| 801 | Republic Energy Resources,Inc. | | Oil Operator | May 1991 |
| 802 | Republic Exploration, LLC | Bowling Green, KY 42104 | Oil Operator | Dec 2011 |
| 803 | Republic Gas Gathering Sys Inc | | Oil & Gas Operator | Nov 1981 |
| 804 | Republic Mineral Corporation | | Oil & Gas Operator | Sep 1987 |
| 805 | Republic Petroleum Corp. | | Oil & Gas Operator | Nov 1977 |
| 806 | Republic Prod.Co.Of Tex., Inc | | Oil & Gas Operator | Jun 1981 |
| 807 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 808 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 809 | Res-Tech Inc. | | Oil & Gas Operator | Nov 2023 |
| 810 | Resaca Operating Company | Houston, TX 77010 | Oil & Gas Operator | Sep 2013 |
| 811 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 812 | Research Enterprises, Inc. | | Oil Operator | Feb 1996 |
| 813 | Research Exploration, LLC | Kingwood, TX 77339 | Oil & Gas Operator | Feb 2018 |
| 814 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 815 | Reserve Acquisition Group | Tulsa, OK 74153 | Oil & Gas Operator | Dec 1993 |
| 816 | Reserve Energy Exploration Company | Chagrin Falls, OH 44023 | Gas Operator | Dec 2022 |
| 817 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 818 | Reserve Gas Company, Inc. | Alden, NY 14004 | Gas Operator | Dec 2022 |
| 819 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 820 | Reserve Oil & Gas | | Oil & Gas Operator | Feb 1980 |
| 821 | Reserve Oil & Gas Company | | Oil & Gas Operator | Jul 1981 |
| 822 | Reserve Oil & Gas, Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 823 | Reserve Oil Inc. | | Oil & Gas Operator | Jan 1980 |
| 824 | Reserve Operating Corp. | Houston, TX 77040 | Oil & Gas Operator | Apr 2024 |
| 825 | Reserve Partners L.L.C. | | Oil & Gas Operator | Feb 2001 |
| 826 | Reserve Petroleum California Inc. | | Oil & Gas Operator | Nov 2023 |
| 827 | Reserve Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2008 |
| 828 | Reservoir Research Corp | | Oil Operator | Dec 2009 |
| 829 | Resetarits, David W. | Elma, NY 14059 | Gas Operator | Dec 2022 |
| 830 | Resolute Natural Res. Co., LLC | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 831 | Resolute Natural Resources Co., LLC | Denver, CO 80203 | Oil & Gas Operator | Feb 2017 |
| 832 | Resolute Wyoming Inc | Denver, CO 80203 | Oil & Gas Operator | May 2018 |
| 833 | Resolve Energy Corp | | Gas Operator | May 2009 |
| 834 | Resonance Exploration (North Dakota) LLC | | Oil & Gas Operator | Feb 2024 |
| 835 | Resource Acquisitions Corp. | | Oil & Gas Operator | Dec 2002 |
| 836 | Resource America Inc | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2011 |
| 837 | Resource Dev Technology LLC | Morrison, CO 80465-5020 | Oil & Gas Operator | Jan 2017 |
| 838 | Resource Development Technology LLC | Morrison, CO 80465 | Oil & Gas Operator | Oct 2020 |
| 839 | Resource Energy Can-Am LLC | | Oil & Gas Operator | May 2022 |
| 840 | Resource Engineering | | Gas Operator | Nov 2023 |
| 841 | Resource Expl & Prod, Inc. | Salado, TX 76571 | Oil & Gas Operator | Apr 2024 |
| 842 | Resource Management Company | Fredericksbrg, TX 78624 | Oil & Gas Operator | Feb 2015 |
| 843 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2024 |
| 844 | Resource Operating Company | Abilene, TX 79601 | Oil & Gas Operator | Jul 1997 |
| 845 | Resource Operations, Inc. | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 846 | Resource Rock Services, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2018 |
| 847 | Resource Securities Corp. | | Oil & Gas Operator | Mar 2005 |
| 848 | Resource Venture | | Oil & Gas Operator | Oct 1991 |
| 849 | Resources & Investment Co. | Mandeville, LA 70448 | Oil Operator | Oct 2023 |
| 850 | Resources America, Inc | | Oil Operator | Jan 1983 |
| 851 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 852 | Resources Operating Co Inc | Enid, OK 73703-1628 | Oil & Gas Operator | Dec 2023 |
| 853 | Ress Production Co. | Farmington, NM 87499 | Oil & Gas Operator | Apr 2024 |
| 854 | Ressler Well Service, Inc. | Burrton, KS 67020 | Oil & Gas Operator | Dec 2023 |
| 855 | Restoration Energy LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 856 | Ret Oil Inc | Del City, OK 73115 | Oil & Gas Operator | Jan 2007 |
| 857 | Retama Oil Corporation | Uvalde, TX 78801 | Oil & Gas Operator | Apr 2024 |
| 858 | Retamco Operating Inc | Red Lodge, MT 59068-0790 | Oil & Gas Operator | Jan 2024 |
| 859 | Retsal Drilling Co. | | Oil & Gas Operator | Jan 1984 |
| 860 | Retsal Production Company | | Oil & Gas Operator | Mar 1986 |
| 861 | Return Oil Corp | Oil City, PA 16301-0564 | Oil Operator | Dec 1992 |
| 862 | Reubin Collins Dba RCJ Enterprises | Hobbs, NM 882416055 | Oil & Gas Operator | May 2009 |
| 863 | Reunion Energy Company | Houston, TX 77056 | Oil & Gas Operator | May 1996 |
| 864 | Reunion Resources, Inc. | | Oil & Gas Operator | Dec 2015 |
| 865 | Reunion Titan, Inc. | | Oil & Gas Operator | Jan 2017 |
| 866 | Reusch Well Service, Inc. | Ottawa, KS 66067 | Oil Operator | Dec 2023 |
| 867 | Revard Oil & Gas Properties Inc | | Oil & Gas Operator | Jan 2024 |
| 868 | Revard Petroleum, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 869 | Reveille Resources | Houston, TX 77084 | Oil & Gas Operator | Apr 2011 |
| 870 | Reveille Resources (Texas), Inc. | Houston, TX 77084 | Oil & Gas Operator | Jan 2013 |
| 871 | Revel Oil & Gas, Inc. | | Oil & Gas Operator | Feb 2001 |
| 872 | Revelation Gas & Oil Oklahoma LLC | | Oil & Gas Operator | Jul 2023 |
| 873 | Revelation Oil & Gas LLC | Dumas, TX 79029 | Oil & Gas Operator | Apr 2024 |
| 874 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Dec 2023 |
| 875 | Revere Corporation | Fort Smith, AR 72902-0908 | Oil & Gas Operator | Feb 2015 |
| 876 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 877 | Revier Resources Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2005 |
| 878 | Revier, J. B. Prod. Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 1996 |
| 879 | Review Oil & Gas Inc | Edmond, OK 73034-7648 | Oil & Gas Operator | Dec 2023 |
| 880 | Revilo Exploration LLC | | Oil & Gas Operator | Apr 2020 |
| 881 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 882 | Revocable Inter VIvos Trust Of Delapp Frankie L | Bartlesville, OK 74006-0307 | Oil & Gas Operator | Feb 2020 |
| 883 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 884 | Revolution Resources LLC | | Oil & Gas Operator | Jun 2023 |
| 885 | Rex Drummond | Conneaut, OH 44030-9678 | Oil & Gas Operator | Dec 2019 |
| 886 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 887 | Rex Energy Rockies LLC | State College, PA 16801 | Oil & Gas Operator | May 2013 |
| 888 | Rex Oil, A Texas Partnership | Hondo, TX 78861 | Oil & Gas Operator | May 2003 |
| 889 | Rexcom, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 890 | Rexoco Incorpora | | Oil Operator | Apr 1992 |
| 891 | Rey Oil & Gas, Inc | Oneida, TN 37841 | Oil Operator | Dec 2022 |
| 892 | Reynolds Drill Coinc/Rosbottom | | Oil & Gas Operator | Jan 1990 |
| 893 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2024 |
| 894 | Reynolds E & P, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2024 |
| 895 | Reynolds Exploration Co. | | Oil Operator | Dec 1986 |
| 896 | Reynolds J W & Associates | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2000 |
| 897 | Reynolds Metals Company | | Gas Operator | Nov 2003 |
| 898 | Reynolds Mining Corp | | Oil & Gas Operator | Aug 1968 |
| 899 | Reynolds Oil Co. | | Oil Operator | Nov 2005 |
| 900 | Reynolds Res, Inc | Owensboro, KY 42303 | Oil & Gas Operator | Dec 2022 |