| 3401 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 3402 | El Paso E&P Zapata, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2010 |
| 3403 | El Paso Field Services Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 3404 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 3405 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 3406 | El Ran, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Oct 2025 |
| 3407 | El Reno Energy, LLC | Granbury, TX 76048 | Oil & Gas Operator | Oct 2025 |
| 3408 | El Toro Resources LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 3409 | El Tres Exploration | Houston, TX 77098 | Oil & Gas Operator | Mar 2008 |
| 3410 | Elam, Jack G. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 3411 | Elam, Jack G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 3412 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 3413 | Elco Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2014 |
| 3414 | Elco Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 2025 |
| 3415 | Eldon Oil Co. | Three Rivers, TX 78071 | Oil & Gas Operator | Oct 2025 |
| 3416 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 3417 | Eldorado Operating Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2004 |
| 3418 | Eldred Prod And Consulting, LLC | Nocona, TX 76255 | Oil Operator | Oct 2025 |
| 3419 | Electragas, Inc. | Houston, TX 77064 | Oil Operator | Oct 2025 |
| 3420 | Element Petro Operating II, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2016 |
| 3421 | Element Petroleum Op III, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 3422 | Element Petroleum Operating IV, LLC | Midland, TX 79710 | Oil Operator | Oct 2025 |
| 3423 | Element Petroleum Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2015 |
| 3424 | Elendil Resources LLC | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 3425 | Eleon Operators, LLC | Katy, TX 77494 | Oil & Gas Operator | Oct 2025 |
| 3426 | Elephant Oil & Gas, LLC | Dallas, TX 75204 | Oil & Gas Operator | Nov 2015 |
| 3427 | Elevation Resources LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 3428 | Elfco, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jun 1996 |
| 3429 | Elison Oil & Gas, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Oct 1999 |
| 3430 | Elita, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Dec 2016 |
| 3431 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 3432 | Elk Energy Holdings LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 3433 | Elk Meadows Resources LLC | Houston, TX 77037 | Oil & Gas Operator | Jan 2021 |
| 3434 | Elk River Resources, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2023 |
| 3435 | Elkhorn Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 1995 |
| 3436 | Ellard Oil | Loving, TX 76460 | Oil & Gas Operator | May 2022 |
| 3437 | Ellard, Herman | Graham, TX 76450 | Oil & Gas Operator | Feb 2005 |
| 3438 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 3439 | Elliott Oil & Gas Operating Co. | Magnolia, TX 77354 | Oil & Gas Operator | Oct 2025 |
| 3440 | Elliott Oil Company, L.P. | Magnolia, TX 77354 | Oil & Gas Operator | Oct 2025 |
| 3441 | Ellis Exploration, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Oct 2025 |
| 3442 | Ellis, Amon | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 3443 | Ellison Lease Operating | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 3444 | Ellison, Dewitt, Jr. | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2016 |
| 3445 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 3446 | Ellora LLC | Boulder, CO 80308 | Oil & Gas Operator | Feb 2010 |
| 3447 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 3448 | Ellstrom Energy Company | Kingwood, TX 77339 | Oil & Gas Operator | Nov 2000 |
| 3449 | Ellsworth, H. P. O&G Properties | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 3450 | Elm Grove Production, LLC | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 3451 | Elms Oil Company | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 3452 | Elp Production Company LLC | Dallas, TX 75287 | Oil Operator | Oct 2025 |
| 3453 | Elson Oil Company | Tulsa, OK 74103-4429 | Oil & Gas Operator | Dec 2016 |
| 3454 | Em-Gee Oil Account | Jacksonville, TX 75766 | Oil & Gas Operator | Sep 1995 |
| 3455 | Embassy Energy, L.L.C. | Oklahoma City, OK 73112 | Gas Operator | Apr 2001 |
| 3456 | Embassy Oil Company | Highland VLG, TX 75077 | Oil & Gas Operator | Oct 2025 |
| 3457 | Embassy Well Service, LLC | Carrollton, TX 75011 | Oil & Gas Operator | Oct 2025 |
| 3458 | Embrey Oil Production Co. | Sutherlnd SPG, TX 78161 | Oil & Gas Operator | Oct 2021 |
| 3459 | Embry Solutions, Inc. | Dallas, TX 75315 | Oil Operator | Oct 2025 |
| 3460 | Emco Oil & Gas | Graham, TX 76450 | Oil & Gas Operator | Dec 1995 |
| 3461 | Emco Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2002 |
| 3462 | Emerald Bay Energy, Inc. | San Antonio, TX 78230 | Oil Operator | Oct 2025 |
| 3463 | Emerald Gather And Trans, LLC | Cypress, TX 77429 | Oil & Gas Operator | Oct 2025 |
| 3464 | Emerald Oil & Gas LC | Fort Worth, TX 76109 | Oil & Gas Operator | Oct 2025 |
| 3465 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2025 |
| 3466 | Emerald Petroleum Corporation | Dallas, TX 75244 | Oil & Gas Operator | Apr 2002 |
| 3467 | Emerald Production Company | Midland, TX 79702 | Oil & Gas Operator | Jun 1995 |
| 3468 | Emerson Oil Company | Rindge, NH 03461 | Oil & Gas Operator | Feb 2008 |
| 3469 | Eminent Oil & Gas, Inc. | Houston, TX 77077 | Oil & Gas Operator | Oct 2025 |
| 3470 | Emlou Oil Co. | Atascosa, TX 78002 | Oil & Gas Operator | Jul 2011 |
| 3471 | Empire Exploration Corp. 1989 | Lebanon, MO 65536 | Oil & Gas Operator | Mar 2003 |
| 3472 | Empire Oil & Gas Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2017 |
| 3473 | Empire Oil Company | Coppell, TX 75019 | Oil & Gas Operator | Oct 2025 |
| 3474 | Empire Oil Of New Jersey | Post, TX 79356 | Oil & Gas Operator | Jan 1999 |
| 3475 | Empire Operating, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 3476 | Empire Texas Operating LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 3477 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 3478 | En Geo, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Oct 2025 |
| 3479 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 3480 | Enbridge G & P (East Texas) L.P. | Houston, TX 77056 | Oil & Gas Operator | Sep 2018 |
| 3481 | Enbridge Pipelines (Ne Texas) LP | Houston, TX 77002 | Oil & Gas Operator | Jan 2010 |
| 3482 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 3483 | Encina Resources, LLC | Houston, TX 77251 | Oil & Gas Operator | Oct 2025 |
| 3484 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |
| 3485 | Encino Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 3486 | Enco Exploration Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2020 |
| 3487 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Oct 2025 |
| 3488 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 3489 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 3490 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 3491 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 3492 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | May 2025 |
| 3493 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Oct 2025 |
| 3494 | Encrescent, LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 3495 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 3496 | Endeavor Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2015 |
| 3497 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 3498 | Endeavor Production Company | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 3499 | Enderli Oil Company, Inc | Highlands, TX 77562 | Oil & Gas Operator | Aug 2003 |
| 3500 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Oct 2025 |