| 1 | M & A Oil Company, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 2 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 3 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Oct 2025 |
| 4 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Oct 2025 |
| 5 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 6 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Oct 2025 |
| 7 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 8 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 9 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Oct 2025 |
| 10 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Oct 2025 |
| 11 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Oct 2025 |
| 12 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 13 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 14 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 15 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 16 | McCauley Production | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 17 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | Oct 2025 |
| 18 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 19 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 20 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 21 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 22 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 23 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 24 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 25 | Midnite Oil Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 26 | Midwestern Energy | Mankato, MN 56003 | Oil & Gas Operator | Oct 2025 |
| 27 | Miller, L. Joe & Bobby J. Parker | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2000 |
| 28 | Mink, Jay, Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Aug 2017 |
| 29 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 30 | Mitchell Drilling Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 31 | Mitchell Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 32 | MJB Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 33 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 34 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 35 | Moenning, Vernie | Electra, TX 76360 | Oil & Gas Operator | Oct 2025 |
| 36 | Mogul Operating LLC | St Petersburg, FL 33706 | Oil Operator | Oct 2025 |
| 37 | Moller, Herbert T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 38 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 39 | Moore Energy Services, LLC | Iowa Park, TX 76367 | Oil Operator | Mar 2024 |
| 40 | Morton, J. V. Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |
| 41 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Oct 2025 |
| 42 | MSB Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 43 | Muller Oil & Gas | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 44 | Mullin, W. B. | Graham, TX 76450 | Oil & Gas Operator | Sep 1998 |