| 2301 | John R Thompson Operating, Inc | | Oil & Gas Operator | Apr 1985 |
| 2302 | John T. Martin, Jr. | | Oil Operator | Jun 1992 |
| 2303 | John T. Palmer | | Oil & Gas Operator | Jun 1982 |
| 2304 | John T. Weaver & Son | | Oil Operator | Jan 2024 |
| 2305 | John W. McDowell | | Oil & Gas Operator | Aug 1991 |
| 2306 | John W. McGowan | | Oil & Gas Operator | Jun 1991 |
| 2307 | John W. Mecom | | Oil & Gas Operator | Mar 1991 |
| 2308 | John W. Thomas | | Oil & Gas Operator | Jun 1993 |
| 2309 | John W. Thomas, Jr. | | Oil Operator | Jun 1993 |
| 2310 | Johnson & Johnson Operating, Inc. | | Oil & Gas Operator | Dec 2023 |
| 2311 | Johnson Oil & Gas Corporation | | Oil & Gas Operator | Feb 1994 |
| 2312 | Johnson'S Well Service | | Oil Operator | Jan 2004 |
| 2313 | Jolen Operating Co Of La. | | Oil & Gas Operator | Dec 1993 |
| 2314 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 2315 | Jones Company | | Oil & Gas Operator | Dec 1990 |
| 2316 | Jones Company, LTD. | Albany, TX 76430 | Oil & Gas Operator | May 1999 |
| 2317 | Jones Exploration Company | | Oil & Gas Operator | Jun 1985 |
| 2318 | Jones Oil Company | Ardmore, OK 73402-1389 | Oil & Gas Operator | Aug 2022 |
| 2319 | Jones Operating Company | Levelland, TX 79336 | Oil & Gas Operator | Oct 2000 |
| 2320 | Jones-O'Brien, Inc. | | Oil & Gas Operator | Feb 1982 |
| 2321 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 2322 | Jordan Oil Company, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2019 |
| 2323 | Joseph C. Leckelt | | Oil Operator | Jul 1995 |
| 2324 | Joseph F. Fritz Operating Co. | | Oil & Gas Operator | Mar 1983 |
| 2325 | Josey Exploration, Inc. | | Oil & Gas Operator | Dec 1988 |
| 2326 | JPM Petroleum, Inc. | | Oil Operator | May 1986 |
| 2327 | JSB, LLC | | Oil & Gas Operator | Jan 2024 |
| 2328 | Julil Energy, LLC | Richmond, TX 77406 | Oil & Gas Operator | Apr 2024 |
| 2329 | June Energy Inc. | | Oil & Gas Operator | May 2000 |
| 2330 | Jurassic Exploration Co Inc. | | Oil & Gas Operator | Nov 1994 |
| 2331 | Justiss Oil Co., Inc.-Munoco Co. | | Oil & Gas Operator | Dec 2008 |
| 2332 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Dec 2023 |
| 2333 | Justiss-Mears Oil Co. | | Oil & Gas Operator | Feb 1981 |
| 2334 | Justiss-Mears Oil Co., Et Al | | Oil & Gas Operator | Feb 1981 |
| 2335 | Justiss-Mears-D. Latimer | | Oil Operator | Mar 1979 |
| 2336 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 2337 | JWR Exploration Inc. | | Oil & Gas Operator | Jul 1989 |
| 2338 | JWR Oil And Gas | | Oil Operator | Dec 2023 |
| 2339 | JZJ Corporation | | Oil Operator | May 2010 |
| 2340 | K & G Production | | Oil Operator | Jan 2024 |
| 2341 | K & S Rentals | | Oil & Gas Operator | May 2013 |
| 2342 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 2343 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 2344 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 2345 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2024 |
| 2346 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 2347 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 2348 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 2349 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 2350 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 2351 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 2352 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 2353 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 2354 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 2355 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 2356 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 2357 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 2358 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 2359 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Apr 2024 |
| 2360 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 2361 | Kanan Oil & Gas, Inc. | | Oil & Gas Operator | Oct 1987 |
| 2362 | Kaneb Energy Company | | Oil & Gas Operator | Jan 1986 |
| 2363 | Kaneb Oil & Gas Company | | Oil & Gas Operator | Nov 1985 |
| 2364 | Kaneb Operg Co. LTD. PTN. | | Oil & Gas Operator | Aug 1988 |
| 2365 | Kanpetro, Inc. | | Oil Operator | May 1991 |
| 2366 | Kansas Oil & Gas Corporation | Woodland HLS, CA 91367 | Oil & Gas Operator | Feb 2001 |
| 2367 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Apr 2024 |
| 2368 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 2369 | Kauthar Energy Co., Inc. | | Oil & Gas Operator | Dec 2002 |
| 2370 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 2371 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 2372 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 2373 | KCS Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 2374 | Keba Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2015 |
| 2375 | Kecco, Inc. | | Oil Operator | May 2002 |
| 2376 | Keck Partners | | Oil & Gas Operator | Apr 1989 |
| 2377 | Kedco Management Corp | | Oil & Gas Operator | Jul 1985 |
| 2378 | Keith W. Burton | | Oil & Gas Operator | Jan 2024 |
| 2379 | Kele Exploration, Inc. | | Oil & Gas Operator | Apr 1990 |
| 2380 | Kelley Oil Corp/Yuma Petroleum | | Gas Operator | Jun 1994 |
| 2381 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 2382 | Kelley Operating Company, LTD. | | Oil & Gas Operator | Aug 2003 |
| 2383 | Kelly Bayou Production | | Oil & Gas Operator | Jan 2024 |
| 2384 | Kelly H. Baxter | Austin, TX 78767 | Oil & Gas Operator | Nov 2006 |
| 2385 | Kelly Oil Company | | Oil & Gas Operator | Sep 2013 |
| 2386 | Kem Ventures, LP | Katy, TX 77450 | Oil & Gas Operator | Jan 2024 |
| 2387 | Kenergy Petroleum Corp | | Oil & Gas Operator | Dec 1982 |
| 2388 | Kenergy-Wainoco | | Oil & Gas Operator | Mar 1981 |
| 2389 | Kennedy And Bacheller | | Oil & Gas Operator | Apr 1989 |
| 2390 | Kenneth Darnell | | Oil Operator | Dec 2023 |
| 2391 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2023 |
| 2392 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 2393 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 2394 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 2395 | Kerr-McGee Oil & Gas Onshr LLC | | Oil & Gas Operator | Dec 2005 |
| 2396 | Kerr-McGee Rocky Mountain Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2007 |
| 2397 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 2398 | Kewanee Oil Company | Houston, TX 77001 | Oil & Gas Operator | Aug 1978 |
| 2399 | Key Energy Of Colorado, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2016 |
| 2400 | Key Energy Services, Inc.Altd | | Oil Operator | Dec 2006 |