| 601 | Pease Oil & Gas Company | Grand Junction, CO 81506 | Oil & Gas Operator | May 2000 |
| 602 | Pease, Willard H | Grand Junction, CO 81502 | Gas Operator | May 1995 |
| 603 | Peba Oil & Gas Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 2015 |
| 604 | Peba Oil & Gas, Inc. | Nocona, TX 76255 | Oil & Gas Operator | Jun 2026 |
| 605 | Pecanosa Oil & Cattle Co. | New Braunfels, TX 78132 | Gas Operator | May 2013 |
| 606 | Peccary Corporation | Lubbock, TX 79453 | Oil & Gas Operator | Aug 2003 |
| 607 | Pech Oil Co., No. 2 | Midland, TX 79702 | Oil & Gas Operator | Apr 2013 |
| 608 | Pech Oil Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2013 |
| 609 | Peckenpaugh Farms | Farnsworth, TX 79033 | Oil & Gas Operator | Jun 2026 |
| 610 | Peco Foods, Inc. | | Oil & Gas Operator | Feb 2026 |
| 611 | Pecora Enterprises | Bradford, PA 16701-1026 | Oil & Gas Operator | Dec 1999 |
| 612 | Pecos Country Operating Inc. | N Richlnd HLS, TX 76182 | Oil Operator | Jun 2026 |
| 613 | Pecos Crude LLC | Sugar Land, TX 77479 | Oil Operator | Jun 2026 |
| 614 | Pecos Development Corporation | San Antonio, TX 78209 | Oil Operator | Aug 1988 |
| 615 | Pecos Operating Company, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2021 |
| 616 | Pecos Operators, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 617 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 618 | Pecos Production Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2005 |
| 619 | Pecos River Exploration, LLC | Allen, TX 75013 | Oil & Gas Operator | Jun 2025 |
| 620 | Pecos River Op Inc | Roswell, NM 88202 | Oil & Gas Operator | Dec 2020 |
| 621 | Pecos Valley Management Co. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2008 |
| 622 | Pecos Valley Operating Inc. | N Richlnd HLS, TX 76182 | Oil & Gas Operator | Jun 2026 |
| 623 | Pecos Western Corporation | | Gas Operator | Feb 1992 |
| 624 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 625 | Pedco Inc | | Oil & Gas Operator | Nov 1997 |
| 626 | Pedco Resources Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2008 |
| 627 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 628 | Peden Energy | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2004 |
| 629 | Peden Energy, Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | Jun 2026 |
| 630 | Peden, Marshell | Archer City, TX 76351 | Oil & Gas Operator | Jun 2026 |
| 631 | Peden, Oren Inc. | Levelland, TX 79336 | Oil & Gas Operator | May 2001 |
| 632 | Pedernales Petroleum Op, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 633 | Pedernales Petroleum Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 634 | Pedernales Production, LP | Houston, TX 77057 | Oil & Gas Operator | Mar 2022 |
| 635 | Pedestal Oil Company Inc | Oklahoma City, OK 73101-1522 | Oil & Gas Operator | May 2019 |
| 636 | Pedgeco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1984 |
| 637 | Pedocs Inc | Bixby, OK 74008 | Oil & Gas Operator | Nov 2025 |
| 638 | Pedry J J | | Oil Operator | Sep 1989 |
| 639 | Peery, J. W. | Midland, TX 79701 | Oil & Gas Operator | Aug 2007 |
| 640 | Peewe Oil Co. | | Oil Operator | Feb 2026 |
| 641 | Pefley Oil & Gas, Inc. | Colden, NY 14033 | Gas Operator | Dec 2024 |
| 642 | Pegasi Energy Resources Corp | Tyler, TX 75710 | Oil & Gas Operator | Jul 2007 |
| 643 | Pegasi Operating Inc. | Jefferson, TX 75657 | Oil & Gas Operator | Jun 2026 |
| 644 | Pegasus Energy | Oklahoma City, OK 73162 | Oil & Gas Operator | Apr 1997 |
| 645 | Pegasus Energy Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Mar 2015 |
| 646 | Pegasus Operating, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Dec 2025 |
| 647 | Pegasus P And A LLC | Kilgore, TX 75663 | Oil Operator | Jun 2026 |
| 648 | Pegasus Petroleum Corporation | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2026 |
| 649 | Pegg Oil LLC | Allen, OK 74825-4900 | Oil Operator | Aug 2022 |
| 650 | Peggy J Bell | Sheffield, PA 16347-0776 | Oil & Gas Operator | Dec 2004 |
| 651 | Pel-Tex - McMoran | | Oil & Gas Operator | Dec 1985 |
| 652 | Pel-Tex Oil Company, Inc. | | Oil & Gas Operator | Jul 1995 |
| 653 | Pel-Tex Oil Company, LLC | | Oil & Gas Operator | Nov 2010 |
| 654 | Pel-Tex, Inc. | | Oil & Gas Operator | Jul 1985 |
| 655 | Peles, LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 656 | Pelican Dome Exploration | Harahan, LA 70123 | Oil & Gas Operator | Jun 1997 |
| 657 | Pelican Dome Exploration Inc. | Harahan, LA 70123 | Oil & Gas Operator | Aug 2000 |
| 658 | Pelican Gas Prod. Assoc. | | Oil & Gas Operator | Oct 1987 |
| 659 | Pelican Hill Oil & Gas, Inc. | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 660 | Pelican Producing Co. | | Gas Operator | Nov 1992 |
| 661 | Pelican Producing Inc | Caldwell, OH 43724 | Oil & Gas Operator | Dec 1996 |
| 662 | Pelican Production Company | New Orleans, LA 70130-2477 | Oil & Gas Operator | Mar 2014 |
| 663 | Pelican Resource | | Oil Operator | Jan 1991 |
| 664 | Pelico Pipeline, LLC | | Oil Operator | Dec 2024 |
| 665 | Pelletter, James J & Weist, Richard M | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 666 | Pelto Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1998 |
| 667 | Pemberton, W. C. Oil Co., Inc. | Cameron, TX 76520 | Oil & Gas Operator | Jun 2026 |
| 668 | Pembroke Central School District | Corfu, NY 14036 | Gas Operator | Dec 2024 |
| 669 | Pembrook Oil Company | Big Lake, TX 76932 | Oil & Gas Operator | May 1999 |
| 670 | Pembrooke Oil & Gas Inc | Franklin, PA 16323-7760 | Oil & Gas Operator | Dec 2025 |
| 671 | Pemco Gas Inc | Indian Harbor B, FL 32937 | Oil & Gas Operator | Dec 1997 |
| 672 | Pemco LLC | Skiatook, OK 74070 | Oil Operator | Mar 2026 |
| 673 | Pemex Inc | Dallas, TX 75367-0249 | Oil & Gas Operator | Nov 2015 |
| 674 | Pen-Tex Production Co. Inc. | Penwell, TX 79776 | Oil & Gas Operator | Jun 2026 |
| 675 | Pen-Tex Production Co. L.L.C. | Penwell, TX 79776 | Oil & Gas Operator | Nov 1998 |
| 676 | Pend Oreille Oil & Gas Company | | Oil & Gas Operator | Sep 1989 |
| 677 | Pendergraft Oil Co. | Lueders, TX 79533 | Oil & Gas Operator | Jan 1998 |
| 678 | Pendleton Land & | | Oil Operator | Aug 1985 |
| 679 | Pendolino Resources, LLC | Dallas, TX 75209 | Gas Operator | Mar 2023 |
| 680 | Pendragon Energy Partners Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2009 |
| 681 | Pendragon Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2026 |
| 682 | Pendulum Petrole | | Oil & Gas Operator | Dec 1995 |
| 683 | Pendulum Petroleum, Inc. | Pinedale, WY 82941 | Oil Operator | Aug 1999 |
| 684 | Penequine Ranch | | Gas Operator | Sep 2019 |
| 685 | Penergy | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 686 | Pengo Petroleum Inc | | Oil & Gas Operator | Dec 2013 |
| 687 | Pengo Petroleum, Inc. & J.W.S. | | Oil & Gas Operator | Jul 1977 |
| 688 | Pengo Producing Company | | Oil & Gas Operator | Mar 1987 |
| 689 | Peninsula Group Inc | Peninsula, OH 44264 | Oil & Gas Operator | Dec 1991 |
| 690 | Peninsula Open Space Trust | | Oil & Gas Operator | Dec 2008 |
| 691 | Peninsular Oil & Gas Co | Ada, MI 49301 | Oil & Gas Operator | Dec 2001 |
| 692 | Penn Homa Oil & Gas Co | Edmond, OK 73083 | Oil & Gas Operator | Oct 2013 |
| 693 | Penn Inc. | | Oil & Gas Operator | Dec 2004 |
| 694 | Penn Production Company Inc | | Oil & Gas Operator | Nov 2014 |
| 695 | Penn Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Sep 1987 |
| 696 | Penn VIew Exploration Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Mar 2026 |
| 697 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Sep 2025 |
| 698 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 699 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 700 | Penn, G. R. Production Co. | McPherson, KS 67460 | Gas Operator | Nov 1997 |