| 2701 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Jun 2025 |
| 2702 | M & D Oil Co, A General Partnership | Beaver, OK 73932 | Gas Operator | Oct 2022 |
| 2703 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Dec 2025 |
| 2704 | M & G Oil Inc | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 2705 | M & K Oil Company | Gillette, WY 82717-3470 | Oil & Gas Operator | Aug 2025 |
| 2706 | M & L Oil Compan | | Oil Operator | Jun 1993 |
| 2707 | M & M Contractin | | Oil Operator | Mar 1992 |
| 2708 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | Sep 2025 |
| 2709 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Jun 2025 |
| 2710 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 2711 | M & M Well Service, LLC | Medicine Lodge, KS 67104 | Gas Operator | Jun 2025 |
| 2712 | M & O Oil Co.A General Partnership | Fredonia, KS 66736 | Oil Operator | May 2025 |
| 2713 | M & S Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2019 |
| 2714 | M & W Oil LLC | Hamilton, KS 66853 | Oil Operator | Nov 2015 |
| 2715 | M D B Operations | | Oil Operator | Dec 1988 |
| 2716 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jun 2025 |
| 2717 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 2718 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Aug 2025 |
| 2719 | M M Resources In | | Gas Operator | Feb 1990 |
| 2720 | M S Drilling Company | | Oil Operator | Feb 2025 |
| 2721 | M&M Services LLC | Neodesha, KS 66757 | Gas Operator | Jun 2025 |
| 2722 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 2723 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 2724 | M. J. T. Enterprises | | Oil Operator | Jun 2025 |
| 2725 | M. K. Fuhrman LLC | | Oil Operator | May 2025 |
| 2726 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 2727 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 2728 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 2729 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 2730 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 2731 | M3 Helium Corp | | Gas Operator | Jun 2025 |
| 2732 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 2733 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Dec 2025 |
| 2734 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Sep 2025 |
| 2735 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 2736 | Maco Incorporate | | Oil Operator | Jun 1984 |
| 2737 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 2738 | Mad Operators LLC | | Oil & Gas Operator | Jun 2025 |
| 2739 | Magnatex Petrole | | Oil Operator | Jun 1994 |
| 2740 | Magnatex Petroleum | | Oil Operator | Apr 1993 |
| 2741 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 2742 | Magnum Exploration Kansas, LLC | Lipan, TX 76462 | Oil Operator | Oct 2016 |
| 2743 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 2744 | Magnusson Karl E | | Oil Operator | Apr 1987 |
| 2745 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 2746 | Mai Operations | | Oil Operator | Dec 1996 |
| 2747 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 2748 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 2749 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 2750 | Mallonee-Mahoney | | Oil & Gas Operator | Dec 1994 |
| 2751 | Malone Donald J | | Oil Operator | Nov 1993 |
| 2752 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 2753 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 2754 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 2755 | Manns' Atp, Inc. | Potwin, KS 67123 | Oil Operator | Jun 2025 |
| 2756 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 2757 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 2758 | Maple Leaf Energ | | Oil & Gas Operator | Sep 1989 |
| 2759 | Mapleton Gas Pipeline, Inc. | Mapleton, KS 66754 | Gas Operator | Jun 2011 |
| 2760 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Jun 2025 |
| 2761 | Marathon Oil Co.-Rocky Mountain Region | Cody, WY 82414 | Oil Operator | Dec 1999 |
| 2762 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 2763 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 2764 | Marco Oil Compan | | Oil & Gas Operator | Aug 1992 |
| 2765 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2025 |
| 2766 | Marden Producing | | Gas Operator | Aug 1990 |
| 2767 | Marden Producing Company | Edmond, OK 73083 | Gas Operator | Jun 2025 |
| 2768 | Marexco | | Oil & Gas Operator | Nov 1994 |
| 2769 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2025 |
| 2770 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 2771 | Mariah Operating Company, LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2009 |
| 2772 | Marjo Incorporat | | Oil & Gas Operator | Jun 1990 |
| 2773 | Mark III Oil, Inc. | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2774 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 2775 | Markan Oil Incor | | Oil Operator | Mar 1991 |
| 2776 | Marker Oil Compa | | Oil Operator | Jul 1985 |
| 2777 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Aug 2025 |
| 2778 | Marmac Petroleum | | Oil & Gas Operator | Oct 1994 |
| 2779 | Marmac Petroleum Company | Denver, CO 80222 | Oil Operator | Apr 1998 |
| 2780 | Marmik Oil Compa | | Oil Operator | Jun 1995 |
| 2781 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 2782 | Marrs, Richard L.(Deceased) | Arkansas City, KS 67005 | Oil & Gas Operator | Feb 2013 |
| 2783 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Jun 2025 |
| 2784 | Marshall Lew L O | | Oil Operator | Jun 1994 |
| 2785 | Marshall Oil LLC | Eureka, KS 67045 | Oil Operator | Jun 2025 |
| 2786 | Marshel Inv | | Oil Operator | Oct 1991 |
| 2787 | Martec Petroleum | | Oil Operator | Jan 1984 |
| 2788 | Martin J S Oil O | | Oil & Gas Operator | Apr 1991 |
| 2789 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Jun 2025 |
| 2790 | Martin Oil Produ | | Oil & Gas Operator | Dec 1994 |
| 2791 | Martin Oil Producers, Inc. | Garland, TX 75046 | Oil & Gas Operator | Aug 2013 |
| 2792 | Martin Oil Properties | | Oil Operator | Dec 2009 |
| 2793 | Martin Phillips | | Oil Operator | Dec 1987 |
| 2794 | Martin, Bob | Wann, OK 74083 | Oil & Gas Operator | Sep 2007 |
| 2795 | Martin, Dail D. | Madison, KS 66860 | Oil Operator | Dec 2019 |
| 2796 | Martin, Philip H. | Ellis, KS 67637 | Oil Operator | Apr 2000 |
| 2797 | Martindale Enter | | Oil & Gas Operator | Oct 1996 |
| 2798 | Masek Oil Compan | | Oil Operator | Feb 1984 |
| 2799 | Massey, Gary R. | Eureka, KS 67045 | Oil Operator | Jun 2025 |
| 2800 | Mastel, Francis E. | Rantoul, KS 66079 | Oil Operator | Oct 2009 |