| 901 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2025 |
| 902 | Stelzer Drilling Co. Inc. | Post, TX 79356 | Oil Operator | Dec 2025 |
| 903 | Stelzer, E.A. Oil Company | Post, TX 79356 | Oil & Gas Operator | Feb 2002 |
| 904 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 905 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 906 | Stephens Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2022 |
| 907 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Sep 2025 |
| 908 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2025 |
| 909 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 910 | Stephens, Clayton E. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2011 |
| 911 | Stephens, Glynn | Overton, TX 75684 | Oil & Gas Operator | Oct 2001 |
| 912 | Stephens, Hayseed Oil Inc. | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2008 |
| 913 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 914 | Stephens, Morris | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 915 | Stephenson Oil & Gas, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Sep 1999 |
| 916 | Stephenson, Light | Whitsett, TX 78075 | Oil & Gas Operator | Nov 2000 |
| 917 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 918 | Sterling Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 919 | Sterling Engine Service, Inc. | Alice, TX 78333 | Oil & Gas Operator | Dec 2025 |
| 920 | Sterling Expl. & Prod. Co., LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 921 | Sterling Inv. Group & Assc., Inc | Baytown, TX 77522 | Oil & Gas Operator | Dec 2025 |
| 922 | Sterling Oil And Gas | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 923 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | Dec 2025 |
| 924 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Dec 2025 |
| 925 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 926 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 927 | Stevenson, Ken & Associates, Inc | La Grange, TX 78945 | Oil & Gas Operator | Sep 2002 |
| 928 | Steward Energy II, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 929 | Steward Energy, LLC | Frisco, TX 75034 | Oil & Gas Operator | Nov 2014 |
| 930 | Stewardship Resources | Roanoke, TX 76262 | Oil & Gas Operator | Jun 2022 |
| 931 | Stewart & Porter | Mingus, TX 76463 | Oil & Gas Operator | Apr 2002 |
| 932 | Stewart Construction | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 933 | Stewart Contract Services | Strawn, TX 76475 | Oil & Gas Operator | Dec 2025 |
| 934 | Stewart Family Holdings LLC | Weatherford, TX 76087 | Oil & Gas Operator | Dec 2025 |
| 935 | Stewart Oil & Gas | Stephenville, TX 76401 | Gas Operator | Dec 2025 |
| 936 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Jun 2025 |
| 937 | Stewart, James G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2019 |
| 938 | Stickney Oil & Gas, Inc. | Midland, TX 79704 | Oil & Gas Operator | Nov 2014 |
| 939 | Stickney, F. C., Inc. | Midland, TX 79704 | Oil & Gas Operator | Oct 1998 |
| 940 | Stillwater Petroleum Company | College Sta, TX 77845 | Oil & Gas Operator | Nov 1997 |
| 941 | Stine Massie Oil, LLC | Mansfield, TX 76063 | Oil Operator | Jul 2025 |
| 942 | Stine Oil Company | Mansfield, TX 76063 | Oil Operator | Mar 2016 |
| 943 | Stine, Ward L.Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1999 |
| 944 | Stine-Hawkins | Mansfield, TX 76063 | Gas Operator | Dec 2025 |
| 945 | Sting Exploration Company | Tulsa, OK 74120 | Oil Operator | Sep 2004 |
| 946 | Stinger Oil & Gas Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Oct 2013 |
| 947 | Stingray Oil Company, Inc. | Mullin, TX 76864 | Oil Operator | Dec 2025 |
| 948 | Stivers Inc | Graham, TX 76450 | Oil & Gas Operator | May 2003 |
| 949 | Stivers Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 1995 |
| 950 | Sto Operating Company | San Antonio, TX 78258 | Oil & Gas Operator | Dec 2025 |
| 951 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 952 | Stoltz, Deane H. | Midland, TX 79710 | Oil & Gas Operator | Oct 2000 |
| 953 | Stone & Webster Oil Company, Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1995 |
| 954 | Stone & Williams Oil&Gas Co.,Inc | Holliday, TX 76366 | Oil Operator | Apr 2013 |
| 955 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 956 | Stone Edge Energy, LLC | Georgetown, TX 78633 | Oil & Gas Operator | Dec 2025 |
| 957 | Stone Mountain Petroleum, LLC | Houston, TX 77008 | Oil & Gas Operator | Aug 2002 |
| 958 | Stone, B. W. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2012 |
| 959 | Stone, Gregory W. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 960 | Stone, J. G. Oil Co. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2018 |
| 961 | Stone, M. L. | Kerrville, TX 78029 | Oil & Gas Operator | Aug 2003 |
| 962 | Stonebriar Oil LLC | Frisco, TX 75034 | Oil & Gas Operator | Dec 2025 |
| 963 | Stonebriar Operating, LLC | Plano, TX 75093 | Oil Operator | Dec 2025 |
| 964 | Stoneburner Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1997 |
| 965 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Dec 2025 |
| 966 | Stonegate Production Company,LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 967 | Stoneham Oil Company | Houston, TX 77002 | Oil & Gas Operator | Sep 1995 |
| 968 | Stonehill Martin, LLC | Midland, TX 79705 | Oil Operator | Dec 2025 |
| 969 | Stoner Oil | Corsicana, TX 75109 | Oil Operator | Dec 2025 |
| 970 | Stoner, C. M. | Cleburne, TX 76031 | Oil & Gas Operator | Oct 1996 |
| 971 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 972 | Stonetown Properties, LTD. | Amarillo, TX 79114 | Oil & Gas Operator | Dec 2016 |
| 973 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 974 | Storm Oil | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 975 | Storm Peak Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2012 |
| 976 | Story NRG LLC | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 977 | Stout Consulting Services, Inc. | Alice, TX 78333 | Oil & Gas Operator | May 1999 |
| 978 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 979 | Stout Energy Partners LLC | Sulphur SPGS, TX 75482 | Oil Operator | Dec 2025 |
| 980 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 981 | Stovall, Howard | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 982 | Stovall, Troy | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 983 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 984 | STP Production, LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Dec 2025 |
| 985 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 986 | Strand Energy, Inc. (I) | Houston, TX 77002 | Oil & Gas Operator | Sep 1996 |
| 987 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 988 | Strand, Carlton Oil | Stamford, TX 79553 | Oil & Gas Operator | May 1997 |
| 989 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 990 | Strange, Joyce Marital Trust | Holliday, TX 76366 | Oil Operator | May 2008 |
| 991 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 992 | Strata Operating, Inc. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Dec 2025 |
| 993 | Strata Petroleum Co. | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 994 | Strata Star Petroleum Corp. | Uvalde, TX 78801 | Oil Operator | Dec 2025 |
| 995 | Stratagas, Inc. | Rowlett, TX 75088 | Oil & Gas Operator | May 2006 |
| 996 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 997 | Stratco, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 998 | Strategy Operating, LLC | Midland, TX 79710 | Gas Operator | Dec 2025 |
| 999 | Stratex Oil & Gas Holdings, Inc. | Watertown, CT 06795 | Oil Operator | Jun 2015 |
| 1000 | Stratlynn, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |