| 8101 | Devx Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Feb 2004 |
| 8102 | Dew Oil And Gas Co.,Inc. | | Oil & Gas Operator | Dec 1989 |
| 8103 | Dewayne'S Tank Service, Inc. | Saint John, KS 67576 | Oil Operator | Nov 2000 |
| 8104 | Dewbre Petroleum Corporation | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Apr 2025 |
| 8105 | Dewbre, Jerry C., Trustee | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Apr 2025 |
| 8106 | Dewco Exploration | Coleman, TX 76834 | Oil & Gas Operator | Nov 2007 |
| 8107 | Dewco Oil | | Oil Operator | Jun 1996 |
| 8108 | Dewey E. Williams | | Oil Operator | Nov 1978 |
| 8109 | Dewey Energy GP LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2022 |
| 8110 | Dewey Enterprises Inc | | Oil & Gas Operator | Jan 2025 |
| 8111 | Dewey Petroleum | Midland, TX 79707 | Oil & Gas Operator | Dec 2020 |
| 8112 | Dewey White Etal | | Oil & Gas Operator | Dec 1987 |
| 8113 | Dewey Williams | | Oil Operator | Mar 1992 |
| 8114 | Dews Production LLC | Magnolia, AR 71753 | Oil & Gas Operator | Dec 2024 |
| 8115 | Dexco, Inc. | | Oil & Gas Operator | May 1990 |
| 8116 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2025 |
| 8117 | DFG Energy Company LLC | Richardson, TX 75081 | Oil & Gas Operator | Apr 2025 |
| 8118 | DFP Oil Company | Tulsa, OK 74114-1345 | Oil & Gas Operator | Dec 2004 |
| 8119 | DG&E/Slocum, Limited Partnership | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 8120 | DGH Oil, LLC | Logan, KS 67646 | Oil Operator | Dec 2024 |
| 8121 | DGH Petroleum, Inc. | | Oil & Gas Operator | Aug 2011 |
| 8122 | DGP Energy, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Jan 2025 |
| 8123 | DH Operating, Inc. | Gordon, TX 76453 | Oil & Gas Operator | Apr 2025 |
| 8124 | DH Production | Albany, TX 76430 | Oil Operator | Dec 2005 |
| 8125 | DHC, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 1997 |
| 8126 | DHP Investments, LTD. | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 8127 | DHW Energy LLC | | Oil Operator | Dec 2023 |
| 8128 | Di Energy Inc. | Houston, TX 77067 | Oil & Gas Operator | Jan 2004 |
| 8129 | Diablo Oil Corp. | | Oil & Gas Operator | Apr 1989 |
| 8130 | Diamar Oil Company, Inc. | | Oil Operator | Nov 1983 |
| 8131 | Diamex Company | | Oil & Gas Operator | Oct 1982 |
| 8132 | Diamond "S" Oil, Inc. | Houston, TX 77065 | Oil & Gas Operator | Apr 1994 |
| 8133 | Diamond A Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2001 |
| 8134 | Diamond B Company Inc | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2010 |
| 8135 | Diamond B Indust | | Oil Operator | Nov 1996 |
| 8136 | Diamond B Industries Inc | Belle Fourche, SD 57717 | Oil & Gas Operator | Apr 2010 |
| 8137 | Diamond B Miami Flood, LTD. | Paola, KS 66071 | Oil Operator | Dec 2024 |
| 8138 | Diamond Chemical | | Oil & Gas Operator | Jan 1995 |
| 8139 | Diamond Cross Oil Co LLC | Ponca City, OK 74601-1104 | Oil & Gas Operator | Jan 2025 |
| 8140 | Diamond D Operating | | Oil & Gas Operator | Apr 1995 |
| 8141 | Diamond Dixie Ex | | Oil Operator | Jul 1985 |
| 8142 | Diamond Drilling Co. | | Oil Operator | Apr 1983 |
| 8143 | Diamond E Oil Company LLC | Hominy, OK 74035-0676 | Oil Operator | Jan 2025 |
| 8144 | Diamond Endeavors Inc | | Oil Operator | Dec 2020 |
| 8145 | Diamond Energy Operating Company | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2005 |
| 8146 | Diamond Energy Partners LLC | Collinsville, OK 74021 | Oil & Gas Operator | Jan 2025 |
| 8147 | Diamond Energy Services LLC | Tulsa, OK 74103-3862 | Oil & Gas Operator | Jan 2016 |
| 8148 | Diamond Energy Services, LP | Tulsa, OK 74103 | Oil Operator | Apr 2025 |
| 8149 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Apr 2025 |
| 8150 | Diamond G Production | FT Stockton, TX 79735 | Oil & Gas Operator | Apr 2025 |
| 8151 | Diamond Halo Group LLC | Grandview, TX 76050 | Oil Operator | Sep 2024 |
| 8152 | Diamond Harry H Inc | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 8153 | Diamond M DRLG & Expl Co. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2025 |
| 8154 | Diamond M Oil Co., Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 8155 | Diamond Mineral Investments Inc. | Bangs, TX 76823 | Gas Operator | Feb 2008 |
| 8156 | Diamond Oil & Gas LLC | Casper, WY 82604 | Oil & Gas Operator | Feb 2025 |
| 8157 | Diamond Oil And Gas, Inc. | Kalamazoo, MI 49001 | Oil & Gas Operator | Apr 2025 |
| 8158 | Diamond Oil Co | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1992 |
| 8159 | Diamond Onshore Production, L. L. C. | | Oil & Gas Operator | Sep 2005 |
| 8160 | Diamond Operating, Inc. | | Oil & Gas Operator | Feb 2022 |
| 8161 | Diamond Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2010 |
| 8162 | Diamond Petroleum LLC | | Oil & Gas Operator | Dec 2005 |
| 8163 | Diamond Production Company LLC | Irving, TX 75016-7853 | Oil & Gas Operator | Dec 2024 |
| 8164 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2025 |
| 8165 | Diamond S Gathering Co | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 8166 | Diamond S Masada LLC | Magnolia, TX 77354 | Oil & Gas Operator | Apr 2025 |
| 8167 | Diamond S Operating Co. | | Oil & Gas Operator | Oct 1992 |
| 8168 | Diamond Shamrock Chem Co | Irving, TX 75061 | Oil & Gas Operator | Dec 1990 |
| 8169 | Diamond Shamrock Corp | Amarillo, TX 79105 | Oil & Gas Operator | Jan 1987 |
| 8170 | Diamond Shamrock Expl | Dallas, TX 75201 | Oil & Gas Operator | May 1987 |
| 8171 | Diamond Shamrock Expl. Co. | | Oil & Gas Operator | Jun 1987 |
| 8172 | Diamond Star Oil, Inc. | Lacygne, KS 66040 | Oil Operator | Dec 2019 |
| 8173 | Diamond T F Enterprises, Inc. | Sonora, TX 76950 | Gas Operator | Apr 2025 |
| 8174 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 8175 | Diamondback Oil Partners LLP | Arvada, CO 80004 | Oil & Gas Operator | Dec 2016 |
| 8176 | Diamondback Operating, LP | Tulsa, OK 74132 | Gas Operator | Apr 2025 |
| 8177 | Diamondback Resources LLC | Midland, TX 79705 | Oil & Gas Operator | May 2018 |
| 8178 | Diamondback-Disposal LLC | Oklahoma City, OK 73134-1016 | Oil Operator | Dec 2008 |
| 8179 | Diamondhead Oil Co., LLC | | Oil & Gas Operator | Jan 2025 |
| 8180 | Diana Pease & Steve Pease Revocable Trust | Wellsville, NY 14895 | Gas Operator | Dec 2023 |
| 8181 | Diane Oil Company | Oklahoma City, OK 73146 | Oil & Gas Operator | Feb 2025 |
| 8182 | Diasu Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 8183 | Dibiaggio, Deirdre And Katherine Carmichael | Atlantis, FL 33463 | Gas Operator | Dec 2023 |
| 8184 | Dick Lindsay Oil Company, Inc. | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 8185 | Dickerson Oil | Ratliff City, OK 73481 | Oil Operator | Jan 2025 |
| 8186 | Dickey Energy Company | Grafton, WV 26354 | Gas Operator | Dec 2015 |
| 8187 | Dickson Petroleum | Midland, TX 79710 | Oil & Gas Operator | Nov 1998 |
| 8188 | Dickson Petroleum, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2000 |
| 8189 | Didomenico, Thomas J | Jamestown, NY 14701 | Gas Operator | Dec 2023 |
| 8190 | Diehl Glenn D Oi | | Oil Operator | Jul 1993 |
| 8191 | Diehl Mark | | Oil Operator | Nov 1998 |
| 8192 | Diehl Oil Inc | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 8193 | Dieter Prod Comp | | Oil & Gas Operator | Feb 1991 |
| 8194 | Dieter Production Company | Durham, KS 67438 | Gas Operator | Mar 2013 |
| 8195 | Dietrich Foundation | Pittsburgh, PA 15219 | Gas Operator | Dec 2024 |
| 8196 | Dietrich Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jul 2000 |
| 8197 | Dietrich Philip H | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2023 |
| 8198 | Dietrich Resources Corporation | | Oil & Gas Operator | Jun 2007 |
| 8199 | Dietz Oil Field Supply | Dover, OH 44622 | Oil & Gas Operator | Dec 1997 |
| 8200 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Feb 2025 |