| 3501 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Feb 2025 |
| 3502 | Emerald Petroleum Corporation | Dallas, TX 75244 | Oil & Gas Operator | Apr 2002 |
| 3503 | Emerald Production Company | Midland, TX 79702 | Oil & Gas Operator | Jun 1995 |
| 3504 | Emerson Oil Company | Rindge, NH 03461 | Oil & Gas Operator | Feb 2008 |
| 3505 | Eminent Oil & Gas, Inc. | Houston, TX 77077 | Oil & Gas Operator | Apr 2025 |
| 3506 | Emlou Oil Co. | Atascosa, TX 78002 | Oil & Gas Operator | Jul 2011 |
| 3507 | Empire Exploration Corp. 1989 | Lebanon, MO 65536 | Oil & Gas Operator | Mar 2003 |
| 3508 | Empire Oil & Gas Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2017 |
| 3509 | Empire Oil Company | Coppell, TX 75019 | Oil & Gas Operator | Apr 2025 |
| 3510 | Empire Oil Of New Jersey | Post, TX 79356 | Oil & Gas Operator | Jan 1999 |
| 3511 | Empire Operating, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 3512 | Empire Texas Operating LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2025 |
| 3513 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 3514 | En Geo, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Apr 2025 |
| 3515 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 3516 | Enbridge G & P (East Texas) L.P. | Houston, TX 77056 | Oil & Gas Operator | Sep 2018 |
| 3517 | Enbridge Pipelines (Ne Texas) LP | Houston, TX 77002 | Oil & Gas Operator | Jan 2010 |
| 3518 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 3519 | Encina Resources, LLC | Houston, TX 77251 | Oil & Gas Operator | Apr 2025 |
| 3520 | Encino Exploration, Inc. | George West, TX 78022 | Oil & Gas Operator | Apr 2025 |
| 3521 | Encino Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 3522 | Enco Exploration Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2020 |
| 3523 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Apr 2025 |
| 3524 | Encon Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 3525 | Encore Energy Partners Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2015 |
| 3526 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 3527 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2024 |
| 3528 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 3529 | Encore Permian Operating, LLC | Uvalde, TX 78801 | Oil & Gas Operator | Apr 2025 |
| 3530 | Encrescent, LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2025 |
| 3531 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 3532 | Endeavor Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2015 |
| 3533 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 3534 | Endeavor Production Company | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 3535 | Enderli Oil Company, Inc | Highlands, TX 77562 | Oil & Gas Operator | Aug 2003 |
| 3536 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Apr 2025 |
| 3537 | Endurance Resources III Operating , LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 3538 | Endurance Resources LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2017 |
| 3539 | Enduring Resources, LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Feb 2025 |
| 3540 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 3541 | Enercap Corporation | Kingwood, TX 77325 | Oil & Gas Operator | Aug 2003 |
| 3542 | Enercorp Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 1993 |
| 3543 | Enerdril Corporation | Moran, TX 76464 | Gas Operator | Dec 2015 |
| 3544 | Enerex Supply, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 1993 |
| 3545 | Enerfin Field Services LLC | Houston, TX 77077 | Oil Operator | Nov 2024 |
| 3546 | Enerfin Resources II-92 L.P. | Houston, TX 77077 | Oil & Gas Operator | Apr 2025 |
| 3547 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 3548 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 3549 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 3550 | Energex Corp | Springfield, MO 65807 | Oil & Gas Operator | Jan 2025 |
| 3551 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 3552 | Energon Oil & Gas Inc. | Odessa, TX 79762 | Oil & Gas Operator | Aug 2003 |
| 3553 | Energon Oil, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2025 |
| 3554 | Energon3 | Rowlett, TX 75089 | Oil Operator | Apr 2025 |
| 3555 | Energy & Expl. PRTNRS Oper., LP | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2016 |
| 3556 | Energy + Savings, L.L.C. | Alamo, TX 78516 | Oil & Gas Operator | Jan 2008 |
| 3557 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | Apr 2025 |
| 3558 | Energy Acquisitions, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 1996 |
| 3559 | Energy Corporation Of America | Charleston, WV 25311 | Oil & Gas Operator | Dec 2023 |
| 3560 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 3561 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Feb 2025 |
| 3562 | Energy From Texas, L. P. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2013 |
| 3563 | Energy Frontiers Partners, LP | Grapevine, TX 76051 | Oil Operator | May 2008 |
| 3564 | Energy Group Of America, Inc. | Hollister, MO 65672 | Oil Operator | Apr 2025 |
| 3565 | Energy Hunter Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2019 |
| 3566 | Energy Management Company | Kilgore, TX 75663 | Oil Operator | Apr 2020 |
| 3567 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 3568 | Energy Onramp LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 3569 | Energy Partners, LTD. | New Orleans, LA 70170 | Oil & Gas Operator | Aug 2012 |
| 3570 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3571 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 3572 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 3573 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 3574 | Energy Resource Management, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 3575 | Energy Resource Recovery Corp | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3576 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 3577 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 3578 | Energy Service Investment Corp. | Tulsa, OK 74137 | Oil & Gas Operator | May 2006 |
| 3579 | Energy Transfer Crude Marketing LLC | Houston, TX 77002 | Oil Operator | Jan 2025 |
| 3580 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 3581 | Energy Well Service, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2004 |
| 3582 | Energypro, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Apr 2025 |
| 3583 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2025 |
| 3584 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 3585 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3586 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 3587 | Enerquest Operating, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 3588 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 3589 | Enerstar Resources, L.C. | Midland, TX 79701 | Oil & Gas Operator | Apr 1999 |
| 3590 | Enertex, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 3591 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 3592 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 3593 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 3594 | Enfield Operating Company, LLC | Coppell, TX 75019 | Oil Operator | Apr 2025 |
| 3595 | Eng, George E. | Midland, TX 79701 | Oil & Gas Operator | Dec 2011 |
| 3596 | Engas Corporation | Jacksboro, TX 76458 | Oil & Gas Operator | May 2008 |
| 3597 | Engas XP, LLC | Wimberley, TX 78676 | Oil & Gas Operator | Apr 2025 |
| 3598 | Engelke, R. H. | San Antonio, TX 78230 | Oil & Gas Operator | Apr 2025 |
| 3599 | Engelke, Randall Glen | Luling, TX 78648 | Oil & Gas Operator | Jul 2007 |
| 3600 | Engroup Resources, L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |