| 7001 | Martin, Tim | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2003 |
| 7002 | Martin, William C. | Houston, TX 77071 | Oil & Gas Operator | Feb 2026 |
| 7003 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 7004 | Martino, Joseph C. | Pasadena, TX 77504 | Oil & Gas Operator | Feb 2026 |
| 7005 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Feb 2026 |
| 7006 | Marwell Petroleum LTD Partnrship | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 7007 | Marwell Petroleum, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2006 |
| 7008 | Marymac Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2001 |
| 7009 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 7010 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Feb 2026 |
| 7011 | Masada Development Company | Lubbock, TX 79416 | Oil & Gas Operator | Nov 2021 |
| 7012 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Feb 2026 |
| 7013 | Masada Oil & Gas Company LTD. | Abilene, TX 79603 | Oil & Gas Operator | Feb 2026 |
| 7014 | Mascot Oil Company | Schulenburg, TX 78956 | Oil & Gas Operator | Feb 2026 |
| 7015 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 7016 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 7017 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 7018 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 7019 | Masters Oil & Gas, LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |
| 7020 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 7021 | Masters Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2008 |
| 7022 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2026 |
| 7023 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 7024 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 7025 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Oct 2024 |
| 7026 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 7027 | Matagorda Operating Company | Kilgore, TX 75663 | Gas Operator | Nov 2005 |
| 7028 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 7029 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Feb 2026 |
| 7030 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 7031 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Feb 2026 |
| 7032 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 7033 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Dec 2025 |
| 7034 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 7035 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 7036 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 7037 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 7038 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 7039 | Maverick Mudlogging | Eagle Pass, TX 78852 | Oil Operator | Feb 2026 |
| 7040 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Feb 2026 |
| 7041 | Maverick Oil Company LLC | Pasadena, TX 77505 | Oil Operator | Feb 2026 |
| 7042 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 7043 | Maverick Permian LLC | Keithville, LA 71047 | Oil & Gas Operator | Feb 2026 |
| 7044 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 7045 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 7046 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 7047 | Maxey & Swan Oil Co. | Decatur, TX 76234 | Oil & Gas Operator | Apr 2007 |
| 7048 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Nov 2025 |
| 7049 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 7050 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 7051 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 7052 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 7053 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 7054 | Maxwell Resources Corporation | Oklahoma City, OK 73159 | Oil & Gas Operator | Apr 2009 |
| 7055 | Maxwell, J. K. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 1995 |
| 7056 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 7057 | Maxwell, Riley G., Co. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 7058 | May Investments, Inc. | New Boston, TX 75570 | Oil & Gas Operator | Aug 2003 |
| 7059 | May Oil & Gas | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 7060 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Feb 2026 |
| 7061 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 7062 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Feb 2026 |
| 7063 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Feb 2026 |
| 7064 | Mayjac I, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 7065 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 7066 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 7067 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 7068 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | Feb 2026 |
| 7069 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Feb 2026 |
| 7070 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 7071 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 7072 | Mays Enterprises, Inc. | Mineral Wells, TX 76067 | Gas Operator | Oct 2010 |
| 7073 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | Feb 2026 |
| 7074 | Mazel Oil & Gas Co. | Austin, TX 78768 | Gas Operator | Jan 1994 |
| 7075 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | Feb 2026 |
| 7076 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 7077 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 7078 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 7079 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 7080 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Feb 2026 |
| 7081 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Aug 2025 |
| 7082 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 7083 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | Feb 2026 |
| 7084 | McAlester Fuel Co. | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 7085 | McAlmond Oil Company | Fort Worth, TX 76136 | Oil & Gas Operator | Apr 2022 |
| 7086 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 7087 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 7088 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 7089 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | Feb 2026 |
| 7090 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 7091 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 7092 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 7093 | McBride Production Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1993 |
| 7094 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 7095 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 7096 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | Feb 2026 |
| 7097 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 7098 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 7099 | McCarter, A. Nelson | Houston, TX 77063 | Oil & Gas Operator | Aug 2003 |
| 7100 | McCarter, W. B. Jr. | Houston, TX 77063 | Oil & Gas Operator | Feb 2002 |