| 1701 | Dorchester Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 2001 |
| 1702 | Dorchester Hugoton LTD | Garland, TX 75042-8212 | Oil & Gas Operator | Mar 2004 |
| 1703 | Dorchester Minerals Operating LP | Dallas, TX 75219 | Oil & Gas Operator | Jun 2022 |
| 1704 | Dorchester Resources LP | Oklahoma City, OK 73154-8879 | Oil & Gas Operator | Aug 2021 |
| 1705 | Dorey Oil Corporation | Healdton, OK 73438-0856 | Oil Operator | Apr 2014 |
| 1706 | Dorfs Drilling Company | Waurika, OK 73573 | Oil & Gas Operator | Nov 2024 |
| 1707 | Dotson Jack M Operating Co | Norman, OK 73072-6649 | Oil Operator | Oct 1993 |
| 1708 | Double "C" Energy | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 1709 | Double C Oil & Gas LLC | Jenks, OK 74037-6946 | Oil Operator | Dec 2025 |
| 1710 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | Sep 2026 |
| 1711 | Double D Oil Co | Winfield, KS 67156 | Oil Operator | Apr 2026 |
| 1712 | Double Eagle Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Jan 2000 |
| 1713 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Sep 2026 |
| 1714 | Double G Oil LLC | | Oil Operator | May 2026 |
| 1715 | Double H Petroleum Corporation | Tulsa, OK 74136-5414 | Oil & Gas Operator | May 2006 |
| 1716 | Double J Oil Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Jun 2026 |
| 1717 | Double R Petroleum | | Oil & Gas Operator | Sep 2004 |
| 1718 | Doug And Janene Risenhoover Oil And Gas LLC | Cushing, OK 74023 | Oil Operator | Jun 2026 |
| 1719 | Douglas Fairbanks Holdings LLC | Pine Hurst, TX 77362-9998 | Oil & Gas Operator | Apr 2026 |
| 1720 | Douglas Investments Inc | Fort Worth, TX 76137 | Oil Operator | Jan 2020 |
| 1721 | Douglas Oil & Gas Co Inc | Ada, OK 74820 | Oil Operator | Apr 2014 |
| 1722 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 1723 | Dove Investments LLC | Wetumka, OK 74883 | Oil Operator | Apr 2026 |
| 1724 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 1725 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 1726 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 1727 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Jun 2026 |
| 1728 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | May 2026 |
| 1729 | Draw Oil & Gas Inc | | Oil & Gas Operator | Jun 1995 |
| 1730 | DRG Energy Inc | Norman, OK 73026-3171 | Oil & Gas Operator | May 2026 |
| 1731 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 1732 | Drummond Upstream LLC | Tulsa, OK 74104 | Oil & Gas Operator | May 2026 |
| 1733 | Drummond, F F | | Oil Operator | May 2026 |
| 1734 | Drumright Well Service Inc | Oilton, OK 74052 | Oil & Gas Operator | Jun 2026 |
| 1735 | Dryes Corner LLC | Oklahoma City, OK 73118 | Oil Operator | Mar 2026 |
| 1736 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 1737 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 1738 | Dublin Petroleum Corporation | Enid, OK 73702-6029 | Oil & Gas Operator | Jun 2026 |
| 1739 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | May 2026 |
| 1740 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | May 2026 |
| 1741 | Duco Energy LLC | Tulsa, OK 74145-4514 | Oil & Gas Operator | Mar 2015 |
| 1742 | Duffer William R | Edmond, OK 73034-6761 | Oil & Gas Operator | Aug 2018 |
| 1743 | Duggan Stephen F | Boston, MA 2131 | Oil & Gas Operator | Jun 2010 |
| 1744 | Dukes T F | | Oil & Gas Operator | Apr 2007 |
| 1745 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 1746 | Duncan Jr J Walter | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2016 |
| 1747 | Duncan Oil & Gas Inc | Norman, OK 73072 | Oil & Gas Operator | Sep 2020 |
| 1748 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 1749 | Duncan Ronald R | Okemah, OK 74859-9603 | Oil & Gas Operator | Aug 2023 |
| 1750 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 1751 | Dune Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 1993 |
| 1752 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Sep 2026 |
| 1753 | Dunkin Oil And Gas LLC | Wynewood, OK 73098-9196 | Oil Operator | Apr 2026 |
| 1754 | Dunlap Drilling And Producing, Inc | Glenpool, OK 74033-4206 | Oil & Gas Operator | May 2026 |
| 1755 | Dunlap Oil Company | Bristow, OK 74010 | Oil & Gas Operator | May 2026 |
| 1756 | Dunlap Well Service Inc | Haskell, OK 74436 | Oil & Gas Operator | Sep 1993 |
| 1757 | Dunn Energy LLC | Skiatook, OK 74070-4046 | Oil Operator | Sep 2022 |
| 1758 | Dunn'S Oil And Gas Lease Management LLC | Ardmore, OK 73401 | Oil & Gas Operator | May 2026 |
| 1759 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 1760 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 1761 | Durango Energy Inc | Chickasha, OK 73023 | Oil Operator | Dec 1999 |
| 1762 | Durango Exploration LLC | Oklahoma City, OK 73120-5309 | Oil & Gas Operator | Jun 2026 |
| 1763 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Sep 2026 |
| 1764 | Duroc Exploration LLC | Bixby, OK 74008 | Oil & Gas Operator | May 2026 |
| 1765 | Durossette Bill D | Haskell, OK 74436-1350 | Oil & Gas Operator | Jul 2004 |
| 1766 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 1767 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 1768 | DWJS Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Sep 2024 |
| 1769 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 1770 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74107 | Oil & Gas Operator | Jun 2026 |
| 1771 | Dyer Oil & Gas Group LLC | Tulsa, OK 74137 | Oil Operator | May 2026 |
| 1772 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 1773 | Dyno Energy LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2026 |
| 1774 | E & E Enterprises | Enid, OK 73703-1420 | Oil & Gas Operator | Nov 2014 |
| 1775 | E & S Resources LLC | Crescent, OK 73028 | Oil & Gas Operator | Apr 2026 |
| 1776 | E Lyle Johnson Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2026 |
| 1777 | E R Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 1778 | E. T. S. Enterprises, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jul 1996 |
| 1779 | E2 Operating LLC | Tulsa, OK 74135 | Oil & Gas Operator | Sep 2026 |
| 1780 | E4 Production LLC | Comanche, OK 73529 | Oil Operator | Jun 2026 |
| 1781 | Ea Petroleum Inc | Norman, OK 73072-4147 | Oil & Gas Operator | May 2006 |
| 1782 | Eager Oil Company | Stanhope, NJ 07874-0577 | Oil Operator | Jun 2014 |
| 1783 | Eagle Creek Resources, LLC | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2025 |
| 1784 | Eagle Energy Production LLC | Tulsa, OK 74136-1935 | Oil & Gas Operator | Mar 2020 |
| 1785 | Eagle Exploration Production LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 1786 | Eagle Hydrocarbons Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 2020 |
| 1787 | Eagle Minerals & Oil Prop Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2002 |
| 1788 | Eagle Minerals Inc | Tulsa, OK 74119 | Oil Operator | Jun 1998 |
| 1789 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2026 |
| 1790 | Eagle Oil & Gas Properties Inc | Pleasant Prarie, WI 53158-4719 | Oil & Gas Operator | Jan 2016 |
| 1791 | Eagle Operating Company | Tulsa, OK 74146-5730 | Oil & Gas Operator | Aug 2020 |
| 1792 | Eagle Petroleum Corporation | Holliday, TX 76366 | Oil & Gas Operator | Oct 2005 |
| 1793 | Eagle Resources Inc | Claremore, OK 74019-5398 | Oil & Gas Operator | May 2013 |
| 1794 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | May 2026 |
| 1795 | Eagle Road Oil LLC | Tulsa, OK 74103-3312 | Oil & Gas Operator | May 2026 |
| 1796 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | May 2026 |
| 1797 | Eakin Exploration Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2016 |
| 1798 | Eakin J L | Bartlesville, OK 74136 | Oil & Gas Operator | Feb 2020 |
| 1799 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Jun 2026 |
| 1800 | Earl-Le Oil Company | Bristow, OK 74010-9547 | Oil & Gas Operator | Jun 2026 |