| 7901 | Discovery Oil And Gas | Canonburg, PA 15317 | Oil & Gas Operator | Dec 2025 |
| 7902 | Discovery Oil LTD | Los Angeles, CA 90067 | Oil & Gas Operator | Jan 1993 |
| 7903 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 7904 | Discovery Operating, LLC | | Oil & Gas Operator | Oct 2023 |
| 7905 | Discovery Petroleum, L.L.C. | Alice, TX 78333 | Oil & Gas Operator | Jun 2026 |
| 7906 | Discus Oil Corporation | | Oil & Gas Operator | Dec 2002 |
| 7907 | Ditta Exploration Co., Inc. | | Oil & Gas Operator | Feb 1990 |
| 7908 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 7909 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 7910 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Apr 2026 |
| 7911 | Diversified Natural Res., Inc. | | Oil Operator | May 2000 |
| 7912 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Mar 2026 |
| 7913 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 7914 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Jun 2026 |
| 7915 | Diversified Resources LLC | | Gas Operator | Dec 2025 |
| 7916 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 7917 | Diversified Southern Production LLC | | Oil & Gas Operator | Dec 2018 |
| 7918 | Diversity Petroleum, LP | Rockwall, TX 75087 | Oil & Gas Operator | Aug 2010 |
| 7919 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 7920 | Divine'S Service & Repairs Inc | | Oil & Gas Operator | Mar 1997 |
| 7921 | Dixie Drilling Company, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Nov 2011 |
| 7922 | Dixie Lake Operating, LLC | Longview, TX 75606 | Gas Operator | Jun 2026 |
| 7923 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 7924 | Dixie Oil Company Inc | Moore, OK 73153 | Oil & Gas Operator | Nov 1994 |
| 7925 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 7926 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Nov 2025 |
| 7927 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 7928 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 7929 | Dixie Well Service, Inc. | | Oil & Gas Operator | Jul 1995 |
| 7930 | Dixieland Energy LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Jun 2026 |
| 7931 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Mar 2026 |
| 7932 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 7933 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 7934 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Mar 2026 |
| 7935 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 7936 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 7937 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 7938 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 7939 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 7940 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Jan 2026 |
| 7941 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 7942 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Feb 2026 |
| 7943 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jun 2026 |
| 7944 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2026 |
| 7945 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 7946 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 7947 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | Jun 2026 |
| 7948 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 7949 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Jun 2026 |
| 7950 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Apr 2026 |
| 7951 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2025 |
| 7952 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2024 |
| 7953 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 7954 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Feb 2026 |
| 7955 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Apr 2026 |
| 7956 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 7957 | DKM Offshore Energy Inc. | | Oil & Gas Operator | Dec 1993 |
| 7958 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 7959 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 7960 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 7961 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Jun 2026 |
| 7962 | DL Energy, LLC | Saco, MT 59261 | Gas Operator | Mar 2026 |
| 7963 | DL Resources Inc | | Oil & Gas Operator | Dec 2025 |
| 7964 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 7965 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2026 |
| 7966 | DLJ Investments, LLC | Springboro, OH 45006 | Oil Operator | Dec 2023 |
| 7967 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Apr 2026 |
| 7968 | DLM Energy | Houston, TX 77058 | Oil & Gas Operator | Sep 1994 |
| 7969 | DLM Oil | | Oil Operator | Nov 2008 |
| 7970 | DLM Ventures | | Oil & Gas Operator | Dec 2004 |
| 7971 | DLM Ventures LLC | | Oil & Gas Operator | Dec 2004 |
| 7972 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 7973 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Mar 2026 |
| 7974 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Feb 2026 |
| 7975 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 7976 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 7977 | DMV Pipeline LLC | Lipan, TX 76462 | Oil & Gas Operator | Jun 2026 |
| 7978 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 7979 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 7980 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 7981 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Apr 2026 |
| 7982 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 7983 | Dobbs Oil & Gas | | Oil Operator | Dec 2013 |
| 7984 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Jun 2026 |
| 7985 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 7986 | Dobson Oil And Gas LLC | Deer Creek, OK 74636 | Oil Operator | Aug 2022 |
| 7987 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 7988 | Doc Oil | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2019 |
| 7989 | Doc Oil Corp. | | Oil Operator | Dec 2006 |
| 7990 | Doc'S Tank Trucks | Jacksboro, TX 76458 | Oil Operator | Jun 2007 |
| 7991 | Docherty Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 7992 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 7993 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 7994 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2026 |
| 7995 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 7996 | Dodson Prairie Oil & Gas LLC | San Antonio, TX 78205 | Gas Operator | Jun 2026 |
| 7997 | Dodson, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 1998 |
| 7998 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 7999 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | Jun 2026 |
| 8000 | Doege, Harry | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |