| 6901 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 6902 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Jun 2026 |
| 6903 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 6904 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 6905 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 6906 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Jun 2026 |
| 6907 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Jun 2026 |
| 6908 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 6909 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 6910 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 6911 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Feb 2026 |
| 6912 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 6913 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 6914 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 6915 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 6916 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Jun 2026 |
| 6917 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 6918 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Jun 2026 |
| 6919 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Jun 2026 |
| 6920 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 6921 | McKay Oil | Portales, NM 88130 | Oil & Gas Operator | Apr 1996 |
| 6922 | McKay Operating LLC | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2023 |
| 6923 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 6924 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 6925 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 6926 | McKenzie Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 6927 | McKenzie Production Company | Houston, TX 77063 | Oil & Gas Operator | May 1995 |
| 6928 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 6929 | McKinney, M. H. | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 6930 | McKnight, C. L. | McLeod, TX 75565 | Oil & Gas Operator | Jun 2026 |
| 6931 | McKnight, C. L. Oil Co. LLP | McLeod, TX 75565 | Oil & Gas Operator | Jun 2026 |
| 6932 | McKnight, J. C. | Jefferson, TX 75657 | Oil & Gas Operator | Nov 2019 |
| 6933 | McLain Exploration, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2008 |
| 6934 | McLelland Engineering & MGMT. | Houston, TX 77042 | Oil & Gas Operator | Mar 1999 |
| 6935 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2026 |
| 6936 | McLeod, George L. Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2002 |
| 6937 | MCM Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 6938 | McMahon Operating Co., L.C. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2004 |
| 6939 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 6940 | McMahon-Bullington LP | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2009 |
| 6941 | McMinn Operating Company, Inc. | Hempstead, TX 77445 | Oil & Gas Operator | Jun 2026 |
| 6942 | McMoran Oil & Gas LLC | New Orleans, LA 70160 | Oil & Gas Operator | Oct 2021 |
| 6943 | McMullan Oil Company | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2023 |
| 6944 | McMurrey, R. J., Production Comp | Tyler, TX 75711 | Oil & Gas Operator | Jun 2026 |
| 6945 | McNallen & Griffin | Keller, TX 76244 | Oil & Gas Operator | Jun 2026 |
| 6946 | McNallen Oil Co., Inc. | Keller, TX 76244 | Oil & Gas Operator | Jun 2026 |
| 6947 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 6948 | McOsker Bros., Inc. | San Antonio, TX 78264 | Oil & Gas Operator | Aug 2003 |
| 6949 | McPhaul, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2026 |
| 6950 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 6951 | MCR Operating Group | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2026 |
| 6952 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 6953 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 6954 | McRae, Nathan Rathburn | Hebbronville, TX 78361 | Oil & Gas Operator | Apr 1994 |
| 6955 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 6956 | MCZ, Inc. | Houston, TX 77026 | Oil & Gas Operator | Sep 1990 |
| 6957 | MD America Energy, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 6958 | MDC Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2022 |
| 6959 | MDC Texas Operator LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 6960 | MDF Oil Company | Floresville, TX 78114 | Oil Operator | Jun 2026 |
| 6961 | MDM Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Jun 2026 |
| 6962 | Me-Tex Oil & Gas, Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Jun 2026 |
| 6963 | Me-Tex Supply Company | Hobbs, NM 88240 | Oil & Gas Operator | Jun 1993 |
| 6964 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 6965 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Feb 2026 |
| 6966 | Meador Enterprises, Inc. | Kilgore, TX 75662 | Oil Operator | Oct 2023 |
| 6967 | Meador, John E. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2014 |
| 6968 | Meador, T. C. | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2026 |
| 6969 | Meadows Oil Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2004 |
| 6970 | Means Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2013 |
| 6971 | Means Oil Company, LLC | Corsicana, TX 75110 | Oil & Gas Operator | Jun 2026 |
| 6972 | Means, Frank L. | Corsicana, TX 75110 | Oil & Gas Operator | Jan 2001 |
| 6973 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 6974 | Meb, LLC | Austin, TX 78737 | Oil Operator | Jun 2026 |
| 6975 | Meco IV Holdco, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2022 |
| 6976 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 6977 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 6978 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 6979 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 6980 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 6981 | Medallion Production Company | Tulsa, OK 74103 | Oil & Gas Operator | May 1997 |
| 6982 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 6983 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 6984 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 6985 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 6986 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 6987 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 6988 | Megg, L.P. | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 6989 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Jun 2026 |
| 6990 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Jun 2026 |
| 6991 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 6992 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Jun 2026 |
| 6993 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Jun 2026 |
| 6994 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 6995 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6996 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 6997 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 6998 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 6999 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 7000 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |