| 601 | King Petroleum 2 | Nashport, OH 43830 | Oil & Gas Operator | Dec 2022 |
| 602 | King Ranch Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 603 | King Ranch Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 604 | King Resources Co. | | Oil & Gas Operator | Dec 1977 |
| 605 | King'S Well Service LLC | Blackwell, OK 74631 | Oil Operator | Dec 2023 |
| 606 | King-Goen Oil, LLC | Abilene, TX 79602 | Oil Operator | Apr 2024 |
| 607 | King-Sherwood Oil | Condon, MT 59826 | Oil Operator | Feb 2024 |
| 608 | Kingdom Resources Corporation | Austin, TX 78701 | Oil & Gas Operator | Sep 1993 |
| 609 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Jan 2024 |
| 610 | Kingery, Johnny | Clyde, TX 79510 | Oil & Gas Operator | Oct 1997 |
| 611 | Kingfish Gathering LLC | Lago VIsta, TX 78645 | Oil & Gas Operator | Apr 2024 |
| 612 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 613 | Kingfisher Resources Inc | Clinton, OK 73601-1237 | Oil & Gas Operator | Jan 2024 |
| 614 | Kingman Operating Company, Inc. | Austin, TX 78729 | Oil Operator | Jun 2013 |
| 615 | Kingman Petroleum Inc | Dolores, CO 81323-9503 | Oil & Gas Operator | Mar 2023 |
| 616 | Kings CRK Land Oil & Cattle, LLC | Breckenridge, TX 76424 | Oil Operator | Apr 2024 |
| 617 | Kings Oil Company, Inc. | | Oil Operator | Jun 1989 |
| 618 | Kings Peak Energy LLC | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 619 | Kings X Oil Company LLC | Gillette, WY 82717 | Oil Operator | Aug 2016 |
| 620 | Kingsbury Petrol | | Oil Operator | Jul 1986 |
| 621 | Kingston Oil Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2000 |
| 622 | Kingston Operating Company | | Oil & Gas Operator | Oct 2009 |
| 623 | Kingwood Energy, LLC | | Oil Operator | Nov 2023 |
| 624 | Kingwood Exploration LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2024 |
| 625 | Kingwood Oil Co; Inc | Luling, TX 78648 | Oil & Gas Operator | Nov 2015 |
| 626 | Kingwood Resources, Inc. | Kingwood, TX 77339 | Oil & Gas Operator | May 2022 |
| 627 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Apr 2024 |
| 628 | Kinney Incorporated | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 629 | Kinney Oil Company | Denver, CO 80202 | Oil Operator | Jul 2022 |
| 630 | Kinsey Interests | | Oil & Gas Operator | May 1991 |
| 631 | Kinsey Interests And Marlin | | Oil Operator | Mar 1983 |
| 632 | Kinsey Interests Et Al | | Oil Operator | Apr 1988 |
| 633 | Kintex Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 634 | Kinzer, J. W. | | Oil & Gas Operator | Dec 2006 |
| 635 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Dec 2023 |
| 636 | Kiowa Producers, LLC | Parsons, KS 67357 | Oil & Gas Operator | Dec 2023 |
| 637 | Kiowa-T.N.T., Inc. | | Oil Operator | Sep 1981 |
| 638 | Kipling Energy Incorporated | Shelby, MT 59474 | Oil & Gas Operator | Jan 2011 |
| 639 | Kirby & Son Dozing | Lewisburg, KY 42256 | Oil Operator | Dec 2022 |
| 640 | Kirby Exploration Co | Houston, TX 77251 | Oil & Gas Operator | Jan 2014 |
| 641 | Kirby Exploration Co Of Texas | | Oil & Gas Operator | Nov 1993 |
| 642 | Kirby Oil Company | | Oil Operator | Jan 2024 |
| 643 | Kirk Billie E | Morris, OK 74445-0146 | Oil & Gas Operator | Dec 2023 |
| 644 | Kirk David | Midland, TX 79705-7433 | Oil & Gas Operator | Dec 2023 |
| 645 | Kirk Tank Trucks Inc | Morris, OK 74445-4832 | Oil & Gas Operator | Dec 2021 |
| 646 | Kirkconnell And Associates | | Oil & Gas Operator | Dec 1996 |
| 647 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 648 | Kirkpatrick | Longton, KS 67352 | Oil Operator | Jun 2000 |
| 649 | Kirkpatrick Oil & Gas Co. | Pampa, TX 79066 | Oil & Gas Operator | Apr 1996 |
| 650 | Kirkpatrick Oil & Gas L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Dec 2010 |
| 651 | Kirkpatrick Oil Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2024 |
| 652 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Dec 2023 |
| 653 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 654 | Kirkpatrick, John Oil LLC | Victoria, TX 77905 | Oil & Gas Operator | Apr 2024 |
| 655 | Kirkwood Engineering, LTD | | Oil Operator | Dec 1991 |
| 656 | Kirkwood Oil And Gas Co. | | Oil Operator | Jan 1988 |
| 657 | Kirkwood W C | Casper, WY 82602 | Oil & Gas Operator | May 2005 |
| 658 | Kirrie Oil Company LLC | Oklahoma City, OK 73113-0125 | Oil & Gas Operator | Nov 2016 |
| 659 | Kirsch, Doris R. | Strykersville, NY 14145 | Gas Operator | Dec 2022 |
| 660 | Kirtley, Ralph | | Oil & Gas Operator | Dec 2005 |
| 661 | Kis Oil & Gas Inc | Brookville, PA 15825-4210 | Oil & Gas Operator | Dec 2014 |
| 662 | Kiska Oil & Gas Inc | Tulsa, OK 74103 | Oil Operator | Oct 2012 |
| 663 | Kiska Oil Compan | | Oil & Gas Operator | Oct 1989 |
| 664 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 665 | Kismet Properties, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2024 |
| 666 | Kiss Productions | | Oil & Gas Operator | Oct 2002 |
| 667 | Kissack Resources. LLC | | Oil Operator | Feb 2024 |
| 668 | Kissack Water & Oil Service Inc | Rozet, WY 82727 | Oil & Gas Operator | Feb 2024 |
| 669 | Kissinger Petroleum Corp | | Oil & Gas Operator | Nov 1983 |
| 670 | Kistler John & Ruth | Newcomerstown, OH 43832 | Oil & Gas Operator | Dec 1998 |
| 671 | Kitchen, Robert (Deceased) | Osawatomie, KS 66064 | Oil Operator | Oct 2009 |
| 672 | Kittle Oil | | Oil Operator | Jul 2023 |
| 673 | Kiva Resources Inc. | Houston, TX 77265 | Oil & Gas Operator | Mar 2008 |
| 674 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 675 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 676 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Dec 2023 |
| 677 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Apr 2024 |
| 678 | KJ Energy, LLC Of Delaware | | Oil & Gas Operator | Nov 2016 |
| 679 | KJB Oil Company LLC | Dewey, OK 74029-3053 | Oil Operator | Dec 2023 |
| 680 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 681 | KJR Services LLC | | Oil & Gas Operator | Nov 2023 |
| 682 | Klabzuba Brothers LLC | Prague, OK 74864-0567 | Oil & Gas Operator | Jul 2007 |
| 683 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 684 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 685 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 686 | Klaeger Operating Company II,LLC | Marble Falls, TX 78654 | Oil Operator | Apr 2024 |
| 687 | Klaeger Operating Company, LLC | Marble Falls, TX 78654 | Oil Operator | Apr 2024 |
| 688 | Klaeger, J. H. | Hondo, TX 78861 | Oil & Gas Operator | Dec 2009 |
| 689 | Klassen Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 690 | Klause & Klaus Oil Co. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2003 |
| 691 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 692 | KLBW Partners LLC | Ratliff City, OK 73481-0088 | Oil & Gas Operator | Nov 2023 |
| 693 | KLC Petroleum Company, LLC | Henderson, KY 42420 | Oil Operator | Dec 2021 |
| 694 | KLD Energy | | Oil & Gas Operator | Dec 2015 |
| 695 | Kleen Oilfield Services Co | Velma, OK 73491-0178 | Oil & Gas Operator | Nov 2023 |
| 696 | Kleese Development Associates | Youngstown, OH 44514 | Oil & Gas Operator | Dec 2023 |
| 697 | Klein Oil & Logging | Alma, NY 14708 | Oil & Gas Operator | Dec 2022 |
| 698 | Klein, J. L. | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2013 |
| 699 | Klenda, John | Marion, KS 66861 | Gas Operator | Dec 2023 |
| 700 | KLH Oil & Gas, Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2024 |