| 1 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 2 | M & D Pumping Service Inc | Ringwood, OK 73768-3415 | Oil & Gas Operator | May 2026 |
| 3 | M & H Enterprises | Bartlesville, OK 74006-5504 | Oil & Gas Operator | Jan 2013 |
| 4 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | May 2026 |
| 5 | M & M Petroleum Company | Mannford, OK 74044-0462 | Oil Operator | Apr 2020 |
| 6 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 7 | M & S Oil Co | Lawrenceburg, IN 47025-8675 | Oil & Gas Operator | Aug 2000 |
| 8 | M & S Operating LLC | Oklahoma City, OK 73112 | Oil Operator | Mar 1999 |
| 9 | M & T Oil Company | Copan, OK 74022 | Oil Operator | Dec 2025 |
| 10 | M & T Production Company LLC | Tulsa, OK 74132-3742 | Oil Operator | Apr 2011 |
| 11 | M And V Resources Inc | Crescent, OK 73028 | Oil & Gas Operator | May 2026 |
| 12 | M E Booth Corporation | Ada, OK 74820 | Oil Operator | Apr 2026 |
| 13 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | May 2026 |
| 14 | M G Energy LLC | Cushing, OK 74023 | Oil & Gas Operator | Apr 2026 |
| 15 | M H Oil & Gas LLC | Okeene, OK 73763-0684 | Oil & Gas Operator | Feb 2013 |
| 16 | M J M D Inc | Burlington, IA 52601 | Oil Operator | Jan 2013 |
| 17 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |
| 18 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Apr 2026 |
| 19 | M T W Oil Co | Terral, OK 73569 | Oil Operator | Jun 2014 |
| 20 | M&D Energy LLC | Moore, OK 73160 | Oil Operator | Apr 2026 |
| 21 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Jul 2026 |
| 22 | M-B SWD Inc | Crescent, OK 73028-0533 | Oil Operator | Jul 1997 |
| 23 | M-P Petroleum Inc | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 24 | M-S-C Corporation | Houston, TX 77027 | Oil Operator | May 1994 |
| 25 | M. M. & M. Resources, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2020 |
| 26 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 27 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Jul 2026 |
| 28 | Mac Engineering & Operating Co | | Oil & Gas Operator | May 2005 |
| 29 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 30 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | May 2026 |
| 31 | Mack Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Nov 2000 |
| 32 | Mackellar Inc | Oklahoma City, OK 73116-7101 | Oil & Gas Operator | May 2026 |
| 33 | Mackey Consulting & Leasing LLC | Cleveland, OK 74020 | Oil & Gas Operator | Mar 2026 |
| 34 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 35 | Macro Oil Company | Bartlesville, OK 74006 | Oil Operator | Aug 1999 |
| 36 | Madcap Resources, LLC | Edmond, OK 73013 | Gas Operator | Apr 2026 |
| 37 | Magaw & Zimmer | Perry, OK 73077-1055 | Oil & Gas Operator | Aug 2013 |
| 38 | Magellan Exploration Co LTD | Bethany, OK 73008-0909 | Oil & Gas Operator | Jun 2014 |
| 39 | Maggard Joe | Mannford, OK 74044 | Oil & Gas Operator | May 2023 |
| 40 | Maggard Oil Co Inc | Manford, OK 74044 | Oil & Gas Operator | Sep 1997 |
| 41 | Maggard Supply & Oil Company | Mannford, OK 74044-1407 | Oil & Gas Operator | Nov 2014 |
| 42 | Maggard VIrginia J | Mannford, OK 74044-3027 | Oil Operator | Apr 2026 |
| 43 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2026 |
| 44 | Magma Resources LLC | Paoli, OK 73074 | Oil & Gas Operator | Apr 2025 |
| 45 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 46 | Magnolia Petroleum Inc | Tulsa, OK 74106-2433 | Oil Operator | Jun 2018 |
| 47 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | May 2026 |
| 48 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 49 | Maguire James Q Inc | Norman, OK 73070-1748 | Oil & Gas Operator | Mar 2026 |
| 50 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 51 | Mahan, Janet L | | Oil & Gas Operator | Apr 2026 |
| 52 | Maier Resources Inc | Oklahoma City, OK 73157-2996 | Oil & Gas Operator | Mar 2015 |
| 53 | Maintainer Energy Res Corp Inc | Morris, OK 74445-2663 | Oil Operator | Apr 2026 |
| 54 | Majestic Energy Company LLC | Keifer, OK 74041 | Oil Operator | Apr 2026 |
| 55 | Majestic Energy Corporation | Shreveport, LA 71164 | Oil & Gas Operator | May 2013 |
| 56 | Majoil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1996 |
| 57 | Major Oil Co LLC | Drumright, OK 74030 | Oil & Gas Operator | May 2025 |
| 58 | Majors Eugene E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Apr 2026 |
| 59 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Dec 2025 |
| 60 | Majors Jimmy R | Osceola, NE 68651-0726 | Oil & Gas Operator | Sep 2000 |
| 61 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Apr 2026 |
| 62 | Majors Michael | Holdenville, OK 74848-0531 | Oil & Gas Operator | Sep 1994 |
| 63 | Majors, Linda K | | Oil Operator | Apr 2026 |
| 64 | Malka Production Company | Oklahoma City, OK 73101-0248 | Oil & Gas Operator | Jan 2000 |
| 65 | Mallard Oil & Gas | Cody, WY 82414-9640 | Oil & Gas Operator | Oct 2019 |
| 66 | Mallorn Energy LLC | Edmond, OK 73034 | Oil & Gas Operator | Mar 2026 |
| 67 | Maloney Helen V Dba Penn-Ok Corporation | Hockessin, DE 19707-9640 | Oil & Gas Operator | Feb 2026 |
| 68 | Malpais Inc | Prague, OK 74864 | Gas Operator | Apr 2026 |
| 69 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 70 | Malvern Group Inc | Clearwater, FL 33758-6817 | Oil & Gas Operator | Mar 2005 |
| 71 | Maly & Maly Oil | Beggs, OK 74421-2844 | Oil & Gas Operator | Apr 2026 |
| 72 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Apr 2026 |
| 73 | Manna Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Dec 2014 |
| 74 | Mantex Inc | Tulsa, OK 74114-6234 | Oil & Gas Operator | Mar 2015 |
| 75 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 76 | Mapco Production Co | Billings, MT 59102 | Oil & Gas Operator | Apr 1994 |
| 77 | Maple Properties Corp | Dallas, TX 75204 | Oil & Gas Operator | Jan 1999 |
| 78 | Mar-Bar Enterprises Inc | Cushing, OK 74023-3031 | Oil Operator | Apr 2026 |
| 79 | Marathon Oil Company LLC | Houston, TX 77079 | Oil & Gas Operator | May 2026 |
| 80 | Marbet LLC | Edmond, OK 73013-6691 | Oil & Gas Operator | May 2026 |
| 81 | Marco Oil Company | Sparta, KY 41086 | Oil Operator | Dec 2021 |
| 82 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Apr 2026 |
| 83 | Marcus Exploration Inc | Piedmont, OK 73078-0308 | Oil & Gas Operator | Dec 2000 |
| 84 | Mardale Drilling Company | Oklahoma City, OK 73157 | Oil Operator | Nov 1998 |
| 85 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 86 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 87 | Marion Energy Inc | Houston, TX 770082292 | Oil & Gas Operator | May 2015 |
| 88 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 89 | Marjo Operating Co., Inc. | Tulsa, OK 741010729 | Oil & Gas Operator | Apr 2026 |
| 90 | Marjo Operating Mid-Continent LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 91 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2026 |
| 92 | Mark Holloway Inc | Oklahoma City, OK 73107-6526 | Oil & Gas Operator | Apr 2026 |
| 93 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | May 2026 |
| 94 | Mark Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2018 |
| 95 | Markley Exploration | Bixby, OK 74008-5332 | Oil & Gas Operator | Jan 2014 |
| 96 | Markley L C Corporation | Fletcher, OK 73541 | Oil & Gas Operator | Aug 2002 |
| 97 | Marler Philip | Purcell, OK 73080-1522 | Oil & Gas Operator | Nov 2016 |
| 98 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 2026 |
| 99 | Marlin, Bruce W | | Oil Operator | Apr 2026 |
| 100 | Marlow Environmental LLC | Marlow, OK 73055 | Oil Operator | May 2022 |