| 301 | Delta Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 302 | Dennis Langlitz | Carlsbad, NM 88220 | Oil Operator | Jul 2009 |
| 303 | Denveramerican Petroleum, A LTD Liability Co | Denver, CO 80203 | Oil & Gas Operator | Sep 1997 |
| 304 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
| 305 | Devon Energy Operating Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2013 |
| 306 | Devon Energy Production Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2015 |
| 307 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 308 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 309 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 310 | DGP Energy, LLC | Wilmington, DE 19801 | Oil & Gas Operator | Feb 2024 |
| 311 | Diamond S Energy Company | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2024 |
| 312 | Diamondback Resources LLC | Midland, TX 79705 | Oil & Gas Operator | May 2018 |
| 313 | Dickson Petroleum | Midland, TX 79710 | Oil & Gas Operator | Nov 1998 |
| 314 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 315 | Discovery Operating Inc | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 316 | DJR Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Feb 2024 |
| 317 | DKD Production, LLC | Tatum, NM 88267 | Oil Operator | Feb 2024 |
| 318 | DKD,LLC | Tatum, NM 88267 | Oil & Gas Operator | Oct 2022 |
| 319 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 320 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 321 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 322 | Dominion Production Company, LLC | Tampa, FL 33606 | Oil & Gas Operator | Apr 2024 |
| 323 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 324 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 325 | Dorothy Boyce | Artesia, NM 88210 | Oil & Gas Operator | Sep 2000 |
| 326 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Apr 2024 |
| 327 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 328 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 329 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 330 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 331 | Driftwood Oil, LLC | Jal, NM 88252 | Oil & Gas Operator | Feb 2024 |
| 332 | Drum Energy Corp | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 333 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2024 |
| 334 | Duke Oil & Gas Inc | Colorado City, TX 79512 | Oil & Gas Operator | May 2003 |
| 335 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 336 | Dwight A Tipton | Lovington, NM 88260 | Oil & Gas Operator | Aug 2023 |
| 337 | Dwight Tipton Et Al | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2002 |
| 338 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 339 | E G Operating Co | Austin, TX 78746 | Oil & Gas Operator | Jun 1997 |
| 340 | E L Fundingsland | Littleton, CO 80160 | Oil & Gas Operator | Jun 2016 |
| 341 | E.G.L. Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jan 2024 |
| 342 | Eagle Resources LP Dba Ted Hoskinson | Roswell, NM 882023900 | Oil & Gas Operator | Dec 2008 |
| 343 | Eagle Rock Operating Company,LLC | Houston, TX 77252 | Oil & Gas Operator | Oct 2015 |
| 344 | Earnest Producing Corporation | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 345 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 346 | Eastland Oil Company, The | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 347 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 348 | Eclipse Oil & Gas, Inc. | Midland, TX 79703 | Oil & Gas Operator | Apr 2024 |
| 349 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 350 | Edmar Company, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 351 | Edwards Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 352 | El Pamco Inc | Albuquerque, NM 87191 | Gas Operator | Mar 2020 |
| 353 | El Paso Gas Marketing | Unknown, NM 99999 | Oil & Gas Operator | Feb 1997 |
| 354 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
| 355 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 356 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Jan 2024 |
| 357 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 358 | Elk Oil Company | Overland Park, KS 66212 | Oil & Gas Operator | Sep 2007 |
| 359 | Elk San Juan, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2014 |
| 360 | Elliott Oil Co | Roswell, NM 88202 | Oil & Gas Operator | Nov 2001 |
| 361 | Elm Ridge Exploration Company LLC | Bloomfield, NM 87413 | Oil & Gas Operator | Nov 2017 |
| 362 | Emkey Companies, LLC | Dallas, TX 75251 | Oil & Gas Operator | May 2016 |
| 363 | Empire New Mexico LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2024 |
| 364 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 365 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Jan 2024 |
| 366 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 367 | Endura Energy LLC | Lubbock, TX 79464 | Oil & Gas Operator | Feb 2024 |
| 368 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 369 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Jan 2024 |
| 370 | Enerdyne, LLC | Albuquerque, NM 87123 | Oil & Gas Operator | Feb 2024 |
| 371 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 372 | Energex, LLC | Scottsdale, AZ 85255 | Oil & Gas Operator | Feb 2024 |
| 373 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2023 |
| 374 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 375 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2023 |
| 376 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 377 | Enerstar Resources LTD Co. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 378 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 379 | Enervest San Juan Operating LLC | Durango, CO 81301 | Gas Operator | Jul 2001 |
| 380 | Engineering & Production Service, Inc. | Farmington, NM 87499 | Oil & Gas Operator | Mar 2024 |
| 381 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 382 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 383 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 384 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 385 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 386 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 387 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |
| 388 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 389 | Epic Energy LLC | Aztec, NM 87410 | Oil & Gas Operator | Jan 2024 |
| 390 | Ernie L Hegwer Ind | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2002 |
| 391 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Apr 2024 |
| 392 | Ers Resources, LLC | Irving, TX 75038 | Oil Operator | Sep 2010 |
| 393 | Erwin Oil & Gas LTD Co | Hobbs, NM 882411506 | Oil & Gas Operator | Apr 2003 |
| 394 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 395 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 396 | Etl Hydrocarbons, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 397 | Euratex Corp | Glade Park, CO 81523 | Oil & Gas Operator | Sep 1996 |
| 398 | Evans Oil Company Inc | Eunice, NM 88231 | Oil & Gas Operator | Feb 2007 |
| 399 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 400 | Everquest Energy Corporation | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2024 |