| 601 | Pony Express Corporate Trust | Aledo, TX 76008 | Oil & Gas Operator | Jul 2025 |
| 602 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 603 | Pool Operating Corporation | Lago VIsta, TX 78645 | Oil & Gas Operator | Oct 2016 |
| 604 | Pool, Lloyd Operating | Sandia Park, NM 87047 | Gas Operator | Dec 2013 |
| 605 | Poor Boy Operating Co. | Lubbock, TX 79403 | Oil Operator | Jan 2022 |
| 606 | Pop Operating Company | Denton, TX 76202 | Oil & Gas Operator | Jul 2025 |
| 607 | Porosity Oil LLC | Imperial, TX 79743 | Oil Operator | Jul 2025 |
| 608 | Portal Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 609 | Portana Properties LLC | McKinney, TX 75072 | Oil Operator | Jul 2025 |
| 610 | Porter Operating Company, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Jul 2025 |
| 611 | Porter, E. J. | Mingus, TX 76463 | Gas Operator | Jan 2011 |
| 612 | Porter, James W. | Houston, TX 77240 | Oil & Gas Operator | Oct 1993 |
| 613 | Porter, James W. Special | Blanco, TX 78606 | Oil & Gas Operator | Jul 2025 |
| 614 | Portfolio Oil Corporation | Oklahoma City, OK 73119 | Oil & Gas Operator | May 2013 |
| 615 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 616 | Post Oak Operating, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 617 | Post, George P. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 618 | Potato Creek, L.L.C. | Edna, KS 67342 | Oil & Gas Operator | Mar 2025 |
| 619 | Poteet Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 1994 |
| 620 | Powco Oil & Gas Co. | Athens, TX 75751 | Oil & Gas Operator | Feb 1995 |
| 621 | Powder River Resources, LLC | Archer City, TX 76351 | Oil & Gas Operator | Jul 2025 |
| 622 | Powell & Brown | Denver City, TX 79323 | Oil & Gas Operator | Mar 2008 |
| 623 | Powell Properties, Inc. | Los Altos, CA 94024 | Oil & Gas Operator | Jul 2025 |
| 624 | Powell, A. Brandt | Coleman, TX 76834 | Oil & Gas Operator | Mar 1999 |
| 625 | Powell, A. Brandt Co. | Hawley, TX 79525 | Oil & Gas Operator | Jul 2025 |
| 626 | Powell, A. D., Oil Corp. | Luling, TX 78648 | Oil & Gas Operator | Aug 1996 |
| 627 | Powell, Gene Investments, Inc. | Longview, TX 75608 | Oil & Gas Operator | Apr 2024 |
| 628 | Powell, J.W. | Muenster, TX 76252 | Oil & Gas Operator | Dec 1994 |
| 629 | Powell, N. P. Estate | Tyler, TX 75702 | Oil & Gas Operator | Aug 1997 |
| 630 | Powell, N. P. Estate Partnership | Tyler, TX 75702 | Oil & Gas Operator | May 2002 |
| 631 | Powell-McCarroll Partnership | Sachse, TX 75048 | Oil & Gas Operator | Jul 2025 |
| 632 | Power, Scott | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1997 |
| 633 | Powerflex Services Inc. | Winters, TX 79567 | Oil & Gas Operator | Jul 2025 |
| 634 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Jul 2025 |
| 635 | Poynor Corporation | Beaumont, TX 77706 | Oil & Gas Operator | Jul 2025 |
| 636 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 637 | PPC Operating Company LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2019 |
| 638 | Prairie Crude, Inc. | Midland, TX 79704 | Oil & Gas Operator | Jan 2005 |
| 639 | Prairie Energy Company | Fort Worth, TX 76185 | Oil & Gas Operator | Mar 2003 |
| 640 | Prairie Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Jan 2017 |
| 641 | Prairie Petroleum, Inc | Plano, TX 75093 | Oil & Gas Operator | May 1999 |
| 642 | Prairie Production | San Antonio, TX 78228 | Oil & Gas Operator | Jul 2025 |
| 643 | Prairie Well Service, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Mar 1995 |
| 644 | Prasad, Hari Production Co. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 645 | Prasad, LTD. | Midland, TX 79701 | Oil & Gas Operator | Sep 2006 |
| 646 | Pratt, Griffith, Teten | Austin, TX 78701 | Oil & Gas Operator | Dec 1995 |
| 647 | Praxis Energy, LLC | Midland, TX 79705 | Oil Operator | Apr 2002 |
| 648 | Praxis Oil And Gas, LLC | Miami, FL 33145 | Oil Operator | Jul 2025 |
| 649 | Prayer Oil & Gas Production, LLC | Hallsville, TX 75650 | Oil & Gas Operator | Jul 2025 |
| 650 | PRC Operating, Inc. | Bowie, TX 76230 | Oil & Gas Operator | Jul 2025 |
| 651 | Pre Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Aug 1993 |
| 652 | Precio Energy, LLC | Beaumont, TX 77726 | Oil & Gas Operator | Jul 2025 |
| 653 | Precise Development, Inc. | Austin, TX 78709 | Oil & Gas Operator | May 2005 |
| 654 | Precision Drilling Company, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 1995 |
| 655 | Precision Operating Inc. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2014 |
| 656 | Preferred Pipeline Corp. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2025 |
| 657 | Premier Energy, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Mar 2008 |
| 658 | Premier Minerals, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2025 |
| 659 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 660 | Premier Natural Resources, L.P. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2007 |
| 661 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 662 | Premier Oil & Gas LLC | Blanchard, OK 73010-2010 | Oil Operator | Dec 2022 |
| 663 | Premier Operating Company | Tulsa, OK 74153 | Gas Operator | Nov 1996 |
| 664 | Premier Royalties, L.L.C. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 665 | Premium Exploration Company | Early, TX 76803 | Oil & Gas Operator | Jul 2025 |
| 666 | Prensorus Energy, LLC | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 667 | Prentice Napier & Green Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 668 | Prentice Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Sep 1994 |
| 669 | Prenwell, LLC | Tallahasse, FL 32309 | Oil & Gas Operator | Jul 2025 |
| 670 | Presco | Snyder, TX 79549 | Oil & Gas Operator | Jan 2024 |
| 671 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 672 | Presidio Petroleum LLC | Canadian, TX 79014 | Oil & Gas Operator | Jul 2025 |
| 673 | Presley Prod Investments, LLC | Abilene, TX 79604 | Oil Operator | Jul 2025 |
| 674 | Pressly Oil Interest, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2025 |
| 675 | Prestco, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jul 2025 |
| 676 | Preston Exploration LLC | Spring, TX 77387 | Oil & Gas Operator | Dec 2014 |
| 677 | Preston, John WM. | Houston, TX 77004 | Oil & Gas Operator | May 2004 |
| 678 | Prestonwood Operating LLC | Addison, TX 75001 | Oil Operator | Jul 2025 |
| 679 | Prestonwood WF LLC | Addison, TX 75001 | Oil Operator | Jul 2025 |
| 680 | Prevail Energy, Inc | Corpus Chrsti, TX 78469 | Oil & Gas Operator | Jul 2025 |
| 681 | Prevost Operating, L.L.C. | Kilgore, TX 75663 | Oil Operator | Dec 1998 |
| 682 | Pri Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Jul 2025 |
| 683 | Price Drilling & Exploration Co. | Benavides, TX 78341 | Oil & Gas Operator | Jul 2013 |
| 684 | Price Oil & Gas Co. | Houston, TX 77254 | Oil & Gas Operator | Feb 2002 |
| 685 | Price Operating, LLC | Sugar Land, TX 77496 | Oil Operator | Jul 2025 |
| 686 | Price, W. H. | Granbury, TX 76048 | Oil & Gas Operator | Jun 2024 |
| 687 | Price, W. H. & Sons | Granbury, TX 76048 | Oil & Gas Operator | Nov 1997 |
| 688 | Prickett Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 689 | Prickett, Jimmy | Wichita Falls, TX 76308 | Oil Operator | Feb 2002 |
| 690 | Prickly Pair Production | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 691 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2025 |
| 692 | Pride Exploration, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2015 |
| 693 | Priest Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 694 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Jun 2025 |
| 695 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Jul 2025 |
| 696 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 697 | Prime Operating | Queen City, TX 75572 | Oil & Gas Operator | Apr 2005 |
| 698 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 699 | Prime Time Oil & Gas Co., LTD. | Ruidoso, NM 88345 | Oil & Gas Operator | Mar 2003 |
| 700 | Prime Western Development, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Dec 1998 |