| 2701 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 2702 | Lio-1 Corporation | Las Vegas, NV 89116 | Oil Operator | Sep 2025 |
| 2703 | Lion Oil Company | Chanute, KS 66720 | Oil Operator | Dec 1986 |
| 2704 | Litan, David | Wichita, KS 67218 | Oil Operator | Jun 1990 |
| 2705 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Nov 2025 |
| 2706 | Little Guy Oil & Gas, Inc. | Pratt, KS 67124 | Oil Operator | Aug 2013 |
| 2707 | Little Joe'S Oil Company | | Oil Operator | Jul 2020 |
| 2708 | Little Neil Oil | | Oil Operator | Jul 1994 |
| 2709 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2025 |
| 2710 | Lloyd Drilling C | | Oil Operator | Aug 1995 |
| 2711 | Lloyd Drilling Company | Morland, KS 67650 | Oil Operator | Oct 2009 |
| 2712 | Lobo Oil & Gas, LLC | Benedict, KS 66714 | Oil Operator | Jan 2019 |
| 2713 | Lobo Production, Inc | Goodland, KS 67735 | Gas Operator | Sep 2025 |
| 2714 | Lockard Petroleum, Inc. | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 2715 | Lockhart Oil LLC | Neosho Falls, KS 66758 | Oil Operator | Jul 2025 |
| 2716 | Lockridge, John P | Denver, CO 80202 | Gas Operator | Mar 1999 |
| 2717 | Loeb Herman L | | Oil & Gas Operator | Jan 1996 |
| 2718 | Loewen E K | | Oil Operator | Mar 1986 |
| 2719 | Loewen Operator | | Oil & Gas Operator | Mar 1995 |
| 2720 | Loewen Operator, Inc. | Canton, KS 67428 | Oil & Gas Operator | Sep 2025 |
| 2721 | Logsdon Richard | | Oil Operator | Mar 1988 |
| 2722 | Lone Jack Oil Co. | | Oil Operator | Sep 2025 |
| 2723 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 2724 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2025 |
| 2725 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 2726 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Feb 2026 |
| 2727 | Lone Wolf Oil & Gas Co., LLC | Moline, KS 67353 | Oil & Gas Operator | Sep 2025 |
| 2728 | Lone Wolf Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 2729 | Long And Ware Oil, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 2730 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Sep 2025 |
| 2731 | Long Shot Oil Co. | | Oil Operator | Aug 1997 |
| 2732 | Long, Edwin A. And Glenda | Hamilton, KS 66853 | Oil Operator | Aug 2000 |
| 2733 | Long, Lewis C., A General Partnership | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 2734 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 2735 | Longhorn Crude, LLC | Jetmore, KS 67854 | Oil Operator | Sep 2025 |
| 2736 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 2737 | Longhorn Oil & Gas | | Oil Operator | Sep 2025 |
| 2738 | Longhorn Propert | | Oil Operator | Feb 1989 |
| 2739 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 2740 | Longton Explorations | | Oil & Gas Operator | Aug 2025 |
| 2741 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 2742 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 2743 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 2744 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Sep 2025 |
| 2745 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Sep 2025 |
| 2746 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 2747 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2748 | Lowry Exploratio | | Oil Operator | May 1994 |
| 2749 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 2750 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 2751 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 2752 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 2753 | LRR Partnership | | Oil Operator | Sep 2023 |
| 2754 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Sep 2025 |
| 2755 | Lucky Iron | | Oil Operator | Sep 2025 |
| 2756 | Ludco Incorporat | | Gas Operator | Mar 1990 |
| 2757 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Dec 2025 |
| 2758 | Lutz, Jerry | Reed City, MI 49677 | Gas Operator | Apr 1987 |
| 2759 | Lutz, Lisa Morgan | Fayetteville, AR 72702 | Oil Operator | Sep 2025 |
| 2760 | Lutz, Scott T. Trust | Fayetteville, AR 72702 | Oil Operator | Mar 2011 |
| 2761 | Lutz, Scott Thomas, Estate Of | Fayetteville, AR 72703 | Oil Operator | Aug 1996 |
| 2762 | Lutz, Thomas C. | | Oil Operator | Dec 2009 |
| 2763 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2764 | Lyon Oil Company | | Oil Operator | Mar 1985 |
| 2765 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 2766 | Lyons, Clarence Jr. | Chanute, KS 66720 | Oil Operator | Aug 2025 |
| 2767 | M & B Well Servi | | Oil Operator | Aug 1990 |
| 2768 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 2769 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 2770 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Sep 2025 |
| 2771 | M & D Oil Co, A General Partnership | Beaver, OK 73932 | Gas Operator | Oct 2022 |
| 2772 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Feb 2026 |
| 2773 | M & G Oil Inc | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 2774 | M & K Oil Company | Gillette, WY 82717-3470 | Oil & Gas Operator | Dec 2025 |
| 2775 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 2776 | M & M Contractin | | Oil Operator | Mar 1992 |
| 2777 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | Dec 2025 |
| 2778 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Sep 2025 |
| 2779 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 2780 | M & M Well Service, LLC | Medicine Lodge, KS 67104 | Gas Operator | Sep 2025 |
| 2781 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | May 2025 |
| 2782 | M & S Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2019 |
| 2783 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |
| 2784 | M D B Operations | | Oil Operator | Dec 1988 |
| 2785 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Sep 2025 |
| 2786 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 2787 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2025 |
| 2788 | M M Resources In | | Gas Operator | Feb 1990 |
| 2789 | M S Drilling Company | | Oil Operator | Feb 2025 |
| 2790 | M&M Services LLC | Neodesha, KS 66757 | Gas Operator | Sep 2025 |
| 2791 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 2792 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 2793 | M. J. T. Enterprises | | Oil Operator | Sep 2025 |
| 2794 | M. K. Fuhrman LLC | | Oil Operator | Sep 2025 |
| 2795 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 2796 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 2797 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 2798 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 2799 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 2800 | M3 Helium Corp | | Gas Operator | Sep 2025 |