| 601 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 602 | Mina Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2012 |
| 603 | Minc Oil Co., LLC | El Paso, TX 79938 | Oil Operator | Apr 2024 |
| 604 | Minco Oil And Gas Co. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 605 | Miner, R. C. Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Apr 2002 |
| 606 | Miner, R. C. Oil, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Apr 2024 |
| 607 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 608 | Mineral Resources, Incorporated | Lewisville, TX 75029 | Oil & Gas Operator | Apr 2024 |
| 609 | Mineral Technologies, Inc. | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 610 | Minexprod LLC | Katy, TX 77494 | Oil Operator | Apr 2024 |
| 611 | Mingus Oil & Gas | Mingus, TX 76463 | Oil & Gas Operator | Apr 2024 |
| 612 | Minihan Oil & Gas Corporation | Midland, TX 79704 | Oil & Gas Operator | Apr 2004 |
| 613 | Minihan Oil & Gas LTD. | Denver, CO 80202 | Oil & Gas Operator | Jul 2006 |
| 614 | Mink, Jay, Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Aug 2017 |
| 615 | Minuja Oil And Gas LLC | Corpus Christi, TX 78401 | Oil & Gas Operator | Sep 1996 |
| 616 | Minuteman Energy, LLC | Georgetown, TX 78633 | Oil & Gas Operator | Feb 2015 |
| 617 | Minyak Producing Company, Inc. | Sabine Pass, TX 77655 | Oil & Gas Operator | Apr 2024 |
| 618 | Miocene Oil & Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jul 1998 |
| 619 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | Apr 2024 |
| 620 | Mir-Tex Energy Corp. | Mirando City, TX 78369 | Oil & Gas Operator | Aug 2003 |
| 621 | Miramar Petroleum, Inc. | Corpus Chrsti, TX 78463 | Oil & Gas Operator | Sep 2017 |
| 622 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 623 | Mirando Resource, L.L.C. | Freer, TX 78357 | Oil & Gas Operator | Apr 2024 |
| 624 | Miresco, Inc. | Houston, TX 77060 | Oil & Gas Operator | Jan 1995 |
| 625 | Misener Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2010 |
| 626 | Mission Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 627 | Mission Exploration, Inc. | Tolar, TX 76476 | Oil & Gas Operator | Dec 1987 |
| 628 | Mission Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 629 | Mission River Systems, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Apr 2024 |
| 630 | Mississippi Ventures, Inc. | Granbury, TX 76048 | Gas Operator | Jul 1997 |
| 631 | Mist Prod. & Exploration Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 632 | Mistex Operating, Inc. | Lewisville, TX 75029 | Oil & Gas Operator | Apr 2024 |
| 633 | Mitchell Drilling Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 634 | Mitchell Ehrlich Oil & Gas, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 635 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 636 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 637 | Mitchell Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 638 | Mitchell Resources, Inc. | Addison, TX 75001 | Oil & Gas Operator | Aug 2003 |
| 639 | Mitchell, James - Operator | Lamesa, TX 79331 | Oil & Gas Operator | Mar 2008 |
| 640 | Mito Resources TX LLC | Edmond, OK 73013 | Oil & Gas Operator | Apr 2024 |
| 641 | Mitsui E&P USA LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 642 | Mixon, Robert N. | Lometa, TX 76853 | Oil & Gas Operator | Apr 2024 |
| 643 | MJ Energy Company, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2024 |
| 644 | MJ Oil, Inc. | Houston, TX 77265 | Oil & Gas Operator | Apr 2024 |
| 645 | MJB Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2024 |
| 646 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Apr 2024 |
| 647 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 648 | MK Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2014 |
| 649 | MK Operating Company LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Apr 2024 |
| 650 | MKS Consulting Corporation | Weatherford, TX 76086 | Oil & Gas Operator | Jul 2005 |
| 651 | MKS Natural Gas Company | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2016 |
| 652 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 653 | MLB Operating Services, LLC | Tenn Colony, TX 75861 | Oil & Gas Operator | Apr 2024 |
| 654 | MLC Co., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 1996 |
| 655 | MLC Operating, LP | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 656 | MLF, Inc. | Houston, TX 77096 | Gas Operator | Nov 2009 |
| 657 | MM China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Apr 2024 |
| 658 | MMD Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2000 |
| 659 | MMG Oil Company | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2006 |
| 660 | MMGL TXPH, LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 661 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | Apr 2024 |
| 662 | Mo-Jon, Inc. | Edroy, TX 78352 | Oil & Gas Operator | May 1999 |
| 663 | Mobeetie Resource Dev LLC | Booker, TX 79005 | Oil & Gas Operator | Apr 2024 |
| 664 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 665 | Mobil Petro Vac, Inc. | Duncan, OK 73533 | Oil & Gas Operator | Apr 2024 |
| 666 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 667 | Mobile Petrovac, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 668 | Mobile Production Systems, Inc. | Austin, TX 78711 | Oil & Gas Operator | Feb 1995 |
| 669 | Mobpar, Inc. | Houston, TX 77219 | Oil & Gas Operator | Apr 2024 |
| 670 | Mockingbird Oil, Inc. (I) | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 671 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Apr 2024 |
| 672 | Moenning, Vernie | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 673 | Mogul Energy International, Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 2017 |
| 674 | Mogul Operating LLC | St Petersburg, FL 33706 | Oil Operator | Apr 2024 |
| 675 | Mogul Resources, LLC | Ranger, TX 76470 | Oil & Gas Operator | Apr 2024 |
| 676 | Mohican Exploration, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 677 | Mohican Oil & Gas, L.L.C. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Apr 2013 |
| 678 | Mohican Operating, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2021 |
| 679 | Mojac Energy Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 1997 |
| 680 | Mojave Operating Company | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 681 | Mojave Resources, LLC | New Braunfels, TX 78132 | Oil Operator | Apr 2024 |
| 682 | Mokan Capital, LLC | Spicewood, TX 78669 | Oil Operator | Apr 2024 |
| 683 | Molder, Tom | Imperial, TX 79743 | Oil & Gas Operator | Apr 2024 |
| 684 | Mole Hole Prod. | Bridgeport, TX 76426 | Oil Operator | Apr 2024 |
| 685 | Moleco, LLC | Santa Anna, TX 76878 | Oil Operator | Apr 2024 |
| 686 | Moleo Gas Corp. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2018 |
| 687 | Moller, Herbert T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 688 | Molly Oil & Gas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Apr 2024 |
| 689 | Molopo Energy Texas, LLC | Canada, 00100 | Oil & Gas Operator | Jan 2015 |
| 690 | Molsdorf Ag LLC | McAllen, TX 78503 | Oil Operator | Sep 2013 |
| 691 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 692 | Momentum Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 693 | Momentum Oil & Gas, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | May 2015 |
| 694 | Momentum Oil Company | Albany, TX 76430 | Oil & Gas Operator | May 2003 |
| 695 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 696 | Momentum Production Corp. | Baytown, TX 77521 | Oil & Gas Operator | Apr 2024 |
| 697 | Mon Corp. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 698 | Monadnock Resources Op Co, LLC | Dallas, TX 75209 | Oil & Gas Operator | Jan 2021 |
| 699 | Monadnock Resources, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2020 |
| 700 | Monarch Energy LLC | Paola, KS 66071 | Oil Operator | Dec 2023 |