| 1 | Maintainer Energy Res Corp Inc | Morris, OK 74445-2663 | Oil Operator | Oct 2025 |
| 2 | Majestic Energy Company LLC | Keifer, OK 74041 | Oil Operator | Oct 2025 |
| 3 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 4 | Maly & Maly Oil | Beggs, OK 74421-2844 | Oil & Gas Operator | Oct 2025 |
| 5 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2025 |
| 6 | Manna Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Dec 2014 |
| 7 | Mantex Inc | Tulsa, OK 74114-6234 | Oil & Gas Operator | Mar 2015 |
| 8 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 9 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 10 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Sep 2025 |
| 11 | Martin Billy G | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 12 | Martin Burt K | Henryetta, OK 74437 | Oil & Gas Operator | Jul 2008 |
| 13 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 14 | Mathews & Casselman Oil Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 15 | Mathews Billy J | Morris, OK 74445-4826 | Oil & Gas Operator | Aug 2025 |
| 16 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 17 | May Energy Company | Stroud, OK 74079 | Oil & Gas Operator | May 2013 |
| 18 | McCart Sue | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2024 |
| 19 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Oct 2025 |
| 20 | McKinney Kenneth R | Okmulgee, OK 74447-6932 | Oil Operator | Aug 2000 |
| 21 | MCM Energy Inc | Edmond, OK 73013-8035 | Oil & Gas Operator | Nov 2021 |
| 22 | McNeill Randy & W R | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2013 |
| 23 | Meador Hubbell Meador Inc | Beggs, OK 74421-0794 | Oil & Gas Operator | Apr 2020 |
| 24 | Meador Oil Company Inc | Lubbock, TX 79415 | Oil & Gas Operator | Oct 2022 |
| 25 | Meadors Jr J W Trust | Bixby, OK 74008-0151 | Oil & Gas Operator | Aug 2013 |
| 26 | Meehan Doug | Coweta, OK 74429-0813 | Oil & Gas Operator | Apr 2020 |
| 27 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 28 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 29 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 30 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 31 | Midway Leasing Inc | Haskell, OK 74436-2406 | Oil & Gas Operator | Jan 2024 |
| 32 | Midwest Oil Company | Beggs, OK 74421-2976 | Oil Operator | Apr 2015 |
| 33 | Miller John Production | Bristow, OK 74010-2455 | Oil & Gas Operator | Jul 2016 |
| 34 | Miller Oil & Gas Co | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2017 |
| 35 | Minihan Oil And Gas Company | Seminole, OK 74868-9790 | Oil & Gas Operator | Sep 2014 |
| 36 | Mitchell Cecil D | Haskell, OK 74436-7667 | Oil & Gas Operator | Apr 2020 |
| 37 | Mitchell Martha | Henryetta, OK 74437-0488 | Oil & Gas Operator | Apr 2011 |
| 38 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Dec 2025 |
| 39 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 40 | Mode Oil & Gasdev LTD12/21/Ofb 9-98 | | Oil & Gas Operator | May 2013 |
| 41 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Oct 2025 |
| 42 | Montgomery Jake E | Henryetta, OK 74437 | Oil & Gas Operator | Sep 2025 |
| 43 | Montgomery Oil & Gas Expl Inc | Tulsa, OK 74170-1884 | Oil & Gas Operator | Mar 2005 |
| 44 | Moore Investments LC | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Feb 2023 |
| 45 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 46 | Moore Tommy M | Sapulpa, OK 74066-8273 | Oil & Gas Operator | May 2013 |
| 47 | Morton Bros A Partnership | Bristow, OK 74010-0403 | Oil & Gas Operator | Jul 2003 |
| 48 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 49 | Morton Leases Inc | | Oil & Gas Operator | Oct 2025 |
| 50 | Mott Oil & Gas | Sugarland, TX 77478 | Oil & Gas Operator | May 2001 |
| 51 | Munson, David M. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 52 | Murphy Helen Colpitt Trust | Collinsville, OK 74021-0128 | Oil & Gas Operator | May 2002 |