| 6901 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 6902 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 6903 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 6904 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 6905 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | May 2024 |
| 6906 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 6907 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 6908 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | May 2024 |
| 6909 | Mercury Production Company | Fort Worth, TX 76113 | Gas Operator | Aug 2012 |
| 6910 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 6911 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 6912 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 6913 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 6914 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 6915 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 6916 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 6917 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Oct 2022 |
| 6918 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 6919 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 6920 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 6921 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2024 |
| 6922 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 6923 | Merit Oilfield Services | Buna, TX 77612 | Oil & Gas Operator | Mar 2023 |
| 6924 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 6925 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | May 2024 |
| 6926 | Merkin LLC | Austin, TX 78737 | Oil Operator | May 2024 |
| 6927 | Merlon Texas, Inc. | Houston, TX 77056 | Oil Operator | Jun 2013 |
| 6928 | Merrico Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2008 |
| 6929 | Merrill Operating, LLC | Snyder, TX 79550 | Oil Operator | Apr 2016 |
| 6930 | Merrimac Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 6931 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Mar 2024 |
| 6932 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | May 2024 |
| 6933 | Merritt, William Kevin | Dallas, TX 75225 | Oil & Gas Operator | Dec 1994 |
| 6934 | Merta, Mike | Alice, TX 78333 | Oil & Gas Operator | Aug 2005 |
| 6935 | Mertz Energy LLC | Houston, TX 77098 | Oil & Gas Operator | Jan 2024 |
| 6936 | Merzbacher, George F. Jr. | Robstown, TX 78380 | Oil & Gas Operator | May 1994 |
| 6937 | Mesa Chica Corp. | San Antonio, TX 78278 | Oil & Gas Operator | May 2018 |
| 6938 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 6939 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 6940 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 6941 | Mesa Ridge Holdings LLC | Abilene, TX 79603 | Oil Operator | May 2024 |
| 6942 | Mesa VIsta Operating, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2024 |
| 6943 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 6944 | Mesquite Land & Minerals Co. | Albany, TX 76430 | Oil Operator | May 2024 |
| 6945 | Mesquite Oil & Gas | Olney, TX 76374 | Oil & Gas Operator | May 2024 |
| 6946 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | May 2024 |
| 6947 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | May 2024 |
| 6948 | Messy Oil And Gas, LLC | Garwood, TX 77442 | Oil & Gas Operator | May 2024 |
| 6949 | Mestena Operating, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 6950 | Mestena Operating, LTD. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jun 2009 |
| 6951 | Mestena, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Nov 2001 |
| 6952 | Metano Energy III, LP | Tulsa, OK 74121 | Oil & Gas Operator | May 2024 |
| 6953 | Metano Energy, LP | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2008 |
| 6954 | Metco Oil Corporation | Seguin, TX 78155 | Oil Operator | Apr 2016 |
| 6955 | Metis Energy LLC | Friendswood, TX 77546 | Oil & Gas Operator | May 2024 |
| 6956 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 6957 | Metroplex Barnett Shale LLC | Houston, TX 77001 | Gas Operator | Sep 2008 |
| 6958 | Metzner, Norma J. Estate | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1998 |
| 6959 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | May 2024 |
| 6960 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 6961 | Mextex Operating Company | Austin, TX 78734 | Oil & Gas Operator | May 2024 |
| 6962 | Meyer Oil Co., Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Feb 2024 |
| 6963 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Dec 2023 |
| 6964 | MFP Petroleum LTD. Partnership | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2017 |
| 6965 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Feb 2024 |
| 6966 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 6967 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 6968 | MGM Oil & Gas Inc. | Ballinger, TX 76821 | Oil & Gas Operator | May 2024 |
| 6969 | MGM Well Service, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2004 |
| 6970 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 6971 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | May 2024 |
| 6972 | Mi-Co Oil & Gas LLC | Caddo, TX 76429 | Oil Operator | May 2024 |
| 6973 | Miami Oil Producers Inc | Reno, NV 89501 | Oil & Gas Operator | Dec 2012 |
| 6974 | Michael Petr. & Hurd Ent., LTD. | Houston, TX 77056 | Oil & Gas Operator | Oct 1993 |
| 6975 | Michael Petroleum Corporation | Houston, TX 77040 | Oil & Gas Operator | Dec 2001 |
| 6976 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | May 2024 |
| 6977 | Micro Operating, Inc. | Bryan, TX 77807 | Oil & Gas Operator | May 2024 |
| 6978 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 2024 |
| 6979 | Mid Texas Natural Gas | Kyle, TX 78640 | Oil & Gas Operator | May 2019 |
| 6980 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 6981 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2024 |
| 6982 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2024 |
| 6983 | Mid-Continent Energy, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2020 |
| 6984 | Mid-Continental Exploration,Inc. | Sanger, TX 76266 | Oil & Gas Operator | May 2024 |
| 6985 | Mid-Gulf, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Mar 2008 |
| 6986 | Mid-States Operating Company | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 6987 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 6988 | Mid-Tex Operating, Inc. | Austin, TX 78748 | Oil & Gas Operator | May 2024 |
| 6989 | Mid-Tex Resources | Merkel, TX 79536 | Oil & Gas Operator | Feb 2001 |
| 6990 | Midas Resources, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2024 |
| 6991 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 6992 | Midcon Offshore, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 6993 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 6994 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 6995 | Middleton Oil Company | Houston, TX 77006 | Oil & Gas Operator | May 2024 |
| 6996 | Mideast Gas Systems, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2005 |
| 6997 | Midenergy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | May 2024 |
| 6998 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 6999 | Midkiff, John | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 7000 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |