| 21801 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 21802 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 21803 | Pennzoil Prod Co | Vienna, WV 26105-2141 | Oil & Gas Operator | Dec 2000 |
| 21804 | Pennzoil Producing Company | | Oil & Gas Operator | Oct 1992 |
| 21805 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2026 |
| 21806 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Apr 2026 |
| 21807 | Pense Brothers Drilling | | Oil Operator | Dec 1998 |
| 21808 | Pentad Development Corp. (A) | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 21809 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 21810 | Pentarch Petroleum | | Oil Operator | Dec 2025 |
| 21811 | Pentergy Operating, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Apr 2026 |
| 21812 | Pentex Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2003 |
| 21813 | Pentex Operating Company | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 1994 |
| 21814 | Penton And Penton | | Oil & Gas Operator | Jan 1983 |
| 21815 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 21816 | Penwell South Operating LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 21817 | Peoco LLC | | Gas Operator | Dec 2025 |
| 21818 | Peoples Bank & Trust Company | McPherson, KS 67460 | Oil Operator | Jan 2013 |
| 21819 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 21820 | Peoples Energy Production-Texas, L.P. | Houston, TX 77010 | Oil & Gas Operator | Oct 2007 |
| 21821 | Peoples Gas Co LLC | Butler, PA 16001-4904 | Oil & Gas Operator | Dec 2005 |
| 21822 | Peoples Natural Gas Co LLC | Pittsburgh, PA 15212 | Gas Operator | Dec 2016 |
| 21823 | Peoples Oil, LLC | Ottawa, KS 66067 | Oil Operator | Dec 2025 |
| 21824 | Pep Drilling LLC | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2024 |
| 21825 | Pepin Oil Co | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2013 |
| 21826 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 21827 | Pepper Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1992 |
| 21828 | Percussion Petroleum Oper II,LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2023 |
| 21829 | Percussion Petroleum Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2019 |
| 21830 | Perdido Energy Louisiana, LLC | | Oil & Gas Operator | Dec 2024 |
| 21831 | Perdido Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Apr 2026 |
| 21832 | Perdue-Davidson Oil Co | | Oil & Gas Operator | Dec 2021 |
| 21833 | Perdura Energy L.L.C. | | Oil & Gas Operator | Apr 2018 |
| 21834 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 21835 | Peregrine Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Jul 1999 |
| 21836 | Peregrine Petroleum Corp | Oklahoma City, OK 73116-7639 | Oil & Gas Operator | May 2020 |
| 21837 | Peregrine Petroleum Partners, LTD | | Oil & Gas Operator | Oct 2021 |
| 21838 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 21839 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 21840 | Perera Ray & Den | | Oil Operator | Sep 1994 |
| 21841 | Perez, H. F. | Alice, TX 78332 | Oil & Gas Operator | May 2023 |
| 21842 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Sep 2025 |
| 21843 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2026 |
| 21844 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | Apr 2026 |
| 21845 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Feb 2026 |
| 21846 | Pergerson Energy, L.L.C. | Richmond, VA 23225 | Oil Operator | Apr 2026 |
| 21847 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 21848 | Periscope Operating LLC | McKinney, TX 75069 | Oil & Gas Operator | Jun 2020 |
| 21849 | Perkins & Perkins Oil Co. Inc. | Allegany, NY 14706 | Oil & Gas Operator | Dec 2024 |
| 21850 | Perkins Energy Company | Duncan, OK 73533-3853 | Oil & Gas Operator | Feb 2026 |
| 21851 | Perkins Mike | Velma, OK 73091 | Oil & Gas Operator | Jan 2006 |
| 21852 | Perkins Nova | Atwood, OK 74827-9738 | Oil Operator | Feb 2014 |
| 21853 | Perkins Oil & Gas Inc | Pennsboro, WV 26415-0547 | Oil & Gas Operator | Dec 2021 |
| 21854 | Perkins Oil Comp | | Oil Operator | Nov 1988 |
| 21855 | Perkins Oil Ente | | Oil & Gas Operator | Dec 1995 |
| 21856 | Perkins Oil Enterprises, Inc. | Howard, KS 67349 | Oil & Gas Operator | Jan 2025 |
| 21857 | Perkins Oil Properties | | Oil & Gas Operator | Nov 2024 |
| 21858 | Perkins Production Company LLC | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 21859 | Perkins, Bobby R | | Oil Operator | Mar 2017 |
| 21860 | Perkins, Don & Assoc, Inc | | Oil Operator | Dec 2011 |
| 21861 | Perkins, Earl | | Oil & Gas Operator | Aug 2013 |
| 21862 | Perkins, Eugene O. | Boerne, TX 78015 | Oil & Gas Operator | Apr 2026 |
| 21863 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 21864 | Perlman,I.H.Oil & Gas Properties | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 21865 | Permeator Corp. | | Oil Operator | Sep 1990 |
| 21866 | Permex Petroleum Company, LLC | Dallas, TX 75201 | Oil & Gas Operator | Mar 2024 |
| 21867 | Permex Petroleum Corporation | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 21868 | Permian Basin Oil Corporation | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 21869 | Permian Deep Rock Oil Co., LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 21870 | Permian Development, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 21871 | Permian Legend LLC | San Marcos, TX 78666 | Oil Operator | Apr 2026 |
| 21872 | Permian Natural Resources | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 21873 | Permian Pacific Resources, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Aug 2003 |
| 21874 | Permian Resources Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 21875 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 21876 | Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 21877 | Permian Roustabout & Oilfield Services LLC | Blanchard, OK 73010 | Oil & Gas Operator | Feb 2024 |
| 21878 | Permian Services Co., LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 21879 | Permian Solutions LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 21880 | Permian Surveys | Midland, TX 79707 | Oil & Gas Operator | Oct 1999 |
| 21881 | Permian West Corp. | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 21882 | Permok Oil Inc | Shawnee Mission, KS 662082110 | Oil & Gas Operator | Feb 2013 |
| 21883 | Perna Oil & Gas LLC | | Oil & Gas Operator | Nov 2024 |
| 21884 | Pero Farms Inc. | Brant, NY 14027 | Gas Operator | Dec 2024 |
| 21885 | Peroco Oil & Gas | Killbuck, OH 44637 | Oil & Gas Operator | Dec 1987 |
| 21886 | Perrin Oil Compa | | Oil & Gas Operator | Jun 1985 |
| 21887 | Perrin, Mary L | | Oil & Gas Operator | Oct 2005 |
| 21888 | Perry C A And Son Inc | | Oil & Gas Operator | Dec 1994 |
| 21889 | Perry L Larson Operating Co | Dallas, TX 75231-4712 | Oil & Gas Operator | Feb 2026 |
| 21890 | Perry Operating Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 21891 | Perry Petroleum | | Oil Operator | Jun 1993 |
| 21892 | Perry Point, Inc. | | Oil Operator | Mar 2022 |
| 21893 | Perry Producing Company, Inc. | Ackerly, TX 79713 | Oil & Gas Operator | Apr 2026 |
| 21894 | Perry Production Company Inc | Perry, OK 73077-0412 | Oil & Gas Operator | May 2006 |
| 21895 | Perry, J. R. & Co. | Haskell, TX 79521 | Oil & Gas Operator | Jul 2015 |
| 21896 | Perry, James D | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 21897 | Perry, Robert And Elizabeth | Dewittville, NY 14728 | Gas Operator | Dec 2024 |
| 21898 | Perryman Exp. And Prod., LLC | Athens, TX 75751 | Oil & Gas Operator | Apr 2026 |
| 21899 | Perryman Operating Company | Athens, TX 75751 | Oil & Gas Operator | Apr 2026 |
| 21900 | Perryton Operating Co., Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2026 |