| 7801 | Diamond B Industries Inc | Belle Fourche, SD 57717 | Oil & Gas Operator | Apr 2010 |
| 7802 | Diamond B Miami Flood, LTD. | Paola, KS 66071 | Oil Operator | Feb 2026 |
| 7803 | Diamond Chemical | | Oil & Gas Operator | Jan 1995 |
| 7804 | Diamond Cross Oil Co LLC | Ponca City, OK 74601-1104 | Oil & Gas Operator | Mar 2026 |
| 7805 | Diamond D Operating | | Oil & Gas Operator | Apr 1995 |
| 7806 | Diamond Dixie Ex | | Oil Operator | Jul 1985 |
| 7807 | Diamond Drilling Co. | | Oil Operator | Apr 1983 |
| 7808 | Diamond E Oil Company LLC | | Oil Operator | Apr 2025 |
| 7809 | Diamond Endeavors Inc | | Oil Operator | Dec 2020 |
| 7810 | Diamond Energy Operating Company | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2005 |
| 7811 | Diamond Energy Partners LLC | Collinsville, OK 74021 | Oil & Gas Operator | Apr 2026 |
| 7812 | Diamond Energy Services LLC | Tulsa, OK 74103-3862 | Oil & Gas Operator | Jan 2016 |
| 7813 | Diamond Energy Services, LP | Tulsa, OK 74103 | Oil Operator | Jun 2026 |
| 7814 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Jun 2026 |
| 7815 | Diamond G Production | FT Stockton, TX 79735 | Oil & Gas Operator | Jun 2026 |
| 7816 | Diamond Halo Group LLC | Grandview, TX 76050 | Oil Operator | Mar 2026 |
| 7817 | Diamond Harry H Inc | Shawnee, OK 74801 | Oil & Gas Operator | Apr 2026 |
| 7818 | Diamond M DRLG & Expl Co. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2026 |
| 7819 | Diamond M Oil Co., Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 7820 | Diamond M Operating LLC | Kinta, OK 74552 | Gas Operator | Mar 2026 |
| 7821 | Diamond Mineral Investments Inc. | Bangs, TX 76823 | Gas Operator | Feb 2008 |
| 7822 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Apr 2026 |
| 7823 | Diamond Oil And Gas, Inc. | Kalamazoo, MI 49001 | Oil & Gas Operator | Jun 2026 |
| 7824 | Diamond Oil Co | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1992 |
| 7825 | Diamond Onshore Production, L. L. C. | | Oil & Gas Operator | Sep 2005 |
| 7826 | Diamond Operating Inc | | Oil & Gas Operator | Aug 2021 |
| 7827 | Diamond Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2010 |
| 7828 | Diamond Petroleum LLC | | Oil & Gas Operator | Dec 2005 |
| 7829 | Diamond Production Company LLC | Irving, TX 75016-7853 | Oil & Gas Operator | Feb 2026 |
| 7830 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Jun 2026 |
| 7831 | Diamond S Masada LLC | Magnolia, TX 77354 | Oil & Gas Operator | Jun 2026 |
| 7832 | Diamond S Operating Co. | | Oil & Gas Operator | Oct 1992 |
| 7833 | Diamond Shamrock Chem Co | Irving, TX 75061 | Oil & Gas Operator | Dec 1990 |
| 7834 | Diamond Shamrock Corp | Amarillo, TX 79105 | Oil & Gas Operator | Jan 1987 |
| 7835 | Diamond Shamrock Expl | Dallas, TX 75201 | Oil & Gas Operator | May 1987 |
| 7836 | Diamond Shamrock Expl. Co. | | Oil & Gas Operator | Jun 1987 |
| 7837 | Diamond Star Oil, Inc. | Lacygne, KS 66040 | Oil Operator | Dec 2019 |
| 7838 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 7839 | Diamondback Oil Partners LLP | Arvada, CO 80004 | Oil & Gas Operator | Sep 2016 |
| 7840 | Diamondback Operating, LP | Tulsa, OK 74132 | Gas Operator | Jun 2026 |
| 7841 | Diamondback Resources LLC | Midland, TX 79705 | Oil & Gas Operator | May 2018 |
| 7842 | Diamondback-Disposal LLC | Oklahoma City, OK 73134-1016 | Oil Operator | Dec 2008 |
| 7843 | Diamondhead Oil Co., LLC | | Oil & Gas Operator | May 2026 |
| 7844 | Diana Pease & Steve Pease Revocable Trust | Wellsville, NY 14895 | Gas Operator | Dec 2024 |
| 7845 | Diane Oil Company | Oklahoma City, OK 73146 | Oil & Gas Operator | Apr 2026 |
| 7846 | Diasu Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 7847 | Dibiaggio, Deirdre And Katherine Carmichael | Atlantis, FL 33463 | Gas Operator | Dec 2024 |
| 7848 | Dick Lindsay Oil Company, Inc. | Graham, TX 76450 | Oil Operator | Jun 2026 |
| 7849 | Dickerson Dennis | Velma, OK 73491 | Oil Operator | Apr 2026 |
| 7850 | Dickerson Oil | Ada, OK 74820 | Oil Operator | Mar 2026 |
| 7851 | Dickman Farms, LLC | Auburn, NY 13021 | Gas Operator | Dec 2024 |
| 7852 | Dickson Petroleum | Midland, TX 79710 | Oil & Gas Operator | Nov 1998 |
| 7853 | Dickson Petroleum, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2000 |
| 7854 | Didomenico, Thomas J | Jamestown, NY 14701 | Gas Operator | Dec 2024 |
| 7855 | Diehl Glenn D Oi | | Oil Operator | Jul 1993 |
| 7856 | Diehl Mark | | Oil Operator | Nov 1998 |
| 7857 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Feb 2026 |
| 7858 | Dieter Prod Comp | | Oil & Gas Operator | Feb 1991 |
| 7859 | Dieter Production Company | Durham, KS 67438 | Gas Operator | Mar 2013 |
| 7860 | Dietrich Foundation | Pittsburgh, PA 15219 | Gas Operator | Dec 2025 |
| 7861 | Dietrich Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jul 2000 |
| 7862 | Dietrich Philip H | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2024 |
| 7863 | Dietrich Resources Corporation | | Oil & Gas Operator | Jun 2007 |
| 7864 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Mar 2026 |
| 7865 | Digital Operating Company LLC | Boerne, TX 78006 | Oil & Gas Operator | Jun 2026 |
| 7866 | Dildine Oil Well Service | | Oil Operator | Apr 2011 |
| 7867 | Diler Development Inc. | Garland, TX 75043 | Oil & Gas Operator | Jun 2026 |
| 7868 | Dillard & Dillard Inc. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2026 |
| 7869 | Dillard, A. W., Jr. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 7870 | Diller Oil Company | Baird, TX 79504 | Oil Operator | Jun 2026 |
| 7871 | Dilley Corp | Yale, OK 74085 | Oil & Gas Operator | May 2013 |
| 7872 | Dilley, W.R. & A'Meta I. | Sedan, KS 67361 | Oil Operator | Nov 2015 |
| 7873 | Dilligas, Inc. | | Oil Operator | May 1990 |
| 7874 | Dillingham Ranch LC | Tulsa, OK 74152 | Oil & Gas Operator | May 2013 |
| 7875 | Dillon, H. L., Jr. | Houston, TX 77027 | Oil & Gas Operator | Mar 1996 |
| 7876 | Dils Oil & Gas | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2025 |
| 7877 | Dils, Sherman III Dba Dils Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 7878 | Dime Box Oil Company | Austin, TX 78759 | Oil & Gas Operator | Mar 2008 |
| 7879 | Dimension Energy Co., L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 7880 | Dimes Energy GP Inc. | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 7881 | Dimick Production, LLC | Hamilton, KS 66853 | Oil Operator | Jan 2026 |
| 7882 | Dimmit County SWD, LLC | Carrizo SPGS, TX 78834 | Oil Operator | Jun 2026 |
| 7883 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Jun 2026 |
| 7884 | Dimock Petroleum | Dallas, TX 75205 | Oil Operator | Apr 2014 |
| 7885 | Dinero Oil Corporation | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Nov 1999 |
| 7886 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 7887 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | Jun 2026 |
| 7888 | Dinsmore C E | Enid, OK 73702 | Oil & Gas Operator | May 2009 |
| 7889 | Directional Drilling Systems, LLC | Greenwood VIllage, CO 80111 | Oil Operator | Dec 2019 |
| 7890 | Dirks Petroleum Company | Beeville, TX 78104 | Oil & Gas Operator | Jun 2026 |
| 7891 | Dirks, R. W. | Tuleta, TX 78162 | Oil & Gas Operator | May 1999 |
| 7892 | Dirks, R.W. Pet. Eng. Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Jul 1999 |
| 7893 | Dirnett, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Jun 2026 |
| 7894 | Discorbis Oil Company | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2019 |
| 7895 | Discover Resources | Norman, OK 73070 | Oil & Gas Operator | Jan 2011 |
| 7896 | Discover Resources LLC | Norman, OK 73072-2310 | Oil & Gas Operator | Mar 2026 |
| 7897 | Discovery Energy Corp. CC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jun 2026 |
| 7898 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2026 |
| 7899 | Discovery Energy, LLC | | Oil Operator | Jan 2007 |
| 7900 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |