| 7801 | DDC Oil LLC | Rockwall, TX 75087-5383 | Oil Operator | Mar 2020 |
| 7802 | DDC Production Company | Archer City, TX 76351 | Oil Operator | Apr 2025 |
| 7803 | DDC Track, LLC | Bushland, TX 79012 | Oil Operator | Apr 2025 |
| 7804 | DDD Exploration, Inc. | Amarillo, TX 79109 | Oil Operator | Apr 2025 |
| 7805 | De & TZ LLC | Wellsville, KS 66092 | Oil Operator | Dec 2024 |
| 7806 | De Compiegne Prop. Co. 20, The | Midland, TX 79702 | Oil Operator | Oct 2019 |
| 7807 | De IV Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 7808 | De Kalb Agric Assn Inc | Vernal, UT | Oil & Gas Operator | Jun 1965 |
| 7809 | De La Torre Oil & Gas, Inc | McAllen, TX 78501 | Oil & Gas Operator | Apr 2025 |
| 7810 | De Larios, R. V., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 7811 | De LTD Family Partnership | Punxsutawney, PA 15767-2646 | Oil & Gas Operator | Dec 2022 |
| 7812 | De Operating LLC | Austin, TX 78701 | Oil & Gas Operator | Apr 2017 |
| 7813 | De Soto Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2006 |
| 7814 | De Soto Oil Properties, LLC | | Oil & Gas Operator | Feb 2025 |
| 7815 | De V Operating, LLC | Fort Worth, TX 76107 | Oil Operator | Apr 2025 |
| 7816 | De-Vac Inc. | Daisetta, TX 77533 | Oil Operator | Apr 2025 |
| 7817 | De3 Operating LLC | Irving, TX 75038 | Oil & Gas Operator | Jun 2021 |
| 7818 | Deacon, Thomas J. | Randolph, NY 14772 | Gas Operator | Dec 2023 |
| 7819 | Dead Fern Resources Inc | Sperry, OK 74073 | Oil & Gas Operator | Feb 2025 |
| 7820 | Dead Horse Oil & Gas LLC | Skiatook, OK 74070-9343 | Oil & Gas Operator | Jun 2015 |
| 7821 | Deagen, Bill & Sons, LTD. | Stockdale, TX 78160 | Oil Operator | May 2018 |
| 7822 | Dean Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2019 |
| 7823 | Dean Enterprises, Inc. | | Oil & Gas Operator | Jun 2019 |
| 7824 | Dean Petroleum | | Oil & Gas Operator | Jun 2000 |
| 7825 | Dean'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2025 |
| 7826 | Deanlake Operator, L.L.C. | Houston, TX 77010 | Oil & Gas Operator | Sep 2011 |
| 7827 | Dearing, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2021 |
| 7828 | Dearinger Compan | | Oil Operator | Dec 1994 |
| 7829 | Deaton, Gary L. Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2015 |
| 7830 | Deb Oil & Gas | | Gas Operator | Dec 2021 |
| 7831 | Deb Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 2013 |
| 7832 | Debbie Carroll | | Oil & Gas Operator | Apr 1999 |
| 7833 | Debeaux - Flores | | Oil & Gas Operator | Jan 2025 |
| 7834 | Deblin Oil & Gas, Inc | | Oil & Gas Operator | Aug 1995 |
| 7835 | Deblin Operating LTD | | Oil & Gas Operator | Jan 1997 |
| 7836 | Debord Oil Producers | Lincoln, NE 68503 | Oil Operator | Dec 1998 |
| 7837 | Debord Oil Producers Inc | | Oil Operator | Dec 2006 |
| 7838 | Deca Energy Corporation | | Oil & Gas Operator | Aug 1986 |
| 7839 | Decab Company | Victoria, KS 67671 | Oil Operator | Aug 1996 |
| 7840 | Decalta International Corp | Denver, CO 80202 | Oil & Gas Operator | Mar 2015 |
| 7841 | Dechant Oil Operations, LLC | Hutchinson, KS 67501 | Oil Operator | Dec 2024 |
| 7842 | Deck Exploration Inc | Perry, OK 73077-0303 | Oil & Gas Operator | May 2013 |
| 7843 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 7844 | Decker & Associates | | Oil & Gas Operator | Mar 1991 |
| 7845 | Decker Lease Ope | | Oil Operator | Dec 1988 |
| 7846 | Decker Operating Co., L.L.C. | Houston, TX 77008 | Oil & Gas Operator | Apr 2025 |
| 7847 | Decker Petroleum | | Oil & Gas Operator | Oct 2002 |
| 7848 | Decker Well Service LLC | Fleming, OH 45729 | Oil & Gas Operator | Dec 2017 |
| 7849 | Decker, James K. & Tiffany J. | Jamestown, NY 14701 | Oil & Gas Operator | Dec 2023 |
| 7850 | Declar Oil & Gas Inc | | Oil & Gas Operator | Dec 2012 |
| 7851 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 7852 | Deco | Kilgore, TX 75662 | Oil & Gas Operator | Jan 1999 |
| 7853 | Deco Oil Co. | | Oil Operator | Oct 2013 |
| 7854 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |
| 7855 | Dee'S Oil | Wellington, TX 79095 | Oil & Gas Operator | Mar 2008 |
| 7856 | Dee-Jay Exploration Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 7857 | Deem, J. F. Oil & Gas, LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2021 |
| 7858 | Deem, W. A. | Harrisville, WV 26362-7878 | Oil & Gas Operator | Dec 2001 |
| 7859 | Deen Drilling Company | Archer City, TX 76351 | Oil & Gas Operator | Apr 2025 |
| 7860 | Deep Creek Adventures, Co. | | Oil Operator | Dec 2018 |
| 7861 | Deep Ford Gas Company | Charleston, WV 25321-0169 | Gas Operator | Dec 2021 |
| 7862 | Deep Gully Oil LLC | Houston, TX 77292 | Oil Operator | Apr 2025 |
| 7863 | Deep Hole Oil LLC | Ashland, KY 41105 | Oil & Gas Operator | Dec 2020 |
| 7864 | Deep Reef Industries | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2004 |
| 7865 | Deep Resources LLC | Holmesville, OH 44633 | Oil & Gas Operator | Dec 2023 |
| 7866 | Deep River Energy LLC | | Oil Operator | Dec 2024 |
| 7867 | Deep Rock LLC | Tulsa, OK 74137-1612 | Gas Operator | Jun 2022 |
| 7868 | Deep Rock Resources, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 7869 | Deep South Production | | Oil Operator | Dec 2023 |
| 7870 | Deeprock Disposal Services, LLC | | Oil & Gas Operator | Sep 1991 |
| 7871 | Deepwell Co | | Oil Operator | Jul 1989 |
| 7872 | Deer Creek Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2019 |
| 7873 | Deer Creek Oil & Gas | Atlanta, GA 30326-1000 | Gas Operator | Dec 1987 |
| 7874 | Deer Oil & Gas | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 7875 | Deer Run Oil & Gas LLC | Albion, PA 16401-8306 | Gas Operator | Dec 2024 |
| 7876 | Deer Run Oil Lease, LLC | Caney, KS 67333 | Oil Operator | Dec 2024 |
| 7877 | Dees Production LLC | | Oil Operator | Dec 2024 |
| 7878 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 7879 | Deg Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2007 |
| 7880 | Degaugh Well Service Inc | | Oil Operator | Jul 1989 |
| 7881 | Degge Oil Field Service | Okemah, OK 74859-0269 | Oil Operator | Nov 2014 |
| 7882 | Degge Oilfield Services LLC | Okemah, OK 74859 | Oil Operator | Jan 2025 |
| 7883 | Degroot, Garry | South Dayton, NY 14138 | Gas Operator | Dec 2023 |
| 7884 | Deguello Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 7885 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2025 |
| 7886 | Deisenroth Gas Products Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2022 |
| 7887 | Deisenroth M Craig | Tulsa, OK 74104-6511 | Oil & Gas Operator | Nov 2024 |
| 7888 | Deitz Edith | Clarion, PA 16214-9416 | Oil & Gas Operator | Dec 2009 |
| 7889 | Deitz Gas & Oil Inc | Clarion, PA 16214-3215 | Oil & Gas Operator | Dec 2024 |
| 7890 | Dejong John B | | Oil Operator | Dec 2024 |
| 7891 | Dejour Energy (USA) Corporation | | Oil & Gas Operator | Jun 2014 |
| 7892 | Deka Exploration Inc | Oklahoma City, OK 73113-0057 | Oil & Gas Operator | Nov 2019 |
| 7893 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 7894 | Dekasco, Inc. | | Oil & Gas Operator | May 1990 |
| 7895 | Del Amo Energy Co. | | Oil & Gas Operator | Dec 1987 |
| 7896 | Del Energy, Inc | | Oil Operator | Dec 2014 |
| 7897 | Del Mar | Holliday, TX 76366 | Oil & Gas Operator | Apr 2025 |
| 7898 | Del Mar Energy, Inc. | Van Alstyne, TX 75495 | Oil & Gas Operator | Apr 2025 |
| 7899 | Del Mar Exploration Company | Houston, TX 77006 | Oil & Gas Operator | Jan 2014 |
| 7900 | Del Oil & Gas Corp | | Oil Operator | Jul 1981 |