| 1 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 2 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 3 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 4 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 5 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Jul 2025 |
| 7 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 8 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Sep 2025 |
| 9 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 10 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 11 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 12 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 13 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 14 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 15 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 16 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 17 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Sep 2025 |
| 18 | MCM Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2025 |
| 19 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 20 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 21 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 22 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Sep 2025 |
| 23 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 24 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 25 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 26 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 27 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 28 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 29 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 30 | Midenergy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2025 |
| 31 | Midkiff, John | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 32 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 33 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 34 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 35 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Sep 2025 |
| 36 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 37 | MLC Co., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 1996 |
| 38 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 39 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2025 |
| 40 | Mojave Operating Company | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 41 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Sep 2025 |
| 42 | Momentum Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 43 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Sep 2025 |
| 44 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 45 | Muleshoe Crude, LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 46 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 47 | Mulloy, J. W. Associates, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |
| 48 | Munn, W. H. Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2002 |
| 49 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | May 2024 |
| 50 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 51 | Murjo Oil & Royalty Company | Fort Worth, TX 76121 | Oil & Gas Operator | May 2025 |
| 52 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 53 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Sep 2025 |