| 501 | Minihan Oil & Gas Corporation | Midland, TX 79704 | Oil & Gas Operator | Apr 2004 |
| 502 | Minihan Oil & Gas LTD. | Denver, CO 80202 | Oil & Gas Operator | Jul 2006 |
| 503 | Miocene Oil & Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jul 1998 |
| 504 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | Apr 2024 |
| 505 | Miranda Energy Corporation | Midland, TX 79705 | Oil & Gas Operator | Jun 2016 |
| 506 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 507 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 508 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 509 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 510 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 511 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Apr 2024 |
| 512 | Montare Operating, LTD. | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2024 |
| 513 | Montrose Operating LLC | Broken Arrow, OK 74012 | Oil & Gas Operator | Apr 2024 |
| 514 | Moody Oil Co. | Pearsall, TX 78061 | Oil & Gas Operator | Apr 2024 |
| 515 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 516 | Morningstar Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2022 |
| 517 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 518 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 519 | Mueller Engineering Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Feb 2002 |
| 520 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 521 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 522 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 523 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 524 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 525 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 526 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Apr 2024 |
| 527 | Necessity Well Service, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2006 |
| 528 | Newpark Environmental SVCS LLC | Lafayette, LA 70506 | Oil Operator | Jul 2014 |
| 529 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | Apr 2024 |
| 530 | NGL Crude Logistics LLC | Denver, CO 80220 | Oil Operator | Dec 2023 |
| 531 | Nitro Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 532 | No Limit Energy LLC | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 533 | Noramco Production, LLC | Midland, TX 79710 | Oil & Gas Operator | Jan 2023 |
| 534 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Apr 2024 |
| 535 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 536 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Jan 2024 |
| 537 | O & O Operators, LLC. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 538 | O'Brien, George H. Jr. | Midland, TX 79701 | Oil & Gas Operator | Jun 1994 |
| 539 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 540 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Apr 2024 |
| 541 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 542 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 543 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 544 | Odessa Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 545 | Odessa Oil Investment Co., Inc. | Odessa, TX 79762 | Oil & Gas Operator | Nov 2016 |
| 546 | Oilfield Management, Inc. (A) | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 547 | Oilwell Operators, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 548 | Ojai Oil Company | Camarillo, CA 93012 | Oil & Gas Operator | Dec 2023 |
| 549 | Ok Arena Operating Company | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2024 |
| 550 | Okla. Magic Circle Energy Corp. | Shawnee, OK 74801 | Oil & Gas Operator | Jul 2004 |
| 551 | Oklahoma Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2013 |
| 552 | Olsen Energy Inc. | Boerne, TX 78006 | Oil & Gas Operator | Apr 2024 |
| 553 | Omar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 554 | Opal Resources Operating Co.,LLC | Cypress, TX 77429 | Oil & Gas Operator | Jan 2019 |
| 555 | Opco Oil & Gas Co. | Dallas, TX 75231 | Oil & Gas Operator | Aug 2003 |
| 556 | Orbitron Operating Corp. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1995 |
| 557 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 558 | Oso Exploration & Production, LLC | Houston, TX 77269 | Oil Operator | Apr 2024 |
| 559 | Otc Petroleum Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Mar 2015 |
| 560 | Ouut Investing LLC | Mineral Wells, TX 76068 | Oil Operator | Mar 2020 |
| 561 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 562 | Owens Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 563 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 564 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 565 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 566 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 567 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 568 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 569 | Parallel Petroleum LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 570 | Parish, John R. | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 571 | Parker & Parsley Acq. Group LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2002 |
| 572 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 573 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 574 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 575 | Parsley Energy Operations, LLC | Irving, TX 75038 | Oil & Gas Operator | Jan 2021 |
| 576 | Patriot Production LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2023 |
| 577 | Patriot Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 578 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 579 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 580 | PDC Energy | Denver, CO 80203 | Oil & Gas Operator | Nov 2012 |
| 581 | PDC-WV-Co Corporation | Denver, CO 80203 | Oil & Gas Operator | Aug 2010 |
| 582 | Pearce, Roy F., Jr. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 583 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Apr 2024 |
| 584 | Pecos Development Corporation | San Antonio, TX 78209 | Oil Operator | Aug 1988 |
| 585 | Pecos Operating Company, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2021 |
| 586 | Pecos Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 587 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 588 | Pennant Dev. And Prod., LLC | Midland, TX 79702 | Oil Operator | Apr 2024 |
| 589 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 590 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 591 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 592 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 2024 |
| 593 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 594 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 595 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 596 | Permian Resources Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 597 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 598 | Permian Services Co., LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 599 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 600 | Petro-West Corporation | Lubbock, TX 79404 | Oil & Gas Operator | Oct 2001 |