| 601 | Brull, Allen | Victoria, KS 67671 | Oil Operator | Nov 2025 |
| 602 | Brundred Petrole | | Oil Operator | Apr 1986 |
| 603 | Bruner, Alan | Moline, KS 67353 | Oil Operator | Jun 2003 |
| 604 | Brungardt Oil And Leasing Inc. | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 605 | Bruning, Donald F. | Sterling, KS 67579 | Oil Operator | Apr 2001 |
| 606 | Brunson Producti | | Oil & Gas Operator | Aug 1993 |
| 607 | Brunson Production, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Dec 2025 |
| 608 | Bryan Eugene W S | | Oil & Gas Operator | Nov 1995 |
| 609 | Bryan, Dorothy J. | Canton, KS 67428 | Oil & Gas Operator | Nov 2000 |
| 610 | Bryant Investors, A General Partnership | Lyons, KS 67554 | Oil Operator | Oct 2009 |
| 611 | Bta Operating | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 612 | Buccaneer Petrol | | Oil Operator | Jan 1988 |
| 613 | Buck Paul J | | Oil & Gas Operator | Feb 1995 |
| 614 | Buck, Paul Jordan | Sedan, KS 67361 | Oil & Gas Operator | Dec 2025 |
| 615 | Buckeye Corporat | | Oil Operator | Dec 1996 |
| 616 | Buckeye West LLC | Wooster, OH 44691 | Oil Operator | Dec 2025 |
| 617 | Buddie Sallee | Humboldt, KS 66748 | Oil Operator | Dec 2002 |
| 618 | Buffalo Oil & Gas LLC | Oxford, KS 67119 | Oil & Gas Operator | Dec 2025 |
| 619 | Buffalo Operating Corporation | Westminister, CO 80234 | Oil & Gas Operator | Dec 2001 |
| 620 | Buffalo Resources LLC | Woodward, OK 73801 | Oil & Gas Operator | Aug 2025 |
| 621 | Bullseye Oilfield Service | Cunningham, KS 67035 | Oil Operator | Apr 2023 |
| 622 | Bullseye Petrole | | Oil Operator | Oct 1992 |
| 623 | Bullseye Petroleum, Inc. | Wichita, KS 67230 | Oil Operator | Oct 2025 |
| 624 | Burch Exploratio | | Oil Operator | Mar 1991 |
| 625 | Burdett, Alfred | Sedan, KS 67361 | Oil Operator | Aug 2008 |
| 626 | Buried Hills Prod. Co., Inc. | Midvale, UT 84047 | Oil Operator | Dec 2006 |
| 627 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 628 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 629 | Burnett Corporat | | Oil & Gas Operator | Oct 1993 |
| 630 | Burns WM J | | Oil Operator | Jun 1994 |
| 631 | Burris Energy LLC | Burlington, KS 66839 | Oil & Gas Operator | Sep 2016 |
| 632 | Burris Ronald/Si | | Oil Operator | Jun 1992 |
| 633 | Burris, J. R. | Manhattan, KS 66502 | Oil Operator | Dec 2019 |
| 634 | Burton Oil Produ | | Oil Operator | Jan 1985 |
| 635 | Butler Petroleum LLC | Van Alstyne, TX 75495 | Oil Operator | May 2020 |
| 636 | Butler, Harold F. | Independence, KS 67301 | Oil Operator | Sep 2002 |
| 637 | Butte Oil And Gas Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2026 |
| 638 | Buttonwood Petro | | Oil & Gas Operator | Aug 1994 |
| 639 | BWC Energy LLC | Edgerton, KS 66021 | Oil Operator | Dec 2025 |
| 640 | Byers Clarice An | | Oil Operator | Nov 1988 |
| 641 | C & B Operating Inc. | St John, KS 67576 | Oil & Gas Operator | Dec 2025 |
| 642 | C & C Oil | | Oil & Gas Operator | Jan 2004 |
| 643 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Apr 2026 |
| 644 | C & C Tank Service, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2020 |
| 645 | C & D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Jan 2026 |
| 646 | C & E Oil, LLC | Grenola, KS 67346 | Oil Operator | Nov 2021 |
| 647 | C & E Prod Incor | | Oil Operator | Nov 1996 |
| 648 | C & F Ranch LLC | Iola, KS 66749 | Oil Operator | Dec 2025 |
| 649 | C & G Drilling, Inc | Eureka, KS 67045 | Oil Operator | Dec 2025 |
| 650 | C & G Oil Compan | | Oil & Gas Operator | Dec 1989 |
| 651 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 652 | C & J Production LLC | Marion, KS 66861 | Oil & Gas Operator | Feb 2025 |
| 653 | C & J Pumping, Inc. | Sylvia, KS 67581 | Oil & Gas Operator | Dec 2009 |
| 654 | C & K Operating LLC | Kingman, KS 67068 | Oil & Gas Operator | Dec 2025 |
| 655 | C & R Drilling C | | Oil Operator | Aug 1994 |
| 656 | C & R Oil | | Oil Operator | Dec 2025 |
| 657 | C & R Petroleum Company | Duncan, OK 73533-1341 | Oil & Gas Operator | Dec 2025 |
| 658 | C & R Well Servi | | Oil Operator | Sep 1996 |
| 659 | C & R Well Service, A General Partnership | Garnett, KS 66032 | Oil Operator | Dec 2009 |
| 660 | C & S Oil | | Oil Operator | Dec 2019 |
| 661 | C & S Oil Compan | | Oil & Gas Operator | Jun 1992 |
| 662 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 663 | C & S Oil Company, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 664 | C & S Well Servi | | Oil & Gas Operator | Nov 1995 |
| 665 | C & S Well Servicing Co. | Lyons, KS 67554 | Oil & Gas Operator | Jul 2000 |
| 666 | C A P Operating | | Oil Operator | Sep 1992 |
| 667 | C C & S Oil Oper | | Oil Operator | Apr 1983 |
| 668 | C D Oil | Wellsville, KS 66092 | Oil Operator | Aug 1998 |
| 669 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 670 | C F Oil - Frazie | | Oil Operator | Dec 1994 |
| 671 | C G Oil, Inc. | Victoria, KS 67671 | Oil Operator | Dec 2025 |
| 672 | C K Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2025 |
| 673 | C M T Petroleum | | Oil Operator | Jul 1995 |
| 674 | C M X Incorporat | | Oil & Gas Operator | Dec 1996 |
| 675 | C N B Enterprises | Yates Center, KS 66783 | Oil & Gas Operator | Jan 2009 |
| 676 | C R A C O Incorp | | Oil Operator | May 1988 |
| 677 | C W Oil Producer | | Oil Operator | Oct 1998 |
| 678 | C-V Oil Company | Memphis, TN 38103 | Oil Operator | Jun 1998 |
| 679 | C. D. Oil, Inc. | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 680 | C. F. Oil, A General Partnership | Lake Lotawana, MO 64086 | Oil Operator | Nov 2025 |
| 681 | C. H. Todd, Inc. | Wichita, KS 67212 | Oil & Gas Operator | Dec 2019 |
| 682 | C12 Kansas Oil, LLC | Denver, CO 80202 | Oil Operator | Dec 2009 |
| 683 | C3oil, LLC | New Strawn, KS 66839 | Oil Operator | Dec 2025 |
| 684 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 685 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2026 |
| 686 | Cabot Petroleum | | Oil & Gas Operator | Oct 1996 |
| 687 | Caerus Kansas LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2026 |
| 688 | Caerus Washco LLC | Denver, CO 80202 | Gas Operator | Mar 2015 |
| 689 | Cahoj, H. Drilling | McDonald, KS 67745 | Oil Operator | Jan 2000 |
| 690 | Cain, Jim | Great Bend, KS 67530 | Oil Operator | Feb 2009 |
| 691 | Cal Oil | | Oil Operator | Jul 1986 |
| 692 | Caldwell Entr In | | Oil Operator | Dec 1993 |
| 693 | Calgary Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Feb 2026 |
| 694 | Calvin Explorati | | Oil & Gas Operator | Oct 1991 |
| 695 | Calvin Noah, LLC | Valley Center, KS 67147 | Oil Operator | Dec 2025 |
| 696 | Cam Development | | Oil & Gas Operator | Dec 1990 |
| 697 | Cambern, Rex | Montgomery, TX 77356 | Oil Operator | Jan 1996 |
| 698 | Cambria Corporation | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 699 | Cambron, Paul L. | Ness City, KS 67560 | Oil & Gas Operator | Dec 2019 |
| 700 | Camio Enterprises, LLC | Augusta, KS 67010 | Oil Operator | Dec 2025 |