| 15501 | Kathler Oil Interests | Frisco, TX 75034 | Oil & Gas Operator | Mar 2026 |
| 15502 | Kato Operating C | | Oil Operator | Aug 1988 |
| 15503 | Kato Operating Company | Bristow, OK 74010 | Oil & Gas Operator | Mar 2015 |
| 15504 | Katsco Energy, Inc. | Round Rock, TX 78664 | Oil & Gas Operator | Mar 2026 |
| 15505 | Katy Drilling Corporation | Tulsa, OK 74146-3717 | Oil & Gas Operator | Apr 2020 |
| 15506 | Katy Resources Etx, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2011 |
| 15507 | Katy Resources LLC | Arlington, TX 76016 | Oil & Gas Operator | Mar 2026 |
| 15508 | Katz Joe Oil Acc | | Oil Operator | Oct 1995 |
| 15509 | Katz Oil Co. | San Antonio, TX 78218 | Oil & Gas Operator | Dec 2002 |
| 15510 | Kauffman K P Company Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 1996 |
| 15511 | Kauthar Energy Co., Inc. | | Oil & Gas Operator | Dec 2002 |
| 15512 | Kavanaugh Energy Services, Inc. | | Gas Operator | Nov 2025 |
| 15513 | Kavouras Thomas | Apollo, PA 15613-1108 | Oil & Gas Operator | Dec 2023 |
| 15514 | Kay County Properties | Tulsa, OK 74145 | Oil & Gas Operator | May 1997 |
| 15515 | Kay Dee Oil | | Oil Operator | Sep 2025 |
| 15516 | Kay Jay Oil Co | Artesia, NM 88210 | Oil & Gas Operator | May 2001 |
| 15517 | Kay Lease Service | | Oil Operator | Feb 1981 |
| 15518 | Kay Operating Co. | | Oil Operator | May 1982 |
| 15519 | Kay Production Company | Seminole, OK 74868 | Oil & Gas Operator | Dec 2025 |
| 15520 | Kay-Lyn Petroleum Co. | | Oil & Gas Operator | Oct 1989 |
| 15521 | Kaye Poth Oil Corp. | Seguin, TX 78155 | Oil & Gas Operator | May 1998 |
| 15522 | Kaye R. McCown | | Oil Operator | Jun 2012 |
| 15523 | Kayuga Co. | Tulsa, OK 74133 | Oil & Gas Operator | Mar 2026 |
| 15524 | Kazmark, Adam & Tara | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 15525 | KB Oil & Gas, LLC | Weatherford, OK 73096 | Oil & Gas Operator | Dec 2025 |
| 15526 | KBD Oil And Gas Production LLC | Brinkhaven, OH 43006 | Oil & Gas Operator | Dec 2024 |
| 15527 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 15528 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Dec 2025 |
| 15529 | KC Well Service | Big Piney, WY 83113 | Gas Operator | Jan 2026 |
| 15530 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 15531 | KCP Of MS Inc | | Oil & Gas Operator | Jan 1991 |
| 15532 | KCR Energy, L.L.C. | Fate, TX 75132 | Oil Operator | Mar 2026 |
| 15533 | KCS Energy Inc | Warren, PA 16365-0187 | Oil & Gas Operator | Dec 2025 |
| 15534 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 15535 | KCS Mountain Resources Inc | Manderson, WY 82432 | Oil & Gas Operator | Nov 2006 |
| 15536 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 15537 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 15538 | KD Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2026 |
| 15539 | KDM Operating, LLC | The Woodlands, TX 77380 | Oil Operator | Mar 2026 |
| 15540 | KDM Production Co | Ozona, TX 76943 | Oil & Gas Operator | Mar 2026 |
| 15541 | Ke-La-Da Enterprises, Inc. | | Oil Operator | Dec 1984 |
| 15542 | Keahey Exploration, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2002 |
| 15543 | Keane Dev | Bradford, PA 16701-3901 | Oil & Gas Operator | Dec 1998 |
| 15544 | Keas Production Company LLC | Estes Park, CO 80517 | Oil Operator | Jan 2026 |
| 15545 | Keating Energy, Inc. | FT Washington, PA 19034 | Oil & Gas Operator | Mar 2026 |
| 15546 | Keba Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2015 |
| 15547 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2026 |
| 15548 | Kebrh Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 15549 | Kec Enterprises, Inc. | Springtown, TX 76082 | Oil & Gas Operator | Mar 2026 |
| 15550 | Kecco, Inc. | | Oil Operator | May 2002 |
| 15551 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Dec 2025 |
| 15552 | Keck Partners | | Oil & Gas Operator | Apr 1989 |
| 15553 | Keck Petroleum LLC | Okmulgee, OK 74447-8516 | Oil & Gas Operator | Oct 2025 |
| 15554 | Keck Timothy A | Summerville, PA 15864-6301 | Gas Operator | Dec 2014 |
| 15555 | Kedco Management Corp | | Oil & Gas Operator | Jul 1985 |
| 15556 | Keel Dwight E | Broken Arrow, OK 74014-7569 | Oil Operator | Apr 2020 |
| 15557 | Keelex Corporation | | Oil & Gas Operator | Dec 2021 |
| 15558 | Keeley Oil, L.L.C. | Dallas, TX 75225 | Oil Operator | Mar 2026 |
| 15559 | Keen Oil Co | | Oil & Gas Operator | Aug 2025 |
| 15560 | Keen Operating Company, Inc. | Austin, TX 78705 | Oil & Gas Operator | Aug 2001 |
| 15561 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 15562 | Keener Energy Company | Tulsa, OK 74103-4043 | Oil & Gas Operator | Jan 2014 |
| 15563 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Jan 2026 |
| 15564 | Keener Oil Compa | | Oil & Gas Operator | Jul 1988 |
| 15565 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 15566 | Keesee Paul Inc | Holdenville, OK 74848 | Oil & Gas Operator | Nov 1998 |
| 15567 | Keesun Corporation | Cut Bank, MT 59427 | Oil & Gas Operator | Dec 2025 |
| 15568 | Keft Oil Company | Pleasanton, TX 78064 | Oil & Gas Operator | Feb 2003 |
| 15569 | Kehl Oil & Gas Enterprises LLC | Lower Salem, OH 45745 | Oil & Gas Operator | Dec 2024 |
| 15570 | Kehler & Kehler Oil Company | Skiatook, OK 74070-3674 | Oil & Gas Operator | Feb 2005 |
| 15571 | Keicher Bros. | Cowlesville, NY 14037 | Gas Operator | Dec 2024 |
| 15572 | Keirus, Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Mar 2026 |
| 15573 | Keisling, H. N. | Pampa, TX 79065 | Oil & Gas Operator | Aug 2015 |
| 15574 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2026 |
| 15575 | Keith Lynn Minerals LLC | Springfield, OH 45503 | Oil & Gas Operator | Dec 2024 |
| 15576 | Keith McClure | Waynesburg, PA 15370-3636 | Oil & Gas Operator | Dec 2025 |
| 15577 | Keith Petroleum Corporation | Houston, TX 77063 | Oil & Gas Operator | Jan 1993 |
| 15578 | Keith W. Burton | | Oil & Gas Operator | Jan 2025 |
| 15579 | Keith Walker O & G Co LLC | | Oil Operator | Jan 2026 |
| 15580 | Keith, Dennis | Waterville, NY 13480 | Gas Operator | Dec 2024 |
| 15581 | Keiths Pumping Service | Douglas, WY 82633 | Oil & Gas Operator | Aug 2003 |
| 15582 | Keito Gas Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 2020 |
| 15583 | Kek Exploration LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 15584 | Kelcas Well Services LTD | Owensboro, KY 42303 | Oil Operator | Dec 2021 |
| 15585 | Kelco Petroleum Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 15586 | Kele Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 15587 | Kellco Energy, LTD. | Houston, TX 77057 | Oil & Gas Operator | Nov 2007 |
| 15588 | Kelle Day Oil Producers Inc | Braman, OK 74632-9147 | Oil & Gas Operator | Dec 2023 |
| 15589 | Kelle Lambing Production Co | Braman, OK 74632-0132 | Oil & Gas Operator | Nov 2014 |
| 15590 | Keller Brothers & Co | Nelsonville, OH 45764 | Oil Operator | Dec 2019 |
| 15591 | Keller Estate Leases LLC | Bartlesville, OK 74003-3608 | Oil Operator | Aug 2012 |
| 15592 | Keller Heirs Oil | | Oil Operator | May 2025 |
| 15593 | Keller, Michael F. & Sharon Kay Ritchie | Alden, NY 14004 | Gas Operator | Dec 2024 |
| 15594 | Kellerville Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Mar 2026 |
| 15595 | Kelley Edgar Oil & Gas Operations | | Gas Operator | Nov 2015 |
| 15596 | Kelley Industries Inc | Waynesboro, MS 39367 | Oil & Gas Operator | Jul 2005 |
| 15597 | Kelley James C Estate | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 15598 | Kelley Oil & Gas | McAlester, OK 74570 | Oil & Gas Operator | May 2013 |
| 15599 | Kelley Oil & Sugar Creek Prod. | | Oil & Gas Operator | Oct 1992 |
| 15600 | Kelley Oil Corp/Yuma Petroleum | | Gas Operator | Jun 1994 |