| 1801 | Gishco Petroleum, Inc. | | Oil & Gas Operator | Apr 1992 |
| 1802 | Glacier Park Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2001 |
| 1803 | Gladney Energy Partners, LLC | | Oil & Gas Operator | Dec 2024 |
| 1804 | Glass Drilling Co. | | Oil Operator | Jan 1987 |
| 1805 | Glasscock Drilling, Inc. | | Oil & Gas Operator | Dec 1977 |
| 1806 | Glassell Producing Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 1807 | Glen D. Loe | | Oil & Gas Operator | May 1993 |
| 1808 | Glen D. Loe Etal | | Oil Operator | Jul 1989 |
| 1809 | Glenda Petroleum Corp. | | Gas Operator | Oct 1991 |
| 1810 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 1811 | Global Operating Co. Inc. | | Oil Operator | Dec 2008 |
| 1812 | GMJ Of La, Inc. | | Oil & Gas Operator | May 1998 |
| 1813 | GMX Resources, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2014 |
| 1814 | GNR Production Services Inc | | Oil Operator | Oct 2001 |
| 1815 | Godfrey & Riley | | Gas Operator | May 1988 |
| 1816 | Goldco Operating LLC | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 1817 | Golden Resources Corporation | Dallas, TX 75238 | Oil & Gas Operator | Dec 1998 |
| 1818 | Goldking Capital Management, LLC | | Oil & Gas Operator | Nov 2024 |
| 1819 | Goldking Onshore Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 1820 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 1821 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 1822 | Goldking-Lakeshore | | Oil & Gas Operator | Oct 1985 |
| 1823 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 1824 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 1825 | Goldsberry Rodessa, L.L.C. | | Oil & Gas Operator | Nov 1998 |
| 1826 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Jul 2026 |
| 1827 | Good Shepard Resources, L.L.C. | | Gas Operator | Dec 2024 |
| 1828 | Goodrich Drillers, LLC | | Oil & Gas Operator | Nov 2014 |
| 1829 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 1830 | Goodrich Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2006 |
| 1831 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 1832 | Goodrich Petroleum Corporation | | Oil & Gas Operator | Sep 1996 |
| 1833 | Goodrich-Anderson | | Oil & Gas Operator | Jul 1988 |
| 1834 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jul 2026 |
| 1835 | Gossco, Inc. | | Oil & Gas Operator | Feb 1989 |
| 1836 | GPM, Inc. | | Oil & Gas Operator | Jun 1994 |
| 1837 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 1838 | Grady And Roppolo | | Oil & Gas Operator | Aug 1980 |
| 1839 | Graham Energy LTD | Houston, TX 77024 | Oil & Gas Operator | Mar 1994 |
| 1840 | Graham Expl LTD-DRLG PRNRSHP | | Oil & Gas Operator | Aug 1984 |
| 1841 | Graham Exploration, LTD. | | Oil & Gas Operator | Oct 1993 |
| 1842 | Graham Oil And Gas LTD | Covington, LA 70434-3134 | Oil & Gas Operator | Aug 2013 |
| 1843 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 1844 | Graham-McCormick Oper. PRTSHP. | | Oil & Gas Operator | Aug 1989 |
| 1845 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 1846 | Grand Gulf Production, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 1847 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | May 2026 |
| 1848 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jul 2026 |
| 1849 | Granja Corporation | | Oil & Gas Operator | Dec 2003 |
| 1850 | Gravel & Troegel-Petrofunds | | Oil & Gas Operator | Mar 1984 |
| 1851 | Gravtro, Inc. | | Oil Operator | Apr 1986 |
| 1852 | Gray Energy Corporation | | Oil & Gas Operator | May 1987 |
| 1853 | Grayrock Corp., The | Dallas, TX 75243 | Oil & Gas Operator | Dec 1999 |
| 1854 | Grease Exploration Incorporated | | Oil & Gas Operator | Dec 2024 |
| 1855 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 1856 | Great Scott, Inc. | | Oil & Gas Operator | Oct 1993 |
| 1857 | Great Southern - Joe Scates | | Oil Operator | Dec 1979 |
| 1858 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 1859 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 1860 | Great Yellowstone Corporation | | Oil & Gas Operator | Apr 1993 |
| 1861 | Grecian Gas Company | | Gas Operator | Dec 2002 |
| 1862 | Green Operating | | Oil Operator | Jun 2010 |
| 1863 | Green Production, LLC | | Oil & Gas Operator | Dec 2016 |
| 1864 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 1865 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 1866 | Greer Energy, Inc. | | Oil Operator | Dec 1996 |
| 1867 | Greka Am, Inc | Santa Maria, CA 93454 | Oil & Gas Operator | May 2013 |
| 1868 | Grenadier Energy Partners II,LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2020 |
| 1869 | Grey Oil Co | Pratt, KS 67124 | Oil & Gas Operator | Sep 2007 |
| 1870 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 1871 | Greystone Operating, Inc. | | Oil & Gas Operator | Nov 2009 |
| 1872 | Greystone Petroleum, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2026 |
| 1873 | Gribble Oil Company | | Oil & Gas Operator | Jun 1996 |
| 1874 | Griffin & Griffin Exploration LLC | | Oil & Gas Operator | Apr 2026 |
| 1875 | Griffin & Griffin Oil Co Inc | | Oil & Gas Operator | Jun 2001 |
| 1876 | Griffin Energy | | Oil & Gas Operator | May 1991 |
| 1877 | Griffin Operating | | Oil & Gas Operator | Mar 1995 |
| 1878 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2026 |
| 1879 | Griffin Southern Corp. | | Oil & Gas Operator | Jun 1983 |
| 1880 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2026 |
| 1881 | Grigsby-McCord Joint Account | | Oil Operator | Apr 1984 |
| 1882 | Grigsby-McCord Joint Acct Etal | | Oil Operator | Apr 1984 |
| 1883 | Grit Operating, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2023 |
| 1884 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 1885 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 1886 | Gruy Management Service Co. | | Oil & Gas Operator | Apr 1982 |
| 1887 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 1888 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Apr 2014 |
| 1889 | Gryphon Exploration Company | Mandeville, LA 70471 | Oil & Gas Operator | Aug 2009 |
| 1890 | GT Energy | | Oil & Gas Operator | Mar 1993 |
| 1891 | Guaranty Energy Corp. | | Oil & Gas Operator | Aug 1990 |
| 1892 | Guardian Oil Company | | Oil & Gas Operator | Aug 1985 |
| 1893 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |
| 1894 | Guernsey/Rosbottom | | Oil Operator | Apr 1989 |
| 1895 | Guido & Arnold | | Oil & Gas Operator | Feb 1982 |
| 1896 | Guido Energy Co & Guernsey Pet | | Oil Operator | Aug 1991 |
| 1897 | Gulf Coast Crude O&G Co., Inc. | | Oil & Gas Operator | May 1982 |
| 1898 | Gulf Exploration Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 1899 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 1900 | Gulf Outlet Resources, L.L.C. | | Oil & Gas Operator | Apr 2008 |