| 26801 | Six-D Exploration, LLC | Hutchinson, KS 67502 | Oil Operator | Apr 2025 |
| 26802 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Nov 2025 |
| 26803 | Sixess Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 26804 | Sizemore, James | Hardin, TX 77561 | Oil & Gas Operator | Jun 2003 |
| 26805 | SJ Energy, LLC | Englewood, CO 80112 | Oil & Gas Operator | Feb 2019 |
| 26806 | SJ Ok Oil Company | Dallas, TX 75206-9925 | Oil & Gas Operator | Jun 2025 |
| 26807 | SJM Inc | Tulsa, OK 74133-1757 | Gas Operator | Apr 2006 |
| 26808 | SJM Oil LLC | | Oil & Gas Operator | Dec 2009 |
| 26809 | Sju Holdings LLC | Norman, OK 73072 | Oil & Gas Operator | Jul 2025 |
| 26810 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 26811 | SK Opr Inc | Cabot, PA 16023-1250 | Gas Operator | Dec 2024 |
| 26812 | SK Plymouth LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Jun 2025 |
| 26813 | Skaar, K. M. Oil & Gas Co. | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 26814 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | Jul 2025 |
| 26815 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Nov 2025 |
| 26816 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 26817 | Skelton Operating Co., Inc. | | Oil & Gas Operator | Aug 1980 |
| 26818 | Skelton, D.W. | | Oil Operator | Dec 1952 |
| 26819 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Nov 2025 |
| 26820 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Nov 2025 |
| 26821 | Skidgel Enterprises Inc | Rawlins, WY 82301 | Oil & Gas Operator | Sep 2018 |
| 26822 | Skidmore Energy,Inc. | Salado, TX 76571 | Oil & Gas Operator | Jun 1999 |
| 26823 | Skidmore Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jul 1997 |
| 26824 | Skidmore, James E. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2008 |
| 26825 | Skinner Cattle, Inc. | Nocona, TX 76255 | Oil Operator | Nov 2025 |
| 26826 | Skinner Corporation | | Oil Operator | Apr 1985 |
| 26827 | Skinner Energy Management, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Jan 2011 |
| 26828 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
| 26829 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
| 26830 | Skinner, Robert V. | Spearman, TX 79081 | Oil & Gas Operator | Aug 2008 |
| 26831 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2025 |
| 26832 | Skinnergy Co. | Spearman, TX 79081 | Oil & Gas Operator | Nov 2025 |
| 26833 | Skipworth, Joseph D | | Oil Operator | Dec 2021 |
| 26834 | SKKM Oil Company | | Oil Operator | Dec 1992 |
| 26835 | Sklar | | Oil & Gas Operator | Dec 2024 |
| 26836 | Sklar & Phillips - Harry Hurt | | Oil & Gas Operator | Jul 1986 |
| 26837 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 26838 | Sklar & Phillips Oil Co.-Entex | | Oil & Gas Operator | Aug 1978 |
| 26839 | Sklar &Phillips-Great Southern | | Oil & Gas Operator | Aug 1980 |
| 26840 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2025 |
| 26841 | Sklar-Tex L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 26842 | Skora, James B. | Lawtons, NY 14091 | Gas Operator | Dec 2024 |
| 26843 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 26844 | Skrzynski, Thomas J. | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 26845 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Nov 2025 |
| 26846 | Skubis, Daniel J. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 26847 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Jul 2025 |
| 26848 | Skull Creek Oil & Gas LLC | | Oil Operator | Jun 2025 |
| 26849 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 26850 | Sky Oil, L.L.C. | St. Paul, KS 66771 | Oil Operator | Dec 2004 |
| 26851 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 2025 |
| 26852 | Skybox, LLC | | Gas Operator | Dec 2021 |
| 26853 | Skybridge Energy LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2025 |
| 26854 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2025 |
| 26855 | Skye MS, LLC | | Oil & Gas Operator | Aug 2025 |
| 26856 | Skyhawk Energy, LLC | | Oil Operator | Dec 2024 |
| 26857 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
| 26858 | Skyline Operating Company, LLC | Alpine, UT 84004 | Oil & Gas Operator | Jul 2025 |
| 26859 | Skyliner Energy LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 26860 | Skytop Oil & Gas | Giddings, TX 78942 | Oil & Gas Operator | Nov 2025 |
| 26861 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 26862 | SKZ Inc. | | Oil Operator | Mar 1988 |
| 26863 | Slack Oil & Gas | Refugio, TX 78377 | Oil & Gas Operator | Dec 2012 |
| 26864 | Slack, R. C. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2000 |
| 26865 | Slagel, H. P. Prod. Co. | Snyder, TX 79550 | Oil & Gas Operator | Dec 2006 |
| 26866 | Slam Resources, Inc. | | Oil & Gas Operator | Apr 1994 |
| 26867 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2025 |
| 26868 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |
| 26869 | Slape Oil Company, Inc. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 26870 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2025 |
| 26871 | Slate River Resources LLC | Denver, CO 80293 | Oil & Gas Operator | Apr 2008 |
| 26872 | Slatex Well Service, Inc. | Batson, TX 77519 | Oil Operator | Nov 2025 |
| 26873 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
| 26874 | Slaughter, Norman C. | | Oil & Gas Operator | Dec 2012 |
| 26875 | Slavens II Paul R | Tulsa, OK 74131 | Oil & Gas Operator | Jul 2025 |
| 26876 | Slawson Clifford Ray | Healdton, OK 73438 | Oil Operator | Jan 1995 |
| 26877 | Slawson Donald C | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 26878 | Slawson Explorat | | Oil & Gas Operator | Dec 1996 |
| 26879 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 26880 | Slayton Resources Inc | Roswell, NM 88202 | Oil & Gas Operator | Aug 2025 |
| 26881 | Sledge Bros. Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Mar 2016 |
| 26882 | Sledge Olen | Duncan, OK 73533 | Oil Operator | Aug 2025 |
| 26883 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 26884 | Sleeth And Brooks Oil Co. | | Oil Operator | Jul 1989 |
| 26885 | Slick Inc. | MC Gregor, TX 76657 | Oil Operator | Nov 2025 |
| 26886 | Slick Production Inc | Tulsa, OK 74132-1718 | Oil & Gas Operator | Apr 2020 |
| 26887 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 26888 | Slik-Dril P & A Inc | | Oil & Gas Operator | Sep 1989 |
| 26889 | Slik-Dril, Inc | | Oil & Gas Operator | Nov 1998 |
| 26890 | Slim Hole Inc | Farmington, NM 87401-7725 | Oil & Gas Operator | May 2013 |
| 26891 | Slingshot Oil & Gas | Houston, TX 77019 | Oil Operator | Nov 2025 |
| 26892 | Slinkard, Roberta S | | Oil Operator | May 2025 |
| 26893 | Sliverville Oil Co LLC | Bradford, PA 16701-2770 | Oil & Gas Operator | Dec 2024 |
| 26894 | SLMW Energy Comp | | Oil Operator | Jan 1989 |
| 26895 | Slo Oil, LLC | El Dorado, KS 67042 | Oil Operator | Nov 2024 |
| 26896 | Sloan Oil Corporation | Humble, TX 77347 | Oil & Gas Operator | Mar 2015 |
| 26897 | Sloan Operations | | Oil Operator | Mar 2025 |
| 26898 | Sloan Petroleum Inc. | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 26899 | Sloan Petroleum Service Inc | Guthrie, OK 73044 | Oil & Gas Operator | Aug 2025 |
| 26900 | Sloan Production Co | | Oil Operator | Jan 2013 |