| 1 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 2 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Mar 2025 |
| 3 | Majestic Petroleum Services LLC | Midland, TX 79705 | Oil Operator | Mar 2025 |
| 4 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 5 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 6 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 7 | Maple Energy Holdings, LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2023 |
| 8 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 9 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 10 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 11 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 12 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2025 |
| 13 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 14 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 15 | Mayjac I, LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 16 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 17 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 18 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 19 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Mar 2025 |
| 20 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 21 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 22 | McKinney, M. H. | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 23 | MDC Texas Operator LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 24 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 25 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 26 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 27 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 28 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 29 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Mar 2025 |
| 30 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 31 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 32 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 33 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 34 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 35 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 36 | Mills, Pete | Midland, TX 79707 | Oil & Gas Operator | Sep 2005 |
| 37 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 38 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2025 |
| 39 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 40 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 41 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 42 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 43 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 44 | Moss, William Corp. | Dallas, TX 75219 | Oil & Gas Operator | Oct 2002 |
| 45 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 46 | MTBB Acquisition Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2022 |
| 47 | Muleshoe Crude, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 48 | Murjo Oil & Royalty Company | Fort Worth, TX 76121 | Oil & Gas Operator | Nov 2024 |
| 49 | Murphree Energy, Inc. | Monahans, TX 79756 | Oil Operator | Nov 2024 |
| 50 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |