| 601 | King Drilling Co | Seville, OH 44273 | Oil & Gas Operator | Dec 2025 |
| 602 | King Energy Co. | | Oil Operator | Nov 2019 |
| 603 | King Energy Comp | | Oil Operator | Dec 1996 |
| 604 | King Energy LLC | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Mar 2026 |
| 605 | King Energy Resources | Kerrville, TX 78029 | Oil & Gas Operator | Jun 2026 |
| 606 | King Jerry L | Wann, OK 74083-9727 | Oil & Gas Operator | Oct 2019 |
| 607 | King Oil & Gas Co. | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 608 | King Oil & Resources Co | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 609 | King Oil Operations, LLC | Ellis, KS 67637 | Oil Operator | Feb 2026 |
| 610 | King Oil, Inc. | Jetmore, KS 67854 | Oil Operator | Jan 2026 |
| 611 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Jun 2026 |
| 612 | King Petroleum 2 | Nashport, OH 43830 | Oil & Gas Operator | Dec 2023 |
| 613 | King Ranch Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 614 | King Ranch Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 615 | King Resources Co. | | Oil & Gas Operator | Dec 1977 |
| 616 | King'S Well Service LLC | Blackwell, OK 74631 | Oil Operator | Feb 2026 |
| 617 | King-Goen Oil, LLC | Abilene, TX 79602 | Oil Operator | Jun 2026 |
| 618 | King-Sherwood Oil | Condon, MT 59826 | Oil Operator | Feb 2026 |
| 619 | Kingdom Resources Corporation | Austin, TX 78701 | Oil & Gas Operator | Sep 1993 |
| 620 | Kingdom Resources Inc | Frisco, TX 75033-3673 | Oil & Gas Operator | Jun 2023 |
| 621 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2026 |
| 622 | Kingery, Johnny | Clyde, TX 79510 | Oil & Gas Operator | Oct 1997 |
| 623 | Kingfish Gathering LLC | Lago VIsta, TX 78645 | Oil & Gas Operator | Jun 2026 |
| 624 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 625 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | Mar 2026 |
| 626 | Kingman Operating Company, Inc. | Austin, TX 78729 | Oil Operator | Jun 2013 |
| 627 | Kingman Petroleum Inc | Dolores, CO 81323-9503 | Oil & Gas Operator | Oct 2025 |
| 628 | Kings CRK Land Oil & Cattle, LLC | Breckenridge, TX 76424 | Oil Operator | Jun 2026 |
| 629 | Kings Oil Company, Inc. | | Oil Operator | Jun 1989 |
| 630 | Kings Peak Energy LLC | Denver, CO 80264 | Oil & Gas Operator | Feb 2019 |
| 631 | Kings X Oil Company LLC | Gillette, WY 82717 | Oil Operator | Aug 2016 |
| 632 | Kingsbury Petrol | | Oil Operator | Jul 1986 |
| 633 | Kingston Oil Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2000 |
| 634 | Kingston Operating Company | | Oil & Gas Operator | Oct 2009 |
| 635 | Kingwood Energy, LLC | | Oil Operator | Feb 2025 |
| 636 | Kingwood Exploration LLC | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2026 |
| 637 | Kingwood Oil Co; Inc | Luling, TX 78648 | Oil & Gas Operator | Nov 2015 |
| 638 | Kingwood Resources | Luling, TX 78648 | Oil & Gas Operator | Feb 2002 |
| 639 | Kingwood Resources, Inc. | Kingwood, TX 77339 | Oil & Gas Operator | May 2022 |
| 640 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jun 2026 |
| 641 | Kinney Incorporated | Andrews, TX 79714 | Oil & Gas Operator | Jun 2026 |
| 642 | Kinney Oil Company | Denver, CO 80202 | Oil Operator | Dec 2024 |
| 643 | Kinsey Interests | | Oil & Gas Operator | May 1991 |
| 644 | Kinsey Interests And Marlin | | Oil Operator | Mar 1983 |
| 645 | Kinsey Interests Et Al | | Oil Operator | Apr 1988 |
| 646 | Kintex Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 647 | Kinzer, J. W. | | Oil & Gas Operator | Dec 2006 |
| 648 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 649 | Kiowa Producers, LLC | Parsons, KS 67357 | Oil & Gas Operator | Oct 2025 |
| 650 | Kiowa-T.N.T., Inc. | | Oil Operator | Sep 1981 |
| 651 | Kipling Energy Incorporated | Shelby, MT 59474 | Oil & Gas Operator | Jan 2011 |
| 652 | Kirby & Son Dozing | Lewisburg, KY 42256 | Oil Operator | Dec 2023 |
| 653 | Kirby Exploration Co Of Texas | | Oil & Gas Operator | Nov 1993 |
| 654 | Kirby Exploration Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2014 |
| 655 | Kirby Oil Company | | Oil Operator | Dec 2024 |
| 656 | Kirk Billie E | Morris, OK 74445 | Oil & Gas Operator | Feb 2026 |
| 657 | Kirk David | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 658 | Kirk Tank Trucks Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 659 | Kirkconnell And Associates | | Oil & Gas Operator | Dec 1996 |
| 660 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 661 | Kirkpatrick | Longton, KS 67352 | Oil Operator | Jun 2000 |
| 662 | Kirkpatrick Oil & Gas Co. | Pampa, TX 79066 | Oil & Gas Operator | Apr 1996 |
| 663 | Kirkpatrick Oil & Gas L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Dec 2010 |
| 664 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 665 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 666 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 667 | Kirkpatrick, John Oil LLC | Victoria, TX 77905 | Oil & Gas Operator | Jun 2026 |
| 668 | Kirkwood Engineering, LTD | | Oil Operator | Dec 1991 |
| 669 | Kirkwood Oil And Gas Co. | | Oil Operator | Jan 1988 |
| 670 | Kirkwood W C | Casper, WY 82602 | Oil & Gas Operator | May 2005 |
| 671 | Kirrie Oil Company LLC | Oklahoma City, OK 73113-0125 | Oil & Gas Operator | Jun 2025 |
| 672 | Kirsch, Doris R. | Strykersville, NY 14145 | Gas Operator | Dec 2024 |
| 673 | Kirtley, Ralph | | Oil & Gas Operator | Dec 2005 |
| 674 | Kis Oil & Gas Inc | Brookville, PA 15825-4210 | Oil & Gas Operator | Dec 2014 |
| 675 | Kiska Oil & Gas Inc | Tulsa, OK 74103 | Oil Operator | Oct 2012 |
| 676 | Kiska Oil Compan | | Oil & Gas Operator | Oct 1989 |
| 677 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 678 | Kismet Properties, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2026 |
| 679 | Kiss Productions | | Oil & Gas Operator | Oct 2002 |
| 680 | Kissack Resources. LLC | | Oil & Gas Operator | Apr 2026 |
| 681 | Kissack Water & Oil Service Inc | Rozet, WY 82727 | Oil & Gas Operator | Apr 2026 |
| 682 | Kissinger Petroleum Corp | | Oil & Gas Operator | Nov 1983 |
| 683 | Kistler John & Ruth | Newcomerstown, OH 43832 | Oil & Gas Operator | Dec 1998 |
| 684 | Kitchen, Robert (Deceased) | Osawatomie, KS 66064 | Oil Operator | Oct 2009 |
| 685 | Kittle Oil | | Oil Operator | Nov 2025 |
| 686 | Kiva Resources Inc. | Houston, TX 77265 | Oil & Gas Operator | Mar 2008 |
| 687 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 688 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 689 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Feb 2026 |
| 690 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Jul 2024 |
| 691 | KJ Energy, LLC Of Delaware | | Oil & Gas Operator | Nov 2016 |
| 692 | KJB Oil Company LLC | Dewey, OK 74029-3053 | Oil Operator | Mar 2026 |
| 693 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 694 | KJR Services LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2026 |
| 695 | Klabzuba Brothers LLC | Prague, OK 74864-0567 | Oil & Gas Operator | Jul 2007 |
| 696 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 697 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 698 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 699 | Klaeger Operating Company II,LLC | Maxwell, TX 78656 | Oil Operator | Jun 2026 |
| 700 | Klaeger Operating Company, LLC | Horseshoe Bay, TX 78657 | Oil Operator | Jun 2026 |