| 17901 | Machii-Ross Petroleum Co | | Oil & Gas Operator | Apr 2014 |
| 17902 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 2025 |
| 17903 | Macina, P.T. | Shamrock, TX 79079 | Gas Operator | May 2025 |
| 17904 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Mar 2025 |
| 17905 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 17906 | Mack Energy Corporation | Artesia, NM 88211 | Oil & Gas Operator | Feb 2025 |
| 17907 | Mack Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Nov 2000 |
| 17908 | Mack Oil Corp | | Oil & Gas Operator | Nov 1998 |
| 17909 | Mack Oil Corp And Delta Oil Co Inc Great Lakes Nia | | Oil & Gas Operator | Feb 1986 |
| 17910 | Mack Oil Corp And Neyer Oil Inc | | Oil & Gas Operator | May 1988 |
| 17911 | Mackellar Inc | Oklahoma City, OK 73116-7101 | Oil & Gas Operator | Mar 2025 |
| 17912 | Mackenco Inc | Columbus, OH 43235 | Oil & Gas Operator | Dec 2020 |
| 17913 | Mackey Consulting & Leasing LLC | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 17914 | Mackinaw Two, LLC | | Oil & Gas Operator | May 2020 |
| 17915 | Maclane Gas Company L.P. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Mar 1994 |
| 17916 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 17917 | Maco Incorporate | | Oil Operator | Jun 1984 |
| 17918 | Macpherson Oil Company | | Oil & Gas Operator | Feb 2025 |
| 17919 | Macpherson Operating Company L.P. | | Oil & Gas Operator | Feb 2025 |
| 17920 | Macro Oil Company | Bartlesville, OK 74006 | Oil Operator | Aug 1999 |
| 17921 | Macum Energy Inc | Billings, MT 59104 | Oil & Gas Operator | Aug 2021 |
| 17922 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 17923 | Mad Operators LLC | | Oil & Gas Operator | Jan 2025 |
| 17924 | Madco Energy Corp | Logan, OH 43138 | Oil & Gas Operator | Dec 1987 |
| 17925 | Madden Ventures | Mundelein, IL 60060 | Oil & Gas Operator | Dec 2008 |
| 17926 | Maddox Energy Corporation | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |
| 17927 | Maddox Oil & Gas | | Gas Operator | Jun 1982 |
| 17928 | Maddox Oil & Gas, Inc. | | Oil Operator | Apr 1983 |
| 17929 | Maddox Operating | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 17930 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | May 2025 |
| 17931 | Maddux, Elizabeth H. | San Antonio, TX 78217 | Oil & Gas Operator | Nov 1995 |
| 17932 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 17933 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | May 2025 |
| 17934 | Madison Brothers Investment, LLC | Brownsville, KY 42210 | Oil & Gas Operator | Dec 2023 |
| 17935 | Madison Mark T | Marienville, PA 16239-6029 | Oil & Gas Operator | Dec 2012 |
| 17936 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 17937 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 17938 | Madtick Dev Corp | Punxsutawney, PA 15767-1179 | Oil & Gas Operator | Dec 2024 |
| 17939 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 17940 | Maertins Production, LLC | Queen City, TX 75572 | Oil Operator | May 2025 |
| 17941 | Magaw & Zimmer | Perry, OK 73077-1055 | Oil & Gas Operator | Aug 2013 |
| 17942 | Magellan E&P Holdings, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 17943 | Magellan Exploration Co LTD | Bethany, OK 73008-0909 | Oil & Gas Operator | Jun 2014 |
| 17944 | Maggard Joe | Mannford, OK 74044 | Oil & Gas Operator | May 2023 |
| 17945 | Maggard Oil Co Inc | Manford, OK 74044 | Oil & Gas Operator | Sep 1997 |
| 17946 | Maggard Supply & Oil Company | Mannford, OK 74044-1407 | Oil & Gas Operator | Nov 2014 |
| 17947 | Maggard VIrginia J | Mannford, OK 74044-3027 | Oil Operator | Feb 2025 |
| 17948 | Maggert Energy Corp. | Spring, TX 77387 | Gas Operator | Jun 1998 |
| 17949 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 17950 | Magic City Oil & Gas | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 17951 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 17952 | Magic Oil & Gas Inc. | Houston, TX 77079 | Oil & Gas Operator | Jan 2001 |
| 17953 | Magma Resources LLC | Paoli, OK 73074 | Oil & Gas Operator | Feb 2025 |
| 17954 | Magna Diversified Group, Inc. | Jacksonville, TX 75766 | Oil & Gas Operator | Oct 2013 |
| 17955 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 17956 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 17957 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 17958 | Magnatex Petrole | | Oil Operator | Jun 1994 |
| 17959 | Magnatex Petroleum | | Oil Operator | Apr 1993 |
| 17960 | Magness Petroleum Company | | Oil & Gas Operator | Dec 1994 |
| 17961 | Magnet Oil LP | Bronte, TX 76933 | Oil & Gas Operator | May 2025 |
| 17962 | Magnolia Oil & Gas Operating LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 17963 | Magnolia Petroleum Inc | Tulsa, OK 74106-2433 | Oil Operator | Jun 2018 |
| 17964 | Magnolia Production Co | Atlanta, TX 75551 | Oil & Gas Operator | May 2025 |
| 17965 | Magnolia Production Company LLC | | Oil & Gas Operator | Nov 2024 |
| 17966 | Magnum DRLG Of Ohio, Inc | Ashland, KY 41102 | Oil & Gas Operator | Dec 2023 |
| 17967 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | Mar 2025 |
| 17968 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 17969 | Magnum Exploration Kansas, LLC | Lipan, TX 76462 | Oil Operator | Oct 2016 |
| 17970 | Magnum Gas Pipeline, L.L.C. | | Oil Operator | Dec 2024 |
| 17971 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 17972 | Magnum Hunter Resources Corporation | | Oil & Gas Operator | Nov 2019 |
| 17973 | Magnum Minerals, Inc. | | Oil & Gas Operator | May 1998 |
| 17974 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 17975 | Magnum Oil & Gas Inc. | Linn, WV 26384 | Gas Operator | Dec 2021 |
| 17976 | Magnum Oil, LLC | Hartford, KY 42347 | Oil Operator | Dec 2023 |
| 17977 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | May 2025 |
| 17978 | Magnum Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 17979 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 17980 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 17981 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 17982 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 17983 | Magnusson Karl E | | Oil Operator | Apr 1987 |
| 17984 | Magpie Operating, Inc | | Oil & Gas Operator | Mar 2025 |
| 17985 | Magruder '81, LTD. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 17986 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 17987 | Maguire James Q Inc | Norman, OK 73070-1748 | Oil & Gas Operator | Jun 2011 |
| 17988 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 17989 | Maha Energy Us Inc | | Oil Operator | Nov 2023 |
| 17990 | Mahan, Janet L | | Oil & Gas Operator | Feb 2025 |
| 17991 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 17992 | Mahl, Matthew J. | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 17993 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 17994 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 17995 | Mahue Construction Company | Huntington, WV 25724-2345 | Oil & Gas Operator | Dec 2021 |
| 17996 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 17997 | Mai Operations | | Oil Operator | Dec 1996 |
| 17998 | Maier Resources Inc | Oklahoma City, OK 73157-2996 | Oil & Gas Operator | Mar 2015 |
| 17999 | Maier, H Paul | | Oil Operator | Dec 2023 |
| 18000 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |