| 1 | M E Booth Corporation | Ada, OK 74820 | Oil Operator | Jun 2025 |
| 2 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | Jul 2025 |
| 3 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |
| 4 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 5 | Magaw & Zimmer | Perry, OK 73077-1055 | Oil & Gas Operator | Aug 2013 |
| 6 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 7 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73105 | Oil & Gas Operator | Jun 2025 |
| 8 | Marler Philip | Purcell, OK 73080-1522 | Oil & Gas Operator | Nov 2016 |
| 9 | Marsh Lonnie C | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 10 | Marsh Oil & Gas Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2025 |
| 11 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 12 | Massad George H Estate | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2014 |
| 13 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 14 | Massad Oil Company | Holdenville, OK 74848-2629 | Oil Operator | Jun 2025 |
| 15 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 16 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 17 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Jul 2025 |
| 18 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 19 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Jun 2025 |
| 20 | Moabb Oil Corp | | Oil & Gas Operator | Apr 1998 |
| 21 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 22 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 23 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Feb 2025 |
| 24 | Murphy Jack L | Tulsa, OK 74104-4915 | Oil Operator | Mar 2015 |