| 7801 | Dead Fern Resources Inc | Sperry, OK 74073 | Oil & Gas Operator | Nov 2025 |
| 7802 | Dead Horse Oil & Gas LLC | Skiatook, OK 74070-9343 | Oil & Gas Operator | Jun 2015 |
| 7803 | Deagen, Bill & Sons, LTD. | Stockdale, TX 78160 | Oil Operator | May 2018 |
| 7804 | Dean Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2019 |
| 7805 | Dean Enterprises, Inc. | | Oil & Gas Operator | Jun 2019 |
| 7806 | Dean Petroleum | | Oil & Gas Operator | Jun 2000 |
| 7807 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Oct 2025 |
| 7808 | Deanlake Operator, L.L.C. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 7809 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 7810 | Dearinger Compan | | Oil Operator | Dec 1994 |
| 7811 | Deb Oil & Gas | | Gas Operator | Dec 2021 |
| 7812 | Deb Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 2013 |
| 7813 | Debbie Carroll | | Oil & Gas Operator | Apr 1999 |
| 7814 | Debeaux - Flores | | Oil & Gas Operator | Jan 2025 |
| 7815 | Deblin Oil & Gas, Inc | | Oil & Gas Operator | Aug 1995 |
| 7816 | Deblin Operating LTD | | Oil & Gas Operator | Jan 1997 |
| 7817 | Debord Oil Producers | Lincoln, NE 68503 | Oil Operator | Dec 1998 |
| 7818 | Debord Oil Producers Inc | | Oil Operator | Dec 2006 |
| 7819 | Deca Energy Corporation | | Oil & Gas Operator | Aug 1986 |
| 7820 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 7821 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
| 7822 | Dechant Oil Operations, LLC | Hutchinson, KS 67501 | Oil Operator | Aug 2025 |
| 7823 | Deck Exploration Inc | Perry, OK 73077-0303 | Oil & Gas Operator | May 2013 |
| 7824 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 7825 | Decker & Associates | | Oil & Gas Operator | Mar 1991 |
| 7826 | Decker Lease Ope | | Oil Operator | Dec 1988 |
| 7827 | Decker Operating Co., L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Feb 2026 |
| 7828 | Decker Petroleum | | Oil & Gas Operator | Oct 2002 |
| 7829 | Decker Well Service LLC | Fleming, OH 45729 | Oil & Gas Operator | Dec 2017 |
| 7830 | Decker, James K. & Tiffany J. | Jamestown, NY 14701 | Oil & Gas Operator | Dec 2024 |
| 7831 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 7832 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 7833 | Deco | Kilgore, TX 75662 | Oil & Gas Operator | Jan 1999 |
| 7834 | Deco Oil Co. | | Oil Operator | Oct 2013 |
| 7835 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 7836 | Dee'S Oil | Wellington, TX 79095 | Oil & Gas Operator | Mar 2008 |
| 7837 | Dee-Jay Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 7838 | Deem, J. F. Oil & Gas, LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2021 |
| 7839 | Deem, W. A. | Harrisville, WV 26362-7878 | Oil & Gas Operator | Dec 2001 |
| 7840 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Feb 2026 |
| 7841 | Deep Creek Adventures, Co. | | Oil Operator | Dec 2018 |
| 7842 | Deep Ford Gas Company | Charleston, WV 25321-0169 | Gas Operator | Dec 2021 |
| 7843 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Feb 2026 |
| 7844 | Deep Hole Oil LLC | Ashland, KY 41105 | Oil & Gas Operator | Dec 2020 |
| 7845 | Deep Reef Industries | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2004 |
| 7846 | Deep Resources LLC | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2023 |
| 7847 | Deep River Energy LLC | | Oil Operator | Oct 2025 |
| 7848 | Deep Rock LLC | Tulsa, OK 74137-1612 | Gas Operator | Jun 2022 |
| 7849 | Deep Rock Resources, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 7850 | Deep South Production | | Oil Operator | Dec 2023 |
| 7851 | Deeprock Disposal Services, LLC | | Oil & Gas Operator | Sep 1991 |
| 7852 | Deepwell Co | | Oil Operator | Jul 1989 |
| 7853 | Deer Creek Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2019 |
| 7854 | Deer Creek Oil & Gas | Atlanta, GA 30326-1000 | Gas Operator | Dec 1987 |
| 7855 | Deer Oil & Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 7856 | Deer Run Oil & Gas LLC | Albion, PA 16401-8306 | Gas Operator | Dec 2024 |
| 7857 | Deer Run Oil Lease, LLC | Caney, KS 67333 | Oil Operator | Jul 2025 |
| 7858 | Dees Production LLC | | Oil Operator | Dec 2024 |
| 7859 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 7860 | Deg Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2007 |
| 7861 | Degaugh Well Service Inc | | Oil Operator | Jul 1989 |
| 7862 | Degge Oil Field Service | Okemah, OK 74859-0269 | Oil Operator | Nov 2014 |
| 7863 | Degge Oilfield Services LLC | Okemah, OK 74859 | Oil Operator | Sep 2025 |
| 7864 | Degroot, Garry | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 7865 | Deguello Operating LLC | College Sta, TX 77840 | Oil & Gas Operator | Feb 2026 |
| 7866 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Nov 2025 |
| 7867 | Deisenroth M Craig | Tulsa, OK 74104-6511 | Oil & Gas Operator | Nov 2025 |
| 7868 | Deitz Edith | Clarion, PA 16214-9416 | Oil & Gas Operator | Dec 2009 |
| 7869 | Deitz Gas & Oil Inc | Clarion, PA 16214-3215 | Oil & Gas Operator | Dec 2024 |
| 7870 | Dejong John B | | Oil Operator | Dec 2025 |
| 7871 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 7872 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 7873 | Dekasco, Inc. | | Oil & Gas Operator | May 1990 |
| 7874 | Del Amo Energy Co. | | Oil & Gas Operator | Dec 1987 |
| 7875 | Del Energy, Inc | | Oil Operator | Dec 2014 |
| 7876 | Del Mar | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 7877 | Del Mar Energy, Inc. | Van Alstyne, TX 75495 | Oil & Gas Operator | Feb 2026 |
| 7878 | Del Mar Exploration Company | Houston, TX 77006 | Oil & Gas Operator | Jan 2014 |
| 7879 | Del Oil & Gas Corp | | Oil Operator | Jul 1981 |
| 7880 | Del Petroleum Corporation | Dallas, TX 75219 | Oil & Gas Operator | Jan 2012 |
| 7881 | Del Rio Production Co. | Gainesville, TX 76240 | Oil Operator | Mar 2019 |
| 7882 | Del-Rio Resources Inc | Vernal, UT 84079 | Oil & Gas Operator | Jan 2018 |
| 7883 | Delaney Oil And Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 7884 | Delaware Davis Petroleum Corp. | Houston, TX 77056 | Oil & Gas Operator | Jan 2000 |
| 7885 | Delaware Dyche Corp. | Hutchinson, KS 67501 | Oil Operator | Jan 2010 |
| 7886 | Delaware Ecco Petroleum Inc. | Rockwall, TX 75087 | Oil & Gas Operator | Jul 2001 |
| 7887 | Delbert A. Dodson | | Oil Operator | Aug 2002 |
| 7888 | Delcar, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1995 |
| 7889 | Delco Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 7890 | Delek Energy Systems Us, Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 7891 | Delfin Operating, LLC | Dallas, TX 75243 | Oil & Gas Operator | Feb 2026 |
| 7892 | Delgado, Emil A | San Antonio, TX 78223 | Oil & Gas Operator | Sep 2016 |
| 7893 | Delhi Gas Pipeli | | Gas Operator | Aug 1998 |
| 7894 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 7895 | Delhi Pipeline | | Oil & Gas Operator | Sep 1999 |
| 7896 | Delhi-Taylor Oil Corp | | Oil & Gas Operator | Dec 1974 |
| 7897 | Delhi-Trading LLC | Durango, CO 81301 | Oil & Gas Operator | Dec 2025 |
| 7898 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 7899 | Dell-Ray Investments, Inc. | Nickerson, KS 67561 | Oil Operator | Dec 2019 |
| 7900 | Delmar Operating, Inc. | Houston, TX 77010 | Oil & Gas Operator | Oct 1996 |