| 8101 | Dietrich Foundation | Pittsburgh, PA 15219 | Gas Operator | Dec 2024 |
| 8102 | Dietrich Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jul 2000 |
| 8103 | Dietrich Philip H | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2023 |
| 8104 | Dietrich Resources Corporation | | Oil & Gas Operator | Jun 2007 |
| 8105 | Dietz Oil Field Supply | Dover, OH 44622 | Oil & Gas Operator | Dec 1997 |
| 8106 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Mar 2025 |
| 8107 | Digital Operating Company LLC | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 8108 | Dildine Oil Well Service | | Oil Operator | Apr 2011 |
| 8109 | Diler Development Inc. | Garland, TX 75043 | Oil & Gas Operator | May 2025 |
| 8110 | Dillard & Dillard Inc. | Holliday, TX 76366 | Oil & Gas Operator | May 2025 |
| 8111 | Dillard, A. W., Jr. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 8112 | Diller Oil Company | Baird, TX 79504 | Oil Operator | May 2025 |
| 8113 | Dilley Corp | Yale, OK 74085 | Oil & Gas Operator | May 2013 |
| 8114 | Dilley, W.R. & A'Meta I. | Sedan, KS 67361 | Oil Operator | Nov 2015 |
| 8115 | Dilligas, Inc. | | Oil Operator | May 1990 |
| 8116 | Dillingham Ranch LC | Tulsa, OK 74152 | Oil & Gas Operator | May 2013 |
| 8117 | Dillon, H. L., Jr. | Houston, TX 77027 | Oil & Gas Operator | Mar 1996 |
| 8118 | Dils Oil & Gas | Parkersburg, WV 26102 | Oil & Gas Operator | Dec 2023 |
| 8119 | Dils, Sherman III Dba Dils Oil & Gas | | Oil & Gas Operator | Dec 2020 |
| 8120 | Dime Box Oil Company | Austin, TX 78759 | Oil & Gas Operator | Mar 2008 |
| 8121 | Dimension Energy Co., L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 8122 | Dimes Energy GP Inc. | Olean, NY 14760 | Oil & Gas Operator | Dec 2023 |
| 8123 | Dimick Production, LLC | Hamilton, KS 66853 | Oil Operator | Jan 2025 |
| 8124 | Dimmit County SWD, LLC | Carrizo SPGS, TX 78834 | Oil Operator | May 2025 |
| 8125 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | May 2025 |
| 8126 | Dimock Petroleum | Dallas, TX 75205 | Oil Operator | Apr 2014 |
| 8127 | Dinero Oil Corporation | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Nov 1999 |
| 8128 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 8129 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | May 2025 |
| 8130 | Dinsmore C E | Enid, OK 73702 | Oil & Gas Operator | May 2009 |
| 8131 | Direct Petroleum Exploration Inc | | Oil & Gas Operator | Aug 2010 |
| 8132 | Directional Drilling Systems, LLC | Greenwood VIllage, CO 80111 | Oil Operator | Dec 2019 |
| 8133 | Dirks Petroleum Company | Beeville, TX 78104 | Oil & Gas Operator | May 2025 |
| 8134 | Dirks, R. W. | Tuleta, TX 78162 | Oil & Gas Operator | May 1999 |
| 8135 | Dirks, R.W. Pet. Eng. Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Jul 1999 |
| 8136 | Dirnett, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | May 2025 |
| 8137 | Dirty Devil LP | Eenglewood, CO 80111 | Oil & Gas Operator | Apr 1989 |
| 8138 | Discorbis Oil Company | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2019 |
| 8139 | Discover Resources | Norman, OK 73070 | Oil & Gas Operator | Jan 2011 |
| 8140 | Discover Resources LLC | Norman, OK 73072-2310 | Oil & Gas Operator | Mar 2025 |
| 8141 | Discovery Energy Corp. CC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2025 |
| 8142 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 8143 | Discovery Energy, LLC | | Oil Operator | Jan 2007 |
| 8144 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 8145 | Discovery Oil & Gas LLC | Canonsburg, PA 15317-9557 | Gas Operator | Dec 2024 |
| 8146 | Discovery Oil And Gas | Canonburg, PA 15317 | Oil & Gas Operator | Dec 2024 |
| 8147 | Discovery Oil LTD | Los Angeles, CA 90067 | Oil & Gas Operator | Jan 1993 |
| 8148 | Discovery Operat | | Gas Operator | Jul 1988 |
| 8149 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 8150 | Discovery Operating, LLC | | Oil & Gas Operator | Oct 2023 |
| 8151 | Discovery Petroleum, L.L.C. | Alice, TX 78333 | Oil & Gas Operator | May 2025 |
| 8152 | Discus Oil Corporation | | Oil & Gas Operator | Dec 2002 |
| 8153 | Ditta Exploration Co., Inc. | | Oil & Gas Operator | Feb 1990 |
| 8154 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 8155 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 8156 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Apr 2025 |
| 8157 | Diversified Natural Res., Inc. | | Oil Operator | May 2000 |
| 8158 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Mar 2025 |
| 8159 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 8160 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | May 2025 |
| 8161 | Diversified Resources LLC | | Gas Operator | Feb 2025 |
| 8162 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 8163 | Diversified Southern Production LLC | | Oil & Gas Operator | Dec 2018 |
| 8164 | Diversity Petroleum, LP | Rockwall, TX 75087 | Oil & Gas Operator | Aug 2010 |
| 8165 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 8166 | Divine'S Service & Repairs Inc | | Oil & Gas Operator | Mar 1997 |
| 8167 | Dixie Drilling Company, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Nov 2011 |
| 8168 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 8169 | Dixie Oil Company Inc | Moore, OK 73153 | Oil & Gas Operator | Nov 1994 |
| 8170 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 8171 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Dec 2024 |
| 8172 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 8173 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 8174 | Dixie Well Service, Inc. | | Oil & Gas Operator | Jul 1995 |
| 8175 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Feb 2025 |
| 8176 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 8177 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 8178 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Dec 2024 |
| 8179 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 8180 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 8181 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Jan 2025 |
| 8182 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 8183 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 8184 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Jan 2025 |
| 8185 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 8186 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Jan 2025 |
| 8187 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | May 2025 |
| 8188 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | May 2025 |
| 8189 | DJ Production Services Inc | | Oil & Gas Operator | Sep 2012 |
| 8190 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 8191 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 8192 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | May 2025 |
| 8193 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 8194 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | May 2025 |
| 8195 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Mar 2025 |
| 8196 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2024 |
| 8197 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2023 |
| 8198 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 8199 | DK Oil Company | Winters, TX 79567 | Oil & Gas Operator | Jul 2022 |
| 8200 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Jan 2025 |