| 2701 | Lee Mills | | Oil Operator | Feb 1992 |
| 2702 | Lee Roy Daigle | | Oil Operator | Dec 1992 |
| 2703 | Leeward Operators LLC | | Oil & Gas Operator | Jul 2011 |
| 2704 | Legacy Energy, LLC | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 2705 | Legacy Operating Company | | Oil & Gas Operator | Aug 1992 |
| 2706 | Legacy Resources Co., L.P. | | Oil & Gas Operator | Apr 2019 |
| 2707 | Legend Fund, LLC | | Oil & Gas Operator | Jan 2025 |
| 2708 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 2709 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 2710 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 2711 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 2712 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 2713 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 2714 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 2715 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 2716 | Leo Windham | | Oil Operator | Jul 1992 |
| 2717 | Leroy W. & Charlie G. James | | Gas Operator | Oct 1979 |
| 2718 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 2719 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 2720 | Levi Gas Co., Inc. | | Gas Operator | Mar 2019 |
| 2721 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 2722 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 2723 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 2724 | Lewis Williams | | Oil & Gas Operator | Feb 1991 |
| 2725 | Lexico Exploration | | Oil Operator | Mar 1986 |
| 2726 | LGS Exploration Program | | Gas Operator | Jul 1990 |
| 2727 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 2728 | LHC Petroleum Corporation | | Oil & Gas Operator | Jul 2001 |
| 2729 | Li'L Sugar Oil Company | | Oil Operator | Nov 2019 |
| 2730 | Liberty Exploration Co. | | Oil Operator | Apr 1987 |
| 2731 | Liberty Oil & Gas Co., Inc. | | Oil Operator | Feb 1991 |
| 2732 | Liberty Oil & Gas Corp | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 2733 | Liberty Operating Company,LLC | | Oil & Gas Operator | Jan 2026 |
| 2734 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2735 | Lighthouse Operating, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jun 2021 |
| 2736 | Lightning Productions, Inc. | | Oil & Gas Operator | Mar 1990 |
| 2737 | Lignum Oil Co | | Oil & Gas Operator | Dec 1989 |
| 2738 | Limited Resources | Perryton, TX 79070 | Oil & Gas Operator | Aug 2003 |
| 2739 | Lindenmuth & Associates | | Oil & Gas Operator | Aug 2001 |
| 2740 | Linder Energy/La General Oil | | Oil & Gas Operator | Mar 1989 |
| 2741 | Linder Oil Company | | Oil & Gas Operator | Apr 1985 |
| 2742 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Feb 2026 |
| 2743 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 2744 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 2745 | Linville Natural Gas Co. Inc. | | Gas Operator | Sep 2000 |
| 2746 | Little & Whyte Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2008 |
| 2747 | Littlefield Oil & Gas Company | | Oil & Gas Operator | Jan 1990 |
| 2748 | Live Oak Energy, Inc. | | Oil & Gas Operator | Dec 2011 |
| 2749 | Live Oak Petroleum, Inc. | Dallas, TX 75251 | Gas Operator | Mar 2001 |
| 2750 | Lko Operating LLC | | Oil & Gas Operator | Feb 2017 |
| 2751 | LL&N Oil & Gas Co., Inc. | | Oil Operator | Sep 1982 |
| 2752 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 2753 | Llog Expl. Co.-Biggs | | Oil Operator | Sep 1985 |
| 2754 | Llog Exploration & Prod Co | | Oil & Gas Operator | Jul 2000 |
| 2755 | Llog Exploration Company, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 2756 | Llog Production Company | Metairie, LA 70005 | Oil & Gas Operator | Nov 2025 |
| 2757 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Feb 2026 |
| 2758 | Lloyd E. Hargrove | | Oil & Gas Operator | Aug 1998 |
| 2759 | Lloyd M McKenzie | | Oil Operator | Mar 2001 |
| 2760 | LNG Gathering Company | | Oil Operator | Oct 2024 |
| 2761 | Lobo Operating, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2024 |
| 2762 | Loch Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 2763 | Lock Arbor Production Co | | Gas Operator | Aug 1987 |
| 2764 | Locust Ridge Gas Company | | Oil Operator | Mar 2003 |
| 2765 | Loe Oil & Gas Corporation | | Gas Operator | Dec 1977 |
| 2766 | Loe Pipe Yard, Inc. | | Oil & Gas Operator | Jan 1997 |
| 2767 | Logue And Patterson, Inc. | | Oil & Gas Operator | Nov 1991 |
| 2768 | Long Acres Prod. Co., Inc. | | Oil & Gas Operator | Aug 1986 |
| 2769 | Long Bros. Oil Co. | | Oil Operator | Jul 2015 |
| 2770 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 2771 | Long Oil And Gas Expl., LTD | | Oil & Gas Operator | Apr 1988 |
| 2772 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 2773 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 2774 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 2775 | Longleaf Gas & Oil | | Oil Operator | May 2010 |
| 2776 | Longview Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2002 |
| 2777 | Longville Production Co., Inc. | | Oil & Gas Operator | Sep 1995 |
| 2778 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 2779 | Lou-Tex Oil & Gas Co. | | Oil & Gas Operator | Jun 1987 |
| 2780 | Louis J. Roussel | | Oil & Gas Operator | Sep 1991 |
| 2781 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 2782 | Louisiana Delta Oil Co, LLC | | Oil & Gas Operator | Nov 2024 |
| 2783 | Louisiana Energy & Environmental, Inc. | | Oil & Gas Operator | Aug 2015 |
| 2784 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 2785 | Louisiana Energy Corp. | | Gas Operator | Dec 1987 |
| 2786 | Louisiana Energy Investors, L.L.C. | | Oil & Gas Operator | Jun 2016 |
| 2787 | Louisiana Fuel Oil Corporation | | Oil Operator | Aug 1997 |
| 2788 | Louisiana Gas Development Corp | | Oil & Gas Operator | Jan 2025 |
| 2789 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 2790 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 2791 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 2792 | Louisiana General Petr. Corp. | | Oil & Gas Operator | Mar 1980 |
| 2793 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 2794 | Louisiana Jordan Oil Co, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2024 |
| 2795 | Louisiana Leasing & Expl, Inc. | | Oil & Gas Operator | Apr 2011 |
| 2796 | Louisiana Minerals, LTD. | Houston, TX 77024 | Oil & Gas Operator | Jul 1988 |
| 2797 | Louisiana Offshore Exploration, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 2798 | Louisiana Operating Co., Inc. | | Oil & Gas Operator | Aug 1994 |
| 2799 | Louisiana Resources Co | | Oil Operator | May 1992 |
| 2800 | Louisiana Tank, Inc. | | Oil Operator | Mar 2023 |