| 2601 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 2602 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Feb 2026 |
| 2603 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Feb 2026 |
| 2604 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 2605 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2606 | Lowry Exploratio | | Oil Operator | May 1994 |
| 2607 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 2608 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 2609 | Lozoya, Jesus Antonio | Coldwater, KS 67029 | Oil Operator | Jan 2026 |
| 2610 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 2611 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 2612 | LRR Partnership | | Oil Operator | Sep 2023 |
| 2613 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Nov 2025 |
| 2614 | Lucky Iron | | Oil Operator | Feb 2026 |
| 2615 | Ludco Incorporat | | Gas Operator | Mar 1990 |
| 2616 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Apr 2026 |
| 2617 | Lutz, Jerry | Reed City, MI 49677 | Gas Operator | Apr 1987 |
| 2618 | Lutz, Lisa Morgan | Fayetteville, AR 72702 | Oil Operator | Feb 2026 |
| 2619 | Lutz, Scott T. Trust | Fayetteville, AR 72702 | Oil Operator | Mar 2011 |
| 2620 | Lutz, Scott Thomas, Estate Of | Fayetteville, AR 72703 | Oil Operator | Aug 1996 |
| 2621 | Lutz, Thomas C. | | Oil Operator | Dec 2009 |
| 2622 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 2623 | Lyon Oil Company | | Oil Operator | Mar 1985 |
| 2624 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 2625 | Lyons, Clarence Jr. | Chanute, KS 66720 | Oil Operator | Dec 2025 |
| 2626 | M & B Well Servi | | Oil Operator | Aug 1990 |
| 2627 | M & C Oil Inc | Indianola, NE 68034 | Oil & Gas Operator | Nov 2013 |
| 2628 | M & C Oil Incorp | | Oil Operator | Mar 1995 |
| 2629 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Feb 2026 |
| 2630 | M & D Oil Co, A General Partnership | Beaver, OK 73932 | Gas Operator | Oct 2022 |
| 2631 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Jun 2026 |
| 2632 | M & G Oil Inc | Russell, KS 67665 | Oil Operator | Feb 2026 |
| 2633 | M & K Oil Company | Gillette, WY 82717-3470 | Oil & Gas Operator | Mar 2026 |
| 2634 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 2635 | M & M Contractin | | Oil Operator | Mar 1992 |
| 2636 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | Mar 2026 |
| 2637 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 2638 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 2639 | M & M Well Service, LLC | Medicine Lodge, KS 67104 | Gas Operator | Feb 2026 |
| 2640 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | Nov 2025 |
| 2641 | M & S Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2019 |
| 2642 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |
| 2643 | M D B Operations | | Oil Operator | Dec 1988 |
| 2644 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Feb 2026 |
| 2645 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 2646 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Feb 2026 |
| 2647 | M M Resources In | | Gas Operator | Feb 1990 |
| 2648 | M S Drilling Company | | Oil Operator | Jan 2026 |
| 2649 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 2650 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 2651 | M. J. T. Enterprises | | Oil Operator | Feb 2026 |
| 2652 | M. K. Fuhrman LLC | | Oil Operator | Dec 2025 |
| 2653 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | Jan 2026 |
| 2654 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 2655 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 2656 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 2657 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 2658 | M3 Helium Corp | | Gas Operator | Feb 2026 |
| 2659 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 2660 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Jun 2026 |
| 2661 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Mar 2026 |
| 2662 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 2663 | Maco Incorporate | | Oil Operator | Jun 1984 |
| 2664 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 2665 | Mad Operators LLC | | Oil & Gas Operator | Feb 2026 |
| 2666 | Magnatex Petrole | | Oil Operator | Jun 1994 |
| 2667 | Magnatex Petroleum | | Oil Operator | Apr 1993 |
| 2668 | Magnum Engineering Company | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2026 |
| 2669 | Magnum Exploration Kansas, LLC | Lipan, TX 76462 | Oil Operator | Oct 2016 |
| 2670 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 2671 | Magnusson Karl E | | Oil Operator | Apr 1987 |
| 2672 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 2673 | Mai Operations | | Oil Operator | Dec 1996 |
| 2674 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 2675 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 2676 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 2677 | Malone Donald J | | Oil Operator | Nov 1993 |
| 2678 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 2679 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 2680 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 2681 | Manns' Atp, Inc. | Potwin, KS 67123 | Oil Operator | Oct 2025 |
| 2682 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 2683 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 2684 | Maple Leaf Energ | | Oil & Gas Operator | Sep 1989 |
| 2685 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Feb 2026 |
| 2686 | Marathon Oil Co.-Rocky Mountain Region | Cody, WY 82414 | Oil Operator | Dec 1999 |
| 2687 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 2688 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Apr 2026 |
| 2689 | Marco Oil Compan | | Oil & Gas Operator | Aug 1992 |
| 2690 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Mar 2026 |
| 2691 | Marden Producing | | Gas Operator | Aug 1990 |
| 2692 | Marden Producing Company | Edmond, OK 73083 | Gas Operator | Feb 2026 |
| 2693 | Marexco | | Oil & Gas Operator | Nov 1994 |
| 2694 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Feb 2026 |
| 2695 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 2696 | Mariah Operating Company, LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2009 |
| 2697 | Marjo Incorporat | | Oil & Gas Operator | Jun 1990 |
| 2698 | Mark III Oil, Inc. | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2699 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 2700 | Markan Oil Incor | | Oil Operator | Mar 1991 |