| 3801 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 3802 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 3803 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 3804 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Sep 2025 |
| 3805 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 3806 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 3807 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Aug 2025 |
| 3808 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 3809 | Mer-Bar Exploration Co Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 1992 |
| 3810 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 3811 | Mercer Oil Co | Stratford, OK 74872-7426 | Oil & Gas Operator | Aug 2025 |
| 3812 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 3813 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 3814 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 3815 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 3816 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 3817 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 3818 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 3819 | Mermac Operating Company Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 3820 | Meroda Resources LLC | Mustang, OK 73064-9408 | Oil & Gas Operator | Apr 2000 |
| 3821 | Merrick Ward S Inc | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2001 |
| 3822 | Mervine Oil Company Inc | Blackwell, OK 74631-0514 | Oil Operator | Jan 2013 |
| 3823 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2025 |
| 3824 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 3825 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 3826 | Metro Energy LTD | Scottsdale, AZ 85254 | Oil Operator | Aug 2000 |
| 3827 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 3828 | Metzner, Norma J. Estate | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1998 |
| 3829 | Mewbourne Marketing, Inc. | | Oil & Gas Operator | Mar 2013 |
| 3830 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 3831 | Meyer Oil Co., Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Aug 2025 |
| 3832 | Meyerhoff & Cox Inc | Tulsa, OK 74135-7830 | Oil Operator | Aug 1993 |
| 3833 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Jul 2025 |
| 3834 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Aug 2025 |
| 3835 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 3836 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Aug 2025 |
| 3837 | Michaels, Bobby W | | Oil Operator | Nov 1998 |
| 3838 | Michigan Oil Company | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 3839 | Mickalson Operating Company | Cleveland, OK 74020 | Oil & Gas Operator | Sep 2025 |
| 3840 | Mid Center Oil Company | | Oil & Gas Operator | Mar 2014 |
| 3841 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 3842 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 3843 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 3844 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2025 |
| 3845 | Mid-Continent Petroleum Management Inc | Cement, OK 73017 | Oil & Gas Operator | Aug 2025 |
| 3846 | Mid-Way Environmental Services Inc | Stroud, OK 74079 | Oil Operator | Apr 2025 |
| 3847 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 3848 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 3849 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 3850 | Midland TMG Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 3851 | Midnight Energy Operating LLC | Drumright, OK 74030 | Oil Operator | Aug 2025 |
| 3852 | Midnight Hour LLC | Enid, OK 73702 | Oil & Gas Operator | Apr 2020 |
| 3853 | Midstate Oil & Gas Company | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2025 |
| 3854 | Midstates Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2000 |
| 3855 | Midway Leasing Inc | Haskell, OK 74436-2406 | Oil & Gas Operator | Jan 2024 |
| 3856 | Midway Operating Company, L.L.C. | Woodward, OK 73802 | Oil & Gas Operator | Dec 2025 |
| 3857 | Midwest Energy Corporation | Tulsa, OK 74105-6083 | Oil & Gas Operator | Aug 2016 |
| 3858 | Midwest Enterprises Inc | Cashion, OK 73016-9626 | Oil & Gas Operator | Apr 2025 |
| 3859 | Midwest Eor Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | May 2013 |
| 3860 | Midwest Oil Company | Beggs, OK 74421-2976 | Oil Operator | Apr 2015 |
| 3861 | Midwest Operating Company Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | Nov 1999 |
| 3862 | Midwest Pipe & Supply Company | Oklahoma City, OK 73154-0245 | Oil & Gas Operator | Dec 2008 |
| 3863 | Midwestern Exploration Company | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 3864 | Migwis Operating LLC | Cushing, OK 74023-4854 | Oil & Gas Operator | Oct 2020 |
| 3865 | Mija LLC | Oklahoma City, OK 73151 | Oil & Gas Operator | Sep 2025 |
| 3866 | Mikal R Brown Oil LLC | Cleveland, OK 74020-6475 | Oil Operator | Dec 2022 |
| 3867 | Mikarden Energy Inc | Sapulpa, OK 74066 | Oil Operator | Aug 2025 |
| 3868 | Mikco Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2001 |
| 3869 | Milagro Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Aug 2018 |
| 3870 | Milburn R Kenneth | Ardmore, OK 73402-1118 | Oil & Gas Operator | Sep 2014 |
| 3871 | Milburn Robert G | Countyline, OK 73025 | Oil Operator | Apr 2020 |
| 3872 | Mild Oil Company | Duncan, OK 73533-9532 | Oil Operator | Mar 2000 |
| 3873 | Miller & Stanley Oper Co | Amarillo, TX 79114 | Oil & Gas Operator | Sep 2014 |
| 3874 | Miller B Investments | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2007 |
| 3875 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 3876 | Miller Joe B | Lawton, OK 73507 | Oil Operator | Jul 2025 |
| 3877 | Miller John Production | Bristow, OK 74010-2455 | Oil & Gas Operator | Jul 2016 |
| 3878 | Miller Oil & Gas Co | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2017 |
| 3879 | Miller Petroleum Company | Yukon, OK 73099-0452 | Oil & Gas Operator | Aug 2009 |
| 3880 | Miller William D | Sapulpa, OK 74066-1061 | Oil Operator | Oct 2010 |
| 3881 | Miller, James R | Herrington, KS 67449 | Oil Operator | Aug 2025 |
| 3882 | Miller-McGee Operating Inc | Stroud, OK 74079 | Oil & Gas Operator | Sep 2025 |
| 3883 | Milmac Operating Company | Lubbock, TX 79408-2976 | Oil & Gas Operator | Sep 2004 |
| 3884 | Milne Lewis Joel | Allen, OK 74825 | Oil & Gas Operator | Mar 2015 |
| 3885 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 3886 | Miner Rick Oil Inc | Drumright, OK 74030-0373 | Oil & Gas Operator | Apr 2022 |
| 3887 | Minerva Oil Company | Tulsa, OK 74152-0858 | Oil & Gas Operator | Mar 2015 |
| 3888 | Minihan Oil And Gas Company | Seminole, OK 74868-9790 | Oil & Gas Operator | Sep 2014 |
| 3889 | Minihan Production Co | Seminole, OK 74868 | Oil & Gas Operator | Jan 1997 |
| 3890 | Mink Oil Company | | Oil Operator | Nov 2003 |
| 3891 | Mink Richard | Cement, OK 73017 | Oil & Gas Operator | Aug 2025 |
| 3892 | Minor Jr W T | Wichita Falls, TX 76307 | Oil Operator | Nov 1998 |
| 3893 | Minor Mark | FT Worth, TX 76116-1003 | Oil Operator | Nov 2015 |
| 3894 | Minuja Oil And Gas LLC | Corpus Christi, TX 78401 | Oil & Gas Operator | Sep 1996 |
| 3895 | Miracle Production Inc | Yukon, OK 73085-0680 | Oil & Gas Operator | Jun 2007 |
| 3896 | Mission Leasing LTD | Tulsa, OK 74136 | Oil Operator | Dec 2000 |
| 3897 | Mission Oil & Gas | Pawhuska, OK 74056 | Oil Operator | May 2013 |
| 3898 | Mitchell Cecil D | Haskell, OK 74436-7667 | Oil & Gas Operator | Apr 2020 |
| 3899 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 3900 | Mitchell Martha | Henryetta, OK 74437-0488 | Oil & Gas Operator | Apr 2011 |