| 1601 | Delek Energy Systems Us, Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 1602 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 1603 | Delong Oil & Gas Services, Inc. | Cushing, OK 74023 | Oil & Gas Operator | Sep 2025 |
| 1604 | Delong Ralph J | Sapulpa, OK 74066 | Oil & Gas Operator | Nov 2005 |
| 1605 | Delong, Ralph S | | Oil & Gas Operator | Jun 2025 |
| 1606 | Delphi Oil And Gas LLC | Macomb, OK 74852 | Oil Operator | May 2025 |
| 1607 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 1608 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 1609 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 1610 | Dem Operations Inc | Lamont, OK 74643-5010 | Oil & Gas Operator | Sep 2025 |
| 1611 | Demco Oil & Gas Company | Blackwell, OK 74631-4203 | Oil & Gas Operator | Aug 2025 |
| 1612 | Demier Oil Company | Tulsa, OK 74105-2128 | Oil & Gas Operator | Nov 2008 |
| 1613 | Deminex U S Oil Company | | Oil & Gas Operator | Jan 1998 |
| 1614 | Demo Oil Co | | Oil Operator | Jan 2020 |
| 1615 | Dempsey, Wayne L | | Oil & Gas Operator | Mar 2011 |
| 1616 | Denham Danny D | Kellyville, OK 74039 | Oil & Gas Operator | Aug 2025 |
| 1617 | Denham Operating Company | Tulsa, OK 74101-3627 | Oil & Gas Operator | Aug 2022 |
| 1618 | Dennett'S Inc | Enid, OK 73701-1851 | Oil & Gas Operator | Apr 2014 |
| 1619 | Denney Don | Citrus Heights, CA 95611-2473 | Oil Operator | Aug 2023 |
| 1620 | Dennis & Davis Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Dec 2025 |
| 1621 | Dennis Don Oil Company | Grady, OK 73569-9998 | Oil Operator | Jan 2002 |
| 1622 | Dennison George | Tulsa, OK 74112-6732 | Oil & Gas Operator | Apr 2020 |
| 1623 | Denveramerican Petro LLC | | Oil & Gas Operator | May 2006 |
| 1624 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 1625 | Derae Oil Company | Seminole, OK 74868-2617 | Oil & Gas Operator | Feb 1997 |
| 1626 | Derby Exploration LLC | Okc, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 1627 | Dernick Resources Inc | Dallas, TX 75204 | Oil & Gas Operator | Jan 2002 |
| 1628 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Aug 2025 |
| 1629 | Des Oil Inc/Osage Only | | Oil Operator | Nov 1998 |
| 1630 | Deshazo Production Company | Dewey, OK 74029-2811 | Oil & Gas Operator | Nov 2005 |
| 1631 | Deshields Gary | Atwood, OK 74827 | Oil Operator | Aug 2025 |
| 1632 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 1633 | Destin Corporation | Enid, OK 73702-2403 | Oil & Gas Operator | Mar 2005 |
| 1634 | Dette Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2015 |
| 1635 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 1636 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 1637 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 1638 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 1639 | Devon Resources Corporation | Jenks, OK 74037-3525 | Oil & Gas Operator | Aug 2025 |
| 1640 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 1641 | Dewey Energy GP LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2022 |
| 1642 | Dewey Enterprises Inc | | Oil & Gas Operator | Aug 2025 |
| 1643 | Dexxon Inc | Kiefer, OK 74041 | Oil & Gas Operator | Aug 2025 |
| 1644 | DFP Oil Company | Tulsa, OK 74114-1345 | Oil & Gas Operator | Dec 2004 |
| 1645 | Di Energy Inc. | Houston, TX 77067 | Oil & Gas Operator | Jan 2004 |
| 1646 | Diamond A Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2001 |
| 1647 | Diamond B Company Inc | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2010 |
| 1648 | Diamond Cross Oil Co LLC | Ponca City, OK 74601-1104 | Oil & Gas Operator | Aug 2025 |
| 1649 | Diamond E Oil Company LLC | | Oil Operator | Apr 2025 |
| 1650 | Diamond Energy Operating Company | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2005 |
| 1651 | Diamond Energy Partners LLC | Collinsville, OK 74021 | Oil & Gas Operator | Aug 2025 |
| 1652 | Diamond Energy Services LLC | Tulsa, OK 74103-3862 | Oil & Gas Operator | Jan 2016 |
| 1653 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Dec 2025 |
| 1654 | Diamond Harry H Inc | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2025 |
| 1655 | Diamond M Operating LLC | Kinta, OK 74552 | Gas Operator | Aug 2025 |
| 1656 | Diamond Production Company LLC | Irving, TX 75016-7853 | Oil & Gas Operator | Aug 2025 |
| 1657 | Diamondback-Disposal LLC | Oklahoma City, OK 73134-1016 | Oil Operator | Dec 2008 |
| 1658 | Diane Oil Company | Oklahoma City, OK 73146 | Oil & Gas Operator | Sep 2025 |
| 1659 | Diasu Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 1660 | Dickerson Dennis | Velma, OK 73491 | Oil Operator | Aug 2025 |
| 1661 | Dickerson Oil | Ada, OK 74820 | Oil Operator | Jan 2025 |
| 1662 | Diehl Mark | | Oil Operator | Nov 1998 |
| 1663 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Sep 2025 |
| 1664 | Dildine Oil Well Service | | Oil Operator | Apr 2011 |
| 1665 | Dilley Corp | Yale, OK 74085 | Oil & Gas Operator | May 2013 |
| 1666 | Dillingham Ranch LC | Tulsa, OK 74152 | Oil & Gas Operator | May 2013 |
| 1667 | Dimock Petroleum | Dallas, TX 75205 | Oil Operator | Apr 2014 |
| 1668 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 1669 | Dinsmore C E | Enid, OK 73702 | Oil & Gas Operator | May 2009 |
| 1670 | Discover Resources | Norman, OK 73070 | Oil & Gas Operator | Jan 2011 |
| 1671 | Discover Resources LLC | Norman, OK 73072-2310 | Oil & Gas Operator | Sep 2025 |
| 1672 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 1673 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 1674 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 1675 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Dec 2025 |
| 1676 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 1677 | Dixie Oil Company Inc | Moore, OK 73153 | Oil & Gas Operator | Nov 1994 |
| 1678 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 1679 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 1680 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Aug 2025 |
| 1681 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Dec 2024 |
| 1682 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 1683 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 1684 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 1685 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Dec 2025 |
| 1686 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Aug 2025 |
| 1687 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Jul 2025 |
| 1688 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 1689 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 1690 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 1691 | Dobson Oil And Gas LLC | Deer Creek, OK 74636 | Oil Operator | Aug 2022 |
| 1692 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 1693 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 1694 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Jun 2025 |
| 1695 | Domac Oil Company Inc | Perkins, OK 74059-0642 | Oil & Gas Operator | Feb 2006 |
| 1696 | Domar Oil & Gas Inc | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |
| 1697 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 1698 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Oct 2024 |
| 1699 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 1700 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |