| 1 | M & P Exploration, Inc. | | Gas Operator | Nov 2017 |
| 2 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 3 | Mackinaw Two, LLC | | Oil & Gas Operator | May 2020 |
| 4 | Macquarie Longview Acquisitions, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2008 |
| 5 | Magnolia Petrolrum Company | | Oil Operator | Aug 2005 |
| 6 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 7 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Feb 2024 |
| 8 | Marshall Crude Oil LLC | Crossett, AR 71635 | Oil Operator | Jan 2024 |
| 9 | Marshall, David | | Oil Operator | Oct 2021 |
| 10 | Martin, Trey Oil Company | Louann, AR 71751 | Oil Operator | Feb 2024 |
| 11 | Martin, Van Jr | | Oil & Gas Operator | Feb 2024 |
| 12 | Martinez, Carlos And Cori And McAdams, Buddy | El Dorado, AR 71730 | Oil Operator | Jan 2024 |
| 13 | Max Extract Technologies, LLC | Oklahoma City, OK 73105 | Gas Operator | Dec 2023 |
| 14 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 15 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 16 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 17 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Apr 2024 |
| 18 | Medg, LLC | Stephens, AR 71764 | Oil Operator | Feb 2024 |
| 19 | Meeks, Mike | El Dorado, AR 71730 | Oil Operator | Mar 2024 |
| 20 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jan 2024 |
| 21 | Milam Oil Corp Dba Milam Construction | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2024 |
| 22 | Miller Production | Bossier City, LA 7111 | Oil & Gas Operator | Feb 2024 |
| 23 | Miller Production Co. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 24 | Miller, R. A. Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2023 |
| 25 | Mills Resource Services LLC | Hope, AR 71801 | Oil Operator | Dec 2023 |
| 26 | Mission Creek Opco, LLC | Magnolia, AR 71753 | Oil & Gas Operator | Feb 2024 |
| 27 | MMGK Arkoma, LLC | Dallas, TX 75240 | Gas Operator | Jan 2024 |
| 28 | Morgan Oil & Gas Operating LLC | Junction City, AR 71749 | Oil Operator | Mar 2024 |
| 29 | Mueller, Thomas C Inc | | Gas Operator | Dec 2004 |
| 30 | Mueller, Thomas C, Of Crawford County Inc | | Gas Operator | Dec 2004 |
| 31 | Mulberry Oil & Gas, LLC | Mulberry, AR 72947 | Gas Operator | Jan 2024 |
| 32 | Muras Energy, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Dec 2023 |
| 33 | Murphy Exploration & Production | Houston, TX 77024 | Oil Operator | Feb 2024 |