| 2801 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 2802 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 2803 | Mayhew Properties | | Gas Operator | Jan 2025 |
| 2804 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 2805 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 2806 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Jan 2025 |
| 2807 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 2808 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 2809 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 2810 | McCann Drilling | | Oil & Gas Operator | Oct 1996 |
| 2811 | McCann Drilling, Inc. | Bartlesville, OK 74003 | Oil Operator | Mar 2011 |
| 2812 | McCann Mark Wind | | Oil & Gas Operator | Dec 1994 |
| 2813 | McCann Petroleum, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Jul 1998 |
| 2814 | McCarthy Oil Co. | | Oil Operator | Dec 1998 |
| 2815 | McCarthy Oil Com | | Oil Operator | Jun 1994 |
| 2816 | McCarthy Tim W - | | Oil Operator | Mar 1994 |
| 2817 | McCarty Francis | | Oil Operator | Sep 1993 |
| 2818 | McClelland Oil - | | Oil Operator | Dec 2009 |
| 2819 | McClelland, C.R. Operations, Inc. | Madison, KS 66860 | Oil Operator | Aug 1998 |
| 2820 | McClure M C Oil | | Oil Operator | Jul 1984 |
| 2821 | McCluskey Willia | | Oil & Gas Operator | Dec 1990 |
| 2822 | McConnell Oil Properties | | Oil Operator | Jan 2025 |
| 2823 | McCorgary Operations | | Oil & Gas Operator | Jan 2025 |
| 2824 | McCorkle, Frank R. & Kathleen A. | Sedan, KS 67361 | Oil Operator | Oct 2009 |
| 2825 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 2826 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Apr 2025 |
| 2827 | McCoy Production | El Dorado, KS 67042 | Oil Operator | Dec 2019 |
| 2828 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Jan 2025 |
| 2829 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 2830 | McFadden Oil Co. | | Oil Operator | Jan 2025 |
| 2831 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Feb 2025 |
| 2832 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 2833 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 2834 | McGinnis Oil | | Oil & Gas Operator | Dec 2002 |
| 2835 | McGown Drilling | | Oil Operator | Apr 1993 |
| 2836 | McGown Drilling, Inc. | Mound City, KS 66056 | Oil Operator | Jan 2025 |
| 2837 | McGrath, Rollie | Lake City, KS 67071 | Gas Operator | Jan 2025 |
| 2838 | McIlvain Oil LLC | Madison, KS 66860 | Oil Operator | Dec 2017 |
| 2839 | McKelvy A D Oil | | Gas Operator | Feb 1995 |
| 2840 | McLester Oil & G | | Oil & Gas Operator | Jun 1992 |
| 2841 | McLouth Operating Company, Inc. | Kansas City, MO 64106 | Oil Operator | Aug 1999 |
| 2842 | McMillan, David | FT. Worth, TX 76107 | Oil Operator | Aug 2001 |
| 2843 | McMillan, L.L.C. | Sedan, KS 67361 | Oil Operator | Dec 2019 |
| 2844 | McMillen, Clay Eugene (Gene) | Chanute, KS 66720 | Oil Operator | Aug 1997 |
| 2845 | McMullin Well Se | | Oil & Gas Operator | Sep 1995 |
| 2846 | McMullin, Douglas | Wellsville, KS 66092 | Oil Operator | Nov 2024 |
| 2847 | McNeish Oil Oper | | Oil & Gas Operator | Feb 1991 |
| 2848 | McNeish Oil Operations | | Oil Operator | Nov 2019 |
| 2849 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 2850 | McNown, Carl H. | Moline, KS 67353 | Oil Operator | Jun 2021 |
| 2851 | McO Resources In | | Oil & Gas Operator | Apr 1987 |
| 2852 | McPherson Drilling | | Oil Operator | Jun 2015 |
| 2853 | McPherson Drilling Co. | | Oil Operator | Jan 1998 |
| 2854 | McQueeney, John J. | Osawatomie, KS 66064 | Oil Operator | Jan 1985 |
| 2855 | McRae, William R. | Scottsdale, AZ 85254 | Oil Operator | Aug 1995 |
| 2856 | Mdopps, LLC | Wichita, KS 67203 | Oil Operator | Apr 2023 |
| 2857 | Mears, John C. | Chanute, KS 66720 | Oil Operator | Dec 2017 |
| 2858 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 2859 | Medlen, Dean S. | Rantoul, KS 66079 | Oil Operator | Aug 1993 |
| 2860 | Mega Petroleum C | | Oil Operator | Jun 1990 |
| 2861 | Mega Petroleum Corporation | Dallas, TX 75202 | Gas Operator | Feb 1998 |
| 2862 | Meier Joe Oil Op | | Oil Operator | Jul 1983 |
| 2863 | Melland Drilling | | Oil Operator | Nov 1992 |
| 2864 | Melrose Group In | | Oil Operator | Feb 1994 |
| 2865 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Jan 2025 |
| 2866 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 2867 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Jan 2025 |
| 2868 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 2869 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 2870 | Merica Oil Operating Company LLC | Frisco, TX 75034 | Oil Operator | Dec 2024 |
| 2871 | Meridian Energy Inc. | | Oil Operator | Jan 2025 |
| 2872 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 2873 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 2874 | Merrick Oil & Gas | | Oil & Gas Operator | Sep 2024 |
| 2875 | Merrico Resource | | Oil Operator | Dec 1996 |
| 2876 | Merritt Oil Comp | | Oil Operator | Jan 1990 |
| 2877 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 2878 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 2879 | Mesa Petroleum C | | Oil & Gas Operator | Dec 1986 |
| 2880 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Jan 2025 |
| 2881 | Messman Corporation | Wichita, KS 67208 | Oil & Gas Operator | Jan 2025 |
| 2882 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 2883 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 2884 | Metro Energy, Inc. | Gladstone, MO 64118 | Oil Operator | May 1997 |
| 2885 | Metro Oil Compan | | Oil Operator | Jan 1991 |
| 2886 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 2887 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 2888 | Meyer, Norbert | Conway Springs, KS 67031 | Oil Operator | Aug 1994 |
| 2889 | Meyer, Theodore J. | Conway Springs, KS 67031 | Oil Operator | Jan 2025 |
| 2890 | Mica Energy Corp. | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 2891 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | Jan 2025 |
| 2892 | Michael D. Weilert Oil Company | | Oil Operator | Jan 2025 |
| 2893 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 2894 | Mico Oil & Gas | Paola, KS 66071 | Oil Operator | Aug 1995 |
| 2895 | Micro Oil, LLC | Casa Grande, AZ 85193 | Oil Operator | Nov 2024 |
| 2896 | Mid America Ener | | Oil Operator | Nov 1993 |
| 2897 | Mid Con Energy Corporation | Fort Scott, KS 66701 | Oil Operator | Dec 2009 |
| 2898 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 2025 |
| 2899 | Mid Gulf Incorpo | | Oil & Gas Operator | Nov 1993 |
| 2900 | Mid Kansas Explo | | Oil Operator | Apr 1994 |