| 1 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2025 |
| 2 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 3 | M.A.R.S. Energy | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 4 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Mar 2025 |
| 5 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 6 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 7 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 8 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 9 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 10 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 11 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 12 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Jan 2025 |
| 13 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 14 | Martin Foree Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Mar 2025 |
| 15 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 16 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 17 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 18 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 19 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2025 |
| 20 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 21 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 22 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | Mar 2025 |
| 23 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 24 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 25 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 26 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Mar 2025 |
| 27 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2025 |
| 28 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 29 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 30 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 31 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Mar 2025 |
| 32 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Mar 2025 |
| 33 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Mar 2025 |
| 34 | McLeod, George L. Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2002 |
| 35 | MDC Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2022 |
| 36 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 37 | Meco IV Holdco, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2022 |
| 38 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 39 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 40 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 41 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 42 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 43 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 44 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 45 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 46 | Merrill Operating, LLC | Snyder, TX 79550 | Oil Operator | Apr 2016 |
| 47 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 48 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Mar 2025 |
| 49 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 50 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 51 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Nov 2024 |
| 52 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 53 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 54 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 55 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 56 | Millennium Resources, LLC. | Big Lake, TX 76932 | Oil & Gas Operator | Sep 2012 |
| 57 | Millennium Resources, LP | Midland, TX 79708 | Oil Operator | Mar 2025 |
| 58 | Mills, Pete | Midland, TX 79707 | Oil & Gas Operator | Sep 2005 |
| 59 | Miltex Oil Company | Boerne, TX 78006 | Oil & Gas Operator | Mar 2025 |
| 60 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 61 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2025 |
| 62 | Minute Hand LLC | Brenham, TX 77834 | Oil & Gas Operator | Mar 2025 |
| 63 | MLC Operating, LP | Houston, TX 77063 | Oil & Gas Operator | Mar 2025 |
| 64 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Mar 2025 |
| 65 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 66 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 67 | Molder, Tom | Imperial, TX 79743 | Oil & Gas Operator | Mar 2025 |
| 68 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 69 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 70 | Mongoose Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Mar 2025 |
| 71 | Montex Drilling Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 72 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 73 | Moonlite Oil & Gas Company | Imperial, TX 79743 | Oil & Gas Operator | Mar 2025 |
| 74 | Moore & Gilmore | Midland, TX 79701 | Oil & Gas Operator | Oct 2008 |
| 75 | Moriah Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 76 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 77 | Morningstar Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2022 |
| 78 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Mar 2025 |
| 79 | Mosaic Midland LLC | Dallas, TX 75367 | Oil Operator | Mar 2025 |
| 80 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Mar 2025 |
| 81 | Mosaic Pecos LLC | Dallas, TX 75367 | Oil Operator | Mar 2025 |
| 82 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Mar 2025 |
| 83 | Moy, Gary | Falls City, TX 78113 | Oil & Gas Operator | Nov 1998 |
| 84 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 85 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 86 | Munn, W. H. Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2002 |
| 87 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 88 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Nov 2024 |
| 89 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 90 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 91 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 92 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | Mar 2025 |
| 93 | MZ Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |