| 3501 | Enerdril Corporation | Moran, TX 76464 | Gas Operator | Dec 2015 |
| 3502 | Enerex Supply, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Nov 1993 |
| 3503 | Enerfin Field Services LLC | Houston, TX 77077 | Oil Operator | Nov 2024 |
| 3504 | Enerfin Resources II-92 L.P. | Houston, TX 77077 | Oil & Gas Operator | Jul 2025 |
| 3505 | Energen Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Jan 2021 |
| 3506 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 3507 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 3508 | Energex Corp | Springfield, MO 65807 | Oil & Gas Operator | Apr 2025 |
| 3509 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 3510 | Energon Oil & Gas Inc. | Odessa, TX 79762 | Oil & Gas Operator | Aug 2003 |
| 3511 | Energon Oil, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Jul 2025 |
| 3512 | Energon3 | Rowlett, TX 75089 | Oil Operator | Jul 2025 |
| 3513 | Energy & Expl. PRTNRS Oper., LP | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2016 |
| 3514 | Energy + Savings, L.L.C. | Alamo, TX 78516 | Oil & Gas Operator | Jan 2008 |
| 3515 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | Jul 2025 |
| 3516 | Energy Acquisitions, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 1996 |
| 3517 | Energy Corporation Of America | Charleston, WV 25311 | Oil & Gas Operator | Dec 2023 |
| 3518 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 3519 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | May 2025 |
| 3520 | Energy From Texas, L. P. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2013 |
| 3521 | Energy Frontiers Partners, LP | Grapevine, TX 76051 | Oil Operator | May 2008 |
| 3522 | Energy Group Of America, Inc. | Hollister, MO 65672 | Oil Operator | Jul 2025 |
| 3523 | Energy Hunter Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Feb 2019 |
| 3524 | Energy Management Company | Kilgore, TX 75663 | Oil Operator | Apr 2020 |
| 3525 | Energy Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 3526 | Energy Onramp LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 3527 | Energy Partners, LTD. | New Orleans, LA 70170 | Oil & Gas Operator | Aug 2012 |
| 3528 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 3529 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 3530 | Energy Reserves Group LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 3531 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 3532 | Energy Resource Management, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 3533 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 3534 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 3535 | Energy Service Investment Corp. | Tulsa, OK 74137 | Oil & Gas Operator | May 2006 |
| 3536 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Mar 2025 |
| 3537 | Energy Transfer Fuel, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 3538 | Energy Well Service, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2004 |
| 3539 | Energypro, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Jul 2025 |
| 3540 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2025 |
| 3541 | Energyquest Management, LLC | Houston, TX 77090 | Oil & Gas Operator | Apr 2021 |
| 3542 | Enerquest Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 3543 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 3544 | Enerquest Operating, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 3545 | Enerquest Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 3546 | Enerstar Resources, L.C. | Midland, TX 79701 | Oil & Gas Operator | Apr 1999 |
| 3547 | Enertex, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 1995 |
| 3548 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 3549 | Enex Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2009 |
| 3550 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 3551 | Enfield Operating Company, LLC | Coppell, TX 75019 | Oil Operator | Jul 2025 |
| 3552 | Eng, George E. | Midland, TX 79701 | Oil & Gas Operator | Dec 2011 |
| 3553 | Engas Corporation | Jacksboro, TX 76458 | Oil & Gas Operator | May 2008 |
| 3554 | Engas XP, LLC | Wimberley, TX 78676 | Oil & Gas Operator | Jul 2025 |
| 3555 | Engelke, R. H. | San Antonio, TX 78230 | Oil & Gas Operator | Jul 2025 |
| 3556 | Engelke, Randall Glen | Luling, TX 78648 | Oil & Gas Operator | Jul 2007 |
| 3557 | Engroup Resources, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 3558 | Enhanced Energy Partners Corp | Tomball, TX 77377 | Oil & Gas Operator | Jul 2025 |
| 3559 | Enhanced RS, Inc. | Luling, TX 78648 | Oil Operator | Jul 2025 |
| 3560 | Enid Operating, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jul 2025 |
| 3561 | Enline Operating, L.L.C. | Houston, TX 77019 | Oil & Gas Operator | Jun 1998 |
| 3562 | Enline Resources, LLC | Houston, TX 77254 | Oil & Gas Operator | Feb 1996 |
| 3563 | Enlo Energy Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 3564 | Enloe Oil Company | Olney, TX 76374 | Oil & Gas Operator | Jun 2000 |
| 3565 | Enmark Gas Gathering L. P. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2025 |
| 3566 | Enpower Resources Inc. | Sugar Land, TX 77479 | Oil & Gas Operator | Jul 2025 |
| 3567 | Enr Operating, LLC | Eunice, NM 88231 | Oil & Gas Operator | Jul 2025 |
| 3568 | Enre Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2005 |
| 3569 | Enre LP | Kingwood, TX 77339 | Oil & Gas Operator | Feb 2004 |
| 3570 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2025 |
| 3571 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 3572 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 3573 | Enserch Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 1998 |
| 3574 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 3575 | Ensight III Energy MGMT, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2008 |
| 3576 | Ensight IV Energy Management,LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 3577 | Ensight Resources, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2001 |
| 3578 | Ensign Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Jan 2004 |
| 3579 | Ensign Operating LLC | Houston, TX 77086 | Oil & Gas Operator | Feb 2023 |
| 3580 | Enstar Energy, Inc. | Arlington, TX 76003 | Oil & Gas Operator | Jul 2025 |
| 3581 | Enterra Resources, LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2025 |
| 3582 | Enwest Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Aug 1994 |
| 3583 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 3584 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 3585 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 3586 | EP Energy E&P Company, LLC | Houston, TX 77210 | Oil & Gas Operator | Apr 2025 |
| 3587 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 3588 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 3589 | Epic Permian Operating, LLC | Arvada, CO 80006 | Oil & Gas Operator | Jan 2025 |
| 3590 | Epstein, Edwin A Jr Oper Co Inc | Las Vegas, NV 89128 | Gas Operator | Dec 2001 |
| 3591 | Eqt Production Texas, LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Jun 2018 |
| 3592 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jul 2025 |
| 3593 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2025 |
| 3594 | Erebor Resources, LLC | Tyler, TX 75702 | Oil & Gas Operator | Oct 2019 |
| 3595 | Erg Operating Company Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2006 |
| 3596 | Erg Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2015 |
| 3597 | Ergon Energy Partners, L.P. | Monroe, LA 71207 | Oil & Gas Operator | Apr 2024 |
| 3598 | Ericksen, W.R. | Hobbs, NM 88240 | Oil & Gas Operator | Nov 1993 |
| 3599 | Erin Oil Co. | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 3600 | Erin Oil Exploration, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1996 |