| 27801 | Sinclair Oil Corporation | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Aug 2006 |
| 27802 | Singer Joseph B Expl Co | Oklahoma City, OK 73118-7486 | Oil & Gas Operator | Mar 1993 |
| 27803 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 27804 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Oct 2025 |
| 27805 | Singer-Fleischaker Oil Co Inc | | Oil & Gas Operator | Jul 1987 |
| 27806 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 27807 | Singer-Fleischaker,Dillon | | Oil & Gas Operator | Aug 1979 |
| 27808 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 27809 | Singleton Investments, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2012 |
| 27810 | Singletree Resources, Inc. | | Oil Operator | Aug 2014 |
| 27811 | Sink Hole, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Dec 2000 |
| 27812 | Sinkhole Solutions, LLC | Bowling Green, KY 42103 | Oil Operator | Dec 2021 |
| 27813 | Sinow, G. S. | Pampa, TX 79066 | Oil & Gas Operator | Oct 1995 |
| 27814 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 27815 | Sip'S Oil & Gas Inc | Yukon, OK 73099 | Oil & Gas Operator | Feb 2026 |
| 27816 | Sipple Oil Co | Beattyville, KY 41311 | Oil Operator | Dec 2012 |
| 27817 | Sirius Energy Corp. | Abilene, TX 79606 | Oil Operator | Dec 2009 |
| 27818 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 27819 | Siroky Oil Management | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 27820 | Sissom Oil | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 27821 | Sissom Oil Field Services, LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 27822 | Sisters Of St. Joseph | Clarence, NY 14031 | Gas Operator | Dec 2024 |
| 27823 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 27824 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 27825 | Sitton, Ronnie Incorporated | Graford, TX 76449 | Oil & Gas Operator | Feb 2020 |
| 27826 | Situs Oil & Gas, LLC | Corpus Chrsti, TX 78414 | Oil Operator | Feb 2026 |
| 27827 | Sitwell, Inc. | | Oil Operator | May 2022 |
| 27828 | Sivad Energy No 4 | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 27829 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 27830 | Six Bar Oil LLC | Pine Haven, WY 82721 | Oil & Gas Operator | Dec 2025 |
| 27831 | Six C Oil | Bowie, TX 76230 | Oil & Gas Operator | Sep 2011 |
| 27832 | Six Oil Producers | Abilene, TX 79601 | Oil & Gas Operator | Sep 2002 |
| 27833 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 27834 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Feb 2026 |
| 27835 | Sixess Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 27836 | Sizemore, James | Hardin, TX 77561 | Oil & Gas Operator | Jun 2003 |
| 27837 | SJ Energy, LLC | Englewood, CO 80112 | Oil & Gas Operator | Feb 2019 |
| 27838 | SJ Ok Oil Company | Dallas, TX 75206-9925 | Oil & Gas Operator | Oct 2025 |
| 27839 | SJM Inc | Tulsa, OK 74133-1757 | Gas Operator | Apr 2006 |
| 27840 | SJM Oil LLC | | Oil & Gas Operator | Dec 2009 |
| 27841 | Sju Holdings LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2025 |
| 27842 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 27843 | SK Opr Inc | Cabot, PA 16023-1250 | Gas Operator | Dec 2025 |
| 27844 | SK Plymouth LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Nov 2025 |
| 27845 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 27846 | Skaggs Resources LLC | Sapulpa, OK 74066-7930 | Oil Operator | Nov 2025 |
| 27847 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | Dec 2025 |
| 27848 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Feb 2026 |
| 27849 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 27850 | Skelton Operating Co., Inc. | | Oil & Gas Operator | Aug 1980 |
| 27851 | Skelton, D.W. | | Oil Operator | Dec 1952 |
| 27852 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Feb 2026 |
| 27853 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Feb 2026 |
| 27854 | Skidgel Enterprises Inc | Rawlins, WY 82301 | Oil & Gas Operator | Sep 2018 |
| 27855 | Skidmore Energy,Inc. | Salado, TX 76571 | Oil & Gas Operator | Jun 1999 |
| 27856 | Skidmore Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 1997 |
| 27857 | Skidmore, James E. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2008 |
| 27858 | Skinner Cattle, Inc. | Nocona, TX 76255 | Oil Operator | Feb 2026 |
| 27859 | Skinner Corporation | | Oil Operator | Apr 1985 |
| 27860 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 27861 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
| 27862 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
| 27863 | Skinner, Robert V. | Spearman, TX 79081 | Oil & Gas Operator | Aug 2008 |
| 27864 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2026 |
| 27865 | Skinnergy Co. | Spearman, TX 79081 | Oil & Gas Operator | Feb 2026 |
| 27866 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 27867 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 27868 | Sklar | | Oil & Gas Operator | Dec 2024 |
| 27869 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 27870 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 27871 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 27872 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 27873 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 27874 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 27875 | Skora, James B. | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 27876 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 27877 | Skrzynski, Thomas J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 27878 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 27879 | Skubis, Daniel J. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 27880 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Jan 2026 |
| 27881 | Skull Creek Oil & Gas LLC | | Oil Operator | Nov 2025 |
| 27882 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 27883 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 27884 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 27885 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2026 |
| 27886 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 27887 | Skye MS, LLC | | Oil & Gas Operator | Dec 2025 |
| 27888 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 27889 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
| 27890 | Skyline Operating Company, LLC | Alpine, UT 84004 | Oil & Gas Operator | Dec 2025 |
| 27891 | Skyliner Energy LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 27892 | Skytop Oil & Gas | Giddings, TX 78942 | Oil & Gas Operator | Feb 2026 |
| 27893 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 27894 | SKZ Inc. | | Oil Operator | Mar 1988 |
| 27895 | Slack Oil & Gas | Refugio, TX 78377 | Oil & Gas Operator | Dec 2012 |
| 27896 | Slack, R. C. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2000 |
| 27897 | Slagel, H. P. Prod. Co. | Snyder, TX 79550 | Oil & Gas Operator | Dec 2006 |
| 27898 | Slam Resources, Inc. | | Oil & Gas Operator | Apr 1994 |
| 27899 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Feb 2026 |
| 27900 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |