| 2901 | Mid Kansas Gas Gathering | | Gas Operator | Jan 2025 |
| 2902 | Mid States Energ | | Oil Operator | Aug 1985 |
| 2903 | Mid States Gener | | Oil Operator | Apr 1988 |
| 2904 | Mid Western Oil | | Oil Operator | Oct 1989 |
| 2905 | Mid-America Energy Company, Inc. | Lebanon, MO 65536 | Oil Operator | Jul 2003 |
| 2906 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 2907 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 2908 | Mid-Continent En | | Oil & Gas Operator | Nov 1995 |
| 2909 | Mid-Continent Energy Corp. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2025 |
| 2910 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 2911 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 2912 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 2913 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 2914 | Midco Exploration, Inc. | Westmont, IL 60559 | Oil & Gas Operator | Jan 2025 |
| 2915 | Midcontinent Acquisition Properties, Inc. | Oklahoma City, OK 73102 | Gas Operator | Jan 2000 |
| 2916 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 2917 | Midlands Gas Cor | | Gas Operator | Dec 1996 |
| 2918 | Midnight Energy Operating LLC | Drumright, OK 74030 | Oil Operator | Feb 2025 |
| 2919 | Midnight Well Se | | Oil Operator | Sep 1994 |
| 2920 | Midstates Energy Operating, LLC | FT Myers, FL 33912 | Oil Operator | Nov 2024 |
| 2921 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 2922 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 2923 | Midwest Oil, LLC | Destin, FL 32541 | Oil Operator | Aug 2024 |
| 2924 | Midwest Turf | El Dorado, KS 67042 | Oil Operator | Jun 1998 |
| 2925 | Midwestern Exploration Co. | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 2926 | Midwestern Oil C | | Oil & Gas Operator | May 1995 |
| 2927 | Midwestern Suppl | | Oil Operator | Oct 1986 |
| 2928 | Migwis | Great Bend, KS 67530 | Oil Operator | Mar 1988 |
| 2929 | Mike Blaes & Peggy Blaes, A General Partnership | Cherryvale, KS 67335 | Oil Operator | Dec 2023 |
| 2930 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Jan 2025 |
| 2931 | Mikol Oil LLC | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 2932 | Milburn, Harold J. | Hutchinson, KS 67502 | Oil & Gas Operator | Sep 2003 |
| 2933 | Millennium Oil & Gas Inc | Dexter, KS 67038 | Oil & Gas Operator | Dec 2024 |
| 2934 | Miller Bros Oil Company, Inc. | Burlington, KS 66839 | Oil Operator | Dec 2009 |
| 2935 | Miller Energy, LLC | Garnett, KS 66032 | Oil Operator | Nov 2019 |
| 2936 | Miller I O Incor | | Oil & Gas Operator | Apr 1991 |
| 2937 | Miller Oil Company, LLC | Chanute, KS 66720 | Oil Operator | Jul 2024 |
| 2938 | Miller, Bobby Elzo | Sedan, KS 67361 | Oil Operator | Dec 2009 |
| 2939 | Miller, Everett E. | Sedan, KS 67361 | Oil & Gas Operator | Sep 1986 |
| 2940 | Miller, James R. | Herrington, KS 67449 | Oil Operator | Feb 2025 |
| 2941 | Miller, Myron R. | Haven, KS 67543 | Oil Operator | Oct 2017 |
| 2942 | Miller, Ralph D. & Faye C. | Cherryvale, KS 67335 | Oil Operator | Apr 2003 |
| 2943 | Miller, Robert A. | Sedan, KS 67361 | Oil Operator | Aug 2022 |
| 2944 | Miller-Becker Enterprises, LLC | Russell, KS 67665 | Oil Operator | Nov 2024 |
| 2945 | Mills, Norman | Lake City, KS 67071 | Oil Operator | Dec 1995 |
| 2946 | Mills, Ralph A. | Louisburg, KS 66053 | Oil Operator | May 1998 |
| 2947 | Minatome Corpora | | Oil & Gas Operator | Sep 1987 |
| 2948 | Minner Oil Field Service | | Oil Operator | Jul 2008 |
| 2949 | Mishler Oil | | Oil Operator | May 1989 |
| 2950 | Missouri River R | | Gas Operator | Jun 1993 |
| 2951 | Mitchell Energy | | Oil & Gas Operator | Dec 1996 |
| 2952 | Mitchell Wyatt B | | Oil Operator | Aug 1993 |
| 2953 | Miura Petroleum | | Oil Operator | Dec 1992 |
| 2954 | Miura Petroleum, Inc. | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 2955 | Miway Operations | Russell, KS 67665 | Oil Operator | Aug 1994 |
| 2956 | MJ Energy, LLC | Denver, CO 80206 | Oil Operator | Jan 2025 |
| 2957 | MJ Oil Company | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 2958 | MJT Oil | | Oil Operator | Jan 2025 |
| 2959 | MKJ Oil Co LLC | Harper, KS 67058 | Oil & Gas Operator | Jan 2025 |
| 2960 | MLT Energy, LLC | Derby, KS 67037 | Oil Operator | Feb 2025 |
| 2961 | Mo-Kan Oil Group | St. Louis, MO 63131 | Oil Operator | Sep 2001 |
| 2962 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 2963 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 2964 | Moff Oil Company | Pratt, KS 67124 | Gas Operator | Apr 1988 |
| 2965 | Mohawk Petroleum | | Oil & Gas Operator | Jan 1995 |
| 2966 | Mohr, Steve | Maize, KS 67101 | Oil Operator | Aug 2022 |
| 2967 | Molitor Oil, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jan 2025 |
| 2968 | Molz Oil Company | Kiowa, KS 67070 | Oil & Gas Operator | Mar 2025 |
| 2969 | Monarch Energy C | | Oil Operator | Nov 1987 |
| 2970 | Monarch Energy LLC | Paola, KS 66071 | Oil Operator | Jan 2025 |
| 2971 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 2972 | Monfort, Roy C. | Iola, KS 66749 | Oil & Gas Operator | Sep 1989 |
| 2973 | Monsanto Oil Com | | Oil Operator | Nov 1996 |
| 2974 | Montgomery Count | | Oil Operator | Dec 1992 |
| 2975 | Montgomery Production & Operating LLC | Herington, KS 67449 | Oil & Gas Operator | Jan 2025 |
| 2976 | Monument Resources, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2012 |
| 2977 | Moore, Brent L. | McPherson, KS 67460 | Oil Operator | Dec 1996 |
| 2978 | Moore, Clay (Deceased) | Dallas, TX 75218 | Oil Operator | Sep 2001 |
| 2979 | Moore, Douglas L. | Gridley, KS 66852 | Oil Operator | Jan 2019 |
| 2980 | Mor-Meg Incorpor | | Oil Operator | Dec 1996 |
| 2981 | Moran Oil Enterprises, LLC | Seminole, OK 74818 | Oil & Gas Operator | Dec 2019 |
| 2982 | Morgenstern Oil Operations LLC | Ellinwood, KS 67526 | Oil Operator | Jan 2025 |
| 2983 | Morris & Morris | | Oil Operator | Sep 1995 |
| 2984 | Morris Everett E | | Oil & Gas Operator | Feb 1991 |
| 2985 | Morris Oil Operations | | Oil Operator | Jan 2025 |
| 2986 | Morris Richard B | | Oil Operator | Dec 1996 |
| 2987 | Morrison, Mark L. | Yates Center, KS 66783 | Oil Operator | Dec 2024 |
| 2988 | Morrison-Dixon O | | Oil Operator | Oct 1993 |
| 2989 | Morrow, Joe | Farmington, NM 87401 | Oil Operator | Jan 1993 |
| 2990 | Morsey Oil & Gas | | Oil & Gas Operator | Mar 1995 |
| 2991 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 2992 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 2993 | Moylan, Thomas F. | Lacygne, KS 66040 | Oil & Gas Operator | Dec 1993 |
| 2994 | MSG Resources Inc. | Iola, KS 66749 | Oil Operator | Jan 2025 |
| 2995 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Jan 2025 |
| 2996 | Muegge, Clay A. | Lamont, OK 74643 | Oil & Gas Operator | Mar 2025 |
| 2997 | Mueller Oil | | Oil Operator | Dec 2024 |
| 2998 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 2999 | Multiplex Resources, Inc. | Baytown, TX 77521 | Oil Operator | Dec 2009 |
| 3000 | Murchison Oil & | | Oil Operator | Mar 1988 |