| 8201 | Dime Box Oil Company | Austin, TX 78759 | Oil & Gas Operator | Mar 2008 |
| 8202 | Dimension Energy Co., L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 8203 | Dimes Energy GP Inc. | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 8204 | Dimick Production, LLC | Hamilton, KS 66853 | Oil Operator | Sep 2025 |
| 8205 | Dimmit County SWD, LLC | Carrizo SPGS, TX 78834 | Oil Operator | Feb 2026 |
| 8206 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Feb 2026 |
| 8207 | Dimock Petroleum | Dallas, TX 75205 | Oil Operator | Apr 2014 |
| 8208 | Dinero Oil Corporation | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Nov 1999 |
| 8209 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 8210 | Dino Operating LLC | Throckmorton, TX 76483 | Oil Operator | Feb 2026 |
| 8211 | Dinsmore C E | Enid, OK 73702 | Oil & Gas Operator | May 2009 |
| 8212 | Directional Drilling Systems, LLC | Greenwood VIllage, CO 80111 | Oil Operator | Dec 2019 |
| 8213 | Dirks Petroleum Company | Beeville, TX 78104 | Oil & Gas Operator | Feb 2026 |
| 8214 | Dirks, R. W. | Tuleta, TX 78162 | Oil & Gas Operator | May 1999 |
| 8215 | Dirks, R.W. Pet. Eng. Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Jul 1999 |
| 8216 | Dirnett, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Feb 2026 |
| 8217 | Dirty Devil LP | Eenglewood, CO 80111 | Oil & Gas Operator | Apr 1989 |
| 8218 | Discorbis Oil Company | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2019 |
| 8219 | Discover Resources | Norman, OK 73070 | Oil & Gas Operator | Jan 2011 |
| 8220 | Discover Resources LLC | Norman, OK 73072-2310 | Oil & Gas Operator | Oct 2025 |
| 8221 | Discovery Energy Corp. CC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2026 |
| 8222 | Discovery Energy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 8223 | Discovery Energy, LLC | | Oil Operator | Jan 2007 |
| 8224 | Discovery Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 8225 | Discovery Oil & Gas LLC | Canonsburg, PA 15317-9557 | Gas Operator | Dec 2024 |
| 8226 | Discovery Oil And Gas | Canonburg, PA 15317 | Oil & Gas Operator | Dec 2024 |
| 8227 | Discovery Oil LTD | Los Angeles, CA 90067 | Oil & Gas Operator | Jan 1993 |
| 8228 | Discovery Operat | | Gas Operator | Jul 1988 |
| 8229 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 8230 | Discovery Operating, LLC | | Oil & Gas Operator | Oct 2023 |
| 8231 | Discovery Petroleum, L.L.C. | Alice, TX 78333 | Oil & Gas Operator | Feb 2026 |
| 8232 | Discus Oil Corporation | | Oil & Gas Operator | Dec 2002 |
| 8233 | Ditta Exploration Co., Inc. | | Oil & Gas Operator | Feb 1990 |
| 8234 | Dittman, D. W. | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2007 |
| 8235 | Diversified Energy Investments | | Oil & Gas Operator | May 2009 |
| 8236 | Diversified Energy LLC | Parker, CO 80138 | Oil & Gas Operator | Dec 2025 |
| 8237 | Diversified Natural Res., Inc. | | Oil Operator | May 2000 |
| 8238 | Diversified Oil & Gas LLC | Jackson Center, PA 16133 | Oil & Gas Operator | Nov 2025 |
| 8239 | Diversified Operating Corp. | Golden, CO 80401 | Oil & Gas Operator | Oct 2012 |
| 8240 | Diversified Production LLC | Keithville, LA 71047 | Oil & Gas Operator | Feb 2026 |
| 8241 | Diversified Resources LLC | | Gas Operator | Oct 2025 |
| 8242 | Diversified Resources, Inc. | Jackson Center, PA 16133 | Oil & Gas Operator | Dec 2020 |
| 8243 | Diversified Southern Production LLC | | Oil & Gas Operator | Dec 2018 |
| 8244 | Diversity Petroleum, LP | Rockwall, TX 75087 | Oil & Gas Operator | Aug 2010 |
| 8245 | Divide Petroleum Co | | Oil & Gas Operator | May 2000 |
| 8246 | Divine'S Service & Repairs Inc | | Oil & Gas Operator | Mar 1997 |
| 8247 | Dixie Drilling Company, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Nov 2011 |
| 8248 | Dixie Lake Operating, LLC | Longview, TX 75606 | Gas Operator | Feb 2026 |
| 8249 | Dixie Natural Gas Co. | | Oil & Gas Operator | Dec 2002 |
| 8250 | Dixie Oil Company Inc | Moore, OK 73153 | Oil & Gas Operator | Nov 1994 |
| 8251 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 8252 | Dixie Oil, LLC | Hamilton, KS 66853 | Oil Operator | Aug 2025 |
| 8253 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 8254 | Dixie Petroleum Inc | Cashion, OK 73016 | Oil & Gas Operator | May 2001 |
| 8255 | Dixie Well Service, Inc. | | Oil & Gas Operator | Jul 1995 |
| 8256 | Dixon David | Okmulgee, OK 74447-2066 | Oil & Gas Operator | Oct 2025 |
| 8257 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 8258 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 8259 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Oct 2025 |
| 8260 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 8261 | Dixon Oil Compan | | Oil Operator | Apr 1994 |
| 8262 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 8263 | Dixon, Bucky | | Oil & Gas Operator | Aug 2016 |
| 8264 | Dixon, Margaret | Moline, KS 67353 | Oil Operator | Dec 2009 |
| 8265 | Dixon, Mike | Moline, KS 67353 | Oil Operator | Sep 2025 |
| 8266 | Dixon, N. D. | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 8267 | Dixon, Robin Francine | Moline, KS 67353 | Oil Operator | Sep 2025 |
| 8268 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Feb 2026 |
| 8269 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Feb 2026 |
| 8270 | DJ Resources Inc | Bowie, TX 76230 | Oil & Gas Operator | Nov 2017 |
| 8271 | DJD Drilling Corporation | Graham, TX 76450 | Oil Operator | Jan 2010 |
| 8272 | DJH Investments, Inc. | Houston, TX 77024 | Oil Operator | Feb 2026 |
| 8273 | DJH Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 8274 | DJM Beasley Well Service | Tuscola, TX 79562 | Oil Operator | Feb 2026 |
| 8275 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Nov 2025 |
| 8276 | DJR Well Services Inc | McDonald, OH 44437 | Oil & Gas Operator | Dec 2024 |
| 8277 | DJS Farms Inc. | Waterloo, NY 13165 | Gas Operator | Dec 2024 |
| 8278 | DJW Enterprises Inc | Buckhannon, WV 26201-9126 | Gas Operator | Dec 2024 |
| 8279 | DK Gas Inc | Hawthorn, PA 16230-0228 | Oil & Gas Operator | Dec 2006 |
| 8280 | DK Operating Inc. | Jetmore, KS 67854 | Oil Operator | Sep 2025 |
| 8281 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Dec 2025 |
| 8282 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 8283 | DKM Offshore Energy Inc. | | Oil & Gas Operator | Dec 1993 |
| 8284 | DKM Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2011 |
| 8285 | DKMR Oil Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2017 |
| 8286 | DKT Energy LLC | Edmond, OK 73083-6844 | Oil & Gas Operator | Sep 2014 |
| 8287 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Feb 2026 |
| 8288 | DL Energy, LLC | Saco, MT 59261 | Gas Operator | Nov 2025 |
| 8289 | DL Resources Inc | Ludlow, PA 16333-0039 | Oil & Gas Operator | Dec 2024 |
| 8290 | DLB Energy Corporation | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Dec 2014 |
| 8291 | DLB Oil & Gas, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Feb 2026 |
| 8292 | DLJ Investments, LLC | Springboro, OH 45006 | Oil Operator | Dec 2023 |
| 8293 | DLKB Operating LLC | Eufaula, OK 74432 | Gas Operator | Nov 2025 |
| 8294 | DLM Energy | Houston, TX 77058 | Oil & Gas Operator | Sep 1994 |
| 8295 | DLM Oil | | Oil Operator | Nov 2008 |
| 8296 | DLM Ventures | | Oil & Gas Operator | Dec 2004 |
| 8297 | DLM Ventures LLC | | Oil & Gas Operator | Dec 2004 |
| 8298 | DM Backhoe Service | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 8299 | DM Petroleum LLC | Duncan, OK 73533 | Oil Operator | Oct 2025 |
| 8300 | DMH Petroleum, Inc. | Sterling, KS 67579 | Oil Operator | Aug 2025 |