| 20101 | Murphy, K. P. Oil Operator | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 20102 | Murray Hill Energy, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2017 |
| 20103 | Murray J. Evans | | Oil Operator | Mar 1985 |
| 20104 | Murray Oil And Gas LLC | Greensburg, KS 67054 | Oil & Gas Operator | Jan 2025 |
| 20105 | Murray, Tom Enterprises | Monahans, TX 79756 | Oil & Gas Operator | May 2025 |
| 20106 | Murray-Teague Assoc. | | Oil Operator | Dec 2005 |
| 20107 | Murtha Contracting Inc. | Conneaut, OH 44030 | Oil & Gas Operator | Dec 2009 |
| 20108 | Murvin & Meier Oil Co. | | Oil & Gas Operator | Dec 2020 |
| 20109 | Musgrave, Dalton | | Oil Operator | Dec 2020 |
| 20110 | Musgrove Casey O | | Oil Operator | Oct 1993 |
| 20111 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Aug 2024 |
| 20112 | Musgrove Petrole | | Oil & Gas Operator | Dec 1996 |
| 20113 | Musgrove Produci | | Oil Operator | May 1989 |
| 20114 | Musgrove Producing | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 20115 | Musgrove, Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |
| 20116 | Muskegon Development Co And Miller Energy Inc An | | Gas Operator | Dec 1997 |
| 20117 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | May 2025 |
| 20118 | Muskegon Operating Company LLC | | Oil & Gas Operator | Feb 2025 |
| 20119 | Muslow And Parker | | Oil & Gas Operator | Jul 1994 |
| 20120 | Muslow Oil Industries | | Oil Operator | Jan 1995 |
| 20121 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 20122 | Musshafen, Denis | Linwood, NY 14486 | Gas Operator | Dec 2023 |
| 20123 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 20124 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 20125 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 20126 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Jan 2025 |
| 20127 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 20128 | Mustang Energy L C | | Oil & Gas Operator | Jan 2013 |
| 20129 | Mustang Fuel Cor | | Oil & Gas Operator | Dec 1990 |
| 20130 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 20131 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2025 |
| 20132 | Mustang Gas Products LLC | Oklahoma City, OK 73114-7406 | Oil & Gas Operator | Sep 2022 |
| 20133 | Mustang Holding, LLC (Finnex) | | Oil & Gas Operator | Apr 2025 |
| 20134 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 20135 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 20136 | Mustang Resources LLC | Houston, TX 77256 | Oil & Gas Operator | Mar 2025 |
| 20137 | Mutch Harry L | | Oil & Gas Operator | Oct 1991 |
| 20138 | Mutch J O | | Gas Operator | Mar 1990 |
| 20139 | Mutch Oil And Gas Development Inc | | Oil & Gas Operator | Dec 2004 |
| 20140 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |
| 20141 | Mutual Oil & Gas Co | Akron, OH 44311 | Oil & Gas Operator | Dec 2001 |
| 20142 | Mutz Oil Operator | | Oil Operator | Dec 1988 |
| 20143 | Muzyl Oil Corp | | Oil & Gas Operator | Apr 2025 |
| 20144 | MV Purchasing LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 20145 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | May 2025 |
| 20146 | MVM Resources Louisiana L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 20147 | MVP Production Inc. | | Oil & Gas Operator | Apr 2005 |
| 20148 | MVRC Partnership | Russell, KS 67655 | Oil Operator | Jan 1992 |
| 20149 | MW Oil, Inc | | Oil & Gas Operator | Jan 2025 |
| 20150 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 20151 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 20152 | MWK Petroleum, LLC | Augusta, KS 67010 | Oil Operator | Jan 2025 |
| 20153 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | May 2025 |
| 20154 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | May 2025 |
| 20155 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | May 2025 |
| 20156 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Feb 2025 |
| 20157 | My Hop Mineral | Moorhead, MN 56560 | Oil & Gas Operator | May 2025 |
| 20158 | My Investments Too LLC | | Oil Operator | Mar 2025 |
| 20159 | Myco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2003 |
| 20160 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 20161 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | May 2025 |
| 20162 | Myd, Inc. | Irving, TX 75062 | Oil & Gas Operator | Mar 1998 |
| 20163 | Myers & Hicks Gas Co | | Gas Operator | Dec 2021 |
| 20164 | Myers Drilling And Exploration Inc. | Sedan, KS 67361 | Oil Operator | Aug 2022 |
| 20165 | Myers Drilling Company | Barboursville, WV 25504 | Oil & Gas Operator | Dec 2024 |
| 20166 | Myers Robert W J | | Oil Operator | Jun 1991 |
| 20167 | Myers, A. J. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 20168 | Myers, Gus & Annie | Sedan, KS 67361 | Oil Operator | Aug 2017 |
| 20169 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 20170 | Myers, Robert L | | Oil Operator | Feb 2025 |
| 20171 | Myjo Oil Corporation | Breckenridge, TX 76024 | Oil Operator | Jul 1996 |
| 20172 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 20173 | Mystique Developments | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
| 20174 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 20175 | Myung And Associates, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2000 |
| 20176 | MZ Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 20177 | N & B Enterprise | | Oil Operator | Nov 1994 |
| 20178 | N & B Enterprises, Inc. | Iola, KS 66749 | Oil & Gas Operator | Jan 2025 |
| 20179 | N & B Oil And Gas LLC | Monahans, TX 79756 | Oil & Gas Operator | May 2025 |
| 20180 | N & K Oil & Gas Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 1998 |
| 20181 | N & N Oil | Somerset, OH 43783 | Oil & Gas Operator | Dec 2014 |
| 20182 | N & N Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | May 2023 |
| 20183 | N & O Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | May 2025 |
| 20184 | N & P Enterprises | | Oil Operator | May 1997 |
| 20185 | N & W Enterprises, Inc. | Fort Scott, KS 66701 | Oil Operator | Jan 2025 |
| 20186 | N And B Exploration, Inc. | | Oil & Gas Operator | Jun 1993 |
| 20187 | N C B Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 20188 | N Central Casing Pullers, Inc. | | Oil & Gas Operator | May 1994 |
| 20189 | N Dale Nichols | Midland, TX 79703 | Oil & Gas Operator | Jun 2004 |
| 20190 | N Eastern Oh O&G Exp Inc | Cleveland, OH 44106 | Oil & Gas Operator | Dec 1999 |
| 20191 | N H Wheless Oil Company | Shreveport, LA 71101 | Gas Operator | Sep 2002 |
| 20192 | N S P Operating Group LLC | El Campo, TX 77437 | Oil & Gas Operator | Aug 2021 |
| 20193 | N-10 Exploration, LLC | Attica, KS 67009 | Oil & Gas Operator | Jan 2025 |
| 20194 | N-A Energy LLC | Arvada, CO 80005 | Oil Operator | Dec 2024 |
| 20195 | N-B Company Inco | | Oil & Gas Operator | Apr 1992 |
| 20196 | N. A. Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2007 |
| 20197 | N. B. Hunt | | Oil & Gas Operator | May 1981 |
| 20198 | N. E. Loomis | | Oil Operator | Oct 1986 |
| 20199 | N. E. Operating Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2013 |
| 20200 | N. J. Pardue | | Oil & Gas Operator | Jul 1994 |