| 7201 | D & N Oil Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 7202 | D & N Operating Corp | Belpre, OH 45714-8181 | Oil & Gas Operator | Dec 2019 |
| 7203 | D & P Operating & Prod. Corp. | Cedar Park, TX 78613 | Oil & Gas Operator | Dec 2003 |
| 7204 | D & P Tank Service, Inc. | | Oil Operator | Mar 2000 |
| 7205 | D & R Energy | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 7206 | D & R Enterprises | Eastland, TX 76448 | Oil & Gas Operator | Oct 2020 |
| 7207 | D & R Oil Properties | | Oil Operator | May 1998 |
| 7208 | D & R Oil, Inc. | Galva, KS 67443 | Oil & Gas Operator | Jul 2024 |
| 7209 | D & R Well Service, Inc. | Galva, KS 67443 | Oil & Gas Operator | Feb 2025 |
| 7210 | D & S Energy Corp | Tiona, PA 16352-0102 | Oil & Gas Operator | Dec 2018 |
| 7211 | D & S Oil Co. #1 | Borger, TX 79007 | Oil & Gas Operator | Jul 2025 |
| 7212 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jul 2025 |
| 7213 | D & S Operating | Texhoma, OK 73949 | Oil & Gas Operator | May 2001 |
| 7214 | D & T Company | Denver, CO 80210 | Oil & Gas Operator | Jun 1983 |
| 7215 | D & T Oil | Bremen, OH 43107 | Oil & Gas Operator | Dec 2011 |
| 7216 | D & T Oil Company | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 7217 | D & T Swabbing & Well Serv Inc | Hennessey, OK 73742-0124 | Oil & Gas Operator | Apr 2025 |
| 7218 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 7219 | D & V Petroleum Corporation | | Oil & Gas Operator | May 1992 |
| 7220 | D & W Oil & Gas Co. | | Gas Operator | Jan 1990 |
| 7221 | D & W Oil Compan | | Oil Operator | Jan 1987 |
| 7222 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 7223 | D & Z Exploration, Inc. | St Elmo, IL 62458 | Oil Operator | Mar 2025 |
| 7224 | D And B Brine Inc | | Oil Operator | Mar 2025 |
| 7225 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 7226 | D B D Oil & Gas Company | Houston, TX 77001 | Oil & Gas Operator | Mar 2015 |
| 7227 | D C Bintliff & W W F Oil Corp. | | Oil & Gas Operator | Dec 1989 |
| 7228 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 7229 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 7230 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Jul 2025 |
| 7231 | D C Oil, Inc | Whitesville, KY 42378 | Oil Operator | Dec 2017 |
| 7232 | D D Natural Resources LLC | | Oil & Gas Operator | May 2025 |
| 7233 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Jul 2025 |
| 7234 | D H & L Operating, Inc. | | Oil & Gas Operator | Sep 1983 |
| 7235 | D H Hunt | Dallas, TX 75201 | Oil & Gas Operator | Dec 1994 |
| 7236 | D J Oil Operations | | Oil Operator | Dec 2009 |
| 7237 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 7238 | D J Simmons, Inc | Farmington, NM 87499 | Oil & Gas Operator | Apr 2020 |
| 7239 | D K Cook Heirs LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2011 |
| 7240 | D K Oil Services LLC | Wellsville, KS 66092 | Oil Operator | Nov 2019 |
| 7241 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 7242 | D M Norman | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |
| 7243 | D N C Enterprises Inc | Farmington, NM 87402 | Oil & Gas Operator | Feb 2005 |
| 7244 | D N Stover Inc | Knox, PA 16232-0810 | Oil & Gas Operator | Dec 2015 |
| 7245 | D O Walker Inc | Stratford, OK 74872 | Oil Operator | Mar 2025 |
| 7246 | D Oil, Inc. | Victoria, KS 67671 | Oil Operator | Mar 2025 |
| 7247 | D Robertson Well 2 | | Gas Operator | Dec 2021 |
| 7248 | D S & W Well Ser | | Oil Operator | Nov 1996 |
| 7249 | D S & W Well Servicing, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 7250 | D T E Gas And Oil Co | | Gas Operator | May 2007 |
| 7251 | D T E Gas Company | | Oil & Gas Operator | Jun 1999 |
| 7252 | D U Investments | Salina, KS 67401 | Oil & Gas Operator | Dec 2009 |
| 7253 | D W Energy, LLC | Dunbar, WV 25064 | Oil & Gas Operator | Dec 2021 |
| 7254 | D&H-S-S Production Co.,Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Aug 2003 |
| 7255 | D&M Operating, L.L.C. | Corpus Chrsti, TX 78414 | Gas Operator | Jul 2025 |
| 7256 | D&S Oil & Gas Operators, Inc. | | Oil & Gas Operator | Dec 2020 |
| 7257 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Jul 2025 |
| 7258 | D'Amato, Giovanni C. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 7259 | D-B-K Operating Company | | Oil Operator | Jan 2006 |
| 7260 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 7261 | D-D Oil | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2018 |
| 7262 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Jul 2025 |
| 7263 | D-O-R Lease Service, Inc. | | Oil & Gas Operator | Mar 2009 |
| 7264 | D-Oil Incorporat | | Oil Operator | Aug 1990 |
| 7265 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 7266 | D-Ram Construction Co., Inc. | | Gas Operator | Dec 1990 |
| 7267 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 7268 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 7269 | D-T Development Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2002 |
| 7270 | D-Tec Well Production LLC | | Oil Operator | Dec 2024 |
| 7271 | D. A. Biglane Operating Co Et Al | | Oil Operator | Feb 2004 |
| 7272 | D. & D. Operating Account | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2009 |
| 7273 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 7274 | D. A. Biglane | | Oil & Gas Operator | Feb 1990 |
| 7275 | D. A. Milton | | Oil & Gas Operator | Dec 2016 |
| 7276 | D. A. Stark | | Oil Operator | Dec 1990 |
| 7277 | D. B. Braddock | | Oil & Gas Operator | Jan 1986 |
| 7278 | D. B. Braddock-Kisatchie Res. | | Oil & Gas Operator | Jan 1985 |
| 7279 | D. B. McClinton | | Oil & Gas Operator | Jun 1992 |
| 7280 | D. B. McConnell | | Oil & Gas Operator | Oct 1991 |
| 7281 | D. B. McConnell Et Al | | Oil & Gas Operator | Nov 1993 |
| 7282 | D. C. Bintliff | | Oil & Gas Operator | Mar 1987 |
| 7283 | D. C. Bintliff Et Al | | Oil & Gas Operator | Feb 1987 |
| 7284 | D. C. Bintliff-McCormick O&G | | Oil & Gas Operator | Oct 1983 |
| 7285 | D. C. Malcolm, Inc. | Charleston, WV 25301 | Oil & Gas Operator | Dec 2021 |
| 7286 | D. E. Craggs Inc. | | Gas Operator | Dec 1993 |
| 7287 | D. E. Exploration, Inc. | Wellsville, KS 66092 | Oil & Gas Operator | Mar 2025 |
| 7288 | D. G. Haney, Inc. | Charleston, WV 25338-3810 | Oil & Gas Operator | Dec 2021 |
| 7289 | D. G. Oil Co. | Dennis, TX 76439 | Oil & Gas Operator | Jul 2025 |
| 7290 | D. I. Dupree | | Oil & Gas Operator | Sep 2015 |
| 7291 | D. J. Fritz | | Oil & Gas Operator | Feb 1982 |
| 7292 | D. J. Hatfield | | Oil & Gas Operator | Dec 1994 |
| 7293 | D. J. Pickrell Operator | | Gas Operator | Dec 2012 |
| 7294 | D. J. Simmons & Co. Of La. | | Gas Operator | Nov 1996 |
| 7295 | D. Jackson Rentals LLC | Easton, KS 66020 | Oil Operator | Mar 2025 |
| 7296 | D. K. Boyd Oil & Gas Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1999 |
| 7297 | D. L. & Barbara W. Chiles | | Oil Operator | Jan 2025 |
| 7298 | D. L. Gish | | Oil Operator | Mar 1992 |
| 7299 | D. L. Gish Oil Partnership | | Oil Operator | Feb 1989 |
| 7300 | D. L. Gish Oil, Inc. | | Oil Operator | Jul 1998 |