| 901 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 902 | Sterling Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 903 | Sterling Engine Service, Inc. | Alice, TX 78333 | Oil & Gas Operator | Jun 2026 |
| 904 | Sterling Expl. & Prod. Co., LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 905 | Sterling Inv. Group & Assc., Inc | Baytown, TX 77522 | Oil & Gas Operator | Jun 2026 |
| 906 | Sterling Oil And Gas | Weatherford, TX 76086 | Oil & Gas Operator | Jun 2026 |
| 907 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | Jun 2026 |
| 908 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Jun 2026 |
| 909 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 910 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 911 | Stevenson, Ken & Associates, Inc | La Grange, TX 78945 | Oil & Gas Operator | Sep 2002 |
| 912 | Steward Energy II, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 913 | Steward Energy, LLC | Frisco, TX 75034 | Oil & Gas Operator | Nov 2014 |
| 914 | Stewardship Resources | Roanoke, TX 76262 | Oil & Gas Operator | Jun 2022 |
| 915 | Stewart & Porter | Mingus, TX 76463 | Oil & Gas Operator | Apr 2002 |
| 916 | Stewart Construction | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 917 | Stewart Family Holdings LLC | Weatherford, TX 76087 | Oil & Gas Operator | Jun 2026 |
| 918 | Stewart Oil & Gas | Stephenville, TX 76401 | Gas Operator | Jun 2026 |
| 919 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Feb 2026 |
| 920 | Stewart, James G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2019 |
| 921 | Stickney Oil & Gas, Inc. | Midland, TX 79704 | Oil & Gas Operator | Nov 2014 |
| 922 | Stickney, F. C., Inc. | Midland, TX 79704 | Oil & Gas Operator | Oct 1998 |
| 923 | Stillwater Petroleum Company | College Sta, TX 77845 | Oil & Gas Operator | Nov 1997 |
| 924 | Stine Massie Oil, LLC | Mansfield, TX 76063 | Oil Operator | Jul 2025 |
| 925 | Stine Oil Company | Mansfield, TX 76063 | Oil Operator | Mar 2016 |
| 926 | Stine, Ward L.Oil Company | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1999 |
| 927 | Stine-Hawkins | Mansfield, TX 76063 | Gas Operator | Jun 2026 |
| 928 | Sting Exploration Company | Tulsa, OK 74120 | Oil Operator | Sep 2004 |
| 929 | Stinger Oil & Gas Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Oct 2013 |
| 930 | Stingray Oil Company, Inc. | Goldthwaite, TX 76844 | Oil Operator | Jun 2026 |
| 931 | Stivers Inc | Graham, TX 76450 | Oil & Gas Operator | May 2003 |
| 932 | Stivers Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 1995 |
| 933 | Sto Operating Company | San Antonio, TX 78258 | Oil & Gas Operator | Jun 2026 |
| 934 | Stober Oil And Gas Services, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 935 | Stoltz, Deane H. | Midland, TX 79710 | Oil & Gas Operator | Oct 2000 |
| 936 | Stone & Webster Oil Company, Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1995 |
| 937 | Stone & Williams Oil&Gas Co.,Inc | Holliday, TX 76366 | Oil Operator | Apr 2013 |
| 938 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2026 |
| 939 | Stone Edge Energy, LLC | El Campo, TX 77437 | Oil & Gas Operator | Jun 2026 |
| 940 | Stone Mountain Petroleum, LLC | Houston, TX 77008 | Oil & Gas Operator | Aug 2002 |
| 941 | Stone, B. W. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2012 |
| 942 | Stone, Gregory W. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2026 |
| 943 | Stone, J. G. Oil Co. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2018 |
| 944 | Stone, M. L. | Kerrville, TX 78029 | Oil & Gas Operator | Aug 2003 |
| 945 | Stonebriar Oil LLC | Dallas, TX 75252 | Oil & Gas Operator | Jun 2026 |
| 946 | Stonebriar Operating, LLC | Plano, TX 75093 | Oil Operator | Jun 2026 |
| 947 | Stoneburner Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1997 |
| 948 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Jun 2026 |
| 949 | Stonegate Production Company,LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2026 |
| 950 | Stoneham Oil Company | Houston, TX 77002 | Oil & Gas Operator | Sep 1995 |
| 951 | Stoner Oil | Corsicana, TX 75109 | Oil Operator | Jun 2026 |
| 952 | Stoner, C. M. | Cleburne, TX 76031 | Oil & Gas Operator | Oct 1996 |
| 953 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2026 |
| 954 | Stonetown Properties, LTD. | Amarillo, TX 79114 | Oil & Gas Operator | Dec 2016 |
| 955 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 956 | Storm Oil | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2026 |
| 957 | Storm Peak Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2012 |
| 958 | Story NRG LLC | Boerne, TX 78006 | Oil & Gas Operator | Jun 2026 |
| 959 | Stout Consulting Services, Inc. | Alice, TX 78333 | Oil & Gas Operator | May 1999 |
| 960 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Jun 2026 |
| 961 | Stout Energy Partners LLC | Sulphur SPGS, TX 75482 | Oil Operator | Jun 2026 |
| 962 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 963 | Stovall, Howard | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 964 | Stovall, Troy | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 965 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 966 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 967 | Strand Energy, Inc. (I) | Houston, TX 77002 | Oil & Gas Operator | Sep 1996 |
| 968 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 969 | Strand, Carlton Oil | Stamford, TX 79553 | Oil & Gas Operator | May 1997 |
| 970 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 971 | Strange, Joyce Marital Trust | Holliday, TX 76366 | Oil Operator | May 2008 |
| 972 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 973 | Strata Operating, Inc. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Jun 2026 |
| 974 | Strata Petroleum Co. | Midland, TX 79701 | Oil & Gas Operator | May 1997 |
| 975 | Strata Star Petroleum Corp. | Uvalde, TX 78801 | Oil Operator | Jun 2026 |
| 976 | Stratagas, Inc. | Rowlett, TX 75088 | Oil & Gas Operator | May 2006 |
| 977 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Jun 2026 |
| 978 | Stratco, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 979 | Strategy Operating, LLC | Midland, TX 79710 | Gas Operator | Jun 2026 |
| 980 | Stratex Oil & Gas Holdings, Inc. | Watertown, CT 06795 | Oil Operator | Jun 2015 |
| 981 | Stratlynn, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 982 | Strawn DRLG. Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2005 |
| 983 | Strawn Energy Services, LLC | Lubbock, TX 79424 | Oil Operator | Jun 2026 |
| 984 | Strawn Operating Co., L.L.C. | El Paso, TX 79912 | Oil Operator | Jun 2026 |
| 985 | Strawn Partners Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 986 | Strawn Petroleum Operating, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2026 |
| 987 | Stray Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 2008 |
| 988 | Stray Oil Company, LLC | Burkburnett, TX 76354 | Oil Operator | Nov 2017 |
| 989 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 990 | Strebor Oil Co. | Dallas, TX 75225 | Oil & Gas Operator | Jun 1993 |
| 991 | Street, Spencer B., Jr. | Graham, TX 76450 | Oil & Gas Operator | Mar 1998 |
| 992 | Strike Too Oil | Albany, TX 76430 | Oil Operator | Jun 2026 |
| 993 | Stringer Oil & Gas Co., Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 1996 |
| 994 | Striper Oil, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Apr 2002 |
| 995 | Stronghold Energy II Oper, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2022 |
| 996 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 997 | Stroube Family Partnership #2 | Corsicana, TX 75151 | Oil Operator | Jun 2026 |
| 998 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 999 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 1000 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Jun 2026 |