| 6601 | Mark L Shidler, Inc. | Houston, TX 77055 | Oil & Gas Operator | Jan 2024 |
| 6602 | Mark Oil, Inc. | Chanute, KS 66720 | Oil Operator | May 2023 |
| 6603 | Markay Oil & Gas Company | Midland, TX 79701 | Oil & Gas Operator | Sep 1998 |
| 6604 | Market Street Energy, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Apr 2024 |
| 6605 | Marlin Energy Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | May 2018 |
| 6606 | Marlin Energy Southwest GP, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Apr 2024 |
| 6607 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jan 2024 |
| 6608 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 6609 | Marmik Oil Company | El Dorado, AR 71730 | Oil & Gas Operator | Jan 2015 |
| 6610 | Maroon Energy LLC | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 6611 | Marquee Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 6612 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 6613 | Marr, M. H. | Dallas, TX 75201 | Gas Operator | Jan 2002 |
| 6614 | Marrow, N. S. | Austin, TX 78703 | Oil & Gas Operator | Aug 2012 |
| 6615 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Dec 2023 |
| 6616 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 6617 | Marshall Energy, Inc. | Dallas, TX 75243 | Oil & Gas Operator | May 1997 |
| 6618 | Marshall Petroleum, Inc. | Houston, TX 77040 | Oil & Gas Operator | Aug 2003 |
| 6619 | Marshall Pipe & Supply Co. | Nocona, TX 76255 | Oil & Gas Operator | Mar 2008 |
| 6620 | Marshall R. Young Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 6621 | Marshall, A. B. | Houston, TX 77050 | Oil & Gas Operator | Sep 1995 |
| 6622 | Marshall, Sam | Granbury, TX 76048 | Oil & Gas Operator | Aug 2010 |
| 6623 | Marshall, Samuel Meek, Estate Of | Granbury, TX 76048 | Oil & Gas Operator | Apr 2024 |
| 6624 | Marshco Production LLC | Colorado City, TX 79512 | Oil Operator | Apr 2024 |
| 6625 | Marshfield Oil & Gas, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2024 |
| 6626 | Martex Oil & Gas, Inc. | Estes Park, CO 80517 | Oil & Gas Operator | Apr 2024 |
| 6627 | Martin & Richards Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 1995 |
| 6628 | Martin Bros. Oil | Graham, TX 76450 | Oil & Gas Operator | Dec 1993 |
| 6629 | Martin Cannon Interests, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 6630 | Martin Foree Operating II, LLC | Royse City, TX 75189 | Oil & Gas Operator | Apr 2024 |
| 6631 | Martin Foree Operating, LLC | Royse City, TX 75189 | Oil & Gas Operator | Apr 2024 |
| 6632 | Martin Gas Sales, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | May 1993 |
| 6633 | Martin Matrix Inc. | San Angelo, TX 76905 | Oil & Gas Operator | Apr 2024 |
| 6634 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Jan 2024 |
| 6635 | Martin Oil & Gas Inc. | Freer, TX 78357 | Oil & Gas Operator | Apr 2024 |
| 6636 | Martin Oil Co. | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2023 |
| 6637 | Martin Oil LLC | Madison, KS 66860 | Oil Operator | Dec 2023 |
| 6638 | Martin Petroleum Corp. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 6639 | Martin Well Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2015 |
| 6640 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2024 |
| 6641 | Martin, John I. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 6642 | Martin, Pat Jr. | Archer City, TX 76351 | Oil & Gas Operator | Dec 2019 |
| 6643 | Martin, Tim | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2003 |
| 6644 | Martin, William C. | Houston, TX 77071 | Oil & Gas Operator | Apr 2024 |
| 6645 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 6646 | Martino, Joseph C. | Pasadena, TX 77504 | Oil & Gas Operator | Apr 2024 |
| 6647 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Apr 2024 |
| 6648 | Marwell Petroleum LTD Partnrship | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 6649 | Marwell Petroleum, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2006 |
| 6650 | Marymac Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Sep 2001 |
| 6651 | Mas Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 6652 | Masa Energy LLC | Houston, TX 77094 | Oil & Gas Operator | Apr 2024 |
| 6653 | Masada Development Company | Lubbock, TX 79416 | Oil & Gas Operator | Nov 2021 |
| 6654 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Apr 2024 |
| 6655 | Masada Oil & Gas Company LTD. | Abilene, TX 79603 | Oil & Gas Operator | Apr 2024 |
| 6656 | Mascot Oil Company | Schulenburg, TX 78956 | Oil & Gas Operator | Apr 2024 |
| 6657 | Mash Oilfield Services, LP | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 6658 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 6659 | Massie Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 6660 | Massingill & McCutchin | Lubbock, TX 79424 | Oil & Gas Operator | Aug 2003 |
| 6661 | Masters Oil & Gas, LLC | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |
| 6662 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 6663 | Masters Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2008 |
| 6664 | Mastodon Operating Company, LLC | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 6665 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 6666 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 6667 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Apr 2024 |
| 6668 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 6669 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 6670 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Apr 2024 |
| 6671 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 6672 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Apr 2024 |
| 6673 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 6674 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Feb 2024 |
| 6675 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 6676 | Maverick Brothers Operating,Inc. | Enid, OK 73702 | Oil & Gas Operator | Apr 2024 |
| 6677 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 6678 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 6679 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 6680 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 6681 | Maverick Mudlogging | Eagle Pass, TX 78852 | Oil Operator | Apr 2024 |
| 6682 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Apr 2024 |
| 6683 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 6684 | Maverick Permian LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 6685 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 6686 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 6687 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 6688 | Maxey & Swan Oil Co. | Decatur, TX 76234 | Oil & Gas Operator | Apr 2007 |
| 6689 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Jan 2024 |
| 6690 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 6691 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 6692 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 6693 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 6694 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 6695 | Maxwell Resources Corporation | Oklahoma City, OK 73116-7746 | Oil & Gas Operator | Apr 2009 |
| 6696 | Maxwell, J. K. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 1995 |
| 6697 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 6698 | Maxwell, Riley G., Co. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 6699 | May Investments, Inc. | New Boston, TX 75570 | Oil & Gas Operator | Aug 2003 |
| 6700 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Apr 2024 |