| 1 | M & K Operating LLC | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 2 | M & M Oil & Gas Exploration Inc | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 3 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 4 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Feb 2026 |
| 5 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 6 | Magnet Oil LP | Bronte, TX 76933 | Oil & Gas Operator | Feb 2026 |
| 7 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 8 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Feb 2026 |
| 9 | Masada Oil & Gas Company LTD. | Abilene, TX 79603 | Oil & Gas Operator | Feb 2026 |
| 10 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 11 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 12 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 13 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 14 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Aug 2025 |
| 15 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 16 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 17 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 18 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 19 | Mercury Exploration Co. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 20 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Feb 2026 |
| 21 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 22 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | Feb 2026 |
| 23 | Mesa Operating, LLC | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 24 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 25 | Mid Texas Natural Gas | Kyle, TX 78640 | Oil & Gas Operator | May 2019 |
| 26 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | Feb 2026 |
| 27 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 28 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 29 | Midsco | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 30 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 31 | Miller, Donny | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 32 | Miller, Rex M. | Putnam, TX 76469 | Oil & Gas Operator | Sep 2022 |
| 33 | Mingus Oil & Gas | Mingus, TX 76463 | Oil & Gas Operator | Feb 2026 |
| 34 | Misener Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2010 |
| 35 | Mission Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 36 | Mist Prod. & Exploration Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 37 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 38 | Mixon, Robert N. | Lometa, TX 76853 | Oil & Gas Operator | Feb 2026 |
| 39 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 40 | MKS Consulting Corporation | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2005 |
| 41 | MKS Natural Gas Company | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2016 |
| 42 | Mogul Resources, LLC | Cisco, TX 76437 | Oil & Gas Operator | Feb 2026 |
| 43 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 44 | Montgomery Royalty | Moran, TX 76464 | Oil & Gas Operator | Feb 2026 |
| 45 | Moore Investment Co. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 46 | Moore, Miles Inc. | Moran, TX 76464 | Oil & Gas Operator | Feb 2026 |
| 47 | Morris Operating Co | Lovington, NM 88260 | Oil & Gas Operator | Feb 2026 |
| 48 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Feb 2026 |
| 49 | Morrison DRLG. & Prod. Co., Inc. | Abilene, TX 79606 | Oil & Gas Operator | Nov 2008 |
| 50 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Feb 2026 |
| 51 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 52 | Munson, E. P., Jr. | Fort Worth, TX 76121 | Oil & Gas Operator | Oct 1995 |
| 53 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Feb 2026 |