| 801 | St. Clair Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Mar 2008 |
| 802 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 803 | St. Mary Energy Company | Houston, TX 77079 | Oil & Gas Operator | Aug 2008 |
| 804 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 805 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 806 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 807 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2024 |
| 808 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Nov 2024 |
| 809 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Nov 2024 |
| 810 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 811 | Staggered T Oil LLC | Quanah, TX 79252 | Oil Operator | Nov 2024 |
| 812 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 813 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Sep 2024 |
| 814 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 815 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 816 | Stal Oil Production, L.L.C. | Argyle, TX 76226 | Oil Operator | Nov 2024 |
| 817 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 818 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 819 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 820 | Stalking Horse Energy, Limited Liability Company | Houston, TX 77084 | Oil & Gas Operator | Nov 2024 |
| 821 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 822 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 823 | Stallion Oil Company | Lafayette, LA 70505 | Oil & Gas Operator | Jun 2004 |
| 824 | Stallion Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 825 | Stampede Energy Corp. | Canada, 00100 | Oil & Gas Operator | Mar 2000 |
| 826 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2024 |
| 827 | Standard Oil Company, Inc. | Parkesburg, WV 26103 | Oil & Gas Operator | Mar 2022 |
| 828 | Standard Resources Corp. | Houston, TX 77063 | Oil & Gas Operator | Nov 2024 |
| 829 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 830 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 831 | Stanolind Permian LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2024 |
| 832 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 833 | Stanotex, LLC | Katy, TX 77494 | Oil & Gas Operator | Nov 2024 |
| 834 | Stanton Mineral Development Inc | Austin, TX 78759 | Oil & Gas Operator | Nov 2024 |
| 835 | Staples, James W. | Tuleta, TX 78162 | Oil & Gas Operator | Sep 2014 |
| 836 | Staples, James W. Prod. Co. | Tuleta, TX 78162 | Oil & Gas Operator | Nov 2024 |
| 837 | Staples, Tommy Oil Co. | Pettus, TX 78146 | Oil & Gas Operator | Mar 2008 |
| 838 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Nov 2024 |
| 839 | Star Oil & Gas | Ben Bolt, TX 78342 | Oil & Gas Operator | Nov 2024 |
| 840 | Star One Energy, Inc. | Fort Worth, TX 76163 | Oil & Gas Operator | May 2012 |
| 841 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Nov 2024 |
| 842 | Star Royalty Company | Oklahoma City, OK 73177 | Gas Operator | Sep 1998 |
| 843 | Star-Jet Co. | Gainesville, TX 76240 | Oil Operator | Nov 2024 |
| 844 | Starco Exploration, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Nov 2024 |
| 845 | Stardust Leasing, Inc. | Richmond, TX 77469 | Oil & Gas Operator | Jul 1999 |
| 846 | Stark Petroleum | Tuleta, TX 78162 | Oil & Gas Operator | Nov 2024 |
| 847 | Starkey Oilfield Service, Inc. | Sweet Home, TX 77987 | Oil & Gas Operator | Aug 2004 |
| 848 | Starlight Ridge | Whitesboro, TX 76273 | Oil & Gas Operator | Nov 2024 |
| 849 | Starr Operating Company | Austin, TX 78759 | Oil & Gas Operator | Nov 2024 |
| 850 | Starr Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Nov 2024 |
| 851 | Starrak Operating Company, Inc. | Midland, TX 79706 | Oil & Gas Operator | Jun 1999 |
| 852 | Startap, Inc. | Conroe, TX 77305 | Oil Operator | Nov 2024 |
| 853 | Startex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2024 |
| 854 | Stasney Well Service, LLC | Albany, TX 76430 | Oil & Gas Operator | Nov 2024 |
| 855 | Stasney, H. R. & Sons, LTD. | Albany, TX 76430 | Oil & Gas Operator | Nov 2024 |
| 856 | Statex Operating, LLC | Dallas, TX 75229 | Oil & Gas Operator | Mar 2007 |
| 857 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 858 | Statia Enterprises, Inc | Irving, TX 75014 | Oil & Gas Operator | Nov 2024 |
| 859 | Statoil Oil & Gas LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2018 |
| 860 | Statoil Texas Onshore Prop LLC | Austin, TX 78730 | Oil & Gas Operator | Dec 2018 |
| 861 | Staub, Larry | Richardson, TX 75080 | Oil & Gas Operator | Aug 2003 |
| 862 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Nov 2024 |
| 863 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 864 | Steadfast Oil & Gas, LLC | Midland, TX 79707 | Oil & Gas Operator | Oct 2022 |
| 865 | Stealth Onsite Solutions LLC | Pasadena, TX 77505 | Oil Operator | Nov 2024 |
| 866 | Stealth, Inc. | Cross Plains, TX 76443 | Gas Operator | Mar 1997 |
| 867 | Stearns Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 1993 |
| 868 | Steele, Mark E. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 869 | Steinberger, D. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1995 |
| 870 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 871 | Steindorf, Bert Oil & Gas Co. | Floresville, TX 78114 | Oil & Gas Operator | Nov 2024 |
| 872 | Steinman, Frank C. | Electra, TX 76360 | Oil & Gas Operator | Nov 2024 |
| 873 | Stelbar Oil Corp | Wichita, KS 67206 | Oil & Gas Operator | Aug 1995 |
| 874 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 875 | Steller Energy & Investment Corp | Plano, TX 75093 | Oil & Gas Operator | Feb 2021 |
| 876 | Stellex | De Leon, TX 76444 | Oil & Gas Operator | Nov 2024 |
| 877 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Nov 2024 |
| 878 | Stelzer Drilling Co. Inc. | Post, TX 79356 | Oil Operator | Nov 2024 |
| 879 | Stelzer, E.A. Oil Company | Post, TX 79356 | Oil & Gas Operator | Feb 2002 |
| 880 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 881 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 882 | Stephens Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2022 |
| 883 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Sep 2024 |
| 884 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 885 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 886 | Stephens, Clayton E. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2011 |
| 887 | Stephens, Glynn | Overton, TX 75684 | Oil & Gas Operator | Oct 2001 |
| 888 | Stephens, Hayseed Oil Inc. | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2008 |
| 889 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 890 | Stephens, Morris | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 891 | Stephenson Oil & Gas, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Sep 1999 |
| 892 | Stephenson, Light | Whitsett, TX 78075 | Oil & Gas Operator | Nov 2000 |
| 893 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 894 | Sterling Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 895 | Sterling Engine Service, Inc. | Alice, TX 78333 | Oil & Gas Operator | Nov 2024 |
| 896 | Sterling Expl. & Prod. Co., LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 897 | Sterling Inv. Group & Assc., Inc | Baytown, TX 77522 | Oil & Gas Operator | Nov 2024 |
| 898 | Sterling Oil And Gas | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2024 |
| 899 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | Nov 2024 |
| 900 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Nov 2024 |