| 21701 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 21702 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 21703 | Penn, G. R. Production Co. | McPherson, KS 67460 | Gas Operator | Nov 1997 |
| 21704 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 21705 | Pennaco Energy Incorporated | Gillette, WY 82718 | Oil & Gas Operator | Feb 2021 |
| 21706 | Pennant Dev. And Prod., LLC | Midland, TX 79702 | Oil Operator | Jun 2026 |
| 21707 | Pennant Energy LLC | Oklahoma City, OK 73116 | Oil Operator | Dec 2024 |
| 21708 | Pennant Oil & Gas LLC | Oklahma City, OK 73159-6905 | Oil & Gas Operator | Jan 2024 |
| 21709 | Pennant Petroleum Corporation | | Oil Operator | Dec 2002 |
| 21710 | Pennartz Productions, LLC. | Jacksboro, TX 76458 | Oil Operator | Feb 2026 |
| 21711 | Penneco Exploration Company Of Wyo LLC | Delmont, PA 15626 | Oil Operator | Aug 2021 |
| 21712 | Penneco Oil Company, Inc. | Delmont, PA 15626-2408 | Oil & Gas Operator | Dec 2025 |
| 21713 | Pennenergy Resources LLC | Pittsburgh, PA 15275-1063 | Oil & Gas Operator | Mar 2026 |
| 21714 | Penner Energy Inc | Oklahoma City, OK 73120-1930 | Oil & Gas Operator | Mar 2026 |
| 21715 | Pennfield Energy LLC | Erie, PA 16510-4760 | Oil & Gas Operator | Dec 2021 |
| 21716 | Pennhills Resources LLC | MT. Jewett, PA 16740 | Oil & Gas Operator | Mar 2026 |
| 21717 | Pennine Resc Inc | | Oil Operator | Sep 1992 |
| 21718 | Pennington Oil & Gas Int, LLC | | Oil & Gas Operator | Dec 2024 |
| 21719 | Pennington Operating Company, LLC | | Oil & Gas Operator | Jul 2020 |
| 21720 | Pennington, W. L., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 1996 |
| 21721 | Pennmark Resources Company | Edmond, OK 73013 | Oil & Gas Operator | Mar 2026 |
| 21722 | Penntex Petroleum Corporation | Austin, TX 78731 | Oil & Gas Operator | Jun 2026 |
| 21723 | Penntex Resources, L.P. | State College, PA 16803 | Oil & Gas Operator | Mar 2016 |
| 21724 | Penny, Ralph E. | White Plains, NY 10601 | Oil & Gas Operator | Jul 2023 |
| 21725 | Pennzenergy | Houston, TX 77252 | Oil & Gas Operator | Dec 1986 |
| 21726 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 21727 | Pennzenergy Explor & Prod LLC | | Oil & Gas Operator | Dec 1999 |
| 21728 | Pennzenergy Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 21729 | Pennzoil Company | Midland, TX 79710-0090 | Oil & Gas Operator | Mar 2000 |
| 21730 | Pennzoil E & P & M H Marr | | Oil & Gas Operator | Sep 1993 |
| 21731 | Pennzoil E & P Co - Arco | | Oil & Gas Operator | Dec 1993 |
| 21732 | Pennzoil E & P Co - Clark Oil | | Oil & Gas Operator | Apr 1980 |
| 21733 | Pennzoil E & P Co Et Al | | Oil & Gas Operator | Feb 1999 |
| 21734 | Pennzoil E & P Co-Sohio Et Al | | Oil & Gas Operator | Jun 1991 |
| 21735 | Pennzoil E & P Co-Sohio Petr | | Oil & Gas Operator | Feb 1999 |
| 21736 | Pennzoil Expl & Prod Co -TX | | Oil & Gas Operator | May 1993 |
| 21737 | Pennzoil Expl & Prod Co. -MS | | Oil Operator | Jan 1988 |
| 21738 | Pennzoil Explor & Prod Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2000 |
| 21739 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 21740 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 21741 | Pennzoil Prod Co | Vienna, WV 26105-2141 | Oil & Gas Operator | Dec 2000 |
| 21742 | Pennzoil Producing Company | | Oil & Gas Operator | Oct 1992 |
| 21743 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 2026 |
| 21744 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Jun 2026 |
| 21745 | Pense Brothers Drilling | | Oil Operator | Dec 1998 |
| 21746 | Pentad Development Corp. (A) | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 21747 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 21748 | Pentarch Petroleum | | Oil Operator | Mar 2026 |
| 21749 | Pentergy Operating, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Jun 2026 |
| 21750 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 21751 | Pentex Operating Company | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 1994 |
| 21752 | Penton And Penton | | Oil & Gas Operator | Jan 1983 |
| 21753 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 21754 | Penwell South Operating LLC | Houston, TX 77269 | Oil & Gas Operator | Jun 2026 |
| 21755 | Peoco LLC | | Gas Operator | Feb 2026 |
| 21756 | Peoples Bank & Trust Company | McPherson, KS 67460 | Oil Operator | Jan 2013 |
| 21757 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 21758 | Peoples Energy Production-Texas, L.P. | Houston, TX 77010 | Oil & Gas Operator | Oct 2007 |
| 21759 | Peoples Gas Co LLC | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2005 |
| 21760 | Peoples Natural Gas Co LLC | Pittsburgh, PA 15212 | Gas Operator | Dec 2016 |
| 21761 | Peoples Oil, LLC | Ottawa, KS 66067 | Oil Operator | Feb 2026 |
| 21762 | Pep Drilling LLC | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2024 |
| 21763 | Pepin Oil Co | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2013 |
| 21764 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 21765 | Pepper Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1992 |
| 21766 | Percussion Petroleum Oper II,LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2023 |
| 21767 | Percussion Petroleum Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2019 |
| 21768 | Perdido Energy Louisiana, LLC | | Oil & Gas Operator | Dec 2024 |
| 21769 | Perdido Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 21770 | Perdue-Davidson Oil Co | | Oil & Gas Operator | Dec 2021 |
| 21771 | Perdura Energy L.L.C. | | Oil & Gas Operator | Apr 2018 |
| 21772 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 21773 | Peregrine Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Jul 1999 |
| 21774 | Peregrine Petroleum Corp | Oklahoma City, OK 73116-7639 | Oil & Gas Operator | May 2020 |
| 21775 | Peregrine Petroleum Partners, LTD | | Oil & Gas Operator | Oct 2021 |
| 21776 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 21777 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 21778 | Perera Ray & Den | | Oil Operator | Sep 1994 |
| 21779 | Perez, H. F. | Alice, TX 78332 | Oil & Gas Operator | May 2023 |
| 21780 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Sep 2025 |
| 21781 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Mar 2026 |
| 21782 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | Jun 2026 |
| 21783 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Mar 2026 |
| 21784 | Pergerson Energy, L.L.C. | Richmond, VA 23225 | Oil Operator | Jun 2026 |
| 21785 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 21786 | Periscope Operating LLC | McKinney, TX 75069 | Oil & Gas Operator | Jun 2020 |
| 21787 | Perkins & Perkins Oil Co. Inc. | Allegany, NY 14706 | Oil & Gas Operator | Dec 2024 |
| 21788 | Perkins Energy Company | Duncan, OK 73533-3853 | Oil & Gas Operator | Mar 2026 |
| 21789 | Perkins Mike | Velma, OK 73091 | Oil & Gas Operator | Jan 2006 |
| 21790 | Perkins Nova | Atwood, OK 74827-9738 | Oil Operator | Feb 2014 |
| 21791 | Perkins Oil & Gas Inc | Pennsboro, WV 26415-0547 | Oil & Gas Operator | Dec 2021 |
| 21792 | Perkins Oil Comp | | Oil Operator | Nov 1988 |
| 21793 | Perkins Oil Ente | | Oil & Gas Operator | Dec 1995 |
| 21794 | Perkins Oil Enterprises, Inc. | Howard, KS 67349 | Oil & Gas Operator | Jan 2025 |
| 21795 | Perkins Oil Properties | | Oil & Gas Operator | Nov 2024 |
| 21796 | Perkins Production Company LLC | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 21797 | Perkins, Bobby R | | Oil Operator | Mar 2017 |
| 21798 | Perkins, Don & Assoc, Inc | | Oil Operator | Dec 2011 |
| 21799 | Perkins, Earl | | Oil & Gas Operator | Aug 2013 |
| 21800 | Perkins, Eugene O. | Boerne, TX 78015 | Oil & Gas Operator | Jun 2026 |