| 1 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 2 | M & H Enterprises | Bartlesville, OK 74006-5504 | Oil & Gas Operator | Jan 2013 |
| 3 | M & S Oil Co | Lawrenceburg, IN 47025-8675-8675 | Oil & Gas Operator | Aug 2000 |
| 4 | M.T. Oil Co. | Copan, OK 74022 | Oil Operator | Nov 2023 |
| 5 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Feb 2024 |
| 6 | Macro Oil Company | Bartlesville, OK 74006 | Oil Operator | Aug 1999 |
| 7 | Mantex Inc | Tulsa, OK 74114-6234 | Oil & Gas Operator | Mar 2015 |
| 8 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jan 2024 |
| 9 | Marco Oil Co, Inc | Sparta, KY 41086 | Oil Operator | Dec 2021 |
| 10 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2024 |
| 11 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 12 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Jan 2024 |
| 13 | Matoush Wade E | | Oil & Gas Operator | Mar 2014 |
| 14 | McClintock, Robert T | | Oil & Gas Operator | Nov 2023 |
| 15 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 16 | McGonigal Donald T | Tulsa, OK 74114-2145 | Oil & Gas Operator | Jul 2004 |
| 17 | Meador Hubbell Meador Inc | Beggs, OK 74421-0794 | Oil & Gas Operator | Apr 2020 |
| 18 | Meador Oil Company Inc | Lubbock, TX 79408-2219 | Oil & Gas Operator | Oct 2022 |
| 19 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 20 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 21 | Metro Energy LTD | Scottsdale, AZ 85254 | Oil Operator | Aug 2000 |
| 22 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 23 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 24 | Mito Resources LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
| 25 | MJ Goetz Bonding, LLC | | Oil Operator | Jan 2024 |
| 26 | Moore Oil And Gas | Burleson, TX 76028 | Oil & Gas Operator | Apr 2024 |
| 27 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 28 | Moore Tommy M | Sapulpa, OK 74066-8273 | Oil & Gas Operator | May 2013 |
| 29 | Morrison Oil Company | Bartlesville, OK 74005-1059 | Oil Operator | Mar 2015 |
| 30 | Moze Inc | Ochelata, OK 74051 | Oil & Gas Operator | Jan 2001 |
| 31 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Feb 2024 |
| 32 | Murphy Jack L | Tulsa, OK 74104-4915 | Oil Operator | Mar 2015 |