| 901 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 902 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 903 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 904 | Sea Sand Oil Company | Fort Worth, TX 76185 | Oil & Gas Operator | Jun 1995 |
| 905 | Seay Exploration, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 906 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 907 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 908 | Sentry Exploration, Inc. | Houston, TX 77006 | Oil & Gas Operator | Jul 2025 |
| 909 | SG Interests, Inc. | Houston, TX 77010 | Oil & Gas Operator | Jun 2007 |
| 910 | SGP Operating LLC | Dallas, TX 75205 | Oil & Gas Operator | Jul 2025 |
| 911 | Shale Energy LLC | Jeffersonville, KY 40337 | Oil Operator | Dec 2018 |
| 912 | Shallow Production Oper, LLC | Austin, TX 78738 | Oil Operator | Jul 2025 |
| 913 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Jul 2025 |
| 914 | Shell Western E&P | Houston, TX 77001 | Oil & Gas Operator | Jul 2025 |
| 915 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 916 | Shenandoah Oil, Inc. (I) | Midland, TX 79710 | Oil & Gas Operator | Apr 1996 |
| 917 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 918 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 919 | Shoreham Oil & Gas Company, Inc. | Katy, TX 77492 | Oil & Gas Operator | Jul 2025 |
| 920 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 921 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Jul 2025 |
| 922 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jul 2025 |
| 923 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 924 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 925 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 926 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 927 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 928 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Jul 2025 |
| 929 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 930 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 931 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jul 2025 |
| 932 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 933 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 934 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 935 | Smith, John A. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 936 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 937 | Soil Energy, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Jul 2025 |
| 938 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 939 | Sonat Exploration Co. - Midland | Houston, TX 77251 | Oil & Gas Operator | Mar 1999 |
| 940 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 941 | South Oil, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 942 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 943 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 944 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 945 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 946 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 947 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Jul 2025 |
| 948 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2025 |
| 949 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 950 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 951 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Jul 2025 |
| 952 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | May 2025 |
| 953 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 954 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 955 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 956 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 957 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 958 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 959 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Jul 2025 |
| 960 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 961 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 962 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 963 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 964 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 965 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 966 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 967 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Jul 2025 |
| 968 | Strategy Operating, LLC | Midland, TX 79710 | Gas Operator | Jul 2025 |
| 969 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 970 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 971 | Surge Solutions, Inc. | Bandera, TX 78003 | Oil Operator | Jul 2025 |
| 972 | Sven Permian, LLC | Houston, TX 77243 | Oil & Gas Operator | Jul 2025 |
| 973 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2025 |
| 974 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 975 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 976 | Tacor Resources Inc | Midland, TX 79705 | Oil & Gas Operator | Jul 2025 |
| 977 | Tahoe Energy, Inc. | Midland, TX 79703 | Oil & Gas Operator | Jul 1996 |
| 978 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 979 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 980 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 981 | Tap Rock Operating, LLC | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 982 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | Jul 2025 |
| 983 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 984 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Jul 2025 |
| 985 | Taylor-Link Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2017 |
| 986 | TCF Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 987 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 988 | Teakwood Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2019 |
| 989 | Teke Production LLC | Houston, TX 77269 | Oil Operator | Jul 2025 |
| 990 | Tekna Synergy Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 991 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 992 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Jul 2025 |
| 993 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 994 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 995 | Terrace Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2013 |
| 996 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Jul 2025 |
| 997 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 998 | Texan Petroleum Corporation | Dallas, TX 75204 | Oil & Gas Operator | Oct 2004 |
| 999 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Jul 2025 |
| 1000 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |