| 801 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 802 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2024 |
| 803 | R. W. S. Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Apr 2024 |
| 804 | R.K.G. Operations, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2004 |
| 805 | Rabalais, F.W. Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2023 |
| 806 | Raider Oil & Gas Company | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 807 | Railroad Commission Of Texas | Austin, TX 78701 | Oil Operator | Dec 2004 |
| 808 | Rainbow Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Nov 2002 |
| 809 | Rangeland Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2002 |
| 810 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Apr 2024 |
| 811 | Ray Oil Company | Dallas, TX 75382 | Oil Operator | Dec 1989 |
| 812 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 813 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 814 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 815 | Recovery Operating LP | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2024 |
| 816 | Red Stag Energy, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jun 2021 |
| 817 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 818 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 819 | Reeves County Systems, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Aug 2019 |
| 820 | Regency Petroleum Co. Of New Mex | Coppell, TX 75019 | Oil & Gas Operator | Apr 2008 |
| 821 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Apr 2024 |
| 822 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 823 | Reliance Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 824 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jan 2024 |
| 825 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 826 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 827 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |
| 828 | Resaca Operating Company | Houston, TX 77010 | Oil & Gas Operator | Sep 2013 |
| 829 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 830 | Revier Resources Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2005 |
| 831 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 832 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 833 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 834 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 835 | Riley Production, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2012 |
| 836 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
| 837 | Rimrock Production Inc. | Giddings, TX 78942 | Oil & Gas Operator | Apr 2024 |
| 838 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 839 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 840 | Rippy Branch Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Apr 2022 |
| 841 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 842 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 843 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2024 |
| 844 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2024 |
| 845 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 846 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 847 | Roca Production, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 848 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 849 | Roden Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2008 |
| 850 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 851 | Romine Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 852 | Rosehill Operating Company, LLC | Houston, TX 77084 | Oil & Gas Operator | Sep 2021 |
| 853 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Apr 2024 |
| 854 | Royal Texas Petroleum | Lago VIsta, TX 78645 | Oil & Gas Operator | Apr 2024 |
| 855 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 856 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 857 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2024 |
| 858 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 859 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 860 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 861 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Apr 2024 |
| 862 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 863 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 864 | Saber Oil & Gas Ventures, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 865 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 866 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 867 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 868 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Apr 2024 |
| 869 | Saguaro Petroleum, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 870 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 871 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 872 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 873 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2024 |
| 874 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 875 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 876 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 877 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 878 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 879 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 880 | Santo Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 881 | Sapient Energy Corp | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2002 |
| 882 | Savior Oil Company | Allen, TX 75013 | Oil Operator | Nov 2015 |
| 883 | Sayers Operating Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2005 |
| 884 | SBJ Oil & Gas | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2009 |
| 885 | SBJ Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | Apr 2024 |
| 886 | Scott, Steve Engineering | Midland, TX 79710 | Oil & Gas Operator | Apr 2005 |
| 887 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 888 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 889 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 890 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 891 | Sea Sand Oil Company | Fort Worth, TX 76185 | Oil & Gas Operator | Jun 1995 |
| 892 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 893 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 894 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 895 | Sentry Exploration, Inc. | Houston, TX 77006 | Oil & Gas Operator | Apr 2024 |
| 896 | SG Interests, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jun 2007 |
| 897 | SGP Operating LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2024 |
| 898 | Shallow Production Oper, LLC | Austin, TX 78738 | Oil Operator | Apr 2024 |
| 899 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2024 |
| 900 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2024 |