| 19001 | Mesa Chica Corp. | San Antonio, TX 78278 | Oil & Gas Operator | May 2018 |
| 19002 | Mesa Energy Partners LLC | | Oil & Gas Operator | Sep 2015 |
| 19003 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 19004 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Mar 2025 |
| 19005 | Mesa Gulf Coast LLC | | Oil & Gas Operator | Dec 2020 |
| 19006 | Mesa Hydrocarbons LLC | | Oil & Gas Operator | Sep 2003 |
| 19007 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 19008 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 19009 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 19010 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 19011 | Mesa Petroleum C | | Oil & Gas Operator | Dec 1986 |
| 19012 | Mesa Petroleum Co. | | Oil & Gas Operator | Aug 1985 |
| 19013 | Mesa Production Company | Amarillo, TX 79189 | Oil & Gas Operator | Dec 1983 |
| 19014 | Mesa Ridge Holdings LLC | Abilene, TX 79603 | Oil Operator | Jun 2025 |
| 19015 | Mesa VIsta Operating, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 19016 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 19017 | Mescko Producing & Operating Co. Inc. | Burbank, OH 44214 | Oil & Gas Operator | Dec 2024 |
| 19018 | Mesh LTD | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2024 |
| 19019 | Mesquite Land & Minerals Co. | Albany, TX 76430 | Oil Operator | Jun 2025 |
| 19020 | Mesquite Oil & Gas | Olney, TX 76374 | Oil & Gas Operator | Jun 2025 |
| 19021 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 19022 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Jun 2025 |
| 19023 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Feb 2025 |
| 19024 | Messer LLC | | Gas Operator | Jul 2024 |
| 19025 | Messman Corporation | Wichita, KS 67208 | Oil & Gas Operator | Feb 2025 |
| 19026 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 19027 | Messy Oil And Gas, LLC | Garwood, TX 77442 | Oil & Gas Operator | Jun 2025 |
| 19028 | Mestena Operating, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 19029 | Mestena Operating, LTD. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jun 2009 |
| 19030 | Mestena, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Nov 2001 |
| 19031 | Metairie Energy Company, Inc. | | Oil & Gas Operator | Nov 2019 |
| 19032 | Metano Energy III, LP | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2025 |
| 19033 | Metano Energy, LP | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2008 |
| 19034 | Metcalf John C Dba Metcalf Dri | Glouster, OH 45732 | Oil & Gas Operator | Dec 2006 |
| 19035 | Metco Oil Corporation | Seguin, TX 78155 | Oil Operator | Apr 2016 |
| 19036 | Meteor Developments Inc | Denver, CO BAD ADDR | Oil & Gas Operator | Dec 1995 |
| 19037 | Meter, Erin L. & William J. | Dansville, NY 14437 | Gas Operator | Dec 2023 |
| 19038 | Metgas Co, A Partnership | | Oil & Gas Operator | Dec 2016 |
| 19039 | Methane Productions Inc | Recluse, WY 82725 | Oil & Gas Operator | Apr 2007 |
| 19040 | Metis Energy LLC | Friendswood, TX 77546 | Oil & Gas Operator | Jun 2025 |
| 19041 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 19042 | Metro Energy LTD | Scottsdale, AZ 85254 | Oil Operator | Aug 2000 |
| 19043 | Metro Energy, Inc. | Gladstone, MO 64118 | Oil Operator | May 1997 |
| 19044 | Metro Oil Compan | | Oil Operator | Jan 1991 |
| 19045 | Metroplex Barnett Shale LLC | Houston, TX 77001 | Gas Operator | Sep 2008 |
| 19046 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 19047 | Mettz,Carmody & Foster Oil Co | | Oil Operator | May 1990 |
| 19048 | Metzger Ed W & Sue | Junction City, OH 43748 | Oil Operator | Dec 2024 |
| 19049 | Metzger Francis A | Junction City, OH 43748 | Oil & Gas Operator | Dec 1999 |
| 19050 | Metzgers Bob | Junction City, OH 43748 | Oil & Gas Operator | Dec 2024 |
| 19051 | Metzner, Norma J. Estate | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1998 |
| 19052 | Mewbourne Marketing, Inc. | | Oil & Gas Operator | Mar 2013 |
| 19053 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Jun 2025 |
| 19054 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 19055 | Mextex Operating Company | Austin, TX 78734 | Oil & Gas Operator | Jun 2025 |
| 19056 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 19057 | Meyer Oil Co., Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Feb 2025 |
| 19058 | Meyer Richard C Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 19059 | Meyer, David M. | South Wales, NY 14139 | Gas Operator | Dec 2023 |
| 19060 | Meyer, Norbert | Conway Springs, KS 67031 | Oil Operator | Aug 1994 |
| 19061 | Meyer, Ruskin H. Et Al | | Oil Operator | Oct 1980 |
| 19062 | Meyer, Theodore J. | Conway Springs, KS 67031 | Oil Operator | Feb 2025 |
| 19063 | Meyerhoff & Cox Inc | Tulsa, OK 74135-7830 | Oil Operator | Aug 1993 |
| 19064 | Meyers Marsha L | Danville, OH 43014 | Oil & Gas Operator | Dec 2007 |
| 19065 | Meyers-Lasher, Inc. | | Oil & Gas Operator | Mar 1999 |
| 19066 | MFC Drilling Inc | Coshocton, OH 43812 | Oil & Gas Operator | Dec 2024 |
| 19067 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Mar 2025 |
| 19068 | MFP Petroleum LTD. Partnership | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2017 |
| 19069 | Mga Energy Inc | Corning, OH 43730 | Oil & Gas Operator | Dec 2024 |
| 19070 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Mar 2025 |
| 19071 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 19072 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 19073 | MGM Oil & Gas Inc. | Ballinger, TX 76821 | Oil & Gas Operator | Jun 2025 |
| 19074 | MGM Well Service, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2004 |
| 19075 | MH Oilfield Service LLC | Amesville, OH 45711 | Oil & Gas Operator | Dec 2023 |
| 19076 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 19077 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Jun 2025 |
| 19078 | Mi-Co Oil & Gas LLC | Caddo, TX 76429 | Oil Operator | Jun 2025 |
| 19079 | Miami Oil Producers Inc | Reno, NV 89501 | Oil & Gas Operator | Dec 2012 |
| 19080 | Mica Energy Corp. | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 19081 | Mich Geosearch/Eagle O&G | Wichita Falls, TX 76308-1061-1061 | Oil & Gas Operator | Dec 2001 |
| 19082 | Mich-La Oil & Gas Exploration | | Oil & Gas Operator | Jan 1992 |
| 19083 | Michael D Brown | | Oil Operator | Jul 1993 |
| 19084 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | Feb 2025 |
| 19085 | Michael D. Weilert Oil Company | | Oil Operator | Feb 2025 |
| 19086 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Mar 2025 |
| 19087 | Michael Petr. & Hurd Ent., LTD. | Houston, TX 77056 | Oil & Gas Operator | Oct 1993 |
| 19088 | Michael Petroleum Corporation | Houston, TX 77040 | Oil & Gas Operator | Dec 2001 |
| 19089 | Michael W Mills | | Oil Operator | Jul 2007 |
| 19090 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 19091 | Michaels, Bobby W | | Oil Operator | Nov 1998 |
| 19092 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | Jun 2025 |
| 19093 | Michel T. Halbouty | | Oil & Gas Operator | Dec 1996 |
| 19094 | Michel T. Halbouty Energy Co. | | Oil & Gas Operator | Nov 1986 |
| 19095 | Michigan Gas Utilities Co | | Oil & Gas Operator | Mar 2011 |
| 19096 | Michigan Geosearch Inc | Lansing, MI 48917 | Oil & Gas Operator | Jan 2025 |
| 19097 | Michigan Oil Co. | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 19098 | Michigan Petroleum Exploration Inc | | Oil & Gas Operator | Oct 2005 |
| 19099 | Michigan Production Co LLC | | Oil & Gas Operator | Oct 2002 |
| 19100 | Michigan-Wisconsin Pipe Line Co | | Oil & Gas Operator | Dec 1983 |