| 801 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 802 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 803 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Jan 2025 |
| 804 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Mar 2025 |
| 805 | Meteor Developments Inc | Denver, CO BAD ADDR | Oil & Gas Operator | Dec 1995 |
| 806 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 807 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 808 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | Mar 2025 |
| 809 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 810 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 811 | Midland Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 812 | Milford Oil Co | Tatum, NM 88267 | Oil & Gas Operator | Feb 1995 |
| 813 | Miller Oil & Gas Assets III, LLC | Englewood, CO 80155 | Oil & Gas Operator | May 2012 |
| 814 | Miltex Oil Company | Boerne, TX 78006 | Oil & Gas Operator | Mar 2025 |
| 815 | Minel Inc | Richardson, TX 75080 | Oil & Gas Operator | Aug 2024 |
| 816 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2025 |
| 817 | Mirage Energy Inc | Eunice, NM 88231 | Oil & Gas Operator | Apr 2011 |
| 818 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 819 | Mka Oil Properties | Midland, TX 79701 | Oil & Gas Operator | Sep 1997 |
| 820 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Mar 2025 |
| 821 | Mobil Producing Texas & New Mexico | Denver City, TX 79323 | Oil & Gas Operator | Jun 2005 |
| 822 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 823 | Momentum Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 824 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 825 | Morexco Inc | Midland, TX 79710 | Oil & Gas Operator | Mar 2019 |
| 826 | Morgan Operating, Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Oct 2024 |
| 827 | Moriah Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 828 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 829 | Morningstar Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2022 |
| 830 | Morris A Richardson Dba Fair VIew Production | Muldrow, OK 74948 | Oil Operator | Sep 2006 |
| 831 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Mar 2025 |
| 832 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |
| 833 | Mr NM Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 834 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 835 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Jan 2025 |
| 836 | Murphy Operating Corp | Roswell, NM 88202 | Oil & Gas Operator | Apr 1998 |
| 837 | Mustang Resources LLC | Houston, TX 77256 | Oil & Gas Operator | Jan 2025 |
| 838 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 839 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Mar 2025 |
| 840 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | Mar 2025 |
| 841 | N Dale Nichols | Midland, TX 79703 | Oil & Gas Operator | Jun 2004 |
| 842 | Nacogdoches Oil & Gas Inc | Nacogdoches, TX 75963 | Oil & Gas Operator | Mar 2025 |
| 843 | Nadel And Gussman Heyco, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2014 |
| 844 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 845 | Nadel And Gussman Rockies, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2012 |
| 846 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2025 |
| 847 | Nancy Wilcox E Qualls | Farmington, NM 87410 | Gas Operator | May 2017 |
| 848 | Nassau Resources Inc | Denver, CO 80222 | Oil & Gas Operator | Mar 2000 |
| 849 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 850 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 851 | Navajo Nation Oil & Gas Co | Window Rock, AZ 86511 | Oil & Gas Operator | Oct 2012 |
| 852 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 853 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 854 | Nerdlihc Company Inc. | Long Beach, CA 90815 | Oil & Gas Operator | Nov 2006 |
| 855 | New Horizon Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jun 2006 |
| 856 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 857 | New Tex Oil Co | Hobbs, NM 88240 | Oil & Gas Operator | May 2016 |
| 858 | Newfield Exploration Mid-Continent Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2011 |
| 859 | NGX Company | Roswell, NM 88202 | Oil & Gas Operator | Jul 2008 |
| 860 | Nitro Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 861 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 862 | NMR Energy LLC | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 863 | Nnogc Exploration & Production, LLC | Window Rock, AZ 86515 | Oil & Gas Operator | Jan 2025 |
| 864 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 865 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 866 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Mar 2025 |
| 867 | Norman L & Loretta E Gilbreath | Aztec, NM 87401 | Gas Operator | Aug 2018 |
| 868 | Norman L Gilbreath | Aztec, NM 87401 | Gas Operator | Aug 2018 |
| 869 | North Fork Operating LP | Mustang, OK 73064 | Oil & Gas Operator | Mar 2025 |
| 870 | North Lea Energy Co., LLC | Crossroads, NM 88114 | Oil & Gas Operator | Nov 2024 |
| 871 | Northern Pacific Oil And Gas Incorporated | Houston, TX 77024 | Oil & Gas Operator | Dec 2022 |
| 872 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 873 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 874 | Northstar Oil & Gas | Sewickley, PA 151430168 | Oil & Gas Operator | May 2005 |
| 875 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 876 | Northwest Pipeline Company | Salt Lake City, UT 841580900 | Oil & Gas Operator | Feb 1995 |
| 877 | Norwood Oil Corp | Malakoff, TX 75148 | Oil & Gas Operator | Oct 1995 |
| 878 | Novo Oil & Gas Northern Delaware, LLC | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 879 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Jan 2025 |
| 880 | Nuevida Resources LLC | Dallas, TX 75235 | Gas Operator | Jan 2025 |
| 881 | Nuroc Energy Incorporated | Andrews, TX 79714 | Oil Operator | Jan 2025 |
| 882 | O H Berry | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 883 | O'Neil Properties LTD | Midland, TX 79702 | Oil & Gas Operator | Jun 2015 |
| 884 | O. H. B. Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Sep 2019 |
| 885 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 886 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 887 | Ogs Operating Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2008 |
| 888 | Ogx Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 889 | Oil & Gas Operations | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 890 | Ok Operating Co | Midland, TX 79702 | Oil & Gas Operator | Aug 1999 |
| 891 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 892 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 893 | Oleum Energy LLC | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2024 |
| 894 | Olsen Energy Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2025 |
| 895 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 896 | Oneenergy Partners Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | Nov 2018 |
| 897 | Onshore Royalties LLC | Houston, TX 77269 | Oil & Gas Operator | Jan 2025 |
| 898 | Opal Operating Company LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 899 | Orbit Enterprises, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Mar 2015 |
| 900 | Orbit Petroleum, Inc. | Irving, TX 75038 | Oil & Gas Operator | Sep 2010 |