| 2701 | Long Acres Prod. Co., Inc. | | Oil & Gas Operator | Aug 1986 |
| 2702 | Long Bros. Oil Co. | | Oil Operator | Jul 2015 |
| 2703 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 2704 | Long Oil And Gas Expl., LTD | | Oil & Gas Operator | Apr 1988 |
| 2705 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 2706 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 2707 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 2708 | Longleaf Gas & Oil | | Oil Operator | May 2010 |
| 2709 | Longview Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2002 |
| 2710 | Longville Production Co., Inc. | | Oil & Gas Operator | Sep 1995 |
| 2711 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 2712 | Lou-Tex Oil & Gas Co. | | Oil & Gas Operator | Jun 1987 |
| 2713 | Louis J. Roussel | | Oil & Gas Operator | Sep 1991 |
| 2714 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 2715 | Louisiana Delta Oil Co, LLC | | Oil & Gas Operator | Nov 2024 |
| 2716 | Louisiana Energy & Environmental, Inc. | | Oil & Gas Operator | Aug 2015 |
| 2717 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2718 | Louisiana Energy Investors, L.L.C. | | Oil & Gas Operator | Jun 2016 |
| 2719 | Louisiana Fuel Oil Corporation | | Oil Operator | Aug 1997 |
| 2720 | Louisiana Gas Development Corp | | Oil & Gas Operator | Jan 2025 |
| 2721 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 2722 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 2723 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 2724 | Louisiana General Petr. Corp. | | Oil & Gas Operator | Mar 1980 |
| 2725 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 2726 | Louisiana Jordan Oil Co, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2024 |
| 2727 | Louisiana Leasing & Expl, Inc. | | Oil & Gas Operator | Apr 2011 |
| 2728 | Louisiana Minerals, LTD. | Houston, TX 77024 | Oil & Gas Operator | Jul 1988 |
| 2729 | Louisiana Offshore Exploration, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 2730 | Louisiana Operating Co., Inc. | | Oil & Gas Operator | Aug 1994 |
| 2731 | Louisiana Resources Co | | Oil Operator | May 1992 |
| 2732 | Louisiana Tank, Inc. | | Oil Operator | Mar 2023 |
| 2733 | Louisiana-Caddo Invest, Inc. | | Oil & Gas Operator | Jun 2008 |
| 2734 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 2735 | Loutex Energy, Inc. | Shrevesport, LA 71101 | Oil & Gas Operator | Apr 1992 |
| 2736 | Loutex Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 2737 | Lower Lafourche Corporation | | Oil & Gas Operator | Jan 1997 |
| 2738 | Lowmar Exploration Co. | | Oil & Gas Operator | Feb 1990 |
| 2739 | Loyd E. Simar | | Oil & Gas Operator | Aug 2001 |
| 2740 | LPB Oil Company | | Oil & Gas Operator | Apr 1991 |
| 2741 | Lse Energy Co. | | Oil Operator | Mar 1989 |
| 2742 | Lse Energy Operating Co. Inc. | | Oil Operator | Jun 1996 |
| 2743 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 2744 | Luca Operation, LLC | | Oil & Gas Operator | Feb 2016 |
| 2745 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Apr 2025 |
| 2746 | Lucky Strike Production LLC | | Oil Operator | Dec 2024 |
| 2747 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 2748 | Luffey Gas Corp.-Graff | | Gas Operator | Oct 1994 |
| 2749 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 2750 | Luray Oil Co., L.L.C. | | Oil Operator | Jan 2025 |
| 2751 | Lusk & Lusk, Inc. | | Oil & Gas Operator | Jul 1984 |
| 2752 | Luther W. Davis | | Oil & Gas Operator | Jun 1996 |
| 2753 | LVW, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2754 | Lwood Energy, Inc. | | Oil Operator | Dec 2002 |
| 2755 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2756 | Lyle Cashion Company | | Oil & Gas Operator | Sep 1989 |
| 2757 | Lymac Exploration And Production, LLC | | Oil & Gas Operator | Jul 2016 |
| 2758 | Lyn-Que Oil & Gas, Inc. | | Oil Operator | Sep 1992 |
| 2759 | Lynal, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2760 | Lynal, Inc.- Michel T Halbouty | | Oil & Gas Operator | Oct 1984 |
| 2761 | Lyons Pet., McCain & Jackson | | Oil & Gas Operator | Dec 1981 |
| 2762 | Lyons Petroleum Inc.-Dykes | | Oil & Gas Operator | Oct 1988 |
| 2763 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 2764 | Lyons, Hilliard & Watson, Inc. | | Oil & Gas Operator | Jan 1989 |
| 2765 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Dec 2024 |
| 2766 | M & M Drilling And Development | | Gas Operator | Dec 1988 |
| 2767 | M & M Investments | | Oil & Gas Operator | May 1990 |
| 2768 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Apr 2025 |
| 2769 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Dec 2024 |
| 2770 | M & M Production | | Oil & Gas Operator | Jun 2010 |
| 2771 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 2772 | M & S Production, Inc. | | Oil Operator | Jul 1994 |
| 2773 | M & T Petroleum Management Inc | | Oil Operator | May 1984 |
| 2774 | M & Z Engineering, Inc. | | Oil & Gas Operator | May 1998 |
| 2775 | M G Gulff | | Oil Operator | May 1988 |
| 2776 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 2777 | M P O'Meara, Jr. Inc. | | Oil & Gas Operator | Sep 2000 |
| 2778 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 2779 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 2780 | M-P Petroleum, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 2781 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 2782 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 2783 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 2784 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Apr 2025 |
| 2785 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 2786 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 2787 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 2788 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 2789 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 2790 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 2791 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 2792 | M. S. Delone | | Oil Operator | Nov 1990 |
| 2793 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 2794 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 2795 | M.J. Bernos, Jr./PKR Oil, Inc. | | Gas Operator | Aug 1990 |
| 2796 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 2797 | Ma-Si, Inc. | | Oil & Gas Operator | May 1998 |
| 2798 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 2799 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Feb 2025 |
| 2800 | Maddox Energy Corporation | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |