| 4901 | Regional Energy Corporation | Temple, TX 76503-1733 | Oil Operator | Mar 1996 |
| 4902 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jun 2025 |
| 4903 | Reign Operating LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 4904 | Reliable Oil Industries Inc | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2024 |
| 4905 | Reliance Trusts | Dallas, TX 75244 | Oil & Gas Operator | Nov 1995 |
| 4906 | Relm Energy Inc | Morris, OK 74445-2227 | Oil & Gas Operator | Feb 2021 |
| 4907 | Remco Energy Corporation | Independence, MO 64055 | Oil & Gas Operator | Nov 2009 |
| 4908 | Remnant Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 4909 | Remo Production Co | Stillwater, OK 74074-9333 | Oil Operator | Apr 2014 |
| 4910 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 4911 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 4912 | Rence Guy A | | Oil Operator | Jan 2013 |
| 4913 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Feb 2025 |
| 4914 | Renegade Oil And Gas LLC | Helena, OK 73741-0162 | Oil & Gas Operator | Dec 2019 |
| 4915 | Renegade Operating Company | Aurora, CO 80016 | Oil & Gas Operator | Aug 2023 |
| 4916 | Renfroe Lyndol | Wilson, OK 73463-6631 | Oil Operator | May 2020 |
| 4917 | Reno Resources Inc | Boynton, OK 74422-9762 | Oil & Gas Operator | May 2015 |
| 4918 | Rensark Energy Company Inc | Oklahoma City, OK 73105-5208 | Oil & Gas Operator | Apr 2015 |
| 4919 | Renthol Oil LLC | Iowa Park, TX 76367-8101 | Oil & Gas Operator | Mar 2018 |
| 4920 | Reo Resources Inc | | Oil & Gas Operator | Apr 2018 |
| 4921 | Replay Energy Assets LLC | Oklahoma City, OK 73156 | Oil & Gas Operator | Jul 2025 |
| 4922 | Replay Resources LLC | Ada, OK 74820-6512 | Oil Operator | Nov 2022 |
| 4923 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 4924 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 4925 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 4926 | Reserve Acquisition Group | Tulsa, OK 74153 | Oil & Gas Operator | Dec 1993 |
| 4927 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 4928 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 4929 | Resolute Wyoming Inc | Denver, CO 80203 | Oil & Gas Operator | May 2018 |
| 4930 | Resource Dev Technology LLC | Morrison, CO 80465-5020 | Oil & Gas Operator | Jan 2017 |
| 4931 | Resource Development, Inc. | Stroud, OK 74079 | Oil & Gas Operator | Feb 2007 |
| 4932 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 4933 | Resource Operations, Inc. | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 4934 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 2018 |
| 4935 | Resources Operating Co Inc | Rogers, AR 72756 | Oil & Gas Operator | May 2025 |
| 4936 | Ret Oil Inc | Del City, OK 73115 | Oil & Gas Operator | Jan 2007 |
| 4937 | Revard Oil And Gas Properties Inc | | Oil & Gas Operator | Jun 2025 |
| 4938 | Revelation Gas & Oil Oklahoma LLC | Kansas City, KS 66103 | Oil & Gas Operator | Jul 2023 |
| 4939 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jun 2025 |
| 4940 | Revere Corporation | Fort Smith, AR 72902-0908 | Oil & Gas Operator | Feb 2015 |
| 4941 | Review Oil & Gas Inc | Edmond, OK 73034-7648 | Oil & Gas Operator | Jun 2025 |
| 4942 | Revilo Exploration LLC | Edmond, OK 73034 | Oil & Gas Operator | Apr 2020 |
| 4943 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 4944 | Revocable Inter VIvos Trust Of Delapp Frankie L | Bartlesville, OK 74006-0307 | Oil & Gas Operator | Feb 2020 |
| 4945 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2024 |
| 4946 | Revolution Resources LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2023 |
| 4947 | Reynolds J W & Associates | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2000 |
| 4948 | RF Operating And Supply Inc | | Oil & Gas Operator | Feb 2013 |
| 4949 | Rhino Operating Company LLC | Brentwood, TN 37027-8760 | Oil & Gas Operator | Jun 2025 |
| 4950 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 4951 | Rhoads Brothers Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 1996 |
| 4952 | Rhoads Mark Operations | Ponca City, OK 74604 | Oil & Gas Operator | May 2006 |
| 4953 | Rhodes-Fielding Corporation | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 4954 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 4955 | Rice Michael Lee | Beggs, OK 74421-2977 | Oil Operator | Jul 2025 |
| 4956 | Rice Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2020 |
| 4957 | Rice Patricia Dba Rice Oil | Duncan, OK 73533-1888 | Oil Operator | Jan 2021 |
| 4958 | Richard C Sullins Credit Shelter Trust | Perry, OK 73077 | Gas Operator | Feb 2025 |
| 4959 | Richard Charles J | | Oil & Gas Operator | May 1996 |
| 4960 | Richard W Thompson Inc | Plano, TX 75075 | Oil & Gas Operator | Jul 2019 |
| 4961 | Richardson Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2003 |
| 4962 | Richardson WM S | Duncan, OK 73533 | Oil Operator | Jun 2013 |
| 4963 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4964 | Richart Oil Company Inc | Oklahoma City, OK 73154-0631 | Oil & Gas Operator | Aug 1995 |
| 4965 | Richland Energy Corporation | Tulsa, OK 74103-4441 | Oil Operator | Jul 1995 |
| 4966 | Richland Resources Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 4967 | Rick Pulliam Oil & Gas Inc | Bristow, OK 74010 | Oil & Gas Operator | Jun 2025 |
| 4968 | Ricks Consulting LLC | Copan, OK 74022 | Oil Operator | Jun 2025 |
| 4969 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 4970 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 4971 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4972 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 4973 | Riddle William T | Haskell, OK 74436-1353 | Oil & Gas Operator | Feb 2014 |
| 4974 | Ridge Petroleum Inc. | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 4975 | Rietz John T & Co Inc | | Oil & Gas Operator | Mar 1992 |
| 4976 | Rif Raf Inc | Norman, OK 73069 | Oil Operator | May 1999 |
| 4977 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 4978 | Rig Petroleum, LLC | Spearman, TX 79081 | Oil & Gas Operator | Oct 2025 |
| 4979 | Riggins Energy Inc. | Vernon, TX 76385 | Oil & Gas Operator | Jul 2004 |
| 4980 | Riley Deborah R | Nowata, OK 74048 | Oil Operator | Jun 2025 |
| 4981 | Riley Exploration Operating Co LLC | Blanchard, OK 73010-8024 | Gas Operator | Jun 2017 |
| 4982 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 4983 | Rimrock Gas Company | Weatherford, OK 73096 | Oil & Gas Operator | May 2008 |
| 4984 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Jun 2025 |
| 4985 | Rio Blanco Operating LLC | Victoria, TX 77904 | Oil & Gas Operator | Jun 2025 |
| 4986 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 4987 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Oct 2025 |
| 4988 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | May 2025 |
| 4989 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 4990 | River City Resources Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 1997 |
| 4991 | River Rock Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 4992 | River Valley Oil LLC | Konawa, OK 74849 | Oil Operator | Jun 2025 |
| 4993 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Jun 2025 |
| 4994 | Riverstone Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 4995 | Rives Owen H | Holdenville, OK 74848-0913 | Oil & Gas Operator | Nov 2000 |
| 4996 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 4997 | Rixleben Jeffrey | West Chicago, IL 60186-0978 | Oil Operator | Feb 2016 |
| 4998 | Rixleben Thomas B Estate | Ada, OK 74820 | Oil & Gas Operator | Mar 2014 |
| 4999 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2025 |
| 5000 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2025 |