| 7201 | Daleco Resources, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Mar 2008 |
| 7202 | Dalen Resources Oil & Gas | Dallas, TX 75206-3922 | Oil & Gas Operator | Jan 1996 |
| 7203 | Dalen Resources Oil & Gas Co | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 7204 | Dales Oil Company | Loving, TX 76460 | Oil Operator | Jun 2026 |
| 7205 | Dales Tank Service Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Mar 2026 |
| 7206 | Dalf Energy LLC | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 7207 | Dallas DRLG. & Development Co. | | Oil & Gas Operator | Apr 1987 |
| 7208 | Dallas Energy LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 7209 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |
| 7210 | Dallas Petroleum Group, LLC | Dallas, TX 75379 | Oil & Gas Operator | Jun 2026 |
| 7211 | Dallas Production | Dallas, TX 75206 | Oil & Gas Operator | Sep 1996 |
| 7212 | Dallas Production Company LLC | Dallas, TX 75206 | Oil & Gas Operator | Jun 2026 |
| 7213 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 7214 | Dallas Resources, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 1997 |
| 7215 | Dallas Royalty, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2012 |
| 7216 | Dally'S Oil Co. LLC | Monahans, TX 79756 | Oil Operator | Jun 2026 |
| 7217 | Dalnor Corporation | | Oil & Gas Operator | Nov 2010 |
| 7218 | Dalport Oil Corporation | Dallas, TX 75202 | Oil & Gas Operator | Apr 1993 |
| 7219 | Dalton & Hanna LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2018 |
| 7220 | Dalton J. Woods | | Oil & Gas Operator | Dec 1985 |
| 7221 | Damar Resc Incor | | Oil Operator | Oct 1995 |
| 7222 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 7223 | Dameron Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2026 |
| 7224 | Damian Oil, Inc. | | Oil & Gas Operator | Dec 2024 |
| 7225 | Damron Energy | Eden, TX 76837 | Oil & Gas Operator | Jan 2015 |
| 7226 | Damron Energy, LLC | Eden, TX 76837 | Oil & Gas Operator | Jun 2026 |
| 7227 | Damson Oil Corpo | | Oil & Gas Operator | May 1994 |
| 7228 | Damson Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Mar 2005 |
| 7229 | Damson-Franks-McCord-Goodrich | | Oil & Gas Operator | Aug 1984 |
| 7230 | Dan A. Hughes Company | | Oil & Gas Operator | Dec 2005 |
| 7231 | Dan A. Hughes Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Mar 2026 |
| 7232 | Dan C Berry | Eunice, NM 88231 | Oil Operator | Oct 1995 |
| 7233 | Dan Owens | | Oil & Gas Operator | Jul 1993 |
| 7234 | Dan Strong Jr | Midland, TX 79702 | Oil & Gas Operator | Mar 1994 |
| 7235 | Dan Texas Company | Waco, TX 76710 | Oil & Gas Operator | Sep 1998 |
| 7236 | Dana Petroleum Inc | Salt Lake City, UT 84047 | Oil & Gas Operator | Nov 1998 |
| 7237 | Dance Oil Co | Denver, CO 80202 | Oil & Gas Operator | May 1993 |
| 7238 | Danco Enterprises Inc | Ada, OK 74820 | Oil Operator | Apr 2008 |
| 7239 | Danco Oil & Gas | White Deer, TX 79097 | Oil & Gas Operator | Aug 2013 |
| 7240 | Dane G. Hansen Trust | | Oil Operator | Dec 1994 |
| 7241 | Danick Operating USA Inc | McKinney, TX 75072-9071 | Oil & Gas Operator | Oct 2022 |
| 7242 | Daniel B. Robinett | | Oil & Gas Operator | Dec 1990 |
| 7243 | Daniel Explorations Inc | Georgetown, TX 78627 | Oil & Gas Operator | Apr 2009 |
| 7244 | Daniel Mineral Development, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2007 |
| 7245 | Daniel Oil & Gas | Granbury, TX 76049 | Oil & Gas Operator | Oct 2010 |
| 7246 | Daniel Oil Company | | Oil & Gas Operator | Jan 1983 |
| 7247 | Daniel P Hornburg | Clarendon, PA 16313-2324 | Oil & Gas Operator | Dec 2025 |
| 7248 | Daniel Resource Dev Inc | Tomball, TX 77375-8919 | Oil & Gas Operator | Oct 2009 |
| 7249 | Daniel, Freeman | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 7250 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 7251 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | Jun 2026 |
| 7252 | Daniels Danny | Tishomingo, OK 73460-0853 | Oil Operator | Apr 2015 |
| 7253 | Daniels E L Dril | | Oil Operator | Nov 1995 |
| 7254 | Daniels Earlene Inc | Follett, TX 79034-9736 | Oil & Gas Operator | Mar 2015 |
| 7255 | Daniels Energy | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 7256 | Daniels Oil Co. | | Oil Operator | Nov 2025 |
| 7257 | Daniels Petroleu | | Oil Operator | Jan 1991 |
| 7258 | Daniels Petroleum Co | Denver, CO 80202 | Oil & Gas Operator | Mar 2003 |
| 7259 | Daniels, C. W. | Stockdale, TX 78160 | Oil & Gas Operator | Dec 2009 |
| 7260 | Daniels, Earlene | Follett, TX 79034 | Oil & Gas Operator | Feb 2002 |
| 7261 | Daniels, J.C. Energy | Pampa, TX 79066 | Oil & Gas Operator | Apr 2001 |
| 7262 | Dankbar, LLC | Kevin, MT 59454 | Oil Operator | May 2026 |
| 7263 | Danmar Production Company LLC | | Oil & Gas Operator | Dec 2022 |
| 7264 | Danmark Energy Services, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Apr 2021 |
| 7265 | Dannic Energy Corp | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2025 |
| 7266 | Danny Engel Operating LLC | Ada, OK 74820-1388 | Oil Operator | Apr 2026 |
| 7267 | Danny Glass | | Oil Operator | Jan 1987 |
| 7268 | Danny Long & Sons Inc | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2025 |
| 7269 | Danos Oil & Gas LLC | | Oil & Gas Operator | Oct 2024 |
| 7270 | Dant Operating Company Inc. | | Oil & Gas Operator | Jan 1989 |
| 7271 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 7272 | Dao Oil And Gas | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jun 2026 |
| 7273 | Dapsco, Inc. | | Oil & Gas Operator | Dec 1976 |
| 7274 | Dar-Lon Operating Company | Lamont, OK 74643 | Oil & Gas Operator | Oct 2000 |
| 7275 | Dara Operating Company, LLC | Electra, TX 76360 | Oil & Gas Operator | Jun 2026 |
| 7276 | Darco Operators | Big Lake, TX 76932 | Oil & Gas Operator | Jun 2026 |
| 7277 | Darco Petroleum Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Dec 2020 |
| 7278 | Dardan Expl Inc-H Edison Ellis | | Oil & Gas Operator | Apr 1990 |
| 7279 | Darden Energy Corp | Hennessey, OK 73742 | Oil & Gas Operator | Jul 1999 |
| 7280 | Dark Canyon Resources LLC | Refugio, TX 78377 | Oil Operator | Jun 2026 |
| 7281 | Dark Horse | | Oil Operator | Feb 2026 |
| 7282 | Dark Horse Operating Co., L.L.C. | Denton, TX 76202 | Oil & Gas Operator | Oct 2022 |
| 7283 | Dark Horse Producing Of TX, L.P. | Alice, TX 78333 | Oil & Gas Operator | Jun 2026 |
| 7284 | Darkens Oil & Gas Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Jun 2026 |
| 7285 | Darley Enterprises, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Jan 2012 |
| 7286 | Darling Dan Oil | | Oil & Gas Operator | Sep 2018 |
| 7287 | Darling Oil Corporation | Lamont, OK 74643 | Oil & Gas Operator | Mar 2026 |
| 7288 | Darnall, Walter E. | Chautauqua, KS 67334 | Oil Operator | Dec 2009 |
| 7289 | Darnell Alma | Bristow, OK 74010 | Oil & Gas Operator | Jun 2000 |
| 7290 | Darnell Bobby J | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Apr 2026 |
| 7291 | Darr-Hey Oil, LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2026 |
| 7292 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 7293 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Apr 2026 |
| 7294 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Jun 2026 |
| 7295 | Darrell'S Drilling Inc | Konawa, OK 74849 | Oil Operator | Mar 2026 |
| 7296 | Darriel C Ray | | Oil Operator | Jun 2020 |
| 7297 | Darsey Operating Corporation | | Oil & Gas Operator | Sep 1990 |
| 7298 | Darst Creek Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Mar 2021 |
| 7299 | Dart Cherokee Basin Operating Co., LLC | Mason, MI 48854 | Oil & Gas Operator | Feb 2026 |
| 7300 | Dart Oil & Gas Corporation | Mason, MI 48854 | Oil & Gas Operator | Jun 2018 |