| 7901 | Derrick Petroleu | | Oil Operator | Sep 1994 |
| 7902 | Derrick Petroleum Inc | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2024 |
| 7903 | Derrick Resources Inc. | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jun 2025 |
| 7904 | Derrick-Amer Oil | | Oil Operator | Dec 1991 |
| 7905 | Derwen Operating Company | Houston, TX 77098 | Gas Operator | Dec 2009 |
| 7906 | Des Oil Inc/Osage Only | | Oil Operator | Nov 1998 |
| 7907 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 7908 | Desco Corp | Columbus, OH 43085 | Oil & Gas Operator | Dec 1989 |
| 7909 | Desco Oil Company | Houston, TX 77056 | Oil & Gas Operator | Feb 2017 |
| 7910 | Desco-Medders | | Oil & Gas Operator | Jun 1984 |
| 7911 | Desert Eagle Operating LLC | | Gas Operator | Aug 2025 |
| 7912 | Desert Mountain Energy Corp. | Carson, NV 89701 | Gas Operator | Jul 2025 |
| 7913 | Desert Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 7914 | Desert States Energy, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Aug 1995 |
| 7915 | Deshal Energy LLC | Oklahoma City, OK 73170 | Oil Operator | Apr 2025 |
| 7916 | Deshazo Production Company | Dewey, OK 74029-2811 | Oil & Gas Operator | Nov 2005 |
| 7917 | Deshields Gary | Atwood, OK 74827 | Oil Operator | Sep 2024 |
| 7918 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 7919 | Desoto Gas Corporation | | Oil & Gas Operator | Oct 1986 |
| 7920 | Desoto Gas Prod Co Inc-Zadeck | | Gas Operator | Jan 1990 |
| 7921 | Desoto Gas Producing Co. Inc | | Oil & Gas Operator | Jan 1990 |
| 7922 | Desoto Oil & Gas Corporation | | Oil & Gas Operator | Dec 1990 |
| 7923 | Desperation Oil & Gas Co. | | Gas Operator | Jan 1989 |
| 7924 | Despot Expl. Inc-Serio Expl Co | | Oil & Gas Operator | Apr 1990 |
| 7925 | Despot Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 7926 | Despot Production Company | | Oil & Gas Operator | May 1983 |
| 7927 | Despot, Inc. | | Oil & Gas Operator | Mar 1983 |
| 7928 | Destin Corporation | Enid, OK 73702-2403 | Oil & Gas Operator | Mar 2005 |
| 7929 | Destin Operating Company, Inc. | | Oil & Gas Operator | Jan 2023 |
| 7930 | Destin Resources LLC | | Gas Operator | Jul 2018 |
| 7931 | Destiny Petroleum LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2024 |
| 7932 | Destiny Services LLC | Pratt, KS 67124 | Oil & Gas Operator | Jan 2024 |
| 7933 | Dette Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Oct 2015 |
| 7934 | Deuble, Adam And Misty Pennington | Jamestown, NY 14701 | Gas Operator | Dec 2024 |
| 7935 | Deuel Arch W | | Oil & Gas Operator | Aug 1995 |
| 7936 | Deuel Pet. Co. Inc. | | Oil & Gas Operator | Dec 2005 |
| 7937 | Deuel Petroleum Calif. Inc. | | Oil & Gas Operator | Dec 2001 |
| 7938 | Deuel Petroleum Company Inc. | | Oil & Gas Operator | Dec 1999 |
| 7939 | Deutsch Oil Comp | | Oil & Gas Operator | Oct 1994 |
| 7940 | Deutsch Oil Company | | Oil & Gas Operator | Jun 2025 |
| 7941 | Deutscher Oil Operations | | Oil Operator | Jun 2025 |
| 7942 | Developed Resources Inc | Cheswick, PA 15024-1351 | Oil & Gas Operator | Dec 2024 |
| 7943 | Development Ener | | Oil Operator | Dec 1994 |
| 7944 | Dever Lavon B | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2012 |
| 7945 | Dever Linda K | Norwalk, OH 43767 | Oil & Gas Operator | Dec 2024 |
| 7946 | Devilbiss Contracting, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Oct 2005 |
| 7947 | Devine, C. R., Inc. | Houston, TX 77292 | Oil & Gas Operator | Feb 2018 |
| 7948 | Devon Corporation | | Oil Operator | Oct 1981 |
| 7949 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 7950 | Devon Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 7951 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 7952 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 7953 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 7954 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 7955 | Devon Energy Williston, L.L.C. | Oklahoma City, OK 73102-8260 | Oil & Gas Operator | Jul 2025 |
| 7956 | Devon Gas Services, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2015 |
| 7957 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 7958 | Devon Resources Corporation | Jenks, OK 74037-3525 | Oil & Gas Operator | May 2025 |
| 7959 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 7960 | Devonian Energy Inc | | Gas Operator | Jun 2025 |
| 7961 | Devonian Energy Inc And Muzyl Oil Corp | | Oil & Gas Operator | Aug 1999 |
| 7962 | Devonian Gas Production, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 7963 | Devonian Oil Com | | Oil Operator | Dec 1996 |
| 7964 | Devonian Oil Company | Lawrence, KS 66044 | Oil Operator | May 2001 |
| 7965 | Devonian Resources Inc | Pikeville, KY 41502 | Oil & Gas Operator | Dec 2024 |
| 7966 | Devore Anthony D | Gambier, OH 43022 | Oil & Gas Operator | Dec 2010 |
| 7967 | Devx Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Feb 2004 |
| 7968 | Dew Oil And Gas Co.,Inc. | | Oil & Gas Operator | Dec 1989 |
| 7969 | Dewayne'S Tank Service, Inc. | Saint John, KS 67576 | Oil Operator | Nov 2000 |
| 7970 | Dewbre Petroleum Corporation | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Oct 2025 |
| 7971 | Dewbre, Jerry C., Trustee | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Oct 2025 |
| 7972 | Dewco Exploration | Coleman, TX 76834 | Oil & Gas Operator | Nov 2007 |
| 7973 | Dewco Oil | | Oil Operator | Jun 1996 |
| 7974 | Dewey E. Williams | | Oil Operator | Nov 1978 |
| 7975 | Dewey Energy GP LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2022 |
| 7976 | Dewey Enterprises Inc | | Oil & Gas Operator | Jun 2025 |
| 7977 | Dewey White Etal | | Oil & Gas Operator | Dec 1987 |
| 7978 | Dewey Williams | | Oil Operator | Mar 1992 |
| 7979 | Dews Production LLC | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 7980 | Dexco, Inc. | | Oil & Gas Operator | May 1990 |
| 7981 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2025 |
| 7982 | DFG Energy Company LLC | Eastland, TX 76448 | Oil & Gas Operator | Oct 2025 |
| 7983 | DFP Oil Company | Tulsa, OK 74114-1345 | Oil & Gas Operator | Dec 2004 |
| 7984 | DG&E/Slocum, Limited Partnership | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 7985 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Jun 2025 |
| 7986 | DGH Petroleum, Inc. | | Oil & Gas Operator | Aug 2011 |
| 7987 | DGP Energy, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Aug 2025 |
| 7988 | DH Operating, Inc. | Gordon, TX 76453 | Oil & Gas Operator | Oct 2025 |
| 7989 | DH Production | Albany, TX 76430 | Oil Operator | Dec 2005 |
| 7990 | DHC, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 1997 |
| 7991 | DHP Investments, LTD. | Tyler, TX 75703 | Oil Operator | Jun 2025 |
| 7992 | DHW Energy LLC | | Oil Operator | Dec 2024 |
| 7993 | Di Energy Inc. | Houston, TX 77067 | Oil & Gas Operator | Jan 2004 |
| 7994 | Diablo Oil Corp. | | Oil & Gas Operator | Apr 1989 |
| 7995 | Diamar Oil Company, Inc. | | Oil Operator | Nov 1983 |
| 7996 | Diamex Company | | Oil & Gas Operator | Oct 1982 |
| 7997 | Diamond "S" Oil, Inc. | Houston, TX 77065 | Oil & Gas Operator | Apr 1994 |
| 7998 | Diamond A Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2001 |
| 7999 | Diamond B Company Inc | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2010 |
| 8000 | Diamond B Indust | | Oil Operator | Nov 1996 |