| 1801 | Draw Oil & Gas Inc | | Oil & Gas Operator | Jun 1995 |
| 1802 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | Jan 2025 |
| 1803 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 1804 | Drummond Upstream LLC | Tulsa, OK 74104 | Oil Operator | Jan 2025 |
| 1805 | Drummond, F F | | Oil Operator | Jan 2025 |
| 1806 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2025 |
| 1807 | Dryes Corner LLC | Crescent, OK 73028 | Oil Operator | Jul 2023 |
| 1808 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 1809 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 1810 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Feb 2025 |
| 1811 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | Feb 2025 |
| 1812 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jan 2025 |
| 1813 | Duck Production Management LLC | Konawa, OK 74849 | Oil Operator | Feb 2025 |
| 1814 | Duco Energy LLC | Tulsa, OK 74145-4514 | Oil & Gas Operator | Mar 2015 |
| 1815 | Duesler Welding Service | | Oil Operator | Mar 2007 |
| 1816 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 1817 | Duggan Stephen F | Boston, MA 2131 | Oil & Gas Operator | Jun 2010 |
| 1818 | Duggins Equipment Inc | Woodward, OK 73802-1213 | Gas Operator | Jan 2025 |
| 1819 | Dukes T F | | Oil & Gas Operator | Apr 2007 |
| 1820 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 1821 | Duncan Energy Inc | | Oil & Gas Operator | Mar 2014 |
| 1822 | Duncan Jr J Walter | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2016 |
| 1823 | Duncan Oil & Gas Inc | Norman, OK 73072 | Oil & Gas Operator | Sep 2020 |
| 1824 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 1825 | Duncan Petroleum Corp | Velma, OK 73091 | Oil & Gas Operator | Oct 1991 |
| 1826 | Duncan Ronald R | Okemah, OK 74859-9603 | Oil & Gas Operator | Aug 2023 |
| 1827 | Duncan W T | | Oil Operator | Nov 1998 |
| 1828 | Duncan Walter | | Oil & Gas Operator | May 2019 |
| 1829 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 1830 | Dune Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 1993 |
| 1831 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Apr 2025 |
| 1832 | Dunkin Oil And Gas LLC | Wynewood, OK 73098-9196 | Oil Operator | Feb 2025 |
| 1833 | Dunlap Drilling & Prod Inc | Glenpool, OK 74033-4206 | Oil & Gas Operator | Jan 2025 |
| 1834 | Dunlap Jr E | | Oil & Gas Operator | May 1997 |
| 1835 | Dunlap Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 1836 | Dunlap Well Service Inc | Haskell, OK 74436 | Oil & Gas Operator | Sep 1993 |
| 1837 | Dunn Energy LLC | Skiatook, OK 74070-4046 | Oil Operator | Sep 2022 |
| 1838 | Dunn'S Oil And Gas Lease Management LLC | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2025 |
| 1839 | Dunn'S Tank Service Inc | Fox, OK 73435-0232 | Oil Operator | Sep 2014 |
| 1840 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 1841 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 1842 | Durango Energy Inc | Chickasha, OK 73023 | Oil Operator | Dec 1999 |
| 1843 | Durango Exploration LLC | Oklahoma City, OK 73120-5309 | Oil & Gas Operator | Feb 2025 |
| 1844 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Apr 2025 |
| 1845 | Durossette Bill D | Haskell, OK 74436-1350 | Oil & Gas Operator | Jul 2004 |
| 1846 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 1847 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 1848 | DW Oil & Gas LLC | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2025 |
| 1849 | DWJS Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Sep 2024 |
| 1850 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 1851 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74107 | Oil & Gas Operator | Jan 2025 |
| 1852 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 1853 | Dyno Energy LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2025 |
| 1854 | E & E Enterprises | Enid, OK 73703-1420 | Oil & Gas Operator | Nov 2014 |
| 1855 | E & S Resources LLC | Crescent, OK 73028 | Oil & Gas Operator | Dec 2024 |
| 1856 | E Lyle Johnson Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2025 |
| 1857 | E R Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 1858 | E. T. S. Enterprises, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jul 1996 |
| 1859 | E2 Operating LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 1860 | E4 Production LLC | Comanche, OK 73529-7100 | Oil Operator | Feb 2025 |
| 1861 | Ea Petroleum Inc | Norman, OK 73072-4147 | Oil & Gas Operator | May 2006 |
| 1862 | Eager Oil Company | Stanhope, NJ 07874-0577 | Oil Operator | Jun 2014 |
| 1863 | Eagle Creek Resources, LLC | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2023 |
| 1864 | Eagle Energy | Midland, TX 79710 | Oil & Gas Operator | Sep 1999 |
| 1865 | Eagle Energy Production LLC | Tulsa, OK 74136-1935 | Oil & Gas Operator | Mar 2020 |
| 1866 | Eagle Energy PTR I LP | Houston, TX 77064 | Oil & Gas Operator | Feb 2015 |
| 1867 | Eagle Exploration Production LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 1868 | Eagle Gas Marketing Co | Oklahoma City, OK 73114-2202 | Oil & Gas Operator | Nov 2022 |
| 1869 | Eagle Hydrocarbons Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 2020 |
| 1870 | Eagle Minerals & Oil Prop Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2002 |
| 1871 | Eagle Minerals Inc | Tulsa, OK 74119 | Oil Operator | Jun 1998 |
| 1872 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 1873 | Eagle Oil & Gas Properties Inc | Pleasant Prarie, WI 53158-4719 | Oil & Gas Operator | Jan 2016 |
| 1874 | Eagle Operating Company | Tulsa, OK 74146-5730 | Oil & Gas Operator | Aug 2020 |
| 1875 | Eagle Petroleum Corporation | Holliday, TX 76366 | Oil & Gas Operator | Oct 2005 |
| 1876 | Eagle Resources Inc | Claremore, OK 74019-5398 | Oil & Gas Operator | May 2013 |
| 1877 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Jan 2025 |
| 1878 | Eagle Road Oil LLC | Tulsa, OK 74103-3312 | Oil & Gas Operator | Jan 2025 |
| 1879 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Jan 2025 |
| 1880 | Eakin Exploration Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2016 |
| 1881 | Eakin J L | Bartlesville, OK 74136 | Oil & Gas Operator | Feb 2020 |
| 1882 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Nov 2024 |
| 1883 | Earl-Le Oil Company | Bristow, OK 74010-9547 | Oil & Gas Operator | Feb 2025 |
| 1884 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2025 |
| 1885 | Earnest Russel | Okmulgee, OK 74447-1216 | Oil & Gas Operator | Jan 2007 |
| 1886 | Earth Oil Inc | Skiatook, OK 74070-0578 | Oil & Gas Operator | Oct 2008 |
| 1887 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2025 |
| 1888 | Eason Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2012 |
| 1889 | East Fitts Project LTD PTNSHP | Ada, OK 74820 | Oil & Gas Operator | Dec 2002 |
| 1890 | Eastbrook Of Fairview Inc | Fairview, OK 73737-0148 | Oil Operator | Aug 2013 |
| 1891 | Eastern Energy Dev Corporation | Oxford, CT 06478-1009 | Oil & Gas Operator | Apr 2020 |
| 1892 | Eastern Oilwell Cement Co Inc | Seminole, OK 74818-1704 | Oil & Gas Operator | Aug 2008 |
| 1893 | Eastern Operating Company LLC | Gans, OK 74936 | Gas Operator | Jan 2025 |
| 1894 | Eastern Petroleum Company | Girard, OH 44420 | Oil & Gas Operator | Sep 1995 |
| 1895 | Easterwood D E | Duncan, OK 73533-1013 | Oil & Gas Operator | Jun 2001 |
| 1896 | Eastex Energy LLC | Shawnee, OK 74804 | Oil Operator | Jan 2025 |
| 1897 | Eastok Energy Partners LLC | Edmond, OK 73013-1044 | Oil & Gas Operator | Jan 2025 |
| 1898 | Eastok Pipeline LLC | Midland, TX 79710 | Gas Operator | May 2019 |
| 1899 | Eberle C Fred | Blackwell, OK 74631 | Oil Operator | Jun 1993 |
| 1900 | Eberly & Meade | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2002 |