| 15301 | K-3 Energy Corpo | | Oil Operator | May 1988 |
| 15302 | K-B Exploration Co. | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 15303 | K-B Oil Company | Dallas, TX 75243 | Oil & Gas Operator | Dec 2020 |
| 15304 | K-B Oil Company, LLC | Dallas, TX 75243 | Oil & Gas Operator | Jul 2025 |
| 15305 | K-Bar Oil LLC | McPherson, KS 67460 | Oil Operator | Mar 2025 |
| 15306 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 15307 | K-D Operations | N Richlnd HLS, TX 76182 | Oil Operator | Jul 2025 |
| 15308 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Jul 2025 |
| 15309 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 15310 | K-Von Enterprises Inc | Tecumseh, OK 74873 | Oil & Gas Operator | Jan 1994 |
| 15311 | K-W Oil - Evans | | Oil Operator | Jan 1994 |
| 15312 | K. C. Crude, Inc. | Lenexa, KS 66215 | Oil & Gas Operator | Dec 2000 |
| 15313 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 15314 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 15315 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Jul 2025 |
| 15316 | K. F. Operating Company | Burkburnett, TX 76354 | Oil & Gas Operator | Mar 2008 |
| 15317 | K. G. H. Enterprises | | Oil Operator | Dec 2003 |
| 15318 | K. J. Enterprises LLC | | Oil Operator | Dec 2001 |
| 15319 | K. O. C. Corporation | Sherman, TX 75091 | Oil & Gas Operator | Jul 2025 |
| 15320 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | May 2025 |
| 15321 | K. Stewart Petroleum Corporation | Oklahoma City, OK 73103 | Oil & Gas Operator | Jun 2001 |
| 15322 | K.A. Barnes Oil & Gas Oper, LLC | Somerset, TX 78069 | Oil Operator | Jul 2025 |
| 15323 | K.C. Development, Inc. | Marion, KS 66861 | Oil Operator | Mar 2009 |
| 15324 | K.C. Energy | Kansas City, MO 64111 | Oil Operator | Apr 1986 |
| 15325 | K.C. Operations | | Oil Operator | Mar 2025 |
| 15326 | K.E. Snyder Co., LLC | Hamilton, KS 66853 | Oil Operator | Mar 2025 |
| 15327 | K.J.S. Oil | | Oil & Gas Operator | Mar 2025 |
| 15328 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15329 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 15330 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15331 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15332 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Jul 2025 |
| 15333 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Apr 2025 |
| 15334 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Jul 2025 |
| 15335 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15336 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15337 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 15338 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15339 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15340 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15341 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15342 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15343 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15344 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15345 | Kadane & Sons | | Oil & Gas Operator | May 1978 |
| 15346 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jul 2025 |
| 15347 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15348 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 15349 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 15350 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 15351 | Kahlenberg Oil And Gas LLC | Conroe, TX 77304 | Oil Operator | Jul 2025 |
| 15352 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 15353 | Kaico Petroleum, L.L.C. | Argyle, TX 76226 | Oil Operator | Oct 2018 |
| 15354 | Kain Petroleum Company | Pearsall, TX 78061 | Gas Operator | May 2011 |
| 15355 | Kain Petroleum, LLC | Pearsall, TX 78061 | Oil & Gas Operator | Jul 2025 |
| 15356 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 15357 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 15358 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 15359 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Apr 2025 |
| 15360 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 15361 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15362 | Kaiser Operating, LLC | | Oil & Gas Operator | May 2025 |
| 15363 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15364 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15365 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2025 |
| 15366 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15367 | Kal Oil Operations | | Oil Operator | Mar 2025 |
| 15368 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Jul 2025 |
| 15369 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 15370 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Jul 2025 |
| 15371 | Kaler Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2024 |
| 15372 | Kalkaska Oilfield Services Inc | | Oil Operator | Aug 2006 |
| 15373 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 15374 | Kallina, Carlton J. | Houston, TX 77269 | Gas Operator | Jul 2025 |
| 15375 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Jul 2025 |
| 15376 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 15377 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | May 2025 |
| 15378 | Kamco Limited | Salt Lake City, UT 84105 | Oil Operator | Sep 2016 |
| 15379 | Kamlok Oil & Gas, Inc. | Houston, TX 77240 | Oil & Gas Operator | Jun 1996 |
| 15380 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 15381 | Kammer, Walter A. | Holland, NY 14080 | Gas Operator | Dec 2024 |
| 15382 | Kampresco Energy, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 15383 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 15384 | Kan-Tex Drilling Corp. | | Oil Operator | Dec 1981 |
| 15385 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 15386 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 15387 | Kanaco Oil Company | | Oil Operator | Dec 2019 |
| 15388 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |
| 15389 | Kanan Oil & Gas, Inc. | | Oil & Gas Operator | Oct 1987 |
| 15390 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | May 2025 |
| 15391 | Kaneb Energy Company | | Oil & Gas Operator | Jan 1986 |
| 15392 | Kaneb Oil & Gas | | Oil & Gas Operator | Oct 1987 |
| 15393 | Kaneb Oil & Gas Company | | Oil & Gas Operator | Nov 1985 |
| 15394 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 15395 | Kaneb Operg Co. LTD. PTN. | | Oil & Gas Operator | Aug 1988 |
| 15396 | Kanik, Anthony S Dba Kanik Oil Co | McLeansboro, IL 62859 | Oil Operator | Dec 2023 |
| 15397 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 15398 | Kano Partners | | Oil Operator | Sep 1989 |
| 15399 | Kanokla Oil & Gas Corporation | Wellington, KS 67152-0444 | Oil & Gas Operator | Apr 2025 |
| 15400 | Kanon Oil LLC | Cameron, TX 76520 | Oil Operator | Jun 2024 |