| 1 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Feb 2024 |
| 2 | Magic Investments LLC | Edmond, OK 73013-1688 | Oil & Gas Operator | Nov 2023 |
| 3 | Majors John Dba Majors Production Co | Weleetka, OK 74880-0702 | Oil & Gas Operator | Jan 2024 |
| 4 | Manis Oil & Gas Inc | Blanchard, OK 73010-6654 | Oil & Gas Operator | Jan 2024 |
| 5 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 6 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2024 |
| 7 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 8 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 9 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 10 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 11 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 12 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Dec 2023 |
| 13 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 14 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 15 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 16 | Milburn R Kenneth | Ardmore, OK 73402-1118 | Oil & Gas Operator | Sep 2014 |
| 17 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 18 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 19 | Moffitt W G Trust | Fort Gibson, OK 74434-4258 | Gas Operator | Nov 2019 |
| 20 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2024 |
| 21 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 22 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 23 | Morton Leases Inc | | Oil & Gas Operator | Dec 2023 |
| 24 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Feb 2024 |
| 25 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jan 2024 |
| 26 | Muras Energy, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 27 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 28 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2024 |