| 2401 | Knight Oil Company | Victoria, KS 67671 | Gas Operator | Mar 2025 |
| 2402 | Knight, Joeann | Kilgore, TX 75662 | Oil Operator | Sep 1989 |
| 2403 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 2404 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 2405 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |
| 2406 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 2407 | Kodiak Energy LLC | Pineville, MO 64856 | Oil Operator | Dec 2019 |
| 2408 | Kodiak Oil Co. | Stockton, MO 65785 | Oil Operator | May 1996 |
| 2409 | Kodiak Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Mar 2025 |
| 2410 | Koehn Alfred D | | Oil & Gas Operator | Sep 1994 |
| 2411 | Koehn Eldon R | | Oil Operator | Dec 2009 |
| 2412 | Koehn Radell W | | Oil Operator | Dec 2009 |
| 2413 | Koehn, Alfred D.(Deceased) | Galva, KS 67443 | Oil Operator | Mar 1998 |
| 2414 | Koehn, Carolyn | Galva, KS 67443 | Oil Operator | Mar 2025 |
| 2415 | Koehn, John W. | Sublette, KS 67877 | Gas Operator | May 2018 |
| 2416 | Koehn, Max R. | Copeland, KS 67837 | Oil & Gas Operator | Oct 2019 |
| 2417 | Koehn, Radell W. And Austin Koehn & Morgan Koehn | Galva, KS 67443 | Oil Operator | Mar 2025 |
| 2418 | Koehn, Roger D. | Galva, KS 67443 | Oil Operator | Apr 1998 |
| 2419 | Kop-Mor Producti | | Oil Operator | Sep 1992 |
| 2420 | Kopco, Inc. | Caney, KS 67333 | Oil & Gas Operator | May 2025 |
| 2421 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 2422 | Kot, Inc. | Lost Springs, KS 66859 | Oil Operator | Aug 2016 |
| 2423 | Kottwitz Oil Co., A General Partnership | | Oil Operator | Jul 2019 |
| 2424 | KP Oil, LLC | | Oil Operator | Jan 2025 |
| 2425 | Kracken Operating LLC | Lawrence, KS 66047 | Oil Operator | Dec 2019 |
| 2426 | Kraft Oil Compan | | Oil Operator | Nov 1994 |
| 2427 | Kraft Oil Company LLC | Gridley, KS 66852 | Oil Operator | Mar 2025 |
| 2428 | Kraft, Jim - Oil Operations | Holyrood, KS 67450 | Oil Operator | Jan 1999 |
| 2429 | Kramer Oil Field Service Inc | Wellsville, KS 66092 | Oil Operator | May 2019 |
| 2430 | Kratzer Oil LLC | | Oil Operator | Jan 2025 |
| 2431 | Krehbiel Oil Co. | McPherson, KS 67460 | Oil & Gas Operator | Oct 1998 |
| 2432 | Krehbiel Oil Com | | Oil & Gas Operator | Mar 1995 |
| 2433 | Krehbiel, Brian | Burrton, KS 67020 | Gas Operator | Mar 2025 |
| 2434 | Krehbiel, Jay | | Oil Operator | Mar 2025 |
| 2435 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 2436 | Krier Kirby Oil | | Oil Operator | Dec 1996 |
| 2437 | Krier Oil Oper - | | Oil Operator | Sep 1995 |
| 2438 | Krier Oil Operation | | Oil Operator | Feb 2025 |
| 2439 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Mar 2025 |
| 2440 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 2441 | Kruckenberg & Scott | Isabel, KS 67065 | Oil Operator | Dec 2011 |
| 2442 | Krueger, A. H., Jr. | Hays, KS 67601 | Oil Operator | Jul 1993 |
| 2443 | Krug, Donald H | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 2444 | KSC Oil | | Oil Operator | Feb 2025 |
| 2445 | Kuhn Walter Dril | | Gas Operator | Dec 1985 |
| 2446 | Kutter Oil Co. | Eureka, KS 67045 | Oil Operator | May 2002 |
| 2447 | Kutter Oil, Inc. | Eureka, KS 67045 | Oil Operator | Mar 2022 |
| 2448 | KWB Oil Property | | Oil Operator | Oct 1992 |
| 2449 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 2450 | Ky Oil Co | Palco, KS 67657 | Oil & Gas Operator | Aug 2000 |
| 2451 | Kykon Oil & Gas, Inc. | Billings, MT 59103 | Oil & Gas Operator | Feb 2009 |
| 2452 | Kytex, Inc. | Wichita, KS 67230 | Oil Operator | Dec 2019 |
| 2453 | L & A Energy LP | | Oil Operator | Mar 2025 |
| 2454 | L & A Oil Compan | | Oil Operator | Sep 1991 |
| 2455 | L & B Crude, Inc. | Yates Center, KS 66783 | Oil Operator | Nov 2019 |
| 2456 | L & B Enterprise | | Gas Operator | Jul 1990 |
| 2457 | L & B Oil | Longton, KS 67352 | Oil Operator | Dec 2019 |
| 2458 | L & D Operation | Victoria, KS 67671 | Oil Operator | Jun 1988 |
| 2459 | L & F Oil Operat | | Oil Operator | Sep 1987 |
| 2460 | L & G Energy | | Oil & Gas Operator | Mar 1994 |
| 2461 | L & G Petroleum Operating, LLC | Havana, KS 67347 | Oil Operator | Mar 2025 |
| 2462 | L & H Energy Inc | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2019 |
| 2463 | L & J Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Apr 1999 |
| 2464 | L & J Oil Proper | | Oil Operator | Dec 1996 |
| 2465 | L & L Oil Compan | | Oil Operator | Oct 1984 |
| 2466 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 2467 | L & M Oil | | Oil Operator | Feb 2025 |
| 2468 | L & M Oil Co. | Yates Center, KS 66783 | Oil & Gas Operator | Dec 1998 |
| 2469 | L & M Oil Compan | | Oil & Gas Operator | Dec 1986 |
| 2470 | L & P Enterprises, LLC | Paola, KS 66071 | Oil Operator | Mar 2025 |
| 2471 | L & R Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Mar 2025 |
| 2472 | L And J Oil Comp | | Oil Operator | Dec 1996 |
| 2473 | L And R Oil Company | Oakley, KS 67748 | Oil & Gas Operator | Jan 2004 |
| 2474 | L B Exploration Inc | Wichita, KS 67205 | Oil & Gas Operator | Jun 2025 |
| 2475 | L B Industries Inc | Englewood, CO 80112 | Oil & Gas Operator | Jun 2003 |
| 2476 | L B Petroleum In | | Oil Operator | Nov 1995 |
| 2477 | L D O Incorporat | | Oil Operator | Jul 1988 |
| 2478 | L H Energy Incor | | Oil Operator | Dec 1991 |
| 2479 | L V Gas Incorpor | | Oil & Gas Operator | Mar 1991 |
| 2480 | L&DWG LLC | Copeland, KS 67837 | Gas Operator | Mar 2025 |
| 2481 | L&M, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Dec 2024 |
| 2482 | L-K Wireline, Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 2483 | L. B. Petroleum, Inc. | Denver, CO 80202 | Gas Operator | Jan 2016 |
| 2484 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Mar 2025 |
| 2485 | L.L. Oil Company | Freer, TX 78357 | Oil & Gas Operator | Jul 2025 |
| 2486 | La Veta Oil & Gas, LLC | Middleburg, VA 20118 | Oil Operator | Mar 2025 |
| 2487 | Lacen Oil | | Oil Operator | Jan 2002 |
| 2488 | Lachenmayr Oil C | | Oil Operator | Sep 1996 |
| 2489 | Lachenmayr Oil LLC | Newton, KS 67114 | Oil & Gas Operator | Mar 2025 |
| 2490 | Lackey Disposal | | Oil Operator | Jul 1994 |
| 2491 | Lackey Milton | | Oil & Gas Operator | Feb 1995 |
| 2492 | Lackey, Donna | Waxahachie, TX 75165 | Oil Operator | Oct 2019 |
| 2493 | Ladd Petroleum C | | Oil & Gas Operator | Sep 1989 |
| 2494 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 2495 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Jul 2025 |
| 2496 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Oct 2024 |
| 2497 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 2498 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 2499 | Landes Explorati | | Oil Operator | Apr 1995 |
| 2500 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |