| 7401 | Muenster Drilling Co. Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 7402 | Mugg, John D. Jr. | San Antonio, TX 78216 | Oil & Gas Operator | Nov 1997 |
| 7403 | Muirfield Exploration, LTD. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2025 |
| 7404 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jun 2024 |
| 7405 | Muleshoe Crude, LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 7406 | Muller Oil & Gas | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2025 |
| 7407 | Mullin, W. B. | Graham, TX 76450 | Oil & Gas Operator | Sep 1998 |
| 7408 | Mullins, Manuel | Olney, TX 76374 | Oil & Gas Operator | Jul 2025 |
| 7409 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 7410 | Mulloy, J. W. Associates, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |
| 7411 | Multipay Energy, Inc. | Austin, TX 78749 | Oil Operator | Jul 2025 |
| 7412 | Munn, W. H. Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2002 |
| 7413 | Munoco Co. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2021 |
| 7414 | Munoz Farms Operating Co., LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jul 2025 |
| 7415 | Munson Operating, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 7416 | Munson, Charles C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2002 |
| 7417 | Munson, David M. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 7418 | Munson, David M. Inc. | Dallas, TX 75251 | Oil & Gas Operator | Jul 2025 |
| 7419 | Munson, E. P., Jr. | Fort Worth, TX 76121 | Oil & Gas Operator | Oct 1995 |
| 7420 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Apr 2025 |
| 7421 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | Mar 2024 |
| 7422 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 7423 | Murchison, G. B. Trust | Dallas, TX 75283 | Oil & Gas Operator | Sep 1994 |
| 7424 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | May 2025 |
| 7425 | Murjo Oil & Royalty Company | Fort Worth, TX 76121 | Oil & Gas Operator | Mar 2025 |
| 7426 | Muroz International Group Inc | Houston, TX 77056 | Oil Operator | Jul 2025 |
| 7427 | Murphree Brothers Production | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 7428 | Murphree Production | Monahans, TX 79756 | Oil & Gas Operator | Jul 2014 |
| 7429 | Murphy & Associates, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Oct 1996 |
| 7430 | Murphy Energy Services, LP | Saratoga, TX 77585 | Oil Operator | Dec 2018 |
| 7431 | Murphy Expl. & Prod. Co. - USA | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 7432 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 7433 | Murphy Exploration & Production | Houston, TX 77024 | Oil Operator | Dec 2024 |
| 7434 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 7435 | Murphy Production Corp. | Austin, TX 78731 | Oil & Gas Operator | Sep 2013 |
| 7436 | Murphy, Bill W. Operating Co,Inc | Richardson, TX 75080 | Oil & Gas Operator | Jul 2025 |
| 7437 | Murphy, K. P. Oil Operator | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 7438 | Murray, Tom Enterprises | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 7439 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Jul 2025 |
| 7440 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 7441 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 7442 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 7443 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 7444 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 7445 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 7446 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 7447 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 7448 | MV Purchasing LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 7449 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | Jul 2025 |
| 7450 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 7451 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 7452 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | Jul 2025 |
| 7453 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Jul 2025 |
| 7454 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | Jul 2025 |
| 7455 | My Hop Mineral | Moorhead, MN 56560 | Oil & Gas Operator | Jul 2025 |
| 7456 | Myco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2003 |
| 7457 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 7458 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | Jul 2025 |
| 7459 | Myd, Inc. | Irving, TX 75062 | Oil & Gas Operator | Mar 1998 |
| 7460 | Myers, A. J. | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2025 |
| 7461 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | Jul 2025 |
| 7462 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 7463 | Myung And Associates, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2000 |
| 7464 | MZ Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 7465 | N & B Oil And Gas LLC | Monahans, TX 79756 | Oil & Gas Operator | Jul 2025 |
| 7466 | N & O Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Jul 2025 |
| 7467 | N C B Oil Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 7468 | N S P Operating Group LLC | El Campo, TX 77437 | Oil & Gas Operator | Aug 2021 |
| 7469 | N. A. Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 2007 |
| 7470 | N. E. Operating Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2013 |
| 7471 | Nabers, Lynn | Austin, TX 78751 | Gas Operator | Jul 2010 |
| 7472 | Nabob Production Company | Amarillo, TX 79105 | Gas Operator | Dec 1991 |
| 7473 | Naco Production | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 7474 | Nacogdoches Oil & Gas Inc | Nacogdoches, TX 75963 | Oil & Gas Operator | Jul 2025 |
| 7475 | Nadcf Recovery Group, Inc. | Chapin, SC 29036 | Oil & Gas Operator | Jul 2025 |
| 7476 | Nadel And Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 7477 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 7478 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2025 |
| 7479 | Nadsoilco LLC | Chicago, IL 60606 | Oil & Gas Operator | Jul 2025 |
| 7480 | Naifco Oil & Gas LLC | Oklahoma City, OK 73107 | Oil & Gas Operator | Apr 2025 |
| 7481 | Nails Operating Company LLC | Hondo, TX 78861 | Oil Operator | Jul 2025 |
| 7482 | Nall Oil & Gas | Mineral Wells, TX 76067 | Oil & Gas Operator | Jul 2025 |
| 7483 | Nance Engineering Inc. | Houston, TX 77058 | Oil & Gas Operator | Mar 2002 |
| 7484 | Narbo Farms, LTD. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 7485 | Nasser Oil & Gas, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 7486 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 7487 | National Investors Group | Warren, OH 44481 | Oil & Gas Operator | Nov 1996 |
| 7488 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 7489 | National Onshore LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 7490 | National Surface & Minerals, LLC | Addison, TX 75001 | Gas Operator | Jan 2023 |
| 7491 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 7492 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 7493 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 7494 | Natural Gas MKTG. & Storage Co. | Houston, TX 77251 | Oil & Gas Operator | Sep 1996 |
| 7495 | Natural Gas Pipeline Co Of Amer. | Houston, TX 77002 | Gas Operator | Jul 2008 |
| 7496 | Natural Petroleum Company | Overton, TX 75684 | Oil & Gas Operator | Jun 1994 |
| 7497 | Natural Reserves Group, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1993 |
| 7498 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Jul 2025 |
| 7499 | Nautilus Exploration, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Nov 2021 |
| 7500 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Jul 2025 |