| 1 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | Jul 2025 |
| 2 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 3 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 4 | Magma Resources LLC | Paoli, OK 73074 | Oil & Gas Operator | Apr 2025 |
| 5 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | Jul 2025 |
| 6 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Apr 2025 |
| 7 | Marathon Oil Company LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 8 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73105 | Oil & Gas Operator | Jun 2025 |
| 9 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2025 |
| 10 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 11 | Marsh Lonnie C | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 12 | Marsh Oil & Gas Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2025 |
| 13 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 14 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | May 2025 |
| 15 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 16 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 17 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 18 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | May 2025 |
| 19 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Jun 2025 |
| 20 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Jun 2025 |
| 21 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 22 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 23 | McMillin C C & Company Inc | Guthrie, OK 73044 | Oil & Gas Operator | Jun 2025 |
| 24 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Jul 2025 |
| 25 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 26 | Mer-Bar Exploration Co Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 1992 |
| 27 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 28 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 29 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Jun 2025 |
| 30 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Jun 2025 |
| 31 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 32 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2025 |
| 33 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 34 | Mikco Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2001 |
| 35 | Miller-McGee Operating Inc | Stroud, OK 74079 | Oil & Gas Operator | Jun 2025 |
| 36 | Milne Lewis Joel | Allen, OK 74825 | Oil & Gas Operator | Mar 2015 |
| 37 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 38 | Minihan Oil And Gas Company | Seminole, OK 74868-9790 | Oil & Gas Operator | Sep 2014 |
| 39 | Minihan Production Co | Seminole, OK 74868 | Oil & Gas Operator | Jan 1997 |
| 40 | Miracle Production Inc | Yukon, OK 73085-0680 | Oil & Gas Operator | Jun 2007 |
| 41 | Miura Petroleum, Inc. | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 42 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 43 | Monexco Operating Company | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 44 | Monroe Natural Gas Inc | Norman, OK 73071 | Oil & Gas Operator | Jun 2025 |
| 45 | Montgomery Exploration Co LTD | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 46 | Montgomery Jake E | Henryetta, OK 74437 | Oil & Gas Operator | Jan 2025 |
| 47 | Moore David K | Duncan, OK 73575 | Oil & Gas Operator | Oct 2009 |
| 48 | Moran Oil Enterprises, LLC | Seminole, OK 74818 | Oil & Gas Operator | Dec 2019 |
| 49 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Jul 2025 |
| 50 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 51 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Feb 2025 |
| 52 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 53 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 54 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Apr 2025 |