| 7701 | Denmark Oil | Wichita, KS 67212 | Oil & Gas Operator | May 2000 |
| 7702 | Dennett'S Inc | Enid, OK 73701-1851 | Oil & Gas Operator | Apr 2014 |
| 7703 | Denney Don | Citrus Heights, CA 95611-2473 | Oil Operator | Aug 2023 |
| 7704 | Dennis & Broun | Bullard, TX 75757 | Oil & Gas Operator | Sep 2003 |
| 7705 | Dennis & Davis Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Sep 2026 |
| 7706 | Dennis Don Oil Company | Grady, OK 73569-9998 | Oil Operator | Jan 2002 |
| 7707 | Dennis Langlitz | Carlsbad, NM 88220 | Oil Operator | Jul 2009 |
| 7708 | Dennis Lloyd D | Fleming, OH 45729 | Oil & Gas Operator | Dec 2025 |
| 7709 | Dennis Oil & Gas LLC | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2025 |
| 7710 | Dennis, Don | Grady, OK 73545 | Oil & Gas Operator | Mar 1998 |
| 7711 | Dennison George | Tulsa, OK 74112-6732 | Oil & Gas Operator | Apr 2020 |
| 7712 | Denny'S Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2000 |
| 7713 | Denny, Arthur Gene | Independence, KS 67301 | Oil Operator | Oct 1996 |
| 7714 | Denoco Inc. | Plano, TX 75086 | Oil & Gas Operator | Mar 2008 |
| 7715 | Denova | | Oil Operator | Jan 1989 |
| 7716 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 7717 | Denpac Corporation | Colorado SPGS, CO 80922 | Oil & Gas Operator | Sep 2026 |
| 7718 | Densmore, Winfield F. Densmore, Debra L. | Lakewood, NY 14750 | Gas Operator | Dec 2025 |
| 7719 | Denteco Oil Company LLC | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 7720 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Sep 2026 |
| 7721 | Denton Oil & Gas | Argyle, TX 76226 | Oil Operator | Dec 2014 |
| 7722 | Denver Energy Exploration,LLC | Canyon Lake, TX 78133 | Oil Operator | Sep 2026 |
| 7723 | Denveramerican Petro LLC | | Oil & Gas Operator | May 2006 |
| 7724 | Denveramerican Petroleum, A LTD Liability Co | Denver, CO 80203 | Oil & Gas Operator | Sep 1997 |
| 7725 | Department Of Conservation | | Oil Operator | Dec 2005 |
| 7726 | Department Of Energy | Casper, WY 82601 | Oil & Gas Operator | Jan 2015 |
| 7727 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 7728 | Depco, Inc. & Texas Pacific Oil Co. | | Oil Operator | Jul 1995 |
| 7729 | Depew Union Free School District | Depew, NY 14043 | Gas Operator | Dec 2025 |
| 7730 | Depriest, Howard Joseph & Susan M. | East Aurora, NY 14052 | Gas Operator | Dec 2025 |
| 7731 | Depuy Drilling Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 7732 | Derae Oil Company | Seminole, OK 74868-2617 | Oil & Gas Operator | Feb 1997 |
| 7733 | Deran Resources, Inc. | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 7734 | Derby Exploration LLC | Okc, OK 73102 | Oil & Gas Operator | Jul 2026 |
| 7735 | Derby Oil & Gas Corp | Cumberland, OH 43732 | Oil & Gas Operator | Dec 1986 |
| 7736 | Derby Oil Of Texas | Ventura, CA 93003 | Oil & Gas Operator | May 1996 |
| 7737 | Derby Operating Corp | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 7738 | Dernick Resources Inc | Dallas, TX 75204 | Oil & Gas Operator | Jan 2002 |
| 7739 | Derrick Exploration, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2003 |
| 7740 | Derrick Oil & Gas, Inc. | Rosharon, TX 77583 | Oil & Gas Operator | Aug 2003 |
| 7741 | Derrick Petroleu | | Oil Operator | Sep 1994 |
| 7742 | Derrick Petroleum Inc | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2025 |
| 7743 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jun 2026 |
| 7744 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 7745 | Derwen Operating Company | Houston, TX 77098 | Gas Operator | Dec 2009 |
| 7746 | Des Oil Inc/Osage Only | | Oil Operator | Nov 1998 |
| 7747 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 7748 | Desco Corp | Columbus, OH 43085 | Oil & Gas Operator | Dec 1989 |
| 7749 | Desco Oil Company | Houston, TX 77056 | Oil & Gas Operator | Feb 2017 |
| 7750 | Desco-Medders | | Oil & Gas Operator | Jun 1984 |
| 7751 | Desert Eagle Operating LLC | | Gas Operator | May 2026 |
| 7752 | Desert Mountain Energy Corp. | Carson, NV 89701 | Gas Operator | Jun 2026 |
| 7753 | Desert Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 7754 | Desert States Energy, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Aug 1995 |
| 7755 | Deshal Energy LLC | Oklahoma City, OK 73170 | Oil Operator | Nov 2025 |
| 7756 | Deshazo Production Company | Dewey, OK 74029-2811 | Oil & Gas Operator | Nov 2005 |
| 7757 | Deshields Gary | Atwood, OK 74827 | Oil Operator | Jun 2026 |
| 7758 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 7759 | Desoto Gas Corporation | | Oil & Gas Operator | Oct 1986 |
| 7760 | Desoto Gas Prod Co Inc-Zadeck | | Gas Operator | Jan 1990 |
| 7761 | Desoto Gas Producing Co. Inc | | Oil & Gas Operator | Jan 1990 |
| 7762 | Desoto Oil & Gas Corporation | | Oil & Gas Operator | Dec 1990 |
| 7763 | Desperation Oil & Gas Co. | | Gas Operator | Jan 1989 |
| 7764 | Despot Expl. Inc-Serio Expl Co | | Oil & Gas Operator | Apr 1990 |
| 7765 | Despot Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 7766 | Despot Production Company | | Oil & Gas Operator | May 1983 |
| 7767 | Despot, Inc. | | Oil & Gas Operator | Mar 1983 |
| 7768 | Destin Corporation | Enid, OK 73702-2403 | Oil & Gas Operator | Mar 2005 |
| 7769 | Destin Operating Company, Inc. | | Oil & Gas Operator | Jan 2023 |
| 7770 | Destin Resources LLC | | Gas Operator | Jul 2018 |
| 7771 | Destiny Petroleum LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2024 |
| 7772 | Destiny Services LLC | Pratt, KS 67124 | Oil & Gas Operator | Jan 2024 |
| 7773 | Dette Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2015 |
| 7774 | Deuble, Adam And Misty Pennington | Jamestown, NY 14701 | Gas Operator | Dec 2025 |
| 7775 | Deuel Arch W | | Oil & Gas Operator | Aug 1995 |
| 7776 | Deuel Pet. Co. Inc. | | Oil & Gas Operator | Dec 2005 |
| 7777 | Deuel Petroleum Calif. Inc. | | Oil & Gas Operator | Dec 2001 |
| 7778 | Deuel Petroleum Company Inc. | | Oil & Gas Operator | Dec 1999 |
| 7779 | Deutsch Oil Comp | | Oil & Gas Operator | Oct 1994 |
| 7780 | Deutsch Oil Company | | Oil & Gas Operator | May 2026 |
| 7781 | Deutscher Oil Operations | | Oil Operator | Apr 2026 |
| 7782 | Developed Resources Inc | | Oil & Gas Operator | Dec 2025 |
| 7783 | Developing Equities Group LLC | | Oil & Gas Operator | Feb 2008 |
| 7784 | Development Ener | | Oil Operator | Dec 1994 |
| 7785 | Dever Lavon B | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2012 |
| 7786 | Dever Linda K | Norwalk, OH 43767 | Oil & Gas Operator | Dec 2024 |
| 7787 | Devilbiss Contracting, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Oct 2005 |
| 7788 | Devine, C. R., Inc. | Houston, TX 77292 | Oil & Gas Operator | Feb 2018 |
| 7789 | Devon Corporation | | Oil Operator | Oct 1981 |
| 7790 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 7791 | Devon Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 7792 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 7793 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 7794 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 7795 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 7796 | Devon Energy Williston, L.L.C. | Oklahoma City, OK 73102-8260 | Oil & Gas Operator | Jun 2026 |
| 7797 | Devon Gas Services, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2015 |
| 7798 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 7799 | Devon Resources Corporation | Jenks, OK 74037-3525 | Oil & Gas Operator | Jun 2026 |
| 7800 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |