| 801 | Premier Natural Resources, L.P. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2007 |
| 802 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2026 |
| 803 | Pri Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Sep 2026 |
| 804 | Prickett Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 805 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Sep 2026 |
| 806 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 807 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 808 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 809 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 810 | Production Management Associates | Plano, TX 75075 | Oil & Gas Operator | Sep 2026 |
| 811 | Production Marketing Assoc Inc | Plano, TX 75075 | Oil & Gas Operator | Sep 2026 |
| 812 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Sep 2026 |
| 813 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Sep 2026 |
| 814 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2026 |
| 815 | Prospctv Invstmnt & TRDG Co, LTD | Tulsa, OK 74170 | Oil & Gas Operator | May 2001 |
| 816 | PT Petroleum, LLC | Argyle, TX 76226 | Oil & Gas Operator | Oct 2019 |
| 817 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 818 | Pyote Disposal Company | Pyote, TX 79777 | Oil Operator | Sep 2026 |
| 819 | Pyramid Gas Co | Midland, TX 79701 | Oil Operator | Sep 2026 |
| 820 | Q Natural Resources, LLC | Jones, OK 73049 | Oil & Gas Operator | Sep 2026 |
| 821 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | May 2026 |
| 822 | Quatro Oil And Gas, Inc. | Joshua, TX 76058 | Oil & Gas Operator | Sep 2026 |
| 823 | Quay Valley, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2007 |
| 824 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 825 | Quintana Pet. Corp. | Refugio, TX 78377 | Oil & Gas Operator | Dec 2000 |
| 826 | R & S Investments | Tulsa, OK 74146-4743 | Oil Operator | Aug 2013 |
| 827 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 828 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Sep 2026 |
| 829 | R. W. S. Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Sep 2026 |
| 830 | R.K.G. Operations, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2004 |
| 831 | Rabalais, F.W. Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2023 |
| 832 | Raider Oil & Gas Company | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2026 |
| 833 | Railroad Commission Of Texas | Austin, TX 78701 | Oil Operator | Dec 2004 |
| 834 | Rainbow Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Nov 2002 |
| 835 | Rangeland Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2002 |
| 836 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Sep 2026 |
| 837 | Rayden | Southlake, TX 76092 | Oil & Gas Operator | Sep 2026 |
| 838 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 839 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 840 | Recovery Operating LP | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2026 |
| 841 | Red Stag Energy, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jan 2022 |
| 842 | Red Tail Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 843 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 844 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 845 | Reeves County Systems, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Aug 2019 |
| 846 | Regency Petroleum Co. Of New Mex | Coppell, TX 75019 | Oil & Gas Operator | Apr 2008 |
| 847 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Sep 2026 |
| 848 | Reliance Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Sep 2026 |
| 849 | Reliance Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 850 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2024 |
| 851 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Sep 2026 |
| 852 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 853 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Sep 2026 |
| 854 | Resaca Operating Company | Houston, TX 77010 | Oil & Gas Operator | Sep 2013 |
| 855 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Sep 2026 |
| 856 | Revier Resources Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2005 |
| 857 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 858 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 859 | Riata Energy, Inc. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2006 |
| 860 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 861 | Riley Production, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2012 |
| 862 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Sep 2026 |
| 863 | Rimrock Production Inc. | Giddings, TX 78942 | Oil & Gas Operator | Sep 2026 |
| 864 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 865 | Rio-Tex, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Sep 2026 |
| 866 | Rippy Branch Oil Co. | Grandfalls, TX 79742 | Oil & Gas Operator | Apr 2022 |
| 867 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | Sep 2026 |
| 868 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 869 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2026 |
| 870 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Sep 2026 |
| 871 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Sep 2026 |
| 872 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 873 | Roca Production, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 874 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 875 | Roden Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2008 |
| 876 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2026 |
| 877 | Romine Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 878 | Rosehill Operating Company, LLC | Houston, TX 77084 | Oil & Gas Operator | Sep 2021 |
| 879 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 880 | Royal Texas Petroleum | Lago VIsta, TX 78645 | Oil & Gas Operator | Sep 2026 |
| 881 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 882 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 883 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Sep 2026 |
| 884 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 885 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 886 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 887 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Sep 2026 |
| 888 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 889 | Saber Oil & Gas Ventures, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 890 | Sabinal Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 891 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 892 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 893 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Sep 2026 |
| 894 | Saguaro Petroleum, LLC | Eastland, TX 76448 | Oil & Gas Operator | Sep 2026 |
| 895 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Sep 2026 |
| 896 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 897 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 898 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Jul 2026 |
| 899 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 900 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |