| 801 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 802 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 803 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 804 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 805 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Nov 2024 |
| 806 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 807 | Smiley Drilling Co | Oklahoma City, OK 73156-0773 | Oil & Gas Operator | Apr 1999 |
| 808 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 809 | Snelgrooes Well Service Inc | Elmore City, OK 73433 | Oil & Gas Operator | May 2003 |
| 810 | Snuffy'S Oilfield Service Inc | Hennessey, OK 73742-6511 | Oil & Gas Operator | Nov 2014 |
| 811 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 812 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 813 | Song Production Company | Lindsay, OK 73052-0369 | Oil & Gas Operator | Jun 2015 |
| 814 | Sooner Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Sep 2005 |
| 815 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 816 | Southcreek Petroleum Co LLC | Blanchard, OK 73010-4911 | Oil & Gas Operator | Oct 2024 |
| 817 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Dec 2024 |
| 818 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 819 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 820 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Dec 2024 |
| 821 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Dec 2024 |
| 822 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Nov 2024 |
| 823 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Mar 2025 |
| 824 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 825 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 826 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Mar 2025 |
| 827 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Dec 2024 |
| 828 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2024 |
| 829 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Nov 2024 |
| 830 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2024 |
| 831 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 832 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 833 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 834 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 835 | Stesco Operating Company LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 2024 |
| 836 | Stetson Energy Corporation | Duncan, OK 73534-0098 | Oil & Gas Operator | Mar 2015 |
| 837 | Stewart Inc | Ringling, OK 73456 | Oil & Gas Operator | Dec 2024 |
| 838 | Stewart Morris E Oil Company | Oklahoma City, OK 73132 | Oil & Gas Operator | Jan 2013 |
| 839 | Stewart Morris E Operating Co LLC | Oklahoma City, OK 73172-0600 | Oil & Gas Operator | Jul 2008 |
| 840 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 841 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Mar 2025 |
| 842 | Stratco, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 843 | Stratford Well Service Inc | Pond Creek, OK 73766-0310 | Oil Operator | Nov 2003 |
| 844 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 845 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | Dec 2024 |
| 846 | Stroud Petroleum Company | Oklahoma City, OK 73156-0156 | Oil Operator | Jun 2014 |
| 847 | Struthers Oil & Gas Corp | Tulsa, OK 74133 | Oil & Gas Operator | Jan 2013 |
| 848 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 849 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 850 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 851 | Sun Amer Petro Resources Inc | Moore, OK 73153-7133 | Oil & Gas Operator | May 1993 |
| 852 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 853 | Sunbelt Oil Investments Inc | Lindsay, OK 73052 | Oil & Gas Operator | May 1993 |
| 854 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 855 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Mar 2025 |
| 856 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 857 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 858 | Survivor Oil Inc | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2007 |
| 859 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 860 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 861 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 862 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 863 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 864 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 865 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 866 | Tau Ventures | Tulsa, OK 74105-1026 | Oil & Gas Operator | Nov 2024 |
| 867 | TD Oil & Gas LLC | Duncan, OK 73533-1851 | Oil Operator | Apr 2023 |
| 868 | TD Operating Inc | Hinton, OK 73047 | Oil & Gas Operator | Dec 2024 |
| 869 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 870 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 871 | Templar Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2024 |
| 872 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 873 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Nov 2024 |
| 874 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 875 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 876 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 877 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Dec 2024 |
| 878 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 879 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 880 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2024 |
| 881 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 882 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 883 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Sep 2024 |
| 884 | TLC Oil And Gas | Duncan, OK 73533-9477 | Oil & Gas Operator | Oct 2015 |
| 885 | Toco Oil & Gas Co | Grapevine, TX 76051 | Oil & Gas Operator | Feb 1993 |
| 886 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2024 |
| 887 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 888 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Mar 2025 |
| 889 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Dec 2024 |
| 890 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Nov 2024 |
| 891 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 892 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 893 | Trace Oil & Gas LP | Cement, OK 73017 | Oil & Gas Operator | Nov 2024 |
| 894 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2024 |
| 895 | Transfuel Resources Co | Houston, TX 77215 | Oil & Gas Operator | Aug 2013 |
| 896 | Trepco Production Company, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Nov 2024 |
| 897 | Tri Production Inc | Healdton, OK 73438 | Oil & Gas Operator | Nov 2024 |
| 898 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Dec 2024 |
| 899 | Triexco Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2012 |
| 900 | Trigg Drilling Company Inc | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2013 |