| 701 | Pengo Petroleum, Inc. & J.W.S. | | Oil & Gas Operator | Jul 1977 |
| 702 | Pengo Producing Company | | Oil & Gas Operator | Mar 1987 |
| 703 | Peninsula Group Inc | Peninsula, OH 44264 | Oil & Gas Operator | Dec 1991 |
| 704 | Peninsula Open Space Trust | | Oil & Gas Operator | Dec 2008 |
| 705 | Peninsular Oil & Gas Co | Ada, MI 49301-96-96 | Oil & Gas Operator | Dec 2001 |
| 706 | Penn Homa Oil & Gas Co | Edmond, OK 73083 | Oil & Gas Operator | Oct 2013 |
| 707 | Penn Inc. | | Oil & Gas Operator | Dec 2004 |
| 708 | Penn Production Company Inc | | Oil & Gas Operator | Nov 2014 |
| 709 | Penn Resources, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Sep 1987 |
| 710 | Penn VIew Exploration Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Dec 2024 |
| 711 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 712 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 713 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 714 | Penn, G. R. Production Co. | McPherson, KS 67460 | Gas Operator | Nov 1997 |
| 715 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 716 | Pennaco Energy Incorporated | Gillette, WY 82718 | Oil & Gas Operator | Feb 2021 |
| 717 | Pennant Dev. And Prod., LLC | Midland, TX 79702 | Oil Operator | Jun 2025 |
| 718 | Pennant Energy LLC | Oklahoma City, OK 73116 | Oil Operator | Dec 2024 |
| 719 | Pennant Oil & Gas LLC | Oklahma City, OK 73159-6905 | Oil & Gas Operator | Jan 2024 |
| 720 | Pennant Petroleum Corporation | | Oil Operator | Dec 2002 |
| 721 | Pennartz Productions, LLC. | Jacksboro, TX 76458 | Oil Operator | Jun 2025 |
| 722 | Penneco Exploration Company Of Wyo LLC | Delmont, PA 15626 | Oil Operator | Aug 2021 |
| 723 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2024 |
| 724 | Pennenergy Resources LLC | Pittsburgh, PA 15275-1063-1063 | Oil & Gas Operator | Mar 2025 |
| 725 | Penner Energy Inc | Oklahoma City, OK 73120-1930 | Oil & Gas Operator | Mar 2025 |
| 726 | Pennfield Energy LLC | Erie, PA 16510-4760 | Oil & Gas Operator | Dec 2021 |
| 727 | Pennhills Resources LLC | MT. Jewett, PA 16740 | Oil & Gas Operator | Mar 2025 |
| 728 | Pennine Resc Inc | | Oil Operator | Sep 1992 |
| 729 | Pennington Oil & Gas Int, LLC | | Oil & Gas Operator | Dec 2024 |
| 730 | Pennington Operating Company, LLC | | Oil & Gas Operator | Jul 2020 |
| 731 | Pennington Refining LLC | Grand Prairie, TX 75051 | Oil Operator | Jun 2025 |
| 732 | Pennington, W. L., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 1996 |
| 733 | Pennmark Resources Company | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 734 | Penntex Petroleum Corporation | Austin, TX 78731 | Oil & Gas Operator | Jun 2025 |
| 735 | Penntex Resources, L.P. | State College, PA 16803 | Oil & Gas Operator | Mar 2016 |
| 736 | Penny, Ralph E. | White Plains, NY 10601 | Oil & Gas Operator | Jul 2023 |
| 737 | Pennzenergy | Houston, TX 77252 | Oil & Gas Operator | Dec 1986 |
| 738 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 739 | Pennzenergy Explor & Prod LLC | | Oil & Gas Operator | Dec 1999 |
| 740 | Pennzenergy Exploration & Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 741 | Pennzoil Company | Midland, TX 79710-0090 | Oil & Gas Operator | Mar 2000 |
| 742 | Pennzoil E & P & M H Marr | | Oil & Gas Operator | Sep 1993 |
| 743 | Pennzoil E & P Co - Arco | | Oil & Gas Operator | Dec 1993 |
| 744 | Pennzoil E & P Co - Clark Oil | | Oil & Gas Operator | Apr 1980 |
| 745 | Pennzoil E & P Co Et Al | | Oil & Gas Operator | Feb 1999 |
| 746 | Pennzoil E & P Co-Sohio Et Al | | Oil & Gas Operator | Jun 1991 |
| 747 | Pennzoil E & P Co-Sohio Petr | | Oil & Gas Operator | Feb 1999 |
| 748 | Pennzoil Expl & Prod Co -TX | | Oil & Gas Operator | May 1993 |
| 749 | Pennzoil Expl & Prod Co. -MS | | Oil Operator | Jan 1988 |
| 750 | Pennzoil Explor & Prod Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2000 |
| 751 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 752 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 753 | Pennzoil Prod Co | Vienna, WV 26105-2141 | Oil & Gas Operator | Dec 2000 |
| 754 | Pennzoil Producing Company | | Oil & Gas Operator | Oct 1992 |
| 755 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 2025 |
| 756 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Jun 2025 |
| 757 | Pense Brothers Drilling | | Oil Operator | Dec 1998 |
| 758 | Pentad Development Corp. (A) | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 759 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 760 | Pentarch Petroleum | | Oil Operator | Apr 2025 |
| 761 | Pentergy Operating, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Jun 2025 |
| 762 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 763 | Pentex Operating Company | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 1994 |
| 764 | Penton And Penton | | Oil & Gas Operator | Jan 1983 |
| 765 | Pentress Gas LLC | Pentress, WV 26544 | Gas Operator | Dec 2021 |
| 766 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 767 | Penwell South Operating LLC | Houston, TX 77269 | Oil Operator | Jun 2025 |
| 768 | Peoco LLC | | Gas Operator | Apr 2025 |
| 769 | Peoples Bank & Trust Company | McPherson, KS 67460 | Oil Operator | Jan 2013 |
| 770 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 771 | Peoples Energy Production-Texas, L.P. | Houston, TX 77010 | Oil & Gas Operator | Oct 2007 |
| 772 | Peoples Gas Co LLC | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2005 |
| 773 | Peoples Natural Gas Co LLC | Pittsburgh, PA 15212 | Gas Operator | Dec 2016 |
| 774 | Peoples Oil, LLC | Ottawa, KS 66067 | Oil Operator | Feb 2025 |
| 775 | Pep Drilling LLC | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2022 |
| 776 | Pepin Oil Co | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2013 |
| 777 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 778 | Pepper Development, LLC | Clarksburg, WV 26302 | Oil & Gas Operator | Dec 2021 |
| 779 | Pepper Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1992 |
| 780 | Percussion Petroleum Oper II,LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2023 |
| 781 | Percussion Petroleum Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2019 |
| 782 | Perdido Energy Louisiana, LLC | | Oil & Gas Operator | Dec 2024 |
| 783 | Perdido Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 784 | Perdue-Davidson Oil Co | | Oil & Gas Operator | Dec 2021 |
| 785 | Perdura Energy L.L.C. | | Oil & Gas Operator | Apr 2018 |
| 786 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 787 | Peregrine Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Jul 1999 |
| 788 | Peregrine Petroleum Corp | Oklahoma City, OK 73116-7639 | Oil & Gas Operator | May 2020 |
| 789 | Peregrine Petroleum Partners, LTD | | Oil & Gas Operator | Oct 2021 |
| 790 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |
| 791 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 792 | Perera Ray & Den | | Oil Operator | Sep 1994 |
| 793 | Perez, H. F. | Alice, TX 78332 | Oil & Gas Operator | May 2023 |
| 794 | Perfection Oil & Gas Co | | Gas Operator | Sep 1937 |
| 795 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Oct 2024 |
| 796 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2025 |
| 797 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | Jun 2025 |
| 798 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2025 |
| 799 | Pergerson Energy, L.L.C. | Richmond, VA 23225 | Oil Operator | Jun 2025 |
| 800 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |