| 8101 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 8102 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 8103 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Jun 2025 |
| 8104 | Diversified Natural Res., Inc. | | Oil Operator | May 2000 |
| 8105 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | May 2025 |
| 8106 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 8107 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Jul 2025 |
| 8108 | Diversified Resources LLC | | Gas Operator | Apr 2025 |
| 8109 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 8110 | Diversified Southern Production LLC | | Oil & Gas Operator | Dec 2018 |
| 8111 | Diversity Petroleum, LP | Rockwall, TX 75087 | Oil & Gas Operator | Aug 2010 |
| 8112 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 8113 | Divine'S Service & Repairs Inc | | Oil & Gas Operator | Mar 1997 |
| 8114 | Dixie Drilling Company, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Nov 2011 |
| 8115 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 8116 | Dixie Oil Company Inc | Moore, OK 73153 | Oil & Gas Operator | Nov 1994 |
| 8117 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 8118 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Dec 2024 |
| 8119 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 8120 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 8121 | Dixie Well Service, Inc. | | Oil & Gas Operator | Jul 1995 |
| 8122 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 8123 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 8124 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Dec 2024 |
| 8125 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 8126 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 8127 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 8128 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 8129 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 8130 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Mar 2025 |
| 8131 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 8132 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Mar 2025 |
| 8133 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Jul 2025 |
| 8134 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2025 |
| 8135 | DJ Production Services Inc | | Oil & Gas Operator | Sep 2012 |
| 8136 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 8137 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 8138 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | Jul 2025 |
| 8139 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 8140 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Jul 2025 |
| 8141 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | May 2025 |
| 8142 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2024 |
| 8143 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2024 |
| 8144 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 8145 | DK Oil Company | Winters, TX 79567 | Oil & Gas Operator | Jul 2022 |
| 8146 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Jan 2025 |
| 8147 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Jun 2025 |
| 8148 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 8149 | DKM Offshore Energy Inc. | | Oil & Gas Operator | Dec 1993 |
| 8150 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 8151 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 8152 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 8153 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Jul 2025 |
| 8154 | DL Energy, LLC | Saco, MT 59261 | Gas Operator | Mar 2025 |
| 8155 | DL Resources Inc | Ludlow, PA 16333-0039 | Oil & Gas Operator | Dec 2024 |
| 8156 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 8157 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jul 2025 |
| 8158 | DLJ Investments, LLC | Springboro, OH 45006 | Oil Operator | Dec 2023 |
| 8159 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Apr 2025 |
| 8160 | DLM Energy | Houston, TX 77058 | Oil & Gas Operator | Sep 1994 |
| 8161 | DLM Oil | | Oil Operator | Nov 2008 |
| 8162 | DLM Ventures | | Oil & Gas Operator | Dec 2004 |
| 8163 | DLM Ventures LLC | | Oil & Gas Operator | Dec 2004 |
| 8164 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 8165 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Apr 2025 |
| 8166 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Mar 2025 |
| 8167 | DML Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2025 |
| 8168 | DMS Investments Inc | Tulsa, OK 74132-2690 | Oil & Gas Operator | Mar 2015 |
| 8169 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 8170 | DMV Pipeline LLC | Plano, TX 75074 | Oil & Gas Operator | Jul 2025 |
| 8171 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 8172 | DNB Drilling, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2001 |
| 8173 | DNL Oil Corp | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2012 |
| 8174 | DNR Oil And Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2025 |
| 8175 | Dobbins Family Residual Trust | Ardmore, OK 73401 | Oil Operator | Jul 2008 |
| 8176 | Dobbs Oil & Gas | | Oil Operator | Dec 2013 |
| 8177 | Dobbs Petroleum Co. | Abilene, TX 79606 | Oil & Gas Operator | Jul 2025 |
| 8178 | Dobrinski, Mark E., A General Partnership | Coldwater, KS 67029 | Oil Operator | Feb 2008 |
| 8179 | Dobson Oil And Gas LLC | Deer Creek, OK 74636 | Oil Operator | Aug 2022 |
| 8180 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 8181 | Doc Oil | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2019 |
| 8182 | Doc Oil Corp. | | Oil Operator | Dec 2006 |
| 8183 | Doc'S Tank Trucks | Jacksboro, TX 76458 | Oil Operator | Jun 2007 |
| 8184 | Docherty Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 8185 | Docking Developm | | Oil & Gas Operator | Dec 1996 |
| 8186 | Docking Development Company, LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Oct 2013 |
| 8187 | Doco Development Corporation | Norman, OK 73072 | Oil & Gas Operator | May 2025 |
| 8188 | Dodd Oil & Gas | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 8189 | Dodd, C. C., Oil & Gas | | Oil & Gas Operator | Dec 2021 |
| 8190 | Dodson Prairie Oil & Gas LLC | San Antonio, TX 78205 | Gas Operator | Jul 2025 |
| 8191 | Dodson, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 1998 |
| 8192 | Dodson, Wayne Consultants, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jul 2003 |
| 8193 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | Jul 2025 |
| 8194 | Doege, Harry | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 8195 | Doggy Oil Corp | Decatur, GA 30031 | Oil & Gas Operator | Jul 2025 |
| 8196 | Dogwood Operating Company, Inc. | Houston, TX 77069 | Oil & Gas Operator | Jul 2025 |
| 8197 | Dol Resources Inc | Rowlett, TX 75088 | Oil & Gas Operator | Jun 2025 |
| 8198 | Dolberry Energy Resources Corp. | Dallas, TX 75252 | Oil Operator | Jul 2025 |
| 8199 | Dolch Production, Inc. | San Antonio, TX 78248 | Oil & Gas Operator | Jul 1996 |
| 8200 | Dole Enterprises Inc. | | Oil & Gas Operator | May 2025 |