| 2501 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Apr 2003 |
| 2502 | Kodiak Energy LLC | Pineville, MO 64856 | Oil Operator | Dec 2019 |
| 2503 | Kodiak Oil Co. | Stockton, MO 65785 | Oil Operator | May 1996 |
| 2504 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Sep 2025 |
| 2505 | Koehn Alfred D | | Oil & Gas Operator | Sep 1994 |
| 2506 | Koehn Eldon R | | Oil Operator | Dec 2009 |
| 2507 | Koehn Radell W | | Oil Operator | Dec 2009 |
| 2508 | Koehn, Alfred D.(Deceased) | Galva, KS 67443 | Oil Operator | Mar 1998 |
| 2509 | Koehn, Carolyn | Galva, KS 67443 | Oil Operator | Sep 2025 |
| 2510 | Koehn, John W. | Sublette, KS 67877 | Gas Operator | May 2018 |
| 2511 | Koehn, Max R. | Copeland, KS 67837 | Oil & Gas Operator | Oct 2019 |
| 2512 | Koehn, Radell W. And Austin Koehn & Morgan Koehn | Galva, KS 67443 | Oil Operator | Sep 2025 |
| 2513 | Koehn, Roger D. | Galva, KS 67443 | Oil Operator | Apr 1998 |
| 2514 | Kop-Mor Producti | | Oil Operator | Sep 1992 |
| 2515 | Kopco Inc | Caney, KS 67333 | Oil & Gas Operator | Oct 2025 |
| 2516 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 2517 | Kot, Inc. | Lost Springs, KS 66859 | Oil Operator | Aug 2016 |
| 2518 | Kottwitz Oil Co., A General Partnership | | Oil Operator | Jul 2019 |
| 2519 | KP Oil, LLC | | Oil & Gas Operator | Sep 2025 |
| 2520 | KPR Incorporated | | Oil & Gas Operator | Nov 1988 |
| 2521 | Kracken Operating LLC | Lawrence, KS 66047 | Oil Operator | Dec 2019 |
| 2522 | Kraft Oil Compan | | Oil Operator | Nov 1994 |
| 2523 | Kraft Oil Company LLC | Gridley, KS 66852 | Oil Operator | Sep 2025 |
| 2524 | Kraft, Jim - Oil Operations | Holyrood, KS 67450 | Oil Operator | Jan 1999 |
| 2525 | Kramer Oil Field Service Inc | Wellsville, KS 66092 | Oil Operator | May 2019 |
| 2526 | Kratzer Oil LLC | | Oil Operator | Sep 2025 |
| 2527 | Krehbiel Oil Co. | McPherson, KS 67460 | Oil & Gas Operator | Oct 1998 |
| 2528 | Krehbiel Oil Com | | Oil & Gas Operator | Mar 1995 |
| 2529 | Krehbiel, Brian | Burrton, KS 67020 | Gas Operator | Mar 2025 |
| 2530 | Krehbiel, Jay | | Oil Operator | Sep 2025 |
| 2531 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 2532 | Krier Kirby Oil | | Oil Operator | Dec 1996 |
| 2533 | Krier Oil Oper - | | Oil Operator | Sep 1995 |
| 2534 | Krier Oil Operation | | Oil Operator | Sep 2025 |
| 2535 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 2536 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 2537 | Kruckenberg & Scott | Isabel, KS 67065 | Oil Operator | Dec 2011 |
| 2538 | Krueger, A. H., Jr. | Hays, KS 67601 | Oil Operator | Jul 1993 |
| 2539 | Krug, Donald H | Russell, KS 67665 | Oil Operator | Aug 2025 |
| 2540 | KSC Oil | | Oil Operator | Aug 2025 |
| 2541 | Kuhn Walter Dril | | Gas Operator | Dec 1985 |
| 2542 | Kutter Oil Co. | Eureka, KS 67045 | Oil Operator | May 2002 |
| 2543 | Kutter Oil, Inc. | Eureka, KS 67045 | Oil Operator | Mar 2022 |
| 2544 | KWB Oil Property | | Oil Operator | Oct 1992 |
| 2545 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 2546 | Ky Oil Co | Palco, KS 67657 | Oil & Gas Operator | Aug 2000 |
| 2547 | Kykon Oil & Gas, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jun 2007 |
| 2548 | Kytex, Inc. | Wichita, KS 67230 | Oil Operator | Dec 2019 |
| 2549 | L & A Energy LP | | Oil Operator | Sep 2025 |
| 2550 | L & A Oil Compan | | Oil Operator | Sep 1991 |
| 2551 | L & B Crude, Inc. | Yates Center, KS 66783 | Oil Operator | Nov 2019 |
| 2552 | L & B Enterprise | | Gas Operator | Jul 1990 |
| 2553 | L & B Oil | Longton, KS 67352 | Oil Operator | Dec 2019 |
| 2554 | L & D Operation | Victoria, KS 67671 | Oil Operator | Jun 1988 |
| 2555 | L & F Oil Operat | | Oil Operator | Sep 1987 |
| 2556 | L & G Energy | | Oil & Gas Operator | Mar 1994 |
| 2557 | L & G Petroleum Operating, LLC | Havana, KS 67347 | Oil Operator | Sep 2025 |
| 2558 | L & H Energy Inc | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2019 |
| 2559 | L & J Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Apr 1999 |
| 2560 | L & J Oil Proper | | Oil Operator | Dec 1996 |
| 2561 | L & L Oil Compan | | Oil Operator | Oct 1984 |
| 2562 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 2563 | L & M Oil | | Oil Operator | Aug 2025 |
| 2564 | L & M Oil Co. | Yates Center, KS 66783 | Oil & Gas Operator | Dec 1998 |
| 2565 | L & M Oil Compan | | Oil & Gas Operator | Dec 1986 |
| 2566 | L & P Enterprises, LLC | Paola, KS 66071 | Oil Operator | Sep 2025 |
| 2567 | L & R Oil Company | Oakley, KS 67748 | Oil & Gas Operator | Jan 2004 |
| 2568 | L & R Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 2569 | L & S Resources | Independence, KS 67301 | Gas Operator | Dec 1996 |
| 2570 | L And J Oil Comp | | Oil Operator | Dec 1996 |
| 2571 | L B Industries Inc | Englewood, CO 80112 | Oil & Gas Operator | Jun 2003 |
| 2572 | L B Petroleum In | | Oil Operator | Nov 1995 |
| 2573 | L D O Incorporat | | Oil Operator | Jul 1988 |
| 2574 | L H Energy Incor | | Oil Operator | Dec 1991 |
| 2575 | L V Gas Incorpor | | Oil & Gas Operator | Mar 1991 |
| 2576 | L&DWG LLC | Copeland, KS 67837 | Gas Operator | Sep 2025 |
| 2577 | L&M, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Aug 2025 |
| 2578 | L-K Wireline, Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 2579 | L. B. Petroleum, Inc. | Denver, CO 80202 | Gas Operator | Jan 2016 |
| 2580 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 2581 | L.L. Oil Company | Freer, TX 78357 | Oil & Gas Operator | Feb 2026 |
| 2582 | La Veta Oil & Gas, LLC | Middleburg, VA 20118 | Oil Operator | Sep 2025 |
| 2583 | Lacen Oil | | Oil Operator | Jan 2002 |
| 2584 | Lachenmayr Oil C | | Oil Operator | Sep 1996 |
| 2585 | Lachenmayr Oil LLC | Newton, KS 67114 | Oil & Gas Operator | Sep 2025 |
| 2586 | Lackey Disposal | | Oil Operator | Jul 1994 |
| 2587 | Lackey Milton | | Oil & Gas Operator | Feb 1995 |
| 2588 | Lackey, Donna | Waxahachie, TX 75165 | Oil Operator | Oct 2019 |
| 2589 | Ladd Petroleum C | | Oil & Gas Operator | Sep 1989 |
| 2590 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 2591 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Feb 2026 |
| 2592 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Sep 2025 |
| 2593 | Lamoreaux Homes | | Oil & Gas Operator | Dec 1994 |
| 2594 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 2595 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 2596 | Landes Explorati | | Oil Operator | Apr 1995 |
| 2597 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 2598 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 2599 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 2600 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |