| 401 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2025 |
| 402 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 403 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 404 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 405 | Enerstar Resources LTD Co. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 406 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2026 |
| 407 | Enervest San Juan Operating LLC | Durango, CO 81301 | Gas Operator | Jul 2001 |
| 408 | Engineering & Production Service, Inc. | Farmington, NM 87499 | Oil & Gas Operator | Feb 2026 |
| 409 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 410 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 411 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 412 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 413 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 414 | EOG Y Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 415 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2026 |
| 416 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 417 | Epic Energy, L.L.C. | Aztec, NM 87410 | Oil & Gas Operator | Jan 2026 |
| 418 | Ernie L Hegwer Ind | Hobbs, NM 88240 | Oil & Gas Operator | Sep 2002 |
| 419 | Ernmar Investments, Inc. | Edmond, OK 73083 | Oil & Gas Operator | Mar 2026 |
| 420 | Ers Resources, LLC | Irving, TX 75038 | Oil Operator | Sep 2010 |
| 421 | Erwin Oil & Gas LTD Co | Hobbs, NM 882411506 | Oil & Gas Operator | Apr 2003 |
| 422 | Estoril Producing Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |
| 423 | Etc Oil Co. | Pecos, TX 79772 | Oil & Gas Operator | Mar 2004 |
| 424 | Etl Hydrocarbons, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2026 |
| 425 | Eunice Well Service Inc | Eunice, NM 88231 | Oil & Gas Operator | Jan 2000 |
| 426 | Euratex Corp | Glade Park, CO 81523 | Oil & Gas Operator | Sep 1996 |
| 427 | Evans Oil Company Inc | Eunice, NM 88231 | Oil & Gas Operator | Feb 2007 |
| 428 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 429 | Everquest Energy Corporation | Fredericksbrg, TX 78624 | Oil & Gas Operator | Sep 2025 |
| 430 | Ew Operating (NM), LLC | Fayetteville, AR 72703 | Oil & Gas Operator | Jan 2026 |
| 431 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 432 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Mar 2026 |
| 433 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Mar 2026 |
| 434 | F & M Oil & Gas Co | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 435 | Fae II Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Jan 2026 |
| 436 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Mar 2026 |
| 437 | Fairway Resources Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Aug 2022 |
| 438 | Faith Trading, LLC | Lovington, NM 88260 | Oil Operator | Jan 2026 |
| 439 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 440 | Falcon Engineering Company, Inc. | Big Rapids, MI 493070818 | Oil & Gas Operator | Jul 2001 |
| 441 | Falcon Seaboard Oil & Gas LP | Farmington, NM 87499 | Gas Operator | May 1998 |
| 442 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 443 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Mar 2026 |
| 444 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Mar 2026 |
| 445 | Fe-NM, LLC | Tyler, TX 75711 | Oil & Gas Operator | Jan 2026 |
| 446 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 447 | Fina Oil & Chemical | Midland, TX 797022455 | Oil & Gas Operator | Apr 1999 |
| 448 | Finaly Resources LLC | Sunset Beach, CA 90742 | Oil & Gas Operator | Mar 2026 |
| 449 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Mar 2026 |
| 450 | Firewater, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Dec 2011 |
| 451 | Five State Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Oct 1995 |
| 452 | Five States Operating Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2008 |
| 453 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Mar 2026 |
| 454 | Flat Creek Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2026 |
| 455 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Mar 2026 |
| 456 | Flint Oak Energy, LLC | Montgomery, TX 77356 | Oil & Gas Operator | Mar 2026 |
| 457 | Floyd Oil Company | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 458 | Floyd Operating Company | Houston, TX 77002 | Oil & Gas Operator | Jul 2004 |
| 459 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 460 | Ford Chapman & Assoc | Midland, TX 79710 | Oil Operator | Sep 2000 |
| 461 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 462 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 463 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 464 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 465 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Mar 2026 |
| 466 | Forty Acres Energy, LLC | Houston, TX 77079173 | Oil & Gas Operator | Jan 2026 |
| 467 | Fossil Fuel Inc | Dallas, TX BAD ADDR | Oil & Gas Operator | Dec 1998 |
| 468 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Mar 2026 |
| 469 | Four Corners Exploration Co | Farmington, NM 87499 | Oil & Gas Operator | Dec 2025 |
| 470 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 471 | Four Starr Energy, Inc. | Dallas, TX 75243 | Gas Operator | May 2016 |
| 472 | Four Starr Production, LLC | Dallas, TX 75243 | Oil & Gas Operator | Mar 2026 |
| 473 | Fred F Pool, III | Roswell, NM 88202 | Oil & Gas Operator | Mar 2007 |
| 474 | Fred Pool DRLG Inc | Roswell, NM 88202 | Oil & Gas Operator | Dec 1999 |
| 475 | Freedom Energy Inc | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Mar 2026 |
| 476 | Freedom Energy LLC | Lake Arthur, NM 88253 | Oil & Gas Operator | Jun 2024 |
| 477 | Frisco Energy, L.L.C. | Tulsa, OK 74105 | Oil & Gas Operator | Dec 2025 |
| 478 | Frostman Oil Corp | Hope, NM 882501567 | Oil & Gas Operator | Mar 2008 |
| 479 | Fuel Products, Inc. | Midland, TX 79702 | Oil Operator | Mar 2002 |
| 480 | Fulfer Oil & Cattle LLC | Jal, NM 88252 | Oil & Gas Operator | Jan 2026 |
| 481 | Fuller Petroleum Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 482 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 483 | G & G Oil And Gas, LLC | Hobbs, NM 88240 | Oil & Gas Operator | Jul 2021 |
| 484 | G And C Operating, LLC | Artesia, NM 88211 | Oil & Gas Operator | Jan 2026 |
| 485 | G P II Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2020 |
| 486 | Gandy Corp | Lovington, NM 88267 | Oil & Gas Operator | Sep 2008 |
| 487 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 488 | Gary-Williams Co (The) | Denver, CO 80202 | Oil Operator | Nov 2009 |
| 489 | Gecko Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2006 |
| 490 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 491 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 492 | General New Mexico Inc. | Artesia, NM 882110385 | Oil Operator | Apr 1998 |
| 493 | George H Fentress | Wheatridge, CO 80034 | Gas Operator | Jun 1999 |
| 494 | Germany Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Oct 2002 |
| 495 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 496 | Gerry Thames | Tulsa, OK 74107 | Gas Operator | Mar 2008 |
| 497 | Giant Exploration & Prod Co | Farmington, NM 87499 | Oil & Gas Operator | Dec 2009 |
| 498 | Giant Operating LLC | Dallas, TX 75202 | Oil Operator | Dec 2013 |
| 499 | Gilbert Bates | Midland, TX 79708 | Gas Operator | Jan 2010 |
| 500 | Gillespie Oil Inc | Midland, TX 79701 | Oil & Gas Operator | Feb 2001 |