| 8001 | Discover Resources | Norman, OK 73070 | Oil & Gas Operator | Jan 2011 |
| 8002 | Discover Resources LLC | Norman, OK 73072-2310 | Oil & Gas Operator | Sep 2024 |
| 8003 | Discovery Energy Corp. CC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Nov 2024 |
| 8004 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2024 |
| 8005 | Discovery Energy, LLC | | Oil Operator | Jan 2007 |
| 8006 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 8007 | Discovery Oil And Gas | Canonburg, PA 15317 | Oil & Gas Operator | Dec 2023 |
| 8008 | Discovery Oil LTD | Los Angeles, CA 90067 | Oil & Gas Operator | Jan 1993 |
| 8009 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Nov 2024 |
| 8010 | Discovery Operating, LLC | | Oil & Gas Operator | Oct 2023 |
| 8011 | Discovery Petroleum, L.L.C. | Alice, TX 78333 | Oil & Gas Operator | Nov 2024 |
| 8012 | Discus Oil Corporation | | Oil & Gas Operator | Dec 2002 |
| 8013 | Dishman, Mitchell & Gorin, Inc | | Oil Operator | Dec 2022 |
| 8014 | Ditta Exploration Co., Inc. | | Oil & Gas Operator | Feb 1990 |
| 8015 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 8016 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 8017 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Jul 2024 |
| 8018 | Diversified Natural Res., Inc. | | Oil Operator | Apr 2000 |
| 8019 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2022 |
| 8020 | Diversified Operating Corporation | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 8021 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Nov 2024 |
| 8022 | Diversified Resources LLC | | Gas Operator | Aug 2024 |
| 8023 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 8024 | Diversified Southern Production LLC | | Oil & Gas Operator | Dec 2018 |
| 8025 | Diversity Petroleum, LP | Rockwall, TX 75087 | Oil & Gas Operator | Aug 2010 |
| 8026 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 8027 | Divine'S Service & Repairs Inc | | Oil & Gas Operator | Mar 1997 |
| 8028 | Dixie Drilling Company, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Nov 2011 |
| 8029 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 8030 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 8031 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Jun 2024 |
| 8032 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 8033 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 8034 | Dixie Well Service, Inc. | | Oil & Gas Operator | Jul 1995 |
| 8035 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Aug 2024 |
| 8036 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 8037 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 8038 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Jan 2024 |
| 8039 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 8040 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 8041 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2024 |
| 8042 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 8043 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 8044 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Jul 2024 |
| 8045 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 8046 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Jul 2024 |
| 8047 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Nov 2024 |
| 8048 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Nov 2024 |
| 8049 | DJ Production Services Inc | | Oil & Gas Operator | Sep 2012 |
| 8050 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 8051 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 8052 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | Nov 2024 |
| 8053 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 8054 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Nov 2024 |
| 8055 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Sep 2024 |
| 8056 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2023 |
| 8057 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2023 |
| 8058 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 8059 | DK Oil Company | Winters, TX 79567 | Oil & Gas Operator | Jul 2022 |
| 8060 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Jul 2024 |
| 8061 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Sep 2024 |
| 8062 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 8063 | DKM Offshore Energy Inc. | | Oil & Gas Operator | Dec 1993 |
| 8064 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 8065 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 8066 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 8067 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Nov 2024 |
| 8068 | DL Energy, LLC | Saco, MT 59261 | Gas Operator | Aug 2024 |
| 8069 | DL Resources Inc | Ludlow, PA 16333-0039 | Oil & Gas Operator | Apr 2024 |
| 8070 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 8071 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Nov 2024 |
| 8072 | DLJ Investments, LLC | Springboro, OH 45006 | Oil Operator | Dec 2022 |
| 8073 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Sep 2024 |
| 8074 | DLM Energy | Houston, TX 77058 | Oil & Gas Operator | Sep 1994 |
| 8075 | DLM Oil | | Oil Operator | Nov 2008 |
| 8076 | DLM Ventures | | Oil & Gas Operator | Dec 2004 |
| 8077 | DLM Ventures LLC | | Oil & Gas Operator | Dec 2004 |
| 8078 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 8079 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Sep 2024 |
| 8080 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Jul 2024 |
| 8081 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 8082 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Aug 2024 |
| 8083 | DMV Pipeline LLC | Plano, TX 75074 | Oil & Gas Operator | Nov 2024 |
| 8084 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 8085 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 8086 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 8087 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Sep 2024 |
| 8088 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 8089 | Dobbs Oil & Gas | | Oil Operator | Dec 2013 |
| 8090 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Nov 2024 |
| 8091 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 8092 | Dobson Oil And Gas LLC | Deer Creek, OK 74636-9521 | Oil Operator | Aug 2022 |
| 8093 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 8094 | Doc Oil | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2019 |
| 8095 | Doc Oil Corp. | | Oil Operator | Dec 2006 |
| 8096 | Doc'S Tank Trucks | Jacksboro, TX 76458 | Oil Operator | Jun 2007 |
| 8097 | Docherty Operating, L.L.C. | | Oil Operator | Jun 2024 |
| 8098 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 8099 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 8100 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | Sep 2024 |