| 801 | Lightner Harry A | | Oil & Gas Operator | May 2013 |
| 802 | Lightning Oil Co LTD | Mentor, OH 44060-4963 | Gas Operator | Dec 1998 |
| 803 | Lightning Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 804 | Lightning Productions, Inc. | | Oil & Gas Operator | Mar 1990 |
| 805 | Lignum Oil Co | | Oil & Gas Operator | Dec 1989 |
| 806 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 807 | Likover Oil Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2005 |
| 808 | Lil Dab Petroleum Inc | Ringling, OK 73456 | Oil Operator | Aug 2025 |
| 809 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 810 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 811 | Lillard Pipe & Supply Inc | Shawnee, OK 74802-0847 | Oil & Gas Operator | Nov 2014 |
| 812 | Lilley, C.C., Inc. | Dallardsville, TX 77332 | Oil & Gas Operator | Dec 2025 |
| 813 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 814 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 815 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |
| 816 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 817 | Lime Rock Resources II-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 818 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 819 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 820 | Lime Rock Resources V-A, L.P. | | Oil & Gas Operator | Oct 2025 |
| 821 | Limestone Exploration II, LLC | Midland, TX 79704 | Oil & Gas Operator | Jun 2019 |
| 822 | Limestone Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2011 |
| 823 | Limestone Oil & Gas Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2002 |
| 824 | Limestone Productions | Bartlesville, OK 74006-8229 | Oil & Gas Operator | Sep 2013 |
| 825 | Limited Resources | Perryton, TX 79070 | Oil & Gas Operator | Aug 2003 |
| 826 | Linam Harry Dba Sooner State Production | Marlow, OK 73055-0583 | Oil & Gas Operator | Apr 2015 |
| 827 | Linam Richard Dwayne | Marlow, OK 73055-8658 | Oil Operator | Aug 2025 |
| 828 | Linan Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 829 | Linc Gulf Coast Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Dec 2025 |
| 830 | Lincero LLC | Sinclair, WY 82334 | Oil Operator | Nov 2025 |
| 831 | Linco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Dec 2025 |
| 832 | Lincoln 77 Inc | Chanute, KS 66720 | Oil Operator | Dec 2001 |
| 833 | Lincoln Energy Corporation | Dennis, MA 02638 | Oil & Gas Operator | Dec 2021 |
| 834 | Lincoln Energy Partners, LLC | Graham, TX 76450 | Oil Operator | Dec 2025 |
| 835 | Lincoln MGMT Co | Greensburg, PA 15601-5200 | Oil & Gas Operator | Dec 2017 |
| 836 | Lincoln Oil Well Service | Riverside, IL 60546 | Oil & Gas Operator | Dec 1990 |
| 837 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 838 | Lincoln Tank Truck Service Inc | Stroud, OK 74079-0662 | Oil & Gas Operator | May 2013 |
| 839 | Lincoln Ventures LLC | Inola, OK 74036-5035 | Oil & Gas Operator | Sep 2025 |
| 840 | Lind Oil & Gas | Tulsa, OK 74136 | Gas Operator | Nov 2000 |
| 841 | Lindell & Maney | Warren, PA 16365-3643 | Oil & Gas Operator | Dec 2008 |
| 842 | Lindell & Maney LLC | Warren, PA 16365-3670 | Oil & Gas Operator | Dec 2024 |
| 843 | Lindemann, James D. | Holliday, TX 76366 | Oil & Gas Operator | Mar 2008 |
| 844 | Lindemann, Robert Operating | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 845 | Lindemann, W. L., DRLG. Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1994 |
| 846 | Lindemann, W.L., Oper. Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2006 |
| 847 | Lindenmuth & Associates | | Oil & Gas Operator | Aug 2001 |
| 848 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 849 | Lindenmuth & Associates, Etex | Austin, TX 78703 | Oil & Gas Operator | Jun 2002 |
| 850 | Linder Energy/La General Oil | | Oil & Gas Operator | Mar 1989 |
| 851 | Linder Oil Company | | Oil & Gas Operator | Apr 1985 |
| 852 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Dec 2025 |
| 853 | Linder, John G. Jr. | Gladewater, TX 75647 | Oil & Gas Operator | Apr 2005 |
| 854 | Linder, John Operating Co., LLC | Gladewater, TX 75647 | Oil & Gas Operator | Dec 2025 |
| 855 | Lindholm Oil, Inc. | Mathis, TX 78368 | Gas Operator | Sep 2002 |
| 856 | Lindley, J. R. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2002 |
| 857 | Lindow Oil & Gas, LLC | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2025 |
| 858 | Lindsay Oil Operations | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2010 |
| 859 | Lindsay, Dick | Graham, TX 76450 | Oil & Gas Operator | May 2015 |
| 860 | Lindsay, Robert L. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1995 |
| 861 | Lindsey, W W | Pikeville, KY 41501 | Oil & Gas Operator | Dec 2023 |
| 862 | Lindsey, W W & Elliott, W E | | Oil & Gas Operator | Dec 2023 |
| 863 | Lindsey, W W & Elliott, W E Dba Lindsey & Elliott | | Oil & Gas Operator | Dec 2023 |
| 864 | Lindsey, W W Et Al | | Gas Operator | Dec 2023 |
| 865 | Lindstrom, Bruce C. | Sinclairville, NY 14782 | Gas Operator | Dec 2024 |
| 866 | Line Energy LLC | Columbus, NE 68601 | Oil Operator | Apr 2025 |
| 867 | Line, Jerry W., SR. | Tulsa, OK 74137 | Oil Operator | Nov 1996 |
| 868 | Link Oil Company (The) | Tulsa, OK 74103-4113 | Oil & Gas Operator | Jan 2014 |
| 869 | Linmar Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Oct 1987 |
| 870 | Linmar Petroleum Company | Denver, CO 80237 | Oil & Gas Operator | Oct 1995 |
| 871 | Linn Bros Oil & Gas Inc | Fruita, CO 81521 | Oil & Gas Operator | Oct 2025 |
| 872 | Linn Mid-Continent Operating Inc | Houston, TX 77002-3018 | Oil & Gas Operator | Jun 2016 |
| 873 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 874 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 875 | Linn Opr Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Dec 2007 |
| 876 | Linn Opr LLC | Indiana, PA 15701-8914 | Gas Operator | Dec 2004 |
| 877 | Linn Western Operating Inc. | | Oil & Gas Operator | Jan 2018 |
| 878 | Linop Corporation | Austin, TX 78728 | Oil & Gas Operator | Dec 2025 |
| 879 | Linville Natural Gas Co. Inc. | | Gas Operator | Sep 2000 |
| 880 | Lio-1 Corporation | Las Vegas, NV 89116 | Oil Operator | Feb 2025 |
| 881 | Lion Energy Co LLC | Wexford, PA 15090-6315 | Oil & Gas Operator | Dec 2014 |
| 882 | Lion Oil & Gas Company LLC | | Oil & Gas Operator | Dec 1993 |
| 883 | Lion Oil Company | Chanute, KS 66720 | Oil Operator | Dec 1986 |
| 884 | Lion Petroleum Company | Oklahoma City, OK 73120-4503 | Oil & Gas Operator | Aug 2015 |
| 885 | Lion Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 886 | Lionheart Energy Corporation | Durango, CO 81301 | Oil & Gas Operator | Dec 2025 |
| 887 | Lions Den Operating LLC | Carthage, TX 75633 | Gas Operator | Dec 2025 |
| 888 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Dec 2025 |
| 889 | Lippizan Petroleum, Inc. | Ellenboro, WV 26346 | Oil & Gas Operator | Dec 2024 |
| 890 | Lipps, Alfred J. | Burnsville, WV 26355-0000 | Oil & Gas Operator | Sep 2017 |
| 891 | Liquid Petroleum Resources, Inc. | Amarillo, TX 79120 | Gas Operator | Dec 2025 |
| 892 | Lischer, Michael J. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 893 | Lishberg Petroleum Inc | Jerusaleum, OH 43747 | Oil & Gas Operator | Dec 2024 |
| 894 | Lissner, Lindy | Jourdanton, TX 78026 | Oil & Gas Operator | Dec 2025 |
| 895 | Lissolo J W | Yuma, AZ 85365 | Oil & Gas Operator | Feb 2017 |
| 896 | Lissolo Timothy C | Newcastle, WY 82701 | Oil Operator | Nov 2025 |
| 897 | Liston V Dean | Nowata, OK 74048-5200 | Oil & Gas Operator | Nov 2016 |
| 898 | Litan, David | Wichita, KS 67218 | Oil Operator | Jun 1990 |
| 899 | Litchfield Production Co. | Nederland, TX 77627 | Oil & Gas Operator | Dec 2025 |
| 900 | Lithos Exploration Inc | | Oil & Gas Operator | Nov 2014 |