| 1 | M M Energy, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Jul 2025 |
| 2 | M. M. & M. Resources, Inc. | Wetumka, OK 74883 | Oil & Gas Operator | Apr 2020 |
| 3 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 4 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 5 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 6 | Majors Eugene E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Jun 2025 |
| 7 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Apr 2025 |
| 8 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Jun 2025 |
| 9 | Majors Michael | Holdenville, OK 74848-0531 | Oil & Gas Operator | Sep 1994 |
| 10 | Marathon Oil Company LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 11 | Marbet LLC | Edmond, OK 73013-6691 | Oil & Gas Operator | Jun 2025 |
| 12 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 13 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Jun 2025 |
| 14 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73105 | Oil & Gas Operator | Jun 2025 |
| 15 | Marsh Oil & Gas Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2025 |
| 16 | Massad George H Estate | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2014 |
| 17 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 18 | Massad Oil Company | Holdenville, OK 74848-2629 | Oil Operator | Jun 2025 |
| 19 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 20 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 21 | McCleese Enterprises LLC | Richardson, TX 75082-4839 | Gas Operator | Dec 2017 |
| 22 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Jul 2025 |
| 23 | McCraw Family Limited Partnership (The) | Konawa, OK 74849-5616 | Oil & Gas Operator | Jul 2024 |
| 24 | McOr Oil & Gas Corp | Houston, TX 77002 | Oil & Gas Operator | Oct 2013 |
| 25 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 26 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Jul 2025 |
| 27 | Mega Natural Gas Co | Tulsa, OK 74133 | Oil & Gas Operator | Jul 1996 |
| 28 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 29 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 30 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 31 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 32 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Jun 2025 |
| 33 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 34 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 35 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | May 2025 |
| 36 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 37 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Jun 2025 |
| 38 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 39 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 40 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 41 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 42 | Milne Lewis Joel | Allen, OK 74825 | Oil & Gas Operator | Mar 2015 |
| 43 | Mitchell Cecil D | Haskell, OK 74436-7667 | Oil & Gas Operator | Apr 2020 |
| 44 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 45 | Mitchell Martha | Henryetta, OK 74437-0488 | Oil & Gas Operator | Apr 2011 |
| 46 | Miti-Mini Inc | Wetumka, OK 74883-6172 | Gas Operator | Jul 2016 |
| 47 | Mode Oil & Gasdev LTD12/21/Ofb 9-98 | | Oil & Gas Operator | May 2013 |
| 48 | Moms Oil & Gas LLC | Nowata, OK 74048 | Oil & Gas Operator | Mar 2023 |
| 49 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jun 2025 |
| 50 | Monexco Operating Company | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 51 | Monroe Natural Gas Inc | Norman, OK 73071 | Oil & Gas Operator | Jun 2025 |
| 52 | Montego Resources Inc | Oklahoma City, OK 73172-0192 | Oil & Gas Operator | Mar 2015 |
| 53 | Montgomery Exploration Co LTD | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 54 | Moore Norman L | Sasakwa, OK 74867 | Oil Operator | Jun 2025 |
| 55 | Moran Oil Enterprises, LLC | Seminole, OK 74818 | Oil & Gas Operator | Dec 2019 |
| 56 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 57 | Morgan Robert M / L Ladean | Wewoka, OK 74884 | Oil & Gas Operator | Jul 2015 |
| 58 | Morris & Associates | Purcell, OK 73080 | Oil Operator | Feb 2012 |
| 59 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Feb 2025 |
| 60 | Murexco Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 1996 |
| 61 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |