| 301 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Apr 2025 |
| 302 | D. K. Boyd Oil & Gas Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1999 |
| 303 | D.W.R. Oil Properties, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2025 |
| 304 | Dabb Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Aug 2020 |
| 305 | Dakota Resources, Inc | Midland, TX 79707 | Oil & Gas Operator | Jan 2025 |
| 306 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 307 | Dallas Production | Dallas, TX 75206 | Oil & Gas Operator | Sep 1996 |
| 308 | Dan C Berry | Eunice, NM 88231 | Oil Operator | Oct 1995 |
| 309 | Dan Strong Jr | Midland, TX 79702 | Oil & Gas Operator | Mar 1994 |
| 310 | Danny R Watson | Tatum, NM 88267 | Oil & Gas Operator | Nov 1997 |
| 311 | Danny R Watson Operating | Tatum, NM 88267 | Oil & Gas Operator | Nov 1997 |
| 312 | Davcro Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2003 |
| 313 | Dave M Thomas Jr | Farmington, NM 87499 | Oil & Gas Operator | Aug 1995 |
| 314 | David G Hammond | Artesia, NM 88211 | Oil Operator | May 2013 |
| 315 | David H Arrington Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 316 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 317 | Dennis Langlitz | Carlsbad, NM 88220 | Oil Operator | Jul 2009 |
| 318 | Denveramerican Petroleum, A LTD Liability Co | Denver, CO 80203 | Oil & Gas Operator | Sep 1997 |
| 319 | Desert Mountain Energy Corp. | Carson, NV 89701 | Gas Operator | Feb 2025 |
| 320 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 321 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 322 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 323 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 324 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 325 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 326 | DGP Energy, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Feb 2025 |
| 327 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2025 |
| 328 | Diamondback Resources LLC | Midland, TX 79705 | Oil & Gas Operator | May 2018 |
| 329 | Dickson Petroleum | Midland, TX 79710 | Oil & Gas Operator | Nov 1998 |
| 330 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 331 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 332 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Feb 2025 |
| 333 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Mar 2025 |
| 334 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 335 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 336 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 337 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 338 | Dominion Production Company, LLC | Tampa, FL 33606 | Oil & Gas Operator | Apr 2025 |
| 339 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 340 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 341 | Dorothy Boyce | Artesia, NM 88210 | Oil & Gas Operator | Sep 2000 |
| 342 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Apr 2025 |
| 343 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 344 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 345 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 346 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 347 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Feb 2025 |
| 348 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 349 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2025 |
| 350 | Duke Oil & Gas Inc | Colorado City, TX 79512 | Oil & Gas Operator | May 2003 |
| 351 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 352 | Dwight A Tipton | Lovington, NM 88260 | Oil & Gas Operator | Mar 2025 |
| 353 | Dwight Tipton Et Al | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2002 |
| 354 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 355 | E G Operating Co | Austin, TX 78746 | Oil & Gas Operator | Jun 1997 |
| 356 | E L Fundingsland | Littleton, CO 80160 | Oil & Gas Operator | Jun 2016 |
| 357 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 358 | Eagle Resources LP Dba Ted Hoskinson | Roswell, NM 882023900 | Oil & Gas Operator | Dec 2008 |
| 359 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 360 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Apr 2025 |
| 361 | Earnest R Smith SR | Kingsburg, CA 93631 | Gas Operator | Jul 2006 |
| 362 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2025 |
| 363 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 364 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 365 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Apr 2025 |
| 366 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 367 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 368 | Edwards Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 369 | El Pamco Inc | Albuquerque, NM 87191 | Gas Operator | Mar 2020 |
| 370 | El Paso Gas Marketing | Unknown, NM 99999 | Oil & Gas Operator | Feb 1997 |
| 371 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Apr 2025 |
| 372 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2025 |
| 373 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2025 |
| 374 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 375 | Elh Energy LLC | Lubbock, TX 79464 | Oil & Gas Operator | Feb 2025 |
| 376 | Elk Oil Company | Overland Park, KS 66212 | Oil & Gas Operator | Sep 2007 |
| 377 | Elk San Juan, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2014 |
| 378 | Elliott A Riggs | Farmington, NM 87499 | Gas Operator | Oct 2012 |
| 379 | Elliott Oil Co | Roswell, NM 88202 | Oil & Gas Operator | Nov 2001 |
| 380 | Elm Ridge Exploration Company LLC | Bloomfield, NM 87413 | Oil & Gas Operator | Nov 2017 |
| 381 | Emerald Gas Operating Co | Durango, CO 81301 | Gas Operator | Aug 1996 |
| 382 | Emkey Companies, LLC | Dallas, TX 75251 | Oil & Gas Operator | May 2016 |
| 383 | Empire New Mexico LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2025 |
| 384 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 385 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 386 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 387 | Endura Energy LLC | Lubbock, TX 79464 | Oil & Gas Operator | Jan 2025 |
| 388 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 389 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Feb 2025 |
| 390 | Enerdyne, LLC | Albuquerque, NM 87123 | Oil & Gas Operator | Jan 2025 |
| 391 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 392 | Energex, LLC | Scottsdale, AZ 85255 | Oil & Gas Operator | Sep 2024 |
| 393 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 394 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 395 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2025 |
| 396 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 397 | Enerstar Resources LTD Co. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 398 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 399 | Enervest San Juan Operating LLC | Durango, CO 81301 | Gas Operator | Jul 2001 |
| 400 | Engineering & Production Service, Inc. | Farmington, NM 87499 | Oil & Gas Operator | Feb 2025 |