| 6701 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 6702 | Marconi Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 1997 |
| 6703 | Marcum Drilling Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 6704 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Feb 2026 |
| 6705 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 6706 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 6707 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 6708 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Jun 2026 |
| 6709 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 6710 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Jun 2026 |
| 6711 | Marion County Prod. Co., L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 6712 | Maritech Resources, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2009 |
| 6713 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 6714 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 6715 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Feb 2026 |
| 6716 | Mark I Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 6717 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |
| 6718 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Mar 2026 |
| 6719 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | Feb 2025 |
| 6720 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 6721 | Market Street Energy, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Jun 2026 |
| 6722 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 6723 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jun 2026 |
| 6724 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jan 2025 |
| 6725 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 6726 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 6727 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Feb 2025 |
| 6728 | Marquee Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2026 |
| 6729 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 6730 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 6731 | Marrow, N. S. | Austin, TX 78703 | Oil & Gas Operator | Aug 2012 |
| 6732 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Feb 2026 |
| 6733 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 6734 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 6735 | Marshall Petroleum, Inc. | Houston, TX 77040 | Oil & Gas Operator | Aug 2003 |
| 6736 | Marshall Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 6737 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 6738 | Marshall, A. B. | Houston, TX 77050 | Oil & Gas Operator | Sep 1995 |
| 6739 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 6740 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Jun 2026 |
| 6741 | Marshco Production LLC | Colorado City, TX 79512 | Oil Operator | Jun 2026 |
| 6742 | Marshfield Oil & Gas, LLC | Houston, TX 77070 | Oil & Gas Operator | Jun 2026 |
| 6743 | Martex Oil & Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Jun 2026 |
| 6744 | Martin & Richards Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 1995 |
| 6745 | Martin Bros. Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 1993 |
| 6746 | Martin Cannon Interests, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 6747 | Martin Foree Operating II, LLC | Fate, TX 75132 | Oil & Gas Operator | Jun 2026 |
| 6748 | Martin Foree Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Jun 2026 |
| 6749 | Martin Gas Sales, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | May 1993 |
| 6750 | Martin Matrix Inc. | San Angelo, TX 76905 | Oil & Gas Operator | Jun 2026 |
| 6751 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Mar 2026 |
| 6752 | Martin Oil & Gas Inc. | Freer, TX 78357 | Oil & Gas Operator | Jun 2026 |
| 6753 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 6754 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Feb 2026 |
| 6755 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 6756 | Martin Well Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2015 |
| 6757 | Martin Well Service Company | Mineral Wells, TX 76067 | Oil & Gas Operator | Jul 2006 |
| 6758 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Jun 2026 |
| 6759 | Martin, John I. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 6760 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |
| 6761 | Martin, Tim | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2003 |
| 6762 | Martin, William C. | Houston, TX 77071 | Oil & Gas Operator | Jun 2026 |
| 6763 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 6764 | Martino, Joseph C. | Pasadena, TX 77504 | Oil & Gas Operator | Jun 2026 |
| 6765 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Jun 2026 |
| 6766 | Marwell Petroleum LTD Partnrship | Houston, TX 77027 | Oil & Gas Operator | Jun 2026 |
| 6767 | Marwell Petroleum, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2006 |
| 6768 | Marymac Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2001 |
| 6769 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 6770 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Jun 2026 |
| 6771 | Masada Development Company | Lubbock, TX 79416 | Oil & Gas Operator | Nov 2021 |
| 6772 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Jun 2026 |
| 6773 | Masada Oil & Gas Company LTD. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2026 |
| 6774 | Mascot Oil Company | Schulenburg, TX 78956 | Oil & Gas Operator | Jun 2026 |
| 6775 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 6776 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6777 | Massie Oil Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 6778 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 6779 | Masters Oil & Gas, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2026 |
| 6780 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 6781 | Masters Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2008 |
| 6782 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | Jun 2026 |
| 6783 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 6784 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 6785 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Oct 2024 |
| 6786 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 6787 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 6788 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Jun 2026 |
| 6789 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 6790 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Jun 2026 |
| 6791 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 6792 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Apr 2026 |
| 6793 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 6794 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 6795 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | Jun 2026 |
| 6796 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 6797 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 6798 | Maverick Mudlogging | Eagle Pass, TX 78852 | Oil & Gas Operator | Jun 2026 |
| 6799 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Jun 2026 |
| 6800 | Maverick Oil Company LLC | Pasadena, TX 77505 | Oil Operator | Jun 2026 |