| 901 | Shell Western E&P | Houston, TX 77001 | Oil & Gas Operator | Apr 2024 |
| 902 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 903 | Shenandoah Oil, Inc. (I) | Midland, TX 79710 | Oil & Gas Operator | Apr 1996 |
| 904 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 905 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2024 |
| 906 | Shoreham Oil & Gas Company, Inc. | Katy, TX 77492 | Oil & Gas Operator | Apr 2024 |
| 907 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 908 | Siltstone Resources Op II, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Apr 2024 |
| 909 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2024 |
| 910 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 911 | Simpson Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2004 |
| 912 | Simray GP, LLC | Richardson, TX 75080 | Oil & Gas Operator | Dec 2015 |
| 913 | Simray Oil & Gas, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Sep 2003 |
| 914 | Simray Operating Corp. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2009 |
| 915 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Apr 2024 |
| 916 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 917 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 918 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Apr 2024 |
| 919 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 920 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 921 | Smith, John A. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 922 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 923 | Soil Energy, Inc. | Imperial, TX 79743 | Oil & Gas Operator | Apr 2024 |
| 924 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 925 | Sonat Exploration Co. - Midland | Houston, TX 77251 | Oil & Gas Operator | Mar 1999 |
| 926 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 927 | South Oil, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 928 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 929 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 930 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 931 | Sozo Natural Resources LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 932 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2024 |
| 933 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 934 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 935 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 936 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 937 | Stablerock Energy L.L.C. | Oklahoma City, OK 73106 | Oil & Gas Operator | Apr 2024 |
| 938 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 939 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 940 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jul 2021 |
| 941 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 942 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 943 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 944 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 945 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Apr 2024 |
| 946 | Stepco Oil & Gas, LLC | Coyanosa, TX 79730 | Oil & Gas Operator | Apr 2024 |
| 947 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 948 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 949 | Stephens, Mickie L. | MC Camey, TX 79752 | Oil & Gas Operator | Aug 1998 |
| 950 | Sterling Energy Resources, Inc. | Overland Park, KS 66212 | Oil Operator | May 2019 |
| 951 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 952 | Stevens Oil & Gas LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 953 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 954 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 955 | Strategy Operating, LLC | Midland, TX 79710 | Gas Operator | Apr 2024 |
| 956 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 957 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 958 | Surge Solutions, Inc. | Iraan, TX 79744 | Oil Operator | Apr 2024 |
| 959 | Sven Permian, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 960 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Feb 2024 |
| 961 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2024 |
| 962 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 963 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 964 | Tacor Resources Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 965 | Tahoe Energy, Inc. | Midland, TX 79703 | Oil & Gas Operator | Jul 1996 |
| 966 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 967 | Tandem Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 968 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 969 | Tap Rock Operating, LLC | Golden, CO 80401 | Oil & Gas Operator | Apr 2024 |
| 970 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 971 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | Apr 2024 |
| 972 | Taurus Exploration U.S.A., Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 1998 |
| 973 | Taylor, J. S. Inc. | Lewisville, TX 75057 | Oil & Gas Operator | Apr 2024 |
| 974 | Taylor-Link Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2017 |
| 975 | TCF Energy, Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 976 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 977 | Teakwood Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2019 |
| 978 | Teke Production LLC | Austin, TX 78746 | Oil Operator | Apr 2024 |
| 979 | Tekna Synergy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 980 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 981 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 982 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 983 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 984 | Terrace Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Jul 2013 |
| 985 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Apr 2024 |
| 986 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 987 | Texan Petroleum Corporation | Dallas, TX 75204 | Oil & Gas Operator | Oct 2004 |
| 988 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2024 |
| 989 | Texas Crude Operator, Inc. | Houston, TX 77098 | Oil & Gas Operator | Aug 2017 |
| 990 | Texas Investments | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 991 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 992 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 993 | Texcal Resources, Inc. | Plano, TX 75094 | Oil & Gas Operator | Apr 1994 |
| 994 | Thagard Trust | Midland, TX 79702 | Gas Operator | Apr 2024 |
| 995 | Thomas Exploration & Devel., Inc | Jourdanton, TX 78026 | Oil & Gas Operator | Apr 2024 |
| 996 | Thomas Oil And Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 997 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 998 | Thorp Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 999 | Three Rivers Operating Co II LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 1000 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |