| 2401 | Kirkpatrick | Longton, KS 67352 | Oil Operator | Jun 2000 |
| 2402 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 2403 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 2404 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 2405 | Kiska Oil Compan | | Oil & Gas Operator | Oct 1989 |
| 2406 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 2407 | Kitchen, Robert (Deceased) | Osawatomie, KS 66064 | Oil Operator | Oct 2009 |
| 2408 | Kittle Oil | | Oil Operator | Apr 2025 |
| 2409 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 2410 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 2411 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Jun 2025 |
| 2412 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 2413 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 2414 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 2415 | Klenda, John | Marion, KS 66861 | Gas Operator | Dec 2023 |
| 2416 | Klima Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2417 | Klima Well Servi | | Oil Operator | Dec 1996 |
| 2418 | Klima Well Service, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 2419 | Klippel, B.W., Jr. | Wichita, KS 67220 | Oil Operator | May 1999 |
| 2420 | KLM Exploration Company, Inc. | McLouth, KS 66054 | Oil Operator | Dec 2019 |
| 2421 | KLM Oil Operations, Inc. | El Dorado, KS 67042 | Oil Operator | Apr 1998 |
| 2422 | KLM Operating | | Oil & Gas Operator | Mar 2025 |
| 2423 | KLMKH Inc | Charlotte, NC 28270 | Oil Operator | Jun 2025 |
| 2424 | Kloberdanz Paul | | Gas Operator | Apr 1991 |
| 2425 | Kloberdanz Paul E | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 2426 | Klondike Investments, Inc. | Paola, KS 66071 | Oil Operator | Sep 2011 |
| 2427 | KN Production Company | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2003 |
| 2428 | Knife River Oil, LLC | Bull Shoals, AR 72619 | Oil Operator | Feb 2017 |
| 2429 | Knight Oil Company | Victoria, KS 67671 | Gas Operator | Jun 2025 |
| 2430 | Knight, Joeann | Kilgore, TX 75662 | Oil Operator | Sep 1989 |
| 2431 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 2432 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 2433 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |
| 2434 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Apr 2003 |
| 2435 | Kodiak Energy LLC | Pineville, MO 64856 | Oil Operator | Dec 2019 |
| 2436 | Kodiak Oil Co. | Stockton, MO 65785 | Oil Operator | May 1996 |
| 2437 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Jun 2025 |
| 2438 | Koehn Alfred D | | Oil & Gas Operator | Sep 1994 |
| 2439 | Koehn Eldon R | | Oil Operator | Dec 2009 |
| 2440 | Koehn Radell W | | Oil Operator | Dec 2009 |
| 2441 | Koehn, Alfred D.(Deceased) | Galva, KS 67443 | Oil Operator | Mar 1998 |
| 2442 | Koehn, Carolyn | Galva, KS 67443 | Oil Operator | Jun 2025 |
| 2443 | Koehn, John W. | Sublette, KS 67877 | Gas Operator | May 2018 |
| 2444 | Koehn, Max R. | Copeland, KS 67837 | Oil & Gas Operator | Oct 2019 |
| 2445 | Koehn, Radell W. And Austin Koehn & Morgan Koehn | Galva, KS 67443 | Oil Operator | Jun 2025 |
| 2446 | Koehn, Roger D. | Galva, KS 67443 | Oil Operator | Apr 1998 |
| 2447 | Kop-Mor Producti | | Oil Operator | Sep 1992 |
| 2448 | Kopco Inc | Caney, KS 67333 | Oil & Gas Operator | Sep 2025 |
| 2449 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 2450 | Kot, Inc. | Lost Springs, KS 66859 | Oil Operator | Aug 2016 |
| 2451 | Kottwitz Oil Co., A General Partnership | | Oil Operator | Jul 2019 |
| 2452 | KP Oil, LLC | | Oil & Gas Operator | Jun 2025 |
| 2453 | KPR Incorporated | | Oil & Gas Operator | Nov 1988 |
| 2454 | Kracken Operating LLC | Lawrence, KS 66047 | Oil Operator | Dec 2019 |
| 2455 | Kraft Oil Compan | | Oil Operator | Nov 1994 |
| 2456 | Kraft Oil Company LLC | Gridley, KS 66852 | Oil Operator | Jun 2025 |
| 2457 | Kraft, Jim - Oil Operations | Holyrood, KS 67450 | Oil Operator | Jan 1999 |
| 2458 | Kramer Oil Field Service Inc | Wellsville, KS 66092 | Oil Operator | May 2019 |
| 2459 | Kratzer Oil LLC | | Oil Operator | Jun 2025 |
| 2460 | Krehbiel Oil Co. | McPherson, KS 67460 | Oil & Gas Operator | Oct 1998 |
| 2461 | Krehbiel Oil Com | | Oil & Gas Operator | Mar 1995 |
| 2462 | Krehbiel, Brian | Burrton, KS 67020 | Gas Operator | Mar 2025 |
| 2463 | Krehbiel, Jay | | Oil Operator | Jun 2025 |
| 2464 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 2465 | Krier Kirby Oil | | Oil Operator | Dec 1996 |
| 2466 | Krier Oil Oper - | | Oil Operator | Sep 1995 |
| 2467 | Krier Oil Operation | | Oil Operator | May 2025 |
| 2468 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Jun 2025 |
| 2469 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 2470 | Kruckenberg & Scott | Isabel, KS 67065 | Oil Operator | Dec 2011 |
| 2471 | Krueger, A. H., Jr. | Hays, KS 67601 | Oil Operator | Jul 1993 |
| 2472 | Krug, Donald H | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 2473 | KSC Oil | | Oil Operator | May 2025 |
| 2474 | Kuhn Walter Dril | | Gas Operator | Dec 1985 |
| 2475 | Kutter Oil Co. | Eureka, KS 67045 | Oil Operator | May 2002 |
| 2476 | Kutter Oil, Inc. | Eureka, KS 67045 | Oil Operator | Mar 2022 |
| 2477 | KWB Oil Property | | Oil Operator | Oct 1992 |
| 2478 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 2479 | Ky Oil Co | Palco, KS 67657 | Oil & Gas Operator | Aug 2000 |
| 2480 | Kykon Oil & Gas, Inc. | Billings, MT 59103 | Oil & Gas Operator | Jun 2007 |
| 2481 | Kytex, Inc. | Wichita, KS 67230 | Oil Operator | Dec 2019 |
| 2482 | L & A Energy LP | | Oil Operator | Jun 2025 |
| 2483 | L & A Oil Compan | | Oil Operator | Sep 1991 |
| 2484 | L & B Crude, Inc. | Yates Center, KS 66783 | Oil Operator | Nov 2019 |
| 2485 | L & B Enterprise | | Gas Operator | Jul 1990 |
| 2486 | L & B Oil | Longton, KS 67352 | Oil Operator | Dec 2019 |
| 2487 | L & D Operation | Victoria, KS 67671 | Oil Operator | Jun 1988 |
| 2488 | L & F Oil Operat | | Oil Operator | Sep 1987 |
| 2489 | L & G Energy | | Oil & Gas Operator | Mar 1994 |
| 2490 | L & G Petroleum Operating, LLC | Havana, KS 67347 | Oil Operator | Jun 2025 |
| 2491 | L & H Energy Inc | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2019 |
| 2492 | L & J Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Apr 1999 |
| 2493 | L & J Oil Proper | | Oil Operator | Dec 1996 |
| 2494 | L & L Oil Compan | | Oil Operator | Oct 1984 |
| 2495 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 2496 | L & M Oil | | Oil Operator | May 2025 |
| 2497 | L & M Oil Co. | Yates Center, KS 66783 | Oil & Gas Operator | Dec 1998 |
| 2498 | L & M Oil Compan | | Oil & Gas Operator | Dec 1986 |
| 2499 | L & P Enterprises, LLC | Paola, KS 66071 | Oil Operator | Jun 2025 |
| 2500 | L & R Oil Company | Oakley, KS 67748 | Oil & Gas Operator | Jan 2004 |