| 2801 | Louisiana-Caddo Invest, Inc. | | Oil & Gas Operator | Jun 2008 |
| 2802 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 2803 | Loutex Energy, Inc. | | Oil & Gas Operator | Nov 1987 |
| 2804 | Loutex Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 2805 | Lower Lafourche Corporation | | Oil & Gas Operator | Jan 1997 |
| 2806 | Lowmar Exploration Co. | | Oil & Gas Operator | Feb 1990 |
| 2807 | Loyd E. Simar | | Oil & Gas Operator | Aug 2001 |
| 2808 | LPB Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 2809 | Lse Energy Co. | | Oil Operator | Mar 1989 |
| 2810 | Lse Energy Operating Co. Inc. | | Oil Operator | Jun 1996 |
| 2811 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 2812 | Luca Operation, LLC | | Oil & Gas Operator | Feb 2016 |
| 2813 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Feb 2026 |
| 2814 | Lucky Strike Production LLC | | Oil Operator | Dec 2024 |
| 2815 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 2816 | Luffey Gas Corp.-Graff | | Gas Operator | Oct 1994 |
| 2817 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 2818 | Luray Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 2819 | Lusk & Lusk, Inc. | | Oil & Gas Operator | Jul 1984 |
| 2820 | Luther W. Davis | | Oil & Gas Operator | Jun 1996 |
| 2821 | LVW, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2822 | Lwood Energy, Inc. | | Oil Operator | Dec 2002 |
| 2823 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2824 | Lyle Cashion Co. | | Oil & Gas Operator | Sep 1989 |
| 2825 | Lymac Exploration And Production, LLC | | Oil & Gas Operator | Jul 2016 |
| 2826 | Lyn-Que Oil & Gas, Inc. | | Oil Operator | Sep 1992 |
| 2827 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2828 | Lynal, Inc.- Michel T Halbouty | | Oil & Gas Operator | Oct 1984 |
| 2829 | Lyons Pet., McCain & Jackson | | Oil & Gas Operator | Dec 1981 |
| 2830 | Lyons Petroleum Inc.-Dykes | | Oil & Gas Operator | Oct 1988 |
| 2831 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2832 | Lyons, Hilliard & Watson, Inc. | | Oil & Gas Operator | Jan 1989 |
| 2833 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Nov 2025 |
| 2834 | M & M Drilling And Development | | Gas Operator | Dec 1988 |
| 2835 | M & M Investments | | Oil & Gas Operator | May 1990 |
| 2836 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Feb 2026 |
| 2837 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Sep 2025 |
| 2838 | M & M Production | | Oil & Gas Operator | Jun 2010 |
| 2839 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 2840 | M & S Production, Inc. | | Oil Operator | Jul 1994 |
| 2841 | M & T Petroleum Management Inc | | Oil Operator | May 1984 |
| 2842 | M & Z Engineering, Inc. | | Oil & Gas Operator | May 1998 |
| 2843 | M G Gulff | | Oil Operator | May 1988 |
| 2844 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 2845 | M P O'Meara, Jr. Inc. | | Oil & Gas Operator | Sep 2000 |
| 2846 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 2847 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 2848 | M-P Petroleum, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 2849 | M-X Oil & Gas, Inc. | | Oil & Gas Operator | Jun 1993 |
| 2850 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 2851 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 2852 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 2853 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Feb 2026 |
| 2854 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 2855 | M. H. Thomson | | Gas Operator | Dec 2014 |
| 2856 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 2857 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 2858 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 2859 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 2860 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 2861 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 2862 | M. S. Delone | | Oil Operator | Nov 1990 |
| 2863 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 2864 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 2865 | M.J. Bernos, Jr./PKR Oil, Inc. | | Gas Operator | Aug 1990 |
| 2866 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 2867 | Ma-Si, Inc. | | Oil & Gas Operator | May 1998 |
| 2868 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 2869 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Dec 2025 |
| 2870 | Maddox Energy Corp | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |
| 2871 | Maddox Oil & Gas | | Gas Operator | Jun 1982 |
| 2872 | Maddox Oil & Gas, Inc. | | Oil Operator | Apr 1983 |
| 2873 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 2874 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 2875 | Magnolia Production Company LLC | | Oil & Gas Operator | Nov 2024 |
| 2876 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 2877 | Magnum Gas Pipeline, L.L.C. | | Oil Operator | Dec 2024 |
| 2878 | Magnum Hunter Resources Corporation | | Oil & Gas Operator | Nov 2019 |
| 2879 | Magnum Minerals, Inc. | | Oil & Gas Operator | May 1998 |
| 2880 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 2881 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 2882 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 2883 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 2884 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Feb 2026 |
| 2885 | Mallard Drilling Corp. | | Oil & Gas Operator | Jan 1993 |
| 2886 | Mallard DRLG & Central Oil Co | | Gas Operator | Mar 1978 |
| 2887 | Mallard Operating LLC | | Oil & Gas Operator | Nov 2024 |
| 2888 | Mallard Petroleum, Inc. | | Oil & Gas Operator | Apr 1986 |
| 2889 | Malmac | | Gas Operator | Mar 1991 |
| 2890 | Malmac Energy Corp. | | Oil & Gas Operator | Jul 1987 |
| 2891 | Malone Oil & Gas Exploration, Inc. | | Oil Operator | Dec 2018 |
| 2892 | Malone-Killen Oil Expl. Co. | | Oil Operator | Apr 1992 |
| 2893 | Mammoth Service Group, LLC | | Oil & Gas Operator | Nov 2025 |
| 2894 | Mandalay Oil & Gas, L.L.C. | | Oil & Gas Operator | May 2008 |
| 2895 | Mandalay Trading Services Inc. | | Oil Operator | Jul 1999 |
| 2896 | Mandina & Murphy Oil Company | | Oil Operator | Nov 1990 |
| 2897 | Mann Production Co., Inc. | | Oil Operator | Nov 1995 |
| 2898 | Manna Minerals, Inc. | | Oil & Gas Operator | Apr 1989 |
| 2899 | Mannon L. Walters, Inc. | | Oil & Gas Operator | Jun 2024 |
| 2900 | Manolo Energy, Inc. | | Oil Operator | Sep 1996 |