| 101 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 102 | Marple Petroleum LLC | Edmond, OK 73013 | Oil Operator | Apr 2025 |
| 103 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 104 | Marrs Bros Oil Co Inc | Drumright, OK 74030 | Oil Operator | Sep 1994 |
| 105 | Marsh Lonnie C | Konawa, OK 74849 | Oil & Gas Operator | Mar 2025 |
| 106 | Marsh Oil & Gas Company | Pauls Valley, OK 73075 | Oil & Gas Operator | Apr 2025 |
| 107 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Mar 2025 |
| 108 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 109 | Martin Billy G | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 110 | Martin Burt K | Henryetta, OK 74437 | Oil & Gas Operator | Jul 2008 |
| 111 | Martin John R | Cushing, OK 74023 | Oil & Gas Operator | Apr 1995 |
| 112 | Martin Jr, James U | | Oil & Gas Operator | Apr 2025 |
| 113 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Apr 2025 |
| 114 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 115 | Martin Production Corporation | Graham, TX 76450 | Oil Operator | May 2025 |
| 116 | Martin Tank Truck & Casing Pulling Inc | Cushing, OK 74023 | Oil & Gas Operator | Apr 2015 |
| 117 | Martin'S Resources LLC | Woodward, OK 73801-5641 | Oil & Gas Operator | Apr 2025 |
| 118 | Marvel Joseph Shawn | Haskell, OK 74436 | Oil Operator | Apr 2025 |
| 119 | Marymac Company | Dallas, TX 75219-2362 | Oil & Gas Operator | Mar 2015 |
| 120 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Jul 2025 |
| 121 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Jul 2025 |
| 122 | Masham Production Corporation | Enid, OK 73702 | Oil & Gas Operator | Aug 2000 |
| 123 | Mason Oil Company Inc | Nowata, OK 74048 | Oil Operator | Oct 2007 |
| 124 | Mason Oil Inc | Blanchard, OK 73010-2903 | Oil & Gas Operator | Feb 2009 |
| 125 | Mason Robert A | | Oil Operator | May 1993 |
| 126 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 127 | Mason, Tommy L | | Oil & Gas Operator | May 2013 |
| 128 | Massad George H Estate | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2014 |
| 129 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 130 | Massad Oil Company | Holdenville, OK 74848-2629 | Oil Operator | Apr 2025 |
| 131 | Masters Dorothy V | Davis, OK 73030-0397 | Oil & Gas Operator | May 2020 |
| 132 | Masters Loy C | Davis, OK 73030-0397 | Oil & Gas Operator | Apr 2005 |
| 133 | Matador E & P Company Inc | | Oil & Gas Operator | May 2020 |
| 134 | Matherly Elaine | Bristow, OK 74010-9536 | Oil Operator | Mar 2015 |
| 135 | Mathews & Casselman Oil Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 136 | Mathews Billy J | Morris, OK 74445-4826 | Oil & Gas Operator | May 2025 |
| 137 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 138 | Mathews Roger Dba Mathews Oil/Trans Energy | Kellyville, OK 74039 | Oil Operator | May 2025 |
| 139 | Matna Enterprises LLC | Maud, OK 74854-2812 | Oil & Gas Operator | Apr 2025 |
| 140 | Mator LLC | Hennessey, OK 73742-1235 | Oil & Gas Operator | May 2025 |
| 141 | Matoush Wade E | | Oil & Gas Operator | Mar 2014 |
| 142 | Mattea Oil & Gas LLC | Drumright, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 143 | Matthews Florine D | Bristow, OK 74010 | Oil & Gas Operator | Jan 2020 |
| 144 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | May 2025 |
| 145 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | May 2025 |
| 146 | Matthews Oil & Gas LLC | Weleetka, OK 74880-7312 | Oil & Gas Operator | Apr 2020 |
| 147 | Maverick Brothers Resources LLC | Enid, OK 73701 | Oil & Gas Operator | Apr 2025 |
| 148 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 149 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Jul 2025 |
| 150 | Max Oil Company | Blackwell, OK 74631 | Oil & Gas Operator | Apr 2024 |
| 151 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Apr 2025 |
| 152 | Maxine Oil Company | Muskogee, OK 74401-0512 | Oil & Gas Operator | Sep 2014 |
| 153 | Maxland Oil Company | Haslet, TX 76052-5137 | Oil Operator | Nov 2014 |
| 154 | Maxwell Resources Corporation | Oklahoma City, OK 73116-7746 | Oil & Gas Operator | Apr 2009 |
| 155 | May Energy Company | Stroud, OK 74079 | Oil & Gas Operator | May 2013 |
| 156 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 157 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Apr 2025 |
| 158 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 159 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Jul 2025 |
| 160 | Mayfield SWD LLC | McKinney, TX 75070-5020 | Oil Operator | Aug 2021 |
| 161 | Mayhar N D | Eufaula, OK 74432 | Oil Operator | Apr 2015 |
| 162 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 163 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2025 |
| 164 | McAninch J W | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2000 |
| 165 | McAninch Michael E | Tonkawa, OK 74653-4415 | Oil & Gas Operator | May 2013 |
| 166 | McAninch W Kent | Tonkawa, OK 74653-4216 | Oil & Gas Operator | Oct 2016 |
| 167 | McCabe Oil And Gas LLC / Osage Only | | Oil Operator | Apr 2025 |
| 168 | McCabe, William G | | Oil & Gas Operator | Aug 2013 |
| 169 | McCann Resources Inc | | Oil & Gas Operator | Apr 2025 |
| 170 | McCart Sue | Okmulgee, OK 74447-8580 | Oil & Gas Operator | Nov 2024 |
| 171 | McChesney Michael & Ayo Joseph R | Pinedale, WY 82941-1282 | Oil Operator | Nov 2019 |
| 172 | McCleese Enterprises LLC | Richardson, TX 75082-4839 | Gas Operator | Dec 2017 |
| 173 | McClintock V C | Casper, WY 82601 | Oil & Gas Operator | May 2024 |
| 174 | McClintock, Robert T | | Oil & Gas Operator | Apr 2025 |
| 175 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | May 2025 |
| 176 | McCord Al Inc | Norman, OK 73072-6720 | Oil & Gas Operator | Feb 2011 |
| 177 | McCord J K | Duncan, OK 73534-0032 | Oil Operator | Mar 2009 |
| 178 | McCorgary Martin E | Arkansas City, KS 67005-5452 | Oil & Gas Operator | Feb 2025 |
| 179 | McCoy Alex W & Associates | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2009 |
| 180 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Jun 2025 |
| 181 | McCraw Family Limited Partnership (The) | Konawa, OK 74849-5616 | Oil & Gas Operator | Jul 2024 |
| 182 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 183 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 184 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 185 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Apr 2025 |
| 186 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 187 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Apr 2025 |
| 188 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Apr 2025 |
| 189 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 190 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 191 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 192 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 193 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 194 | McGonigal Dan L | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 195 | McGonigal Donald T | Tulsa, OK 74114-2145 | Oil & Gas Operator | Jul 2004 |
| 196 | McGonigal Ted W | Norman, OK 73072 | Oil & Gas Operator | Mar 2025 |
| 197 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 198 | McGuire Tom Oil Company | Depew, OK 74028 | Oil Operator | Apr 2011 |
| 199 | McIntyre M L | Oklahoma City, OK 73154-0523 | Oil & Gas Operator | Jul 1996 |
| 200 | McKay Oil Company | Perry, OK 73077 | Oil Operator | Nov 2008 |