| 2301 | Kansons Oil Co. | | Oil Operator | Jan 2014 |
| 2302 | Kantor Oil Compa | | Oil Operator | Aug 1994 |
| 2303 | Kantor Oil Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 2304 | Karbank, Barney | Kansas City, MO 64199 | Oil Operator | Sep 2001 |
| 2305 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 2306 | Karst Brothers Oil Co, A General Partnership | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 2307 | Karst Don Well S | | Oil Operator | Oct 1990 |
| 2308 | Karst, Elmer L | Russell, KS 67665 | Oil Operator | Feb 1990 |
| 2309 | Katana Resources | | Oil & Gas Operator | Aug 1984 |
| 2310 | Kato Operating C | | Oil Operator | Aug 1988 |
| 2311 | Katz Joe Oil Acc | | Oil Operator | Oct 1995 |
| 2312 | Kay Dee Oil | | Oil Operator | Mar 2025 |
| 2313 | KB Oil & Gas | | Oil & Gas Operator | Apr 2025 |
| 2314 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 2315 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Apr 2025 |
| 2316 | Keen Oil Co | | Oil & Gas Operator | Mar 2025 |
| 2317 | Keener Oil Compa | | Oil & Gas Operator | Jul 1988 |
| 2318 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 2319 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 2320 | Keller Heirs Oil | | Oil Operator | Aug 2024 |
| 2321 | Kelley Edgar Oil & Gas Operations | | Gas Operator | Nov 2015 |
| 2322 | Kelly Company LC | Lenexa, KS 67215 | Oil & Gas Operator | Mar 2025 |
| 2323 | Kelso Casing Pul | | Oil Operator | Mar 1995 |
| 2324 | Kelso, Mike Oil | Chase, KS 67524 | Oil Operator | Oct 2013 |
| 2325 | Kelt Energy Inco | | Oil & Gas Operator | Sep 1995 |
| 2326 | Kelt Energy, Inc. | Independence, KS 67301 | Oil & Gas Operator | Dec 2003 |
| 2327 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Jul 2025 |
| 2328 | Kema Oil Company, Inc. | Lebo, KS 66856 | Oil Operator | Mar 2025 |
| 2329 | Kenbill Oil Comp | | Oil Operator | Jun 1994 |
| 2330 | Kenneco Incorpor | | Oil Operator | Sep 1984 |
| 2331 | Kennedy & Mitche | | Oil & Gas Operator | May 1990 |
| 2332 | Kenneth & Regina Laymon, LLC | Neosho Falls, KS 66758 | Oil Operator | Dec 2019 |
| 2333 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2025 |
| 2334 | Kenny Brown Enterprises LLC | Hays, KS 67601 | Oil Operator | Jul 2013 |
| 2335 | Kent, Cameron J | Garnett, KS 66032 | Oil Operator | Mar 2025 |
| 2336 | Kent, VInce J | Garnett, KS 66032 | Oil Operator | Oct 2002 |
| 2337 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 2338 | Kephart Drilling, Inc. | Thayer, KS 66776 | Oil & Gas Operator | Dec 2008 |
| 2339 | Kepley Brothers | Chanute, KS 66720 | Oil Operator | Sep 1992 |
| 2340 | Kepley Well Service, LLC | Chanute, KS 66720 | Oil Operator | Mar 2025 |
| 2341 | Kepley, L.F. | Wichita, KS 67204 | Oil Operator | Feb 1986 |
| 2342 | Kepley, William Samuel | Chanute, KS 66720 | Oil Operator | Nov 2024 |
| 2343 | Kera-Oil | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2344 | Kern Co. | Houston, TX 77095 | Oil & Gas Operator | Jan 2021 |
| 2345 | Kernodle Bros. Oil & Gas, General Partnership | Raytown, MO 64133 | Oil Operator | Jun 2018 |
| 2346 | Kerr Oil, LLC | Iola, KS 66749 | Oil Operator | Dec 2009 |
| 2347 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 2348 | Kewanee Oil Comp | | Oil & Gas Operator | Nov 1996 |
| 2349 | Key Gas Corp. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2018 |
| 2350 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 2351 | Keys Gerald W Oi | | Oil Operator | Mar 1993 |
| 2352 | Keys, Gerald Oil Production & Explor. | Humboldt, KS 66748 | Oil Operator | Mar 1999 |
| 2353 | Keyse, Ralph L. | Lane, KS 66042 | Oil Operator | Jul 2018 |
| 2354 | Keystone Oil Co. | Eureka, KS 67045 | Oil Operator | May 2000 |
| 2355 | KG Oil Co | | Oil Operator | Mar 2025 |
| 2356 | Kilby, M. T. | Yates Center, KS 66783 | Oil Operator | Sep 1986 |
| 2357 | Kimbark Oil & Ga | | Oil & Gas Operator | Aug 1992 |
| 2358 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 2359 | Kimzey Drilling | | Oil Operator | Nov 2009 |
| 2360 | Kinderhook Oil & | | Oil Operator | Dec 1993 |
| 2361 | Kindervag Robert | | Oil Operator | Jun 1991 |
| 2362 | King Daniel L | | Oil Operator | May 1994 |
| 2363 | King Energy Co. | | Oil Operator | Nov 2019 |
| 2364 | King Energy Comp | | Oil Operator | Dec 1996 |
| 2365 | King Oil Operations, LLC | Ellis, KS 67637 | Oil Operator | Mar 2025 |
| 2366 | King Oil, Inc. | Jetmore, KS 67854 | Oil Operator | Mar 2025 |
| 2367 | King'S Well Service LLC | Blackwell, OK 74631 | Oil Operator | Mar 2025 |
| 2368 | Kingsbury Petrol | | Oil Operator | Jul 1986 |
| 2369 | Kinney Oil Company | Denver, CO 80202 | Oil Operator | Dec 2024 |
| 2370 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 2371 | Kiowa Producers, LLC | Parsons, KS 67357 | Oil & Gas Operator | Jan 2025 |
| 2372 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 2373 | Kirkpatrick | Longton, KS 67352 | Oil Operator | Jun 2000 |
| 2374 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 2375 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Mar 2025 |
| 2376 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 2377 | Kiska Oil Compan | | Oil & Gas Operator | Oct 1989 |
| 2378 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 2379 | Kitchen, Robert (Deceased) | Osawatomie, KS 66064 | Oil Operator | Oct 2009 |
| 2380 | Kittle Oil | | Oil Operator | Jan 2025 |
| 2381 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 2382 | Kiwanda Resc Inc | | Oil & Gas Operator | Aug 1993 |
| 2383 | Kizzar Well Servicing, Inc. | Chase, KS 67524 | Oil Operator | Mar 2025 |
| 2384 | Kjellin, Charles Willard (Deceased) | Marion, KS 66861 | Oil & Gas Operator | Oct 2013 |
| 2385 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 2386 | KLB Operating, Inc. | Plainville, KS 67663 | Oil Operator | Aug 2001 |
| 2387 | Klenda, John | Marion, KS 66861 | Gas Operator | Dec 2023 |
| 2388 | Klima Oil, Inc. | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 2389 | Klima Well Servi | | Oil Operator | Dec 1996 |
| 2390 | Klima Well Service, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2025 |
| 2391 | Klippel, B.W., Jr. | Wichita, KS 67220 | Oil Operator | May 1999 |
| 2392 | KLM Exploration Company, Inc. | McLouth, KS 66054 | Oil Operator | Dec 2019 |
| 2393 | KLM Oil Operations, Inc. | El Dorado, KS 67042 | Oil Operator | Apr 1998 |
| 2394 | KLM Operating | | Oil & Gas Operator | Mar 2025 |
| 2395 | KLMKH Inc | Charlotte, NC 28270 | Oil Operator | Jan 2025 |
| 2396 | Kloberdanz Paul | | Gas Operator | Apr 1991 |
| 2397 | Kloberdanz, Paul E. | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 2398 | Klondike Investments, Inc. | Paola, KS 66071 | Oil Operator | Sep 2011 |
| 2399 | KN Production Co. | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2003 |
| 2400 | Knife River Oil, LLC | Bull Shoals, AR 72619 | Oil Operator | Feb 2017 |