| 3501 | El Campo Operating, LLC | Dallas, TX 75206 | Oil & Gas Operator | Feb 2011 |
| 3502 | El Dorado Gas & Oil, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 3503 | El Dorado Resources Inc. | Waco, TX 76710 | Oil & Gas Operator | Oct 2009 |
| 3504 | El Mesteno Energy LLC | Three Rivers, TX 78071 | Oil Operator | Feb 2026 |
| 3505 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 3506 | El Paso E&P Zapata, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2010 |
| 3507 | El Paso Field Services Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 3508 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 3509 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 3510 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2026 |
| 3511 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2026 |
| 3512 | El Toro Resources LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2026 |
| 3513 | El Tres Exploration | Houston, TX 77098 | Oil & Gas Operator | Mar 2008 |
| 3514 | Elam, Jack G. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 3515 | Elam, Jack G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 3516 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 3517 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 3518 | Elco Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 3519 | Eldon Oil Co. | Three Rivers, TX 78071 | Oil & Gas Operator | Feb 2026 |
| 3520 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 3521 | Eldorado Operating Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2004 |
| 3522 | Eldred Prod And Consulting, LLC | Nocona, TX 76255 | Oil Operator | Feb 2026 |
| 3523 | Electragas, Inc. | Houston, TX 77064 | Oil Operator | Feb 2026 |
| 3524 | Element Petro Operating II, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2016 |
| 3525 | Element Petroleum Op III, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 3526 | Element Petroleum Operating IV, LLC | Midland, TX 79710 | Oil Operator | Feb 2026 |
| 3527 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 3528 | Elendil Resources LLC | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 3529 | Eleon Operators, LLC | Katy, TX 77494 | Oil & Gas Operator | Feb 2026 |
| 3530 | Elephant Oil & Gas, LLC | Dallas, TX 75204 | Oil & Gas Operator | Nov 2015 |
| 3531 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 3532 | Elfco, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jun 1996 |
| 3533 | Elison Oil & Gas, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Oct 1999 |
| 3534 | Elita, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2016 |
| 3535 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 3536 | Elk Energy Holdings LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 3537 | Elk Meadows Resources LLC | Houston, TX 77037 | Oil & Gas Operator | Jan 2021 |
| 3538 | Elk River Resources, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2023 |
| 3539 | Elkhorn Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 1995 |
| 3540 | Ellard Oil | Loving, TX 76460 | Oil & Gas Operator | May 2022 |
| 3541 | Ellard, Herman | Graham, TX 76450 | Oil & Gas Operator | Feb 2005 |
| 3542 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 3543 | Elliott Oil & Gas Operating Co. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2026 |
| 3544 | Elliott Oil Company, L.P. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2026 |
| 3545 | Ellis Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Feb 2026 |
| 3546 | Ellis, Amon | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 3547 | Ellison Lease Operating | Bridgeport, TX 76426 | Oil & Gas Operator | Feb 2026 |
| 3548 | Ellison, Dewitt, Jr. | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2016 |
| 3549 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 3550 | Ellora LLC | Boulder, CO 80308 | Oil & Gas Operator | Feb 2009 |
| 3551 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 3552 | Ellstrom Energy Company | Kingwood, TX 77339 | Oil & Gas Operator | Nov 2000 |
| 3553 | Ellsworth, H. P. O&G Properties | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Feb 2026 |
| 3554 | Elm Grove Production, LLC | Dallas, TX 75360 | Oil & Gas Operator | Feb 2026 |
| 3555 | Elms Oil Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 3556 | Elp Production Company LLC | Dallas, TX 75287 | Oil Operator | Feb 2026 |
| 3557 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 3558 | Eltex Energy Group, Inc. | Houston, TX 77055 | Gas Operator | Aug 2003 |
| 3559 | Em-Gee Oil Account | Jacksonville, TX 75766 | Oil & Gas Operator | Sep 1995 |
| 3560 | Embassy Energy, L.L.C. | Oklahoma City, OK 73112 | Gas Operator | Apr 2001 |
| 3561 | Embassy Oil Company | Highland VLG, TX 75077 | Oil & Gas Operator | Feb 2026 |
| 3562 | Embassy Well Service, LLC | Carrollton, TX 75011 | Oil & Gas Operator | Feb 2026 |
| 3563 | Embrey Oil Production Co. | Sutherlnd SPG, TX 78161 | Oil & Gas Operator | Oct 2021 |
| 3564 | Embry Solutions, Inc. | Dallas, TX 75315 | Oil Operator | Feb 2026 |
| 3565 | Emco Oil & Gas | Graham, TX 76450 | Oil & Gas Operator | Dec 1995 |
| 3566 | Emco Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2002 |
| 3567 | Emerald Bay Energy, Inc. | San Antonio, TX 78230 | Oil Operator | Feb 2026 |
| 3568 | Emerald Gather And Trans, LLC | Cypress, TX 77429 | Oil & Gas Operator | Feb 2026 |
| 3569 | Emerald Oil & Gas LC | Fort Worth, TX 76109 | Oil & Gas Operator | Feb 2026 |
| 3570 | Emerald Operating Company, Inc. | Plano, TX 75075 | Oil & Gas Operator | Jan 2013 |
| 3571 | Emerald Petroleum Corporation | Dallas, TX 75244 | Oil & Gas Operator | Apr 2002 |
| 3572 | Emerald Production Company | Midland, TX 79702 | Oil & Gas Operator | Jun 1995 |
| 3573 | Emerson Oil Company | Rindge, NH 03461 | Oil & Gas Operator | Feb 2008 |
| 3574 | Eminent Oil & Gas, Inc. | Houston, TX 77077 | Oil & Gas Operator | Feb 2026 |
| 3575 | Emlou Oil Co. | Atascosa, TX 78002 | Oil & Gas Operator | Jul 2011 |
| 3576 | Empire Exploration Corp. 1989 | Lebanon, MO 65536 | Oil & Gas Operator | Mar 2003 |
| 3577 | Empire Oil & Gas Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2017 |
| 3578 | Empire Oil Company | Coppell, TX 75019 | Oil & Gas Operator | Feb 2026 |
| 3579 | Empire Oil Of New Jersey | Post, TX 79356 | Oil & Gas Operator | Jan 1999 |
| 3580 | Empire Operating, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 3581 | Empire Texas Operating LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2026 |
| 3582 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 3583 | En Geo, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Feb 2026 |
| 3584 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 3585 | Enbridge G & P (East Texas) L.P. | Houston, TX 77056 | Oil & Gas Operator | Sep 2018 |
| 3586 | Enbridge Pipelines (Ne Texas) LP | Houston, TX 77002 | Oil & Gas Operator | Jan 2010 |
| 3587 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 3588 | Encina Resources, LLC | Houston, TX 77251 | Oil & Gas Operator | Feb 2026 |
| 3589 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Feb 2026 |
| 3590 | Encino Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 3591 | Enco Exploration Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2020 |
| 3592 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Feb 2026 |
| 3593 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 3594 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 3595 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 3596 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 3597 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 3598 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Feb 2026 |
| 3599 | Encrescent, LLC | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 3600 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |