| 18101 | Mask Thomas B | | Oil & Gas Operator | Jul 1991 |
| 18102 | Mask Thomas B And Markel Ray D And Wood K P | | Oil & Gas Operator | Aug 1986 |
| 18103 | Mask Thomas B And Patrick Petroleum Corp | | Oil & Gas Operator | Jun 1992 |
| 18104 | Maskeny Edward D | | Oil & Gas Operator | Jun 1998 |
| 18105 | Mason Drilling Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2022 |
| 18106 | Mason John C | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1994 |
| 18107 | Mason Oil Company Inc | Nowata, OK 74048 | Oil Operator | Oct 2007 |
| 18108 | Mason Oil Inc | Blanchard, OK 73010-2903 | Oil & Gas Operator | Feb 2009 |
| 18109 | Mason Producing Inc | Millersburg, OH 44654-2696 | Oil & Gas Operator | Dec 2023 |
| 18110 | Mason Robert A | | Oil Operator | May 1993 |
| 18111 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 18112 | Mason, Harold J. | Waterville, NY 13480 | Gas Operator | Dec 2023 |
| 18113 | Mason, Tommy L | | Oil & Gas Operator | May 2013 |
| 18114 | Mason-Phillips Properties Of Florida | Ville Beach, FL 32250 | Oil Operator | Apr 1999 |
| 18115 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 18116 | Mass Resources, Inc. | | Oil Operator | Jun 2024 |
| 18117 | Massad George H Estate | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2014 |
| 18118 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 18119 | Massad Oil Company | Holdenville, OK 74848-2629 | Oil Operator | Aug 2024 |
| 18120 | Massey Group, Inc. | | Oil & Gas Operator | Dec 2004 |
| 18121 | Massey, Gary R. | Eureka, KS 67045 | Oil Operator | Jul 2024 |
| 18122 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 18123 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 18124 | Mastel, Francis E. | Rantoul, KS 66079 | Oil Operator | Oct 2009 |
| 18125 | Master Pet & Devel Co Inc | Grand Junction, CO 81503 | Oil & Gas Operator | Jul 1999 |
| 18126 | Master Well Works, Inc. | | Oil Operator | Jun 2024 |
| 18127 | Masters Dorothy V | Davis, OK 73030-0397 | Oil & Gas Operator | May 2020 |
| 18128 | Masters Loy C | Davis, OK 73030-0397 | Oil & Gas Operator | Apr 2005 |
| 18129 | Masters Oil & Gas, LLC | Houston, TX 77079 | Oil & Gas Operator | Nov 2024 |
| 18130 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 18131 | Masters Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2008 |
| 18132 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | Nov 2024 |
| 18133 | Mat Oil & Gas Exploration Inc | Indiana, PA 15701-8931 | Gas Operator | Dec 1993 |
| 18134 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 18135 | Matador E & P Company Inc | | Oil & Gas Operator | May 2020 |
| 18136 | Matador Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2001 |
| 18137 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 18138 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Nov 2024 |
| 18139 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Nov 2024 |
| 18140 | Matador, Inc. | Sedan, KS 67361 | Oil Operator | Mar 2024 |
| 18141 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 18142 | Materi Exploration Inc | Upton, WY 82730 | Oil Operator | Nov 2021 |
| 18143 | Matherly Elaine | Bristow, OK 74010-9536 | Oil Operator | Mar 2015 |
| 18144 | Mathews & Casselman Oil Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 18145 | Mathews Billy J | Morris, OK 74445-4826 | Oil & Gas Operator | Aug 2024 |
| 18146 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 18147 | Mathews Roger Dba Mathews Oil/Trans Energy | Kellyville, OK 74039 | Oil Operator | Dec 2023 |
| 18148 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Nov 2024 |
| 18149 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 18150 | Matlock, Randall K. | Topeka, KS 66607 | Oil Operator | May 2000 |
| 18151 | Matna Enterprises LLC | Maud, OK 74854-2812 | Oil & Gas Operator | Jul 2024 |
| 18152 | Mator LLC | Hennessey, OK 73742-1235 | Oil & Gas Operator | Aug 2024 |
| 18153 | Matoush Wade E | | Oil & Gas Operator | Mar 2014 |
| 18154 | Matrex LLC | | Gas Operator | May 2006 |
| 18155 | Matriks Energy LLC | Ashland, KY 41102 | Gas Operator | Dec 2021 |
| 18156 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 18157 | Matrix Exploration And Development LLC | | Oil & Gas Operator | Oct 2008 |
| 18158 | Matrix New Mexico Operating Company LLC | Sugarland, TX 77479 | Oil & Gas Operator | Aug 2010 |
| 18159 | Matrix Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2001 |
| 18160 | Matrix Oil Corporation | | Oil & Gas Operator | Sep 2024 |
| 18161 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Nov 2024 |
| 18162 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 18163 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2024 |
| 18164 | Matt Prod Enterprises | Lancaster, OH 43130 | Oil & Gas Operator | Dec 2017 |
| 18165 | Mattea Oil & Gas LLC | Drumright, OK 74023 | Oil & Gas Operator | Aug 2024 |
| 18166 | Matthews Florine D | Bristow, OK 74010 | Oil & Gas Operator | Jan 2020 |
| 18167 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | Jul 2024 |
| 18168 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Aug 2024 |
| 18169 | Matthews Oil & Gas LLC | Weleetka, OK 74880-7312 | Oil & Gas Operator | Apr 2020 |
| 18170 | Matthews Operating Co., Inc. | | Gas Operator | Aug 2001 |
| 18171 | Mattingly, Inc. | Wichita, KS 67226 | Gas Operator | Jun 2011 |
| 18172 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 18173 | Matuk, Edward C. | Neodesha, KS 66757 | Oil Operator | Aug 1989 |
| 18174 | Matzinger & Bell Inc-Carl O&G | | Oil & Gas Operator | Dec 1981 |
| 18175 | Matzinger & Bell, Inc. | | Oil & Gas Operator | Dec 1982 |
| 18176 | Matzinger Petroleum Co. | | Oil & Gas Operator | Jan 1991 |
| 18177 | Mauldin Robert | Barnsdall, OK 74002 | Oil Operator | Apr 2024 |
| 18178 | Maurine B. Pyle | | Oil & Gas Operator | Mar 1993 |
| 18179 | Mauro J. Dentino | | Oil Operator | Aug 2024 |
| 18180 | Mauslein, Lenore | Wellsville, KS 66092 | Oil Operator | Oct 2001 |
| 18181 | Maverick Brothers Operating,Inc. | Enid, OK 73702 | Oil & Gas Operator | Nov 2024 |
| 18182 | Maverick Brothers Resources LLC | Enid, OK 73701 | Oil & Gas Operator | Jun 2024 |
| 18183 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 18184 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |
| 18185 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2024 |
| 18186 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 18187 | Maverick Exploration And Production Inc | | Oil & Gas Operator | Jun 2024 |
| 18188 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Nov 2024 |
| 18189 | Maverick Oil Corp. | | Oil Operator | May 1997 |
| 18190 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 18191 | Maverick Permian LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 18192 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 2024 |
| 18193 | Maverick Producers, Inc. | | Oil Operator | May 2012 |
| 18194 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 18195 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 18196 | Max Extract Technologies, LLC | Oklahoma City, OK 73105 | Gas Operator | Jun 2024 |
| 18197 | Max Oil Company | Blackwell, OK 74631-6329 | Oil & Gas Operator | Apr 2024 |
| 18198 | Max Oil LLC | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 18199 | Max Papay LLC | Meade, KS 67864 | Oil & Gas Operator | Jun 2018 |
| 18200 | Maxam Incorporat | | Oil Operator | Jun 1991 |