| 2801 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 2802 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Feb 2026 |
| 2803 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Dec 2025 |
| 2804 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 2805 | Maco Incorporate | | Oil Operator | Jun 1984 |
| 2806 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 2807 | Mad Operators LLC | | Oil & Gas Operator | Sep 2025 |
| 2808 | Magnatex Petrole | | Oil Operator | Jun 1994 |
| 2809 | Magnatex Petroleum | | Oil Operator | Apr 1993 |
| 2810 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2026 |
| 2811 | Magnum Exploration Kansas, LLC | Lipan, TX 76462 | Oil Operator | Oct 2016 |
| 2812 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 2813 | Magnusson Karl E | | Oil Operator | Apr 1987 |
| 2814 | Mahoney Drilling | | Gas Operator | Jan 1982 |
| 2815 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 2816 | Mai Operations | | Oil Operator | Dec 1996 |
| 2817 | Major Oil Compan | | Oil Operator | Mar 1988 |
| 2818 | Mak Oil & Gas Co | | Oil Operator | Mar 2009 |
| 2819 | Mako Operating Company, LLC | Andover, KS 67002 | Gas Operator | May 2002 |
| 2820 | Mallonee-Mahoney | | Oil & Gas Operator | Dec 1994 |
| 2821 | Malone Donald J | | Oil Operator | Nov 1993 |
| 2822 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 2823 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 2824 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 2825 | Manns' Atp, Inc. | Potwin, KS 67123 | Oil Operator | Jun 2025 |
| 2826 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 2827 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 2828 | Mapco Prod Compa | | Gas Operator | Dec 1984 |
| 2829 | Maple Leaf Energ | | Oil & Gas Operator | Sep 1989 |
| 2830 | Mapleton Gas Pipeline, Inc. | Mapleton, KS 66754 | Gas Operator | Jun 2011 |
| 2831 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Sep 2025 |
| 2832 | Marathon Oil Co.-Rocky Mountain Region | Cody, WY 82414 | Oil Operator | Dec 1999 |
| 2833 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 2834 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 2835 | Marco Oil Compan | | Oil & Gas Operator | Aug 1992 |
| 2836 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Nov 2025 |
| 2837 | Marco Production | | Oil & Gas Operator | Apr 1986 |
| 2838 | Marden Producing | | Gas Operator | Aug 1990 |
| 2839 | Marden Producing Company | Edmond, OK 73083 | Gas Operator | Sep 2025 |
| 2840 | Marexco | | Oil & Gas Operator | Nov 1994 |
| 2841 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Sep 2025 |
| 2842 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 2843 | Mariah Operating Company, LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2009 |
| 2844 | Marjo Incorporat | | Oil & Gas Operator | Jun 1990 |
| 2845 | Mark III Oil, Inc. | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 2846 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 2847 | Markan Oil Incor | | Oil Operator | Mar 1991 |
| 2848 | Marker Oil Compa | | Oil Operator | Jul 1985 |
| 2849 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 2025 |
| 2850 | Marmac Petroleum | | Oil & Gas Operator | Oct 1994 |
| 2851 | Marmac Petroleum Company | Denver, CO 80222 | Oil Operator | Apr 1998 |
| 2852 | Marmik Oil Compa | | Oil Operator | Jun 1995 |
| 2853 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 2854 | Marrs Richard L | | Gas Operator | Apr 1990 |
| 2855 | Marrs, Richard L.(Deceased) | Arkansas City, KS 67005 | Oil & Gas Operator | Feb 2013 |
| 2856 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Sep 2025 |
| 2857 | Marsh Tom F Inco | | Gas Operator | Jun 1987 |
| 2858 | Marshall Lew L O | | Oil Operator | Jun 1994 |
| 2859 | Marshall Oil LLC | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 2860 | Marshel Inv | | Oil Operator | Oct 1991 |
| 2861 | Martec Petroleum | | Oil Operator | Jan 1984 |
| 2862 | Martin J S Oil O | | Oil & Gas Operator | Apr 1991 |
| 2863 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Sep 2025 |
| 2864 | Martin Oil Produ | | Oil & Gas Operator | Dec 1994 |
| 2865 | Martin Oil Producers, Inc. | Garland, TX 75046 | Oil & Gas Operator | Aug 2013 |
| 2866 | Martin Oil Properties | | Oil Operator | Dec 2009 |
| 2867 | Martin Phillips | | Oil Operator | Dec 1987 |
| 2868 | Martin, Bob | Wann, OK 74083 | Oil & Gas Operator | Sep 2007 |
| 2869 | Martin, Dail D. | Madison, KS 66860 | Oil Operator | Dec 2019 |
| 2870 | Martin, Philip H. | Ellis, KS 67637 | Oil Operator | Apr 2000 |
| 2871 | Martindale Enter | | Oil & Gas Operator | Oct 1996 |
| 2872 | Masek Oil Compan | | Oil Operator | Feb 1984 |
| 2873 | Massey, Gary R. | Eureka, KS 67045 | Oil Operator | Sep 2025 |
| 2874 | Mastel, Francis E. | Rantoul, KS 66079 | Oil Operator | Oct 2009 |
| 2875 | Matador Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2001 |
| 2876 | Matador, Inc. | Sedan, KS 67361 | Oil Operator | Aug 2025 |
| 2877 | Matlock, Randall K. | Topeka, KS 66607 | Oil Operator | May 2000 |
| 2878 | Mattingly, Inc. | Wichita, KS 67226 | Gas Operator | Jun 2011 |
| 2879 | Matuk, Edward C. | Neodesha, KS 66757 | Oil Operator | Aug 1989 |
| 2880 | Mauslein, Lenore | Wellsville, KS 66092 | Oil Operator | Oct 2001 |
| 2881 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Feb 2026 |
| 2882 | Max Oil Company | Blackwell, OK 74631 | Oil & Gas Operator | Apr 2024 |
| 2883 | Max Oil LLC | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 2884 | Max Papay LLC | Meade, KS 67864 | Oil & Gas Operator | Jun 2018 |
| 2885 | Maxam Incorporat | | Oil Operator | Jun 1991 |
| 2886 | Maxcrude, LLC | Winfield, KS 67156 | Oil & Gas Operator | Sep 2025 |
| 2887 | Maxie D, Inc. | Laguna Niguel, CA 92677 | Gas Operator | Feb 1998 |
| 2888 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 2889 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 2890 | Mayhew Properties | | Gas Operator | Sep 2025 |
| 2891 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 2892 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 2893 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Sep 2025 |
| 2894 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 2895 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 2896 | McAam Oil Company, Inc. | Wichita, KS 67206 | Gas Operator | Dec 2001 |
| 2897 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 2898 | McCann Drilling | | Oil & Gas Operator | Oct 1996 |
| 2899 | McCann Drilling, Inc. | Bartlesville, OK 74003 | Oil Operator | Mar 2011 |
| 2900 | McCann Mark Wind | | Oil & Gas Operator | Dec 1994 |