| 7701 | Deltex Minerals Inc. | Peachtree Cty, GA 30269 | Oil & Gas Operator | Aug 2026 |
| 7702 | Deltex Petroleum | | Oil Operator | Nov 1994 |
| 7703 | Delwintex Oil & Gas Prop., Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2003 |
| 7704 | Dem Operations Inc | Lamont, OK 74643-5010 | Oil & Gas Operator | May 2026 |
| 7705 | Demambro, Gene Brian | Mayville, NY 14757 | Gas Operator | Dec 2025 |
| 7706 | Demand Energy, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jul 1999 |
| 7707 | Demco Oil & Gas Company | Blackwell, OK 74631-4203 | Oil & Gas Operator | Apr 2026 |
| 7708 | Demers - Fleming | Wichita Falls, TX 76305 | Oil & Gas Operator | Mar 2008 |
| 7709 | Demers Oil Production | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 7710 | Demier Oil Company | Tulsa, OK 74105-2128 | Oil & Gas Operator | Nov 2008 |
| 7711 | Deminex U S Oil Company | | Oil & Gas Operator | Jan 1998 |
| 7712 | Demiran Production, Inc. | | Oil Operator | Mar 2008 |
| 7713 | Demo Oil Co | | Oil Operator | Jan 2020 |
| 7714 | Demoss, L. V. | Graham, TX 76450 | Oil & Gas Operator | May 2004 |
| 7715 | Dempsey & Rowe | | Oil Operator | Aug 1986 |
| 7716 | Dempsey, Wayne L | | Oil & Gas Operator | Mar 2011 |
| 7717 | Den Cal, Inc. | Borger, TX 79007 | Oil & Gas Operator | Aug 2026 |
| 7718 | Den-Kay Corp. | Plano, TX 75074 | Oil Operator | Aug 2009 |
| 7719 | Denali Exploration, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Nov 2018 |
| 7720 | Denali Oil & Gas Management LLC | Houston, TX 77060 | Oil & Gas Operator | Dec 2012 |
| 7721 | Denali Petroleum, LLC | Arlington, TX 76006 | Oil Operator | Mar 2021 |
| 7722 | Denbury Management, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Dec 1999 |
| 7723 | Denbury Offshore, Inc. | | Oil & Gas Operator | Nov 2004 |
| 7724 | Denbury Onshore, LLC | Spring, TX 77389 | Oil & Gas Operator | Aug 2026 |
| 7725 | Denbury Resources Inc. | Plano, TX 75024 | Oil & Gas Operator | Dec 2003 |
| 7726 | Denchfield, Fred | Neal, KS 66863 | Oil Operator | Dec 1997 |
| 7727 | Denex Petroleum Corp. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 7728 | Denex, Inc. | | Oil & Gas Operator | Jul 1983 |
| 7729 | Denham Danny D | Kellyville, OK 74039 | Oil & Gas Operator | Mar 2026 |
| 7730 | Denham Operating Company | Tulsa, OK 74101-3627 | Oil & Gas Operator | Aug 2022 |
| 7731 | Denhart & Denhart | Brownwood, TX 76804 | Oil & Gas Operator | Dec 2001 |
| 7732 | Deni Frank R | | Oil Operator | Dec 2022 |
| 7733 | Denis Roberts Oil | | Oil Operator | Mar 2026 |
| 7734 | Denman J M Oil C | | Oil Operator | Mar 1994 |
| 7735 | Denman-Friesen Co. | Lufkin, TX 75901 | Oil & Gas Operator | Nov 2006 |
| 7736 | Denmark Oil | Wichita, KS 67212 | Oil & Gas Operator | May 2000 |
| 7737 | Dennett'S Inc | Enid, OK 73701-1851 | Oil & Gas Operator | Apr 2014 |
| 7738 | Denney Don | Citrus Heights, CA 95611-2473 | Oil Operator | Aug 2023 |
| 7739 | Dennis & Broun | Bullard, TX 75757 | Oil & Gas Operator | Sep 2003 |
| 7740 | Dennis & Davis Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Aug 2026 |
| 7741 | Dennis Don Oil Company | Grady, OK 73569-9998 | Oil Operator | Jan 2002 |
| 7742 | Dennis Fitzpatrick Rev. Trust | Sterling, KS 67579 | Gas Operator | Apr 2026 |
| 7743 | Dennis Langlitz | Carlsbad, NM 88220 | Oil Operator | Jul 2009 |
| 7744 | Dennis Lloyd D | Fleming, OH 45729 | Oil & Gas Operator | Dec 2025 |
| 7745 | Dennis Oil & Gas LLC | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2025 |
| 7746 | Dennis, Don | Grady, OK 73545 | Oil & Gas Operator | Mar 1998 |
| 7747 | Dennison George | Tulsa, OK 74112-6732 | Oil & Gas Operator | Apr 2020 |
| 7748 | Denny'S Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2000 |
| 7749 | Denny, Arthur Gene | Independence, KS 67301 | Oil Operator | Oct 1996 |
| 7750 | Denoco Inc. | Plano, TX 75086 | Oil & Gas Operator | Mar 2008 |
| 7751 | Denova | | Oil Operator | Jan 1989 |
| 7752 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 7753 | Denpac Corporation | Colorado SPGS, CO 80922 | Oil & Gas Operator | Aug 2026 |
| 7754 | Densmore, Winfield F. Densmore, Debra L. | Lakewood, NY 14750 | Gas Operator | Dec 2025 |
| 7755 | Denteco Oil Company LLC | Abilene, TX 79604 | Oil & Gas Operator | Aug 2026 |
| 7756 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2026 |
| 7757 | Denton Oil & Gas | Argyle, TX 76226 | Oil Operator | Dec 2014 |
| 7758 | Denver Energy Exploration,LLC | Canyon Lake, TX 78133 | Oil Operator | Aug 2026 |
| 7759 | Denveramerican Petro LLC | | Oil & Gas Operator | May 2006 |
| 7760 | Denveramerican Petroleum, A LTD Liability Co | Denver, CO 80203 | Oil & Gas Operator | Sep 1997 |
| 7761 | Department Of Conservation | | Oil Operator | Dec 2005 |
| 7762 | Department Of Energy | Casper, WY 82601 | Oil & Gas Operator | Jan 2015 |
| 7763 | Depco Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2014 |
| 7764 | Depco, Inc. & Texas Pacific Oil Co. | | Oil Operator | Jul 1995 |
| 7765 | Depew Union Free School District | Depew, NY 14043 | Gas Operator | Dec 2025 |
| 7766 | Depriest, Howard Joseph & Susan M. | East Aurora, NY 14052 | Gas Operator | Dec 2025 |
| 7767 | Depuy Drilling Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |
| 7768 | Derae Oil Company | Seminole, OK 74868-2617 | Oil & Gas Operator | Feb 1997 |
| 7769 | Deran Resources, Inc. | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 7770 | Derby Exploration LLC | Okc, OK 73102 | Oil & Gas Operator | May 2026 |
| 7771 | Derby Oil & Gas Corp | Cumberland, OH 43732 | Oil & Gas Operator | Dec 1986 |
| 7772 | Derby Oil Of Texas | Ventura, CA 93003 | Oil & Gas Operator | May 1996 |
| 7773 | Derby Operating Corp | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 7774 | Dernick Resources Inc | Dallas, TX 75204 | Oil & Gas Operator | Jan 2002 |
| 7775 | Derrick Exploration, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jan 2003 |
| 7776 | Derrick Oil & Gas, Inc. | Rosharon, TX 77583 | Oil & Gas Operator | Aug 2003 |
| 7777 | Derrick Petroleu | | Oil Operator | Sep 1994 |
| 7778 | Derrick Petroleum Inc | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2025 |
| 7779 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Apr 2026 |
| 7780 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 7781 | Derwen Operating Company | Houston, TX 77098 | Gas Operator | Dec 2009 |
| 7782 | Des Oil Inc/Osage Only | | Oil Operator | Nov 1998 |
| 7783 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2026 |
| 7784 | Desco Corp | Columbus, OH 43085 | Oil & Gas Operator | Dec 1989 |
| 7785 | Desco Oil Company | Houston, TX 77056 | Oil & Gas Operator | Feb 2017 |
| 7786 | Desco-Medders | | Oil & Gas Operator | Jun 1984 |
| 7787 | Desert Eagle Operating LLC | | Gas Operator | May 2026 |
| 7788 | Desert Mountain Energy Corp. | Carson, NV 89701 | Gas Operator | May 2026 |
| 7789 | Desert Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2026 |
| 7790 | Desert States Energy, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Aug 1995 |
| 7791 | Deshal Energy LLC | Oklahoma City, OK 73170 | Oil Operator | Nov 2025 |
| 7792 | Deshazo Production Company | Dewey, OK 74029-2811 | Oil & Gas Operator | Nov 2005 |
| 7793 | Deshields Gary | Atwood, OK 74827 | Oil Operator | Feb 2026 |
| 7794 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 7795 | Desoto Gas Corporation | | Oil & Gas Operator | Oct 1986 |
| 7796 | Desoto Gas Prod Co Inc-Zadeck | | Gas Operator | Jan 1990 |
| 7797 | Desoto Gas Producing Co. Inc | | Oil & Gas Operator | Jan 1990 |
| 7798 | Desoto Oil & Gas Corporation | | Oil & Gas Operator | Dec 1990 |
| 7799 | Desperation Oil & Gas Co. | | Gas Operator | Jan 1989 |
| 7800 | Despot Expl. Inc-Serio Expl Co | | Oil & Gas Operator | Apr 1990 |