| 2701 | LPB Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 2702 | Lse Energy Co. | | Oil Operator | Mar 1989 |
| 2703 | Lse Energy Operating Co. Inc. | | Oil Operator | Jun 1996 |
| 2704 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 2705 | Luca Operation, LLC | | Oil & Gas Operator | Feb 2016 |
| 2706 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Sep 2026 |
| 2707 | Lucky Strike Production LLC | | Oil Operator | Dec 2024 |
| 2708 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 2709 | Luffey Gas Corp.-Graff | | Gas Operator | Oct 1994 |
| 2710 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 2711 | Luray Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 2712 | Lusk & Lusk, Inc. | | Oil & Gas Operator | Jul 1984 |
| 2713 | Luther W. Davis | | Oil & Gas Operator | Jun 1996 |
| 2714 | LVW, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2715 | Lwood Energy, Inc. | | Oil Operator | Dec 2002 |
| 2716 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2717 | Lyle Cashion Co. | | Oil & Gas Operator | Sep 1989 |
| 2718 | Lymac Exploration And Production, LLC | | Oil & Gas Operator | Jul 2016 |
| 2719 | Lyn-Que Oil & Gas, Inc. | | Oil Operator | Sep 1992 |
| 2720 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2721 | Lynal, Inc.- Michel T Halbouty | | Oil & Gas Operator | Oct 1984 |
| 2722 | Lyons Pet., McCain & Jackson | | Oil & Gas Operator | Dec 1981 |
| 2723 | Lyons Petroleum Inc.-Dykes | | Oil & Gas Operator | Oct 1988 |
| 2724 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2725 | Lyons, Hilliard & Watson, Inc. | | Oil & Gas Operator | Jan 1989 |
| 2726 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 2727 | M & M Investments | | Oil & Gas Operator | May 1990 |
| 2728 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Sep 2026 |
| 2729 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | May 2026 |
| 2730 | M & M Production | | Oil & Gas Operator | Jun 2010 |
| 2731 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 2732 | M & S Production, Inc. | | Oil Operator | Jul 1994 |
| 2733 | M & T Petroleum Management Inc | | Oil Operator | May 1984 |
| 2734 | M & Z Engineering, Inc. | | Oil & Gas Operator | May 1998 |
| 2735 | M G Gulff | | Oil Operator | May 1988 |
| 2736 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 2737 | M P O'Meara, Jr. Inc. | | Oil & Gas Operator | Sep 2000 |
| 2738 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 2739 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 2740 | M-P Petroleum Inc | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 2741 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 2742 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 2743 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 2744 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Sep 2026 |
| 2745 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 2746 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 2747 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 2748 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 2749 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 2750 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 2751 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 2752 | M. S. Delone | | Oil Operator | Nov 1990 |
| 2753 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 2754 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 2755 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 2756 | Ma-Si, Inc. | | Oil & Gas Operator | May 1998 |
| 2757 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2026 |
| 2758 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2026 |
| 2759 | Maddox Energy Corp | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |
| 2760 | Maddox Oil & Gas, Inc. | | Oil Operator | Apr 1983 |
| 2761 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 2762 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2026 |
| 2763 | Magnolia Production Company LLC | | Oil & Gas Operator | Nov 2024 |
| 2764 | Magnum Engineering Company | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 2765 | Magnum Gas Pipeline, L.L.C. | | Oil Operator | Dec 2024 |
| 2766 | Magnum Hunter Resources Corporation | | Oil & Gas Operator | Nov 2019 |
| 2767 | Magnum Minerals, Inc. | | Oil & Gas Operator | May 1998 |
| 2768 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 2769 | Magnum Producing, LP | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 2770 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 2771 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 2772 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2026 |
| 2773 | Mallard Drilling Corp. | | Oil & Gas Operator | Jan 1993 |
| 2774 | Mallard Operating LLC | | Oil & Gas Operator | Nov 2024 |
| 2775 | Mallard Petroleum, Inc. | | Oil & Gas Operator | Apr 1986 |
| 2776 | Malmac Energy Corp. | | Oil & Gas Operator | Jul 1987 |
| 2777 | Malone Oil & Gas Exploration, Inc. | | Oil Operator | Dec 2018 |
| 2778 | Malone-Killen Oil Expl. Co. | | Oil Operator | Apr 1992 |
| 2779 | Mammoth Service Group, LLC | | Oil & Gas Operator | Dec 2025 |
| 2780 | Mandalay Oil & Gas, L.L.C. | | Oil & Gas Operator | May 2008 |
| 2781 | Mandalay Trading Services Inc. | | Oil Operator | Jul 1999 |
| 2782 | Mandina & Murphy Oil Company | | Oil Operator | Nov 1990 |
| 2783 | Mann Production Co., Inc. | | Oil Operator | Nov 1995 |
| 2784 | Manna Minerals, Inc. | | Oil & Gas Operator | Apr 1989 |
| 2785 | Mannon L. Walters, Inc. | | Oil & Gas Operator | Jun 2024 |
| 2786 | Manolo Energy, Inc. | | Oil Operator | Sep 1996 |
| 2787 | Manorado Oil Company | | Oil Operator | Feb 1999 |
| 2788 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 2789 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Sep 2026 |
| 2790 | Mantle Oil & Gas, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Sep 2026 |
| 2791 | Manursing Island Prod. Corp. | | Oil & Gas Operator | Sep 2002 |
| 2792 | Map Associates, L.P. | | Oil & Gas Operator | Mar 1995 |
| 2793 | Map Drilling Company | | Oil & Gas Operator | Apr 2012 |
| 2794 | Map Oil Co. | | Oil Operator | Jan 1978 |
| 2795 | Mapco Oil & Gas Company | Tulsa, OK 74101-2115 | Oil & Gas Operator | Jan 1985 |
| 2796 | Mapco Production Co | Billings, MT 59102 | Oil & Gas Operator | Apr 1994 |
| 2797 | Maple Gulf Coast Props. Corp. | | Oil & Gas Operator | Jun 1989 |
| 2798 | Mar-Bec Energy Company, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | May 2001 |
| 2799 | Mar-Low Corporation | | Oil & Gas Operator | Mar 1992 |
| 2800 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |