| 7001 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Mar 2025 |
| 7002 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 7003 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Mar 2025 |
| 7004 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 7005 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 7006 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 7007 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Mar 2025 |
| 7008 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Mar 2025 |
| 7009 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 7010 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 7011 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 7012 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Dec 2024 |
| 7013 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 7014 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 7015 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 7016 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 7017 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Mar 2025 |
| 7018 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 7019 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Mar 2025 |
| 7020 | McGuffin, Joe S. Inc. | Mathis, TX 78368 | Gas Operator | Mar 2025 |
| 7021 | McGuire Brothers | Phoenix, AZ 85045 | Oil & Gas Operator | Mar 2025 |
| 7022 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Mar 2025 |
| 7023 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 7024 | McKay Oil | Portales, NM 88130 | Oil & Gas Operator | Apr 1996 |
| 7025 | McKay Operating LLC | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2023 |
| 7026 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 7027 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 7028 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 7029 | McKenzie Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 7030 | McKenzie Production Company | Houston, TX 77063 | Oil & Gas Operator | May 1995 |
| 7031 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 7032 | McKinney, M. H. | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 7033 | McKnight, C. L. | McLeod, TX 75565 | Oil & Gas Operator | Mar 2025 |
| 7034 | McKnight, C. L. Oil Co. LLP | McLeod, TX 75565 | Oil & Gas Operator | Mar 2025 |
| 7035 | McKnight, J. C. | Jefferson, TX 75657 | Oil & Gas Operator | Nov 2019 |
| 7036 | McLain Exploration, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2008 |
| 7037 | McLelland Engineering & MGMT. | Houston, TX 77042 | Oil & Gas Operator | Mar 1999 |
| 7038 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Mar 2025 |
| 7039 | McLeod, George L. Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2002 |
| 7040 | MCM Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 7041 | McMahon Operating Co., L.C. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2004 |
| 7042 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 7043 | McMahon-Bullington LP | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2009 |
| 7044 | McMinn Operating Company, Inc. | Hempstead, TX 77445 | Oil & Gas Operator | Mar 2025 |
| 7045 | McMoran Oil & Gas LLC | New Orleans, LA 70160 | Oil & Gas Operator | Oct 2021 |
| 7046 | McMullan Oil Company | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2023 |
| 7047 | McMurrey, R. J., Production Comp | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 7048 | McNallen & Griffin | Keller, TX 76244 | Oil & Gas Operator | Mar 2025 |
| 7049 | McNallen Oil Co., Inc. | Keller, TX 76244 | Oil & Gas Operator | Mar 2025 |
| 7050 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 7051 | McOsker Bros., Inc. | San Antonio, TX 78264 | Oil & Gas Operator | Aug 2003 |
| 7052 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 7053 | MCR Operating Group | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 7054 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 7055 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 7056 | McRae, Nathan Rathburn | Hebbronville, TX 78361 | Oil & Gas Operator | Apr 1994 |
| 7057 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 7058 | MCZ, Inc. | Houston, TX 77026 | Oil & Gas Operator | Sep 1990 |
| 7059 | MD America Energy, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 7060 | MDC Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2022 |
| 7061 | MDC Texas Operator LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 7062 | MDF Oil Company | Floresville, TX 78114 | Oil Operator | Mar 2025 |
| 7063 | MDM Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Mar 2025 |
| 7064 | Me-Tex Oil & Gas, Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 2025 |
| 7065 | Me-Tex Supply Company | Hobbs, NM 88240 | Oil & Gas Operator | Jun 1993 |
| 7066 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 7067 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Jan 2025 |
| 7068 | Meador Enterprises, Inc. | Kilgore, TX 75662 | Oil Operator | Oct 2023 |
| 7069 | Meador, John E. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2014 |
| 7070 | Meador, T. C. | San Angelo, TX 76902 | Oil & Gas Operator | Mar 2025 |
| 7071 | Meadows Oil Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2004 |
| 7072 | Means Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2013 |
| 7073 | Means Oil Company, LLC | Corsicana, TX 75110 | Oil & Gas Operator | Mar 2025 |
| 7074 | Means, Frank L. | Corsicana, TX 75110 | Oil & Gas Operator | Jan 2001 |
| 7075 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 7076 | Meb, LLC | Austin, TX 78737 | Oil Operator | Mar 2025 |
| 7077 | Meco IV Holdco, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2022 |
| 7078 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 7079 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 7080 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 7081 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 7082 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 7083 | Medallion Production Company | Tulsa, OK 74103 | Oil & Gas Operator | May 1997 |
| 7084 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2025 |
| 7085 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 7086 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 7087 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 7088 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 7089 | Megg, L.P. | Borger, TX 79007 | Oil & Gas Operator | Mar 2025 |
| 7090 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Mar 2025 |
| 7091 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Mar 2025 |
| 7092 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 7093 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Mar 2025 |
| 7094 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Mar 2025 |
| 7095 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 7096 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 7097 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 7098 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 7099 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 7100 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |