| 1 | M & A Oil Company, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 2 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Jul 2025 |
| 3 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Oct 2025 |
| 4 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Oct 2025 |
| 5 | Maddox Operating | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 6 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Oct 2025 |
| 7 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Oct 2025 |
| 8 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 9 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 10 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 11 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 12 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 13 | Marchman, J. E. | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 14 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 15 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 16 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 17 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 18 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 19 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |
| 20 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Oct 2025 |
| 21 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 22 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 23 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 24 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 25 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 26 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 27 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Oct 2025 |
| 28 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 29 | McCauley Production | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 30 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 31 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 32 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 33 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 34 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 35 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 36 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 37 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 38 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 39 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 40 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Oct 2025 |
| 41 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2025 |
| 42 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 43 | Midnite Oil Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 44 | Midwestern Energy | Mankato, MN 56003 | Oil & Gas Operator | Oct 2025 |
| 45 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 46 | MMD Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2000 |
| 47 | Mole Hole Prod. | Bridgeport, TX 76426 | Oil Operator | Oct 2025 |
| 48 | Moller, Herbert T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 49 | Morgan, C. V. Partnership | Olney, TX 76374 | Oil & Gas Operator | Jan 2009 |
| 50 | Morton, J. V. Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |
| 51 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 52 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 53 | MSB Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 54 | Mullin, W. B. | Graham, TX 76450 | Oil & Gas Operator | Sep 1998 |
| 55 | Mullins, Manuel | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 56 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |