| 2901 | McCann Petroleum, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Jul 1998 |
| 2902 | McCarthy Oil Co. | | Oil Operator | Dec 1998 |
| 2903 | McCarthy Oil Com | | Oil Operator | Jun 1994 |
| 2904 | McCarthy Tim W - | | Oil Operator | Mar 1994 |
| 2905 | McCarty Francis | | Oil Operator | Sep 1993 |
| 2906 | McClelland Oil - | | Oil Operator | Dec 2009 |
| 2907 | McClelland, C.R. Operations, Inc. | Madison, KS 66860 | Oil Operator | Aug 1998 |
| 2908 | McClure M C Oil | | Oil Operator | Jul 1984 |
| 2909 | McCluskey Willia | | Oil & Gas Operator | Dec 1990 |
| 2910 | McConnell Oil Properties | | Oil Operator | Sep 2025 |
| 2911 | McCorgary Operations | | Oil & Gas Operator | Sep 2025 |
| 2912 | McCorkle, Frank R. & Kathleen A. | Sedan, KS 67361 | Oil Operator | Oct 2009 |
| 2913 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 2914 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Dec 2025 |
| 2915 | McCoy Production | El Dorado, KS 67042 | Oil Operator | Dec 2019 |
| 2916 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Sep 2025 |
| 2917 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 2918 | McFadden Oil Co. | | Oil Operator | Sep 2025 |
| 2919 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 2920 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 2921 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 2922 | McGinnis Oil | | Oil & Gas Operator | Dec 2002 |
| 2923 | McGown Drilling | | Oil Operator | Apr 1993 |
| 2924 | McGown Drilling, Inc. | Mound City, KS 66056 | Oil Operator | Sep 2025 |
| 2925 | McGrath, Rollie | Lake City, KS 67071 | Gas Operator | Aug 2025 |
| 2926 | McIlvain Oil LLC | Madison, KS 66860 | Oil Operator | Dec 2017 |
| 2927 | McKelvy A D Oil | | Gas Operator | Feb 1995 |
| 2928 | McLester Oil & G | | Oil & Gas Operator | Jun 1992 |
| 2929 | McLouth Operating Company, Inc. | Kansas City, MO 64106 | Oil Operator | Aug 1999 |
| 2930 | McMillan, David | FT. Worth, TX 76107 | Oil Operator | Aug 2001 |
| 2931 | McMillan, L.L.C. | Sedan, KS 67361 | Oil Operator | Dec 2019 |
| 2932 | McMillen, Clay Eugene (Gene) | Chanute, KS 66720 | Oil Operator | Aug 1997 |
| 2933 | McMullin Well Se | | Oil & Gas Operator | Sep 1995 |
| 2934 | McMullin, Douglas | Wellsville, KS 66092 | Oil Operator | Sep 2025 |
| 2935 | McNeish Oil Oper | | Oil & Gas Operator | Feb 1991 |
| 2936 | McNeish Oil Operations | | Oil Operator | Nov 2019 |
| 2937 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 2938 | McNown, Carl H. | Moline, KS 67353 | Oil Operator | Jun 2021 |
| 2939 | McO Resources In | | Oil & Gas Operator | Apr 1987 |
| 2940 | McPherson Drilling | | Oil Operator | Jun 2015 |
| 2941 | McPherson Drilling Co. | | Oil Operator | Jan 1998 |
| 2942 | McQueeney, John J. | Osawatomie, KS 66064 | Oil Operator | Jan 1985 |
| 2943 | McRae, William R. | Scottsdale, AZ 85254 | Oil Operator | Aug 1995 |
| 2944 | Mdopps, LLC | Wichita, KS 67203 | Oil Operator | Apr 2023 |
| 2945 | Mears, John C. | Chanute, KS 66720 | Oil Operator | Dec 2017 |
| 2946 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 2947 | Medlen, Dean S. | Rantoul, KS 66079 | Oil Operator | Aug 1993 |
| 2948 | Mega Petroleum C | | Oil Operator | Jun 1990 |
| 2949 | Mega Petroleum Corporation | Dallas, TX 75202 | Gas Operator | Feb 1998 |
| 2950 | Meier Joe Oil Op | | Oil Operator | Jul 1983 |
| 2951 | Melland Drilling | | Oil Operator | Nov 1992 |
| 2952 | Melrose Group In | | Oil Operator | Feb 1994 |
| 2953 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Sep 2025 |
| 2954 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 2955 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Sep 2025 |
| 2956 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 2957 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 2958 | Meridian Energy Inc. | | Oil Operator | Sep 2025 |
| 2959 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 2960 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Sep 2025 |
| 2961 | Merrick Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 2962 | Merrico Resource | | Oil Operator | Dec 1996 |
| 2963 | Merritt Oil Comp | | Oil Operator | Jan 1990 |
| 2964 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 2965 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 2966 | Mesa Petroleum C | | Oil & Gas Operator | Dec 1986 |
| 2967 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Sep 2025 |
| 2968 | Messman Corporation | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 2969 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 2970 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 2971 | Metro Energy, Inc. | Gladstone, MO 64118 | Oil Operator | May 1997 |
| 2972 | Metro Oil Compan | | Oil Operator | Jan 1991 |
| 2973 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Feb 2026 |
| 2974 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 2975 | Meyer, Norbert | Conway Springs, KS 67031 | Oil Operator | Aug 1994 |
| 2976 | Meyer, Theodore J. | Conway Springs, KS 67031 | Oil Operator | Sep 2025 |
| 2977 | Mica Energy Corp | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 2978 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | Sep 2025 |
| 2979 | Michael D. Weilert Oil Company | | Oil Operator | Sep 2025 |
| 2980 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 2981 | Mico Oil & Gas | Paola, KS 66071 | Oil Operator | Aug 1995 |
| 2982 | Micro Oil, LLC | Casa Grande, AZ 85193 | Oil Operator | Nov 2024 |
| 2983 | Mid America Ener | | Oil Operator | Nov 1993 |
| 2984 | Mid Con Energy Corporation | Fort Scott, KS 66701 | Oil Operator | Dec 2009 |
| 2985 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Feb 2026 |
| 2986 | Mid Gulf Incorpo | | Oil & Gas Operator | Nov 1993 |
| 2987 | Mid Kansas Explo | | Oil Operator | Apr 1994 |
| 2988 | Mid Kansas Gas Gathering | | Gas Operator | Sep 2025 |
| 2989 | Mid States Energ | | Oil Operator | Aug 1985 |
| 2990 | Mid States Gener | | Oil Operator | Apr 1988 |
| 2991 | Mid Western Oil | | Oil Operator | Oct 1989 |
| 2992 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 2993 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 2994 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 2995 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 2996 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |
| 2997 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 2998 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 2999 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 3000 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |