| 2401 | Katana Resources | | Oil & Gas Operator | Aug 1984 |
| 2402 | Kato Operating C | | Oil Operator | Aug 1988 |
| 2403 | Katz Joe Oil Acc | | Oil Operator | Oct 1995 |
| 2404 | Kauffman Don L | | Gas Operator | Aug 1991 |
| 2405 | Kay Dee Oil | | Oil Operator | Sep 2025 |
| 2406 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 2407 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Oct 2025 |
| 2408 | Keen Oil Co | | Oil & Gas Operator | Aug 2025 |
| 2409 | Keener Oil Compa | | Oil & Gas Operator | Jul 1988 |
| 2410 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 2411 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2025 |
| 2412 | Keller Heirs Oil | | Oil Operator | May 2025 |
| 2413 | Kelley Edgar Oil & Gas Operations | | Gas Operator | Nov 2015 |
| 2414 | Kelly Company LC | Lenexa, KS 67215 | Oil & Gas Operator | Sep 2025 |
| 2415 | Kelso Casing Pul | | Oil Operator | Mar 1995 |
| 2416 | Kelso, Mike Oil | Chase, KS 67524 | Oil Operator | Oct 2013 |
| 2417 | Kelt Energy Inco | | Oil & Gas Operator | Sep 1995 |
| 2418 | Kelt Energy, Inc. | Independence, KS 67301 | Oil & Gas Operator | Dec 2003 |
| 2419 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Feb 2026 |
| 2420 | Kema Oil Company, Inc. | Lebo, KS 66856 | Oil Operator | Sep 2025 |
| 2421 | Kenbill Oil Comp | | Oil Operator | Jun 1994 |
| 2422 | Kenneco Incorpor | | Oil Operator | Sep 1984 |
| 2423 | Kennedy & Mitche | | Oil & Gas Operator | May 1990 |
| 2424 | Kenneth & Regina Laymon, LLC | Neosho Falls, KS 66758 | Oil Operator | Dec 2019 |
| 2425 | Kenneth W Cory LTD | Bellaire, TX 77401 | Oil & Gas Operator | Nov 2025 |
| 2426 | Kenny Brown Enterprises LLC | Hays, KS 67601 | Oil Operator | Jul 2013 |
| 2427 | Kent, Cameron J | Garnett, KS 66032 | Oil Operator | Aug 2025 |
| 2428 | Kent, VInce J | Garnett, KS 66032 | Oil Operator | Oct 2002 |
| 2429 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 2430 | Kephart Drilling | | Gas Operator | Aug 1991 |
| 2431 | Kephart Drilling, Inc. | Thayer, KS 66776 | Oil & Gas Operator | Dec 2008 |
| 2432 | Kephart Gas Production, A General Partnership | Thayer, KS 66776 | Gas Operator | Aug 2004 |
| 2433 | Kepley Brothers | Chanute, KS 66720 | Oil Operator | Sep 1992 |
| 2434 | Kepley Well Service, LLC | Chanute, KS 66720 | Oil Operator | Mar 2025 |
| 2435 | Kepley, L.F. | Wichita, KS 67204 | Oil Operator | Feb 1986 |
| 2436 | Kepley, William Samuel | Chanute, KS 66720 | Oil Operator | Nov 2024 |
| 2437 | Kera-Oil | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2438 | Kern Co. | Houston, TX 77095 | Oil & Gas Operator | Jan 2021 |
| 2439 | Kernodle Bros. Oil & Gas, General Partnership | Raytown, MO 64133 | Oil Operator | Jun 2018 |
| 2440 | Kerr Oil, LLC | Iola, KS 66749 | Oil Operator | Dec 2009 |
| 2441 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 2442 | Kewanee Oil Comp | | Oil & Gas Operator | Nov 1996 |
| 2443 | Key Gas Corp. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2018 |
| 2444 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Nov 2025 |
| 2445 | Keys Gerald W Oi | | Oil Operator | Mar 1993 |
| 2446 | Keys, Gerald Oil Production & Explor. | Humboldt, KS 66748 | Oil Operator | Mar 1999 |
| 2447 | Keyse, Ralph L. | Lane, KS 66042 | Oil Operator | Jul 2018 |
| 2448 | Keystone Oil Co. | Eureka, KS 67045 | Oil Operator | May 2000 |
| 2449 | KG Oil Co | | Oil Operator | Aug 2025 |
| 2450 | Kilby Oil Producer | Wichita, KS 67210 | Gas Operator | Sep 1997 |
| 2451 | Kilby, M. T. | Yates Center, KS 66783 | Oil Operator | Sep 1986 |
| 2452 | Kimbark Oil & Ga | | Oil & Gas Operator | Aug 1992 |
| 2453 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 2454 | Kimzey Drilling | | Oil Operator | Nov 2009 |
| 2455 | Kinderhook Oil & | | Oil Operator | Dec 1993 |
| 2456 | Kindervag Robert | | Oil Operator | Jun 1991 |
| 2457 | King Daniel L | | Oil Operator | May 1994 |
| 2458 | King Energy Co. | | Oil Operator | Nov 2019 |
| 2459 | King Energy Comp | | Oil Operator | Dec 1996 |
| 2460 | King Oil Operations, LLC | Ellis, KS 67637 | Oil Operator | Sep 2025 |
| 2461 | King Oil, Inc. | Jetmore, KS 67854 | Oil Operator | Sep 2025 |
| 2462 | King'S Well Service LLC | Blackwell, OK 74631 | Oil Operator | Sep 2025 |
| 2463 | Kingsbury Petrol | | Oil Operator | Jul 1986 |
| 2464 | Kinney Oil Company | Denver, CO 80202 | Oil Operator | Dec 2024 |
| 2465 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 2466 | Kiowa Producers, LLC | Parsons, KS 67357 | Oil & Gas Operator | Jan 2025 |
| 2467 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 2468 | Kirkpatrick | Longton, KS 67352 | Oil Operator | Jun 2000 |
| 2469 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 2470 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 2471 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 2472 | Kiska Oil Compan | | Oil & Gas Operator | Oct 1989 |
| 2473 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 2474 | Kitchen, Robert (Deceased) | Osawatomie, KS 66064 | Oil Operator | Oct 2009 |
| 2475 | Kittle Oil | | Oil Operator | Apr 2025 |
| 2476 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 2477 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 2478 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Sep 2025 |
| 2479 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 2480 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 2481 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 2482 | Klenda, John | Marion, KS 66861 | Gas Operator | Dec 2023 |
| 2483 | Klima Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2484 | Klima Well Servi | | Oil Operator | Dec 1996 |
| 2485 | Klima Well Service, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Sep 2025 |
| 2486 | Klippel, B.W., Jr. | Wichita, KS 67220 | Oil Operator | May 1999 |
| 2487 | KLM Exploration Company, Inc. | McLouth, KS 66054 | Oil Operator | Dec 2019 |
| 2488 | KLM Oil Operations, Inc. | El Dorado, KS 67042 | Oil Operator | Apr 1998 |
| 2489 | KLM Operating | | Oil & Gas Operator | Mar 2025 |
| 2490 | KLMKH Inc | Charlotte, NC 28270 | Oil Operator | Sep 2025 |
| 2491 | Kloberdanz Paul | | Gas Operator | Apr 1991 |
| 2492 | Kloberdanz Paul E | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 2493 | Klondike Investments, Inc. | Paola, KS 66071 | Oil Operator | Sep 2011 |
| 2494 | KN Production Company | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2003 |
| 2495 | Knife River Oil, LLC | Bull Shoals, AR 72619 | Oil Operator | Feb 2017 |
| 2496 | Knight Oil Company | Victoria, KS 67671 | Gas Operator | Sep 2025 |
| 2497 | Knight, Joeann | Kilgore, TX 75662 | Oil Operator | Sep 1989 |
| 2498 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 2499 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 2500 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |