 | Rick'S Well Service | Cherryvale, KS 67335 | Oil & Gas Operator | Apr 2023 |
| 1082 | Rick-Rod Oil Company, Inc | Columbia, KY 42728 | Oil Operator | Dec 2022 |
| 1083 | Rick-Rod Well Services Co | | Oil Operator | Dec 2013 |
| 1084 | Rickaway Energy, Corp. | Pleasanton, TX 78064 | Oil & Gas Operator | Feb 2026 |
| 1085 | Rickelson Oil & Gas Company | Tulsa, OK 74105 | Oil & Gas Operator | Aug 1993 |
| 1086 | Rickerson, Russell | Rantoul, KS 66079 | Oil Operator | Aug 2025 |
| 1087 | Ricks & Ricks Oil Producers | | Oil Operator | Sep 1983 |
| 1088 | Ricks Consulting LLC | Copan, OK 74022 | Oil Operator | Sep 2025 |
| 1089 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 1090 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 1091 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 1092 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 1093 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 1094 | Ricochet Energy, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Feb 2026 |
| 1095 | Ricon Petroleum Company | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2008 |
| 1096 | Ricotta, Deborah | Lancaster, NY 14043 | Gas Operator | Dec 2024 |
| 1097 | Riddle Engineering Corp. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2011 |
| 1098 | Riddle William T | Haskell, OK 74436-1353 | Oil & Gas Operator | Feb 2014 |
| 1099 | Riddle, James O | Albany, KY 42602 | Oil Operator | Dec 2023 |
| 1100 | Riddle, William D | | Oil & Gas Operator | Dec 2021 |