| 1801 | Primary Energy Co. | | Gas Operator | Jul 1999 |
| 1802 | Primary Fuels Inc | Midland, TX 79701-4410 | Oil & Gas Operator | Mar 1991 |
| 1803 | Primary Natural Resources III LLC | Tulsa, OK 74136-6351 | Oil & Gas Operator | May 2026 |
| 1804 | Primary Natural Resources Inc. | Tulsa, OK 74136-6351 | Oil & Gas Operator | Mar 2023 |
| 1805 | Prime Energy Corp | Charleston, WV 25301-1707 | Oil & Gas Operator | Sep 2015 |
| 1806 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 1807 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2026 |
| 1808 | Prime Rock Resources La LLC | | Oil & Gas Operator | Dec 2024 |
| 1809 | Prime Time Energy Investment Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 2025 |
| 1810 | Prime Time Oil & Gas Co., LTD. | Ruidoso, NM 88345 | Oil & Gas Operator | Mar 2003 |
| 1811 | Prime Western Development, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Dec 1998 |
| 1812 | Primera Energy, LLC | Longview, TX 75606 | Oil & Gas Operator | Mar 2016 |
| 1813 | Primero Operating, Inc. | Roswell, NM 88202 | Oil & Gas Operator | Jun 2022 |
| 1814 | Primewest Petroleum, Inc. | Centennial, CO 80111 | Oil & Gas Operator | Jan 2009 |
| 1815 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 1816 | Primo Petroleum, LLC | Austin, TX 78729 | Oil Operator | Dec 2019 |
| 1817 | Primos Oil & Gas Corp. | | Gas Operator | Dec 2001 |
| 1818 | Primos Production | | Oil & Gas Operator | Dec 2024 |
| 1819 | Primos-Pennzoil JV | | Gas Operator | Feb 2005 |
| 1820 | Primrose Jimmie | | Oil Operator | Feb 1998 |
| 1821 | Primrose Oil LLC | Oil Springs, KY 41238 | Oil & Gas Operator | Dec 2024 |
| 1822 | Primrose Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2007 |
| 1823 | Primrose Resources, LLC | Cedar Park, TX 78630 | Oil & Gas Operator | Jul 2026 |
| 1824 | Princ, Frank | Wilson, KS 67490 | Oil Operator | Oct 2025 |
| 1825 | Prince Brothers Drilling Co | Electra, TX 76360 | Oil & Gas Operator | Apr 2015 |
| 1826 | Prince Petroleum Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2014 |
| 1827 | Prince Properties, Inc. | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 1828 | Princess Three Corporation | Henderson, TX 75653 | Oil & Gas Operator | Apr 2020 |
| 1829 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Jul 2026 |
| 1830 | Princeton Natural Gas LLC | | Gas Operator | Dec 2025 |
| 1831 | Principal Oil Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2002 |
| 1832 | Principle Petroleum LLC | Dallas, TX 75313 | Oil Operator | May 2025 |
| 1833 | Pringle Operating Co. | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2015 |
| 1834 | Pringle Resources, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jul 2026 |
| 1835 | Prior, Ferrell L | | Oil & Gas Operator | Dec 2021 |
| 1836 | Priority Energy LLC | Summerland, CA 93067 | Oil & Gas Operator | Apr 2016 |
| 1837 | Priority Holdings LLC | Marlow, OK 73055 | Oil Operator | Apr 2026 |
| 1838 | Priority Oil & Gas LLC | Lakewood, CO 80227 | Gas Operator | Dec 2019 |
| 1839 | Priority Oil Company LLC | Luling, TX 78648 | Oil Operator | Jul 2026 |
| 1840 | Prisum Ventures | | Oil & Gas Operator | Oct 1995 |
| 1841 | Pritchard Engineering | | Oil & Gas Operator | Mar 1989 |
| 1842 | Pritz Maurice G | | Oil Operator | Oct 1990 |
| 1843 | Privateer Energy LLC | Warren, NJ 07059 | Oil Operator | Jul 2026 |
| 1844 | Prize Exploration & Prod, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 1845 | Prize Exploration, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 1846 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 1847 | Prize Petroleum, LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2012 |
| 1848 | Pro NM Energy Inc | Santa Fe, NM 87508 | Oil & Gas Operator | Oct 2015 |
| 1849 | Pro Oil & Gas Inc | Frankfort, IL 60423 | Oil & Gas Operator | May 2014 |
| 1850 | Pro- Gas, Inc. | Midland, TX 79711 | Oil & Gas Operator | Jul 2026 |
| 1851 | Pro-Energy Inc | Tulsa, OK 74136-5925 | Oil Operator | Jan 2026 |
| 1852 | Pro-Test, Inc. | Kilgore, TX 75663 | Oil Operator | Jul 2026 |
| 1853 | Pro. Energy I Resource, LLC | Haslet, TX 76052 | Oil Operator | Jul 2026 |
| 1854 | Pro3 Sulfur Solutions, Inc. | Russell, KS 67665 | Oil Operator | Feb 2026 |
| 1855 | Probe Exploration Company | Abilene, TX 79605 | Oil & Gas Operator | Jul 2026 |
| 1856 | Probe Offshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 1857 | Probe Oil Company | Midland, TX 79710 | Oil & Gas Operator | Jul 2016 |
| 1858 | Probity Operating, LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2014 |
| 1859 | Procell & Procell | | Oil & Gas Operator | Jan 2003 |
| 1860 | Proco | Wooster, OH 44691 | Oil Operator | Dec 1988 |
| 1861 | Proco Operating Co., Inc. | Graford, TX 76449 | Oil & Gas Operator | Jul 2026 |
| 1862 | Proctor Dale & Mildred | Wetumka, OK 74883-6272 | Gas Operator | Apr 2026 |
| 1863 | Producers Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 2000 |
| 1864 | Producers Engineering Company | Destin, FL 32541 | Oil & Gas Operator | Sep 1999 |
| 1865 | Producers Environmental Ser. Inc | Borger, TX 79008 | Oil & Gas Operator | Jul 2026 |
| 1866 | Producers Equipm | | Oil Operator | Dec 1996 |
| 1867 | Producers Gas Transmission Inc | | Oil Operator | Nov 2024 |
| 1868 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 1869 | Producers Operating Co Inc | Amarillo, TX 79105 | Oil & Gas Operator | Jul 2026 |
| 1870 | Producers Well Service, Inc. | Boling, TX 77420 | Oil & Gas Operator | Jul 2026 |
| 1871 | Producing Royalties Inc | Lubbock, TX BADADDR | Gas Operator | Aug 2004 |
| 1872 | Production Compa | | Oil Operator | Apr 1985 |
| 1873 | Production Consultants, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Feb 2017 |
| 1874 | Production Drill | | Oil Operator | Oct 1994 |
| 1875 | Production Drilling, Inc. | Hays, KS 67601 | Oil Operator | Mar 2026 |
| 1876 | Production Funds Inc | | Oil & Gas Operator | Nov 2001 |
| 1877 | Production Gathering Company, LP | Dallas, TX 75206 | Oil & Gas Operator | Jul 2026 |
| 1878 | Production Gauging Service Inc | | Oil Operator | Feb 1999 |
| 1879 | Production Maintenance Service | | Oil & Gas Operator | Jun 2020 |
| 1880 | Production Manag | | Oil Operator | Dec 1986 |
| 1881 | Production Management Associates | Plano, TX 75075 | Oil & Gas Operator | Jul 2026 |
| 1882 | Production Management Corp. | | Oil & Gas Operator | Jul 1987 |
| 1883 | Production Management Inc | | Oil & Gas Operator | Oct 2006 |
| 1884 | Production Marketing Assoc Inc | Plano, TX 75075 | Oil & Gas Operator | Jul 2026 |
| 1885 | Production Operators Of TX, LLC | Abilene, TX 79605 | Oil & Gas Operator | Jul 2026 |
| 1886 | Production Resources, Inc. | Castroville, TX 78009 | Oil & Gas Operator | Jul 2026 |
| 1887 | Production Service Co. | Lubbock, TX 79490 | Oil & Gas Operator | Oct 2015 |
| 1888 | Production Specialties Company | | Oil & Gas Operator | Dec 2003 |
| 1889 | Production Team | | Oil & Gas Operator | Sep 1991 |
| 1890 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Jul 2026 |
| 1891 | Professional Management GRP,Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 1999 |
| 1892 | Professional Management Serv | | Oil Operator | Mar 1991 |
| 1893 | Professional Oilfield Services, Inc. | Byesville, OH 43723 | Oil & Gas Operator | Dec 2021 |
| 1894 | Professional Petr. Servs, Inc. | | Oil Operator | Oct 2016 |
| 1895 | Profit Energy Company | Jerusalem, OH 43747 | Oil & Gas Operator | Dec 2025 |
| 1896 | Progas Operating, Inc | Red Rock, TX 78662 | Oil & Gas Operator | Jul 2026 |
| 1897 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Jul 2026 |
| 1898 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2026 |
| 1899 | Progress Petroleum Co. | | Oil & Gas Operator | Apr 1993 |
| 1900 | Progressive Gas Services Inc. | Houston, TX 77279 | Oil & Gas Operator | Feb 2002 |