| 18001 | Maya Oil LLC | | Oil Operator | Mar 2026 |
| 18002 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Oct 2025 |
| 18003 | Maybrier Brothers | | Oil Operator | Apr 2006 |
| 18004 | Maybrier Production, L.L.C. | | Oil Operator | Oct 2022 |
| 18005 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Jun 2026 |
| 18006 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 18007 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 18008 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Jun 2026 |
| 18009 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Jun 2026 |
| 18010 | Mayfield SWD LLC | McKinney, TX 75070-5020 | Oil Operator | Aug 2021 |
| 18011 | Mayhar N D | Eufaula, OK 74432 | Oil Operator | Apr 2015 |
| 18012 | Mayhew Properties | | Gas Operator | Feb 2026 |
| 18013 | Mayjac I, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 18014 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 18015 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 18016 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 18017 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 18018 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | Jun 2026 |
| 18019 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jun 2026 |
| 18020 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 18021 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 18022 | Mays Gas & Coal Co | Clarion, PA 16214-0447 | Oil & Gas Operator | Dec 2025 |
| 18023 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 18024 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 18025 | Mayshark, James Page | Sherman, NY 14781 | Gas Operator | Dec 2024 |
| 18026 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | Jun 2026 |
| 18027 | Mazurkiewicz, Gary, Kimberly, Matt | Perrysburg, NY 14129 | Gas Operator | Dec 2024 |
| 18028 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | Jun 2026 |
| 18029 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 18030 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Feb 2026 |
| 18031 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 18032 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 18033 | Mbi Oil & Gas LLC | Dickinson, ND 58601 | Oil & Gas Operator | Apr 2026 |
| 18034 | MBM Partnership | | Gas Operator | Nov 1991 |
| 18035 | MBM Production, LLC | Pikeville, KY 41501 | Oil & Gas Operator | Dec 2024 |
| 18036 | Mbo, LLC | | Oil Operator | Jan 2025 |
| 18037 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2026 |
| 18038 | MBS Resources Inc | Wilcox, PA 15870-1810 | Oil & Gas Operator | Dec 2025 |
| 18039 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Jun 2026 |
| 18040 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 18041 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Aug 2025 |
| 18042 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 18043 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | Jun 2026 |
| 18044 | McAdams Roux & Associates | Denver, CO 80202 | Oil & Gas Operator | Dec 1999 |
| 18045 | McAdams, J F | | Oil Operator | May 1971 |
| 18046 | McAlester Fuel Co. | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 18047 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 18048 | McAninch J W | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2000 |
| 18049 | McAninch Michael E | Tonkawa, OK 74653-4415 | Oil & Gas Operator | May 2013 |
| 18050 | McAninch W Kent | Tonkawa, OK 74653-4216 | Oil & Gas Operator | Oct 2016 |
| 18051 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 18052 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 18053 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | Jun 2026 |
| 18054 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 18055 | McBo Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 18056 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 18057 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 18058 | McBride, Jane | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 18059 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 18060 | McBride, Nicholas J. & Holly M. | Lakeland, FL 33810 | Gas Operator | Dec 2024 |
| 18061 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 18062 | McCabe Oil And Gas LLC / Osage Only | | Oil Operator | Mar 2026 |
| 18063 | McCabe, William G | | Oil & Gas Operator | Aug 2013 |
| 18064 | McCaffery & Krampf Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2012 |
| 18065 | McCall Carl E | Fairmount City, PA 16224 | Oil & Gas Operator | Dec 2025 |
| 18066 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | Jun 2026 |
| 18067 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2026 |
| 18068 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 18069 | McCandlish R L Oil Co Inc | Bremen, OH 43107 | Oil & Gas Operator | Dec 1997 |
| 18070 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 18071 | McCann Drilling | | Oil & Gas Operator | Oct 1996 |
| 18072 | McCann Drilling, Inc. | Bartlesville, OK 74003 | Oil Operator | Mar 2011 |
| 18073 | McCann Mark Wind | | Oil & Gas Operator | Dec 1994 |
| 18074 | McCann Petroleum, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Jul 1998 |
| 18075 | McCann Resources Inc | | Oil & Gas Operator | Feb 2026 |
| 18076 | McCart Sue | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2024 |
| 18077 | McCarter, A. Nelson | Houston, TX 77063 | Oil & Gas Operator | Aug 2003 |
| 18078 | McCarter, W. B. Jr. | Houston, TX 77063 | Oil & Gas Operator | Feb 2002 |
| 18079 | McCarter-Greenbrier-Macdonald | | Oil Operator | Sep 1981 |
| 18080 | McCarthy Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2007 |
| 18081 | McCarthy Oil Co. | | Oil Operator | Dec 1998 |
| 18082 | McCarthy Oil Com | | Oil Operator | Jun 1994 |
| 18083 | McCarthy Tim W - | | Oil Operator | Mar 1994 |
| 18084 | McCarthy, Lawrence J. | Plains, MT 59859-9215 | Oil & Gas Operator | Nov 2011 |
| 18085 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Feb 2026 |
| 18086 | McCarty Francis | | Oil Operator | Sep 1993 |
| 18087 | McCaskey, Jeffrey A. | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 18088 | McCasland Management Inc | Hobbs, NM 88240 | Oil & Gas Operator | Aug 2020 |
| 18089 | McCauley Production | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 18090 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 18091 | McChesney Michael & Ayo Joseph R | Pinedale, WY 82941-1282 | Oil Operator | Nov 2019 |
| 18092 | McClain Oil Co | Granville, OH 43023 | Oil & Gas Operator | Dec 1988 |
| 18093 | McClane Energy Inc | | Oil & Gas Operator | Aug 2017 |
| 18094 | McCleese Enterprises LLC | Richardson, TX 75082-4839 | Gas Operator | Dec 2017 |
| 18095 | McClellan Oil Corporation | Roswell, NM 882020730 | Oil & Gas Operator | May 2015 |
| 18096 | McClelland Creek Properties,Inc. | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 18097 | McClelland Oil - | | Oil Operator | Dec 2009 |
| 18098 | McClelland, C.R. Operations, Inc. | Madison, KS 66860 | Oil Operator | Aug 1998 |
| 18099 | McClintock V C | Casper, WY 82601 | Oil & Gas Operator | May 2024 |
| 18100 | McClintock, Robert T | | Oil & Gas Operator | Jan 2026 |