| 15301 | K And R Operating | Kingsbury, TX 78638 | Oil & Gas Operator | Mar 2026 |
| 15302 | K C Crude Inc | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15303 | K C Crude Incorp | | Oil & Gas Operator | Mar 1994 |
| 15304 | K C Development | | Oil & Gas Operator | Dec 1996 |
| 15305 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 15306 | K C S Michigan Resources Inc | | Oil & Gas Operator | Mar 2004 |
| 15307 | K Cubed Resources, L.L.C. | Burleson, TX 76028 | Oil & Gas Operator | Mar 2026 |
| 15308 | K D S Resources Co | Thomas, OK 73669 | Oil & Gas Operator | Dec 2025 |
| 15309 | K Energy Inc | Mannford, OK 74044-3023 | Oil & Gas Operator | May 2013 |
| 15310 | K Explorations | | Gas Operator | May 1984 |
| 15311 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 15312 | K L Production Services LLC | Duncan, OK 73533-3409 | Oil & Gas Operator | Nov 2019 |
| 15313 | K M X Corporation Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 15314 | K Me Company, LLC | Kilgore, TX 75663 | Oil Operator | Mar 2026 |
| 15315 | K N Energy Inc | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2000 |
| 15316 | K N Processing | | Gas Operator | Mar 1999 |
| 15317 | K O G Production LLC | Freedom, OK 73842 | Oil & Gas Operator | Jan 2026 |
| 15318 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Mar 2026 |
| 15319 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Jan 2026 |
| 15320 | K Phil Fleetwood Oil Properties LLC | Marlow, OK 73055 | Oil & Gas Operator | Jan 2026 |
| 15321 | K R M Petroleum | | Oil & Gas Operator | Jan 1990 |
| 15322 | K R S Expl., Inc. | | Oil Operator | Oct 2020 |
| 15323 | K R Well Technology, LLC | Dimmitt, TX 79027 | Oil Operator | Mar 2026 |
| 15324 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Dec 2025 |
| 15325 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Jan 2026 |
| 15326 | K Spencer LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 15327 | K W Drilling, Inc. | Topeka, KS 66617 | Gas Operator | Sep 1991 |
| 15328 | K W Oil Well Service. Inc. | Chanute, KS 66720 | Oil Operator | Apr 2017 |
| 15329 | K Wilson Enterprises Inc. | | Oil Operator | Jan 2025 |
| 15330 | K&C Pump Truck, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2018 |
| 15331 | K&M LLC | | Oil Operator | Aug 2025 |
| 15332 | K&M Resources LLC | Artesia, NM 88211 | Oil & Gas Operator | Dec 2025 |
| 15333 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15334 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Mar 2026 |
| 15335 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15336 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Mar 2026 |
| 15337 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Sep 2025 |
| 15338 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15339 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Mar 2026 |
| 15340 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2026 |
| 15341 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15342 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15343 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15344 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15345 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15346 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Mar 2026 |
| 15347 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15348 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15349 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15350 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Mar 2026 |
| 15351 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Dec 2025 |
| 15352 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15353 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Mar 2026 |
| 15354 | K.B. Oil & Gas | | Oil & Gas Operator | Dec 2025 |
| 15355 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15356 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15357 | K.C. Operations | | Oil Operator | Aug 2025 |
| 15358 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Sep 2025 |
| 15359 | K.J.S. Oil | | Oil & Gas Operator | Sep 2025 |
| 15360 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15361 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2026 |
| 15362 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15363 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15364 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Mar 2026 |
| 15365 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Dec 2025 |
| 15366 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Mar 2026 |
| 15367 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15368 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15369 | Ka-Lyn Oil & Gas Inc. | | Oil & Gas Operator | Jul 1990 |
| 15370 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15371 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15372 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15373 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15374 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15375 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15376 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15377 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 15378 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Mar 2026 |
| 15379 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15380 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 15381 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2026 |
| 15382 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 15383 | Kahlenberg Oil And Gas LLC | Conroe, TX 77304 | Oil Operator | Mar 2026 |
| 15384 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 15385 | Kain Petroleum Company | Pearsall, TX 78061 | Gas Operator | May 2011 |
| 15386 | Kain Petroleum, LLC | Pearsall, TX 78061 | Oil & Gas Operator | Mar 2026 |
| 15387 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 15388 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 15389 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 15390 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Dec 2025 |
| 15391 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 15392 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15393 | Kaiser Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 15394 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15395 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15396 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2026 |
| 15397 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15398 | Kal Oil Operations | | Oil Operator | Jun 2025 |
| 15399 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Mar 2026 |
| 15400 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |