| 6501 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Apr 2024 |
| 6502 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 6503 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 6504 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 6505 | Maertins Production, LLC | Queen City, TX 75572 | Oil Operator | Apr 2024 |
| 6506 | Magellan E&P Holdings, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 6507 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 6508 | Magic City Oil & Gas | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2024 |
| 6509 | Magic Oil & Gas Inc. | Houston, TX 77079 | Oil & Gas Operator | Jan 2001 |
| 6510 | Magna Diversified Group, Inc. | Jacksonville, TX 75766 | Oil & Gas Operator | Oct 2013 |
| 6511 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 6512 | Magna Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 6513 | Magnatex Corp | Midland, TX 79702-1311 | Oil & Gas Operator | Feb 1995 |
| 6514 | Magnet Oil LP | Bronte, TX 76933 | Oil & Gas Operator | Apr 2024 |
| 6515 | Magnolia Oil & Gas Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 6516 | Magnolia Production Co | Atlanta, TX 75551 | Oil & Gas Operator | Apr 2024 |
| 6517 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | Feb 2024 |
| 6518 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 6519 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 6520 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 6521 | Magnum Oilfield Services LLC | Bakersfield, CA 93309 | Oil Operator | Apr 2024 |
| 6522 | Magnum Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 6523 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 6524 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 6525 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 6526 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2024 |
| 6527 | Magnys Operations, LLC | El Paso, TX 79932 | Oil Operator | Apr 2024 |
| 6528 | Magruder '81, LTD. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 6529 | Magruder, Edwin H., Jr. | Midland, TX 79701 | Oil & Gas Operator | Oct 2019 |
| 6530 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 6531 | Mahfouz Energy Company | Houston, TX 77255 | Oil & Gas Operator | Nov 2020 |
| 6532 | Mahler & Scott | Ruidoso, NM 88355 | Oil & Gas Operator | Aug 2003 |
| 6533 | Mahler, Kelly Operating | Graham, TX 76450 | Oil & Gas Operator | Mar 2017 |
| 6534 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2023 |
| 6535 | Main Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2009 |
| 6536 | Main Street Royalty, Inc. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 1999 |
| 6537 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 6538 | Majestic Petroleum Corporation | Dallas, TX 75230 | Oil & Gas Operator | Oct 1996 |
| 6539 | Majestic Resources, Inc. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Nov 2007 |
| 6540 | Mak-J Energy Partners(TX),LTD. | Denver, CO 80206 | Oil & Gas Operator | Sep 2013 |
| 6541 | Makar Production Company | Amarillo, TX 79118 | Oil & Gas Operator | Apr 2024 |
| 6542 | Makk Oil Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2024 |
| 6543 | Mako Exploration Management, LLC | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2024 |
| 6544 | Makoil, Inc. | Lake Forest, CA 92630 | Oil & Gas Operator | Jul 2007 |
| 6545 | Maledon Enterprises | Austin, TX 78738 | Oil & Gas Operator | Feb 1996 |
| 6546 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 6547 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 6548 | Malone Oil Production | La Vernia, TX 78121 | Oil & Gas Operator | Apr 2024 |
| 6549 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 6550 | Mamerow Energy Corp | Ganado, TX 77962 | Oil & Gas Operator | Apr 2024 |
| 6551 | Mammoth Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2023 |
| 6552 | Mandarin Oil & Gas Company | Austin, TX 78714 | Oil & Gas Operator | Apr 2024 |
| 6553 | Mandujano, Alfonso & Olga | Von Ormy, TX 78073 | Oil & Gas Operator | Dec 2014 |
| 6554 | Mandujano, Alfonso, Jr. | Von Ormy, TX 78073 | Oil Operator | Apr 2024 |
| 6555 | Manhattan Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 6556 | Manley, John D. III, Oper., Inc | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2016 |
| 6557 | Manning, Jack | Odessa, TX 79760 | Oil & Gas Operator | Dec 2003 |
| 6558 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 6559 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | Apr 2024 |
| 6560 | Manti Tarka Permian Op, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 6561 | Mantle Oil & Gas, LLC | Friendswood, TX 77546 | Oil & Gas Operator | Apr 2024 |
| 6562 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jan 2024 |
| 6563 | Manzanita Corporation | Midland, TX 79710 | Oil & Gas Operator | Nov 2008 |
| 6564 | Manzanita Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 6565 | Manzano LLC | Roswell, NM 88202 | Oil & Gas Operator | Apr 2024 |
| 6566 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 6567 | Manziel Interests | Tyler, TX 75711 | Oil & Gas Operator | Jun 2004 |
| 6568 | Manziel Management Corporation | Tyler, TX 75711 | Oil Operator | Feb 2014 |
| 6569 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 6570 | Maple Energy Holdings, LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2023 |
| 6571 | Mar Oil & Gas Corp. | Santa Fe, NM 87502 | Oil & Gas Operator | Feb 2024 |
| 6572 | Mar-Bec Energy Company, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | May 2001 |
| 6573 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 6574 | Maralo, LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 6575 | Maran Oil Company | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2020 |
| 6576 | Maranatha Exploration, LP | Wichita Falls, TX 76307 | Oil Operator | Feb 2012 |
| 6577 | Maranatha Oil Company | Gonzales, TX 78629 | Oil & Gas Operator | Apr 2024 |
| 6578 | Marata Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 6579 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Feb 2024 |
| 6580 | Marathon Oil Ef LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 6581 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 6582 | Marchman, J. E. | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 6583 | Marco Polo Exploration, Inc. | Rosenberg, TX 77471 | Oil & Gas Operator | Dec 1993 |
| 6584 | Marcon Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2011 |
| 6585 | Marcum Drilling Co. | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 6586 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Apr 2024 |
| 6587 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 6588 | Marianas Operating Co. | Abilene, TX 79601 | Oil & Gas Operator | Aug 2003 |
| 6589 | Marienfeld Exploration | Houston, TX 77005 | Oil & Gas Operator | Mar 1994 |
| 6590 | Marienfeld Exploration, Inc. | Ojai, CA 93024 | Oil & Gas Operator | Apr 2024 |
| 6591 | Mariner Energy, Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 6592 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Apr 2024 |
| 6593 | Marion County Prod. Co., L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 6594 | Mariposa Production, LP | Brady, TX 76825 | Oil & Gas Operator | Nov 2022 |
| 6595 | Maritech Resources, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2009 |
| 6596 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 6597 | Marjo Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Oct 1999 |
| 6598 | Marjo Operating Company Inc | Tulsa, OK 741010729 | Oil & Gas Operator | Jan 2024 |
| 6599 | Mark I Oil Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 6600 | Mark IV Energy | San Antonio, TX 78213 | Oil & Gas Operator | Apr 1993 |