| 1 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 2 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 3 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Dec 2024 |
| 4 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 5 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 6 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 7 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2024 |
| 8 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 9 | Marwell Petroleum LTD Partnrship | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
| 10 | Masada Development Company | Lubbock, TX 79416 | Oil & Gas Operator | Nov 2021 |
| 11 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 12 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 13 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2024 |
| 14 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 15 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 16 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 17 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 18 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 19 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 20 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Dec 2024 |
| 21 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Dec 2024 |
| 22 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 23 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 24 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 25 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 26 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Dec 2024 |
| 27 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 28 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 29 | Mist Prod. & Exploration Corp. | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 30 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 31 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Dec 2024 |
| 32 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Dec 2024 |
| 33 | Molly Oil & Gas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2024 |
| 34 | Moriah Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 35 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 36 | Munn, W. H. Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2002 |
| 37 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |