| 9501 | Ensign Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Jan 2004 |
| 9502 | Ensign Operating LLC | Houston, TX 77086 | Oil & Gas Operator | Feb 2023 |
| 9503 | Ensminger D & J | | Oil Operator | Dec 1994 |
| 9504 | Ensminger Energy LLC | Moran, KS 66755 | Oil Operator | Sep 2025 |
| 9505 | Ensminger Oil, LLC | Moran, KS 66755 | Oil Operator | Sep 2025 |
| 9506 | Ensminger, Donald & Jack, A General Partnership | Moran, KS 66755 | Oil Operator | Jun 2005 |
| 9507 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 9508 | Enstar Corporation | Houston, TX 77252 | Oil & Gas Operator | Apr 1988 |
| 9509 | Enstar Energy, Inc. | Arlington, TX 76003 | Oil & Gas Operator | Mar 2026 |
| 9510 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 9511 | Enstar Petroleum, Inc. | | Oil & Gas Operator | Jan 1984 |
| 9512 | Enstor Katy Storage & Transp LP | Houston, TX 77042 | Oil & Gas Operator | Mar 2026 |
| 9513 | Ensz, Jerry | Sublette, KS 67877 | Gas Operator | Sep 2025 |
| 9514 | Entek GRB LLC | | Oil & Gas Operator | Oct 2021 |
| 9515 | Enterprise Energy Corp | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1985 |
| 9516 | Enterprise Energy Exploration Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Jan 2026 |
| 9517 | Enterprise Energy Prod Co Inc | Tulsa, OK 74133-6754 | Oil & Gas Operator | Mar 2015 |
| 9518 | Enterprise Exploration Inc | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2020 |
| 9519 | Enterprise Gathering LLC | | Oil Operator | Dec 2024 |
| 9520 | Enterprise Inc | Hays, KS 67601 | Oil Operator | Sep 2015 |
| 9521 | Enterprise Marke | | Oil & Gas Operator | Oct 1992 |
| 9522 | Enterprise Oil Marketing Corp. | Little Rock, AR 72206 | Oil Operator | Sep 1998 |
| 9523 | Enterprise Resources Inc. | | Oil & Gas Operator | Jun 1979 |
| 9524 | Enterprising Enterprises Inc | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 9525 | Enterra Resources, LLC | Edmond, OK 73083 | Oil & Gas Operator | Sep 2025 |
| 9526 | Entex Oil Company | | Gas Operator | Dec 1993 |
| 9527 | Entex Petroleum Inc | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 1997 |
| 9528 | Entex, Inc. | | Oil & Gas Operator | Dec 1984 |
| 9529 | Entransco Energy LLC | Dewey, OK 74029 | Oil & Gas Operator | Oct 2024 |
| 9530 | Enveron Corporation | Portage, MI 49024 | Oil & Gas Operator | Dec 2017 |
| 9531 | Envirogas Inc | Hamburg, NY 14075 | Oil & Gas Operator | Dec 1992 |
| 9532 | Environmental BR Ser Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1987 |
| 9533 | Environmental Exp Co | North Canton, OH 44720 | Oil & Gas Operator | Dec 1998 |
| 9534 | Environmental Oil Co | Thornville, OH 43076 | Oil & Gas Operator | Dec 2024 |
| 9535 | Environmental Soil Recovery LTD | | Oil Operator | Jan 2026 |
| 9536 | Envirotek Fuel Systems Inc | Dallas, TX 75243 | Oil & Gas Operator | May 2013 |
| 9537 | Enwest Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Aug 1994 |
| 9538 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 9539 | EOG A Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Dec 2018 |
| 9540 | EOG M Resources, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Dec 2018 |
| 9541 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 9542 | EOG Y Resources, Inc. | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 9543 | Eok Operating LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jan 2026 |
| 9544 | Eor LLC | | Oil & Gas Operator | Nov 2013 |
| 9545 | Eor Operating Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2026 |
| 9546 | Eos Energy LLC | Columbus, OH 43026 | Oil & Gas Operator | Dec 2024 |
| 9547 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 9548 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 9549 | EP Energy E&P Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 9550 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 9551 | EP Operating Co, A LTD Ptrship | | Oil & Gas Operator | Oct 1992 |
| 9552 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 9553 | EP Operating Company LP | Midland, TX 79705-5510 | Oil & Gas Operator | Mar 1993 |
| 9554 | EP Operating Limited Partnership | Dallas, TX 75201 | Oil & Gas Operator | Feb 1995 |
| 9555 | EP Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 9556 | EP&W | | Oil Operator | Dec 1997 |
| 9557 | Epic Energy, L.L.C. | Aztec, NM 87410 | Oil & Gas Operator | Jan 2026 |
| 9558 | Epic Permian Operating, LLC | Arvada, CO 80006 | Oil & Gas Operator | Jan 2025 |
| 9559 | Epl Oil & Gas, Inc | | Oil & Gas Operator | Aug 2015 |
| 9560 | Epley Bobbie Inc | Wilson, OK 73463-6319 | Oil Operator | Jun 2007 |
| 9561 | Epoc, LLC | Andover, KS 67002 | Oil Operator | Sep 2025 |
| 9562 | Epoch Petroleum Corporation | | Oil & Gas Operator | Dec 1992 |
| 9563 | Epoch Resources Of Texas Inc | Port Aransas, TX 78373-1637 | Oil & Gas Operator | Nov 2014 |
| 9564 | Epperson Dwight | Okemah, OK 74859 | Oil Operator | Jan 2013 |
| 9565 | Epperson John R | Bartlesville, OK 74003 | Oil Operator | Aug 1999 |
| 9566 | Eps Resources Corp | Englewood, CO 80111 | Oil & Gas Operator | Dec 2009 |
| 9567 | Epstein Jr Oper Co | | Oil & Gas Operator | Mar 1991 |
| 9568 | Epstein, Edwin A Jr Oper Co Inc | Las Vegas, NV 89128 | Gas Operator | Dec 2001 |
| 9569 | Eqt Aro LLC | Canonsburg, PA 15317-1000 | Gas Operator | Dec 2025 |
| 9570 | Eqt Chap, LLC | Canonsburg, PA 15317-1000 | Oil & Gas Operator | Dec 2025 |
| 9571 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Dec 2025 |
| 9572 | Eqt Production Texas, LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Jun 2018 |
| 9573 | Equal Energy Us Inc | Tulsa, OK 74103-4621 | Oil & Gas Operator | Nov 2019 |
| 9574 | Equinor Energy LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2021 |
| 9575 | Equinor USA Onshore Properties Inc. | Houston, TX 77042 | Oil & Gas Operator | Mar 2024 |
| 9576 | Equinox Oil Comp | | Oil Operator | Dec 1996 |
| 9577 | Equinox Oil Company Inc | Plainville, KS 67663 | Oil & Gas Operator | Dec 2019 |
| 9578 | Equipment Lott Inc The | Hennessey, OK 73742-0655 | Oil & Gas Operator | Mar 2008 |
| 9579 | Equipment, Inc. | | Oil & Gas Operator | Mar 1983 |
| 9580 | Equitable Gas Company | Pittsburgh, PA 15212-5352 | Gas Operator | Dec 2013 |
| 9581 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 9582 | Equitable Prod Eastern States Exploration Inc | Snow Shoe, PA 16874-0178 | Gas Operator | Dec 2001 |
| 9583 | Equitable Production Company | Charleston, WV 25302 | Oil & Gas Operator | Dec 2007 |
| 9584 | Equitable Resources Energy | Houston, TX 77056-2742 | Oil & Gas Operator | Sep 1997 |
| 9585 | Equitable Resources Energy Co | Big Stone Gap, VA 24219 | Gas Operator | Dec 1995 |
| 9586 | Equitable Resources Energy Co, Western Region | Billings, MT 59102 | Oil & Gas Operator | May 1997 |
| 9587 | Equitrans Inc | Cannonsburg, PA 15317 | Oil & Gas Operator | Dec 2018 |
| 9588 | Equitrans, L. P. | Cannonsburg, PA 15317 | Oil & Gas Operator | Jul 2021 |
| 9589 | Equity Drilling Company Inc | Dewey, OK 74029 | Oil & Gas Operator | Nov 1998 |
| 9590 | Equity Export Oil & Gas Co Inc | Kansas City, MO 64116 | Oil & Gas Operator | Feb 2002 |
| 9591 | Equity Oil & Gas Funds Inc | Orlando, FL 32837-6103 | Oil & Gas Operator | Dec 2025 |
| 9592 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
| 9593 | Eqv Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Mar 2026 |
| 9594 | Eram, Inc. | | Oil & Gas Operator | Dec 2024 |
| 9595 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2026 |
| 9596 | Erbe, Dwayne E. (Estate) | Neodesha, KS 66757 | Oil Operator | Jul 2025 |
| 9597 | Erbert Don Oil C | | Oil Operator | May 1993 |
| 9598 | Erbert, Harold | Iola, KS 66749 | Oil Operator | Dec 1992 |
| 9599 | Erebor Resources LLC | Tyler, TX 75702 | Oil & Gas Operator | Dec 2025 |
| 9600 | Ereunao Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2003 |