| 1 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Oct 2025 |
| 2 | Mac Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2023 |
| 3 | Maddox Operating | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 4 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Oct 2025 |
| 5 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 6 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 7 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 8 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 9 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 10 | Mammoth Operating LLC | Spicewood, TX 78669 | Oil Operator | Oct 2025 |
| 11 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 12 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 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 Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 18 | Martin Bros. Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 1993 |
| 19 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 20 | Martin Well Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2015 |
| 21 | Martin, John I. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 22 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |
| 23 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 24 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Oct 2025 |
| 25 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 26 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 27 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 28 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Oct 2025 |
| 29 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 30 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Oct 2025 |
| 31 | McCauley Production | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 32 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 33 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 34 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 35 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 36 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 37 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 38 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 39 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 40 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 41 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 42 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 43 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 44 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 45 | Mesquite Oil & Gas | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 46 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 47 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 48 | Mi-Co Oil & Gas LLC | Caddo, TX 76429 | Oil Operator | Oct 2025 |
| 49 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 50 | Miller, C. R. Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 51 | Mitchell Drilling Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 52 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 53 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 54 | Mitchell Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 55 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 56 | MMD Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2000 |
| 57 | Mogul Resources, LLC | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 58 | Mole Hole Prod. | Bridgeport, TX 76426 | Oil Operator | Oct 2025 |
| 59 | Momentum Oil Company | Albany, TX 76430 | Oil & Gas Operator | May 2003 |
| 60 | Monarch Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 61 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 62 | Moore, Stephen Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2002 |
| 63 | Morgan, C. V. Partnership | Olney, TX 76374 | Oil & Gas Operator | Jan 2009 |
| 64 | Moriah Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Mar 2008 |
| 65 | Mortimer Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2003 |
| 66 | Mortimer Production Company | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 67 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 68 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 69 | Mosman Operating, LLC | Dallas, TX 75204 | Oil Operator | Oct 2025 |
| 70 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 71 | Mueller Engineering Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Feb 2002 |
| 72 | Mullin, W. B. | Graham, TX 76450 | Oil & Gas Operator | Sep 1998 |
| 73 | Mullins, Manuel | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 74 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |