| 15101 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 15102 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15103 | Kaiser Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 15104 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15105 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15106 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Sep 2026 |
| 15107 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15108 | Kal Oil Operations | | Oil Operator | Apr 2026 |
| 15109 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Sep 2026 |
| 15110 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 15111 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Sep 2026 |
| 15112 | Kaler Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2024 |
| 15113 | Kalkaska Oilfield Services Inc | | Oil Operator | Aug 2006 |
| 15114 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Jun 2026 |
| 15115 | Kallina, Carlton J. | Houston, TX 77269 | Gas Operator | Sep 2026 |
| 15116 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Sep 2026 |
| 15117 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 15118 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Jul 2026 |
| 15119 | Kamco Limited | Salt Lake City, UT 84105 | Oil Operator | Sep 2016 |
| 15120 | Kamlok Oil & Gas, Inc. | Houston, TX 77240 | Oil & Gas Operator | Jun 1996 |
| 15121 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 15122 | Kammer, Walter A. | Holland, NY 14080 | Gas Operator | Dec 2025 |
| 15123 | Kampresco Energy, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 15124 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 15125 | Kan-Tex Drilling Corp. | | Oil Operator | Dec 1981 |
| 15126 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 15127 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 15128 | Kanaco Oil Company | | Oil Operator | Apr 2025 |
| 15129 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |
| 15130 | Kanan Oil & Gas, Inc. | | Oil & Gas Operator | Oct 1987 |
| 15131 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Jul 2026 |
| 15132 | Kaneb Energy Company | | Oil & Gas Operator | Jan 1986 |
| 15133 | Kaneb Oil & Gas | | Oil & Gas Operator | Oct 1987 |
| 15134 | Kaneb Oil & Gas Company | | Oil & Gas Operator | Nov 1985 |
| 15135 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 15136 | Kaneb Operg Co. LTD. PTN. | | Oil & Gas Operator | Aug 1988 |
| 15137 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 15138 | Kano Partners | | Oil Operator | Sep 1989 |
| 15139 | Kanokla Oil & Gas Corporation | Wellington, KS 67152-0444 | Oil & Gas Operator | Jun 2026 |
| 15140 | Kanpetro, Inc. | | Oil Operator | May 1991 |
| 15141 | Kansas Bourse In | | Oil & Gas Operator | Apr 1985 |
| 15142 | Kansas City Oil, LLC | Parkville, MO 64152 | Oil Operator | May 2026 |
| 15143 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | May 2026 |
| 15144 | Kansas Crude Oil | | Oil Operator | Dec 1987 |
| 15145 | Kansas Crude Resources, LLC | | Oil Operator | May 2026 |
| 15146 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 15147 | Kansas Energy Company, L.L.C. | Sedan, KS 67361 | Oil & Gas Operator | May 2026 |
| 15148 | Kansas Gas Co., Inc. | Wichita Falls, TX 76310 | Gas Operator | May 2026 |
| 15149 | Kansas Gas Purchasing | Salina, KS 67401 | Oil & Gas Operator | May 1995 |
| 15150 | Kansas Gas Service | | Oil Operator | Nov 1996 |
| 15151 | Kansas Gas Suppl | | Gas Operator | Sep 1984 |
| 15152 | Kansas Horizon O | | Oil & Gas Operator | Jun 1994 |
| 15153 | Kansas Horizon Oil, Inc. | Windom, KS 67491 | Oil Operator | May 2017 |
| 15154 | Kansas Ka-Tex Joint Venture, A General Partnership | San Antonio, TX 78216 | Gas Operator | Aug 2011 |
| 15155 | Kansas MB Project, LLC | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2026 |
| 15156 | Kansas Natural G | | Oil & Gas Operator | Dec 1996 |
| 15157 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | May 2026 |
| 15158 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | May 2026 |
| 15159 | Kansas Oil & Gas Corporation | Woodland HLS, CA 91367 | Oil & Gas Operator | Feb 2001 |
| 15160 | Kansas Oil Company | Kansas City, KS 66117 | Oil Operator | May 1997 |
| 15161 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 15162 | Kansas Oil, Inc. | Chanute, KS 66720 | Oil Operator | Dec 2009 |
| 15163 | Kansas Oil, LLC | | Oil Operator | May 2026 |
| 15164 | Kansas Petroleum | | Oil & Gas Operator | Dec 1993 |
| 15165 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 15166 | Kansas Power & L | | Oil Operator | Mar 1982 |
| 15167 | Kansas Renewable Resources, LLC | Great Bend, KS 67530 | Oil Operator | May 2026 |
| 15168 | Kansas Resource Exploration & Development, LLC | Overland Park, KS 66202 | Oil Operator | May 2026 |
| 15169 | Kansas Resource Exploration And Development | | Oil Operator | Apr 2022 |
| 15170 | Kansons Oil Co. | | Oil Operator | Jan 2014 |
| 15171 | Kant Walter F | Lance Creek, WY 82222 | Oil & Gas Operator | Dec 2002 |
| 15172 | Kantek Tank Service, LLC | | Oil Operator | May 2026 |
| 15173 | Kantor Oil Compa | | Oil Operator | Aug 1994 |
| 15174 | Kantor Oil Company LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 15175 | Kar Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2026 |
| 15176 | Kara Enterprises Inc | Upton, WY 82730 | Oil Operator | Jul 2013 |
| 15177 | Karbank, Barney | Kansas City, MO 64199 | Oil Operator | Sep 2001 |
| 15178 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Sep 2026 |
| 15179 | Kardaleff Steven T | Lawton, OK 73507-8471 | Oil Operator | Mar 2015 |
| 15180 | Karen D. Mott & Mark D. Covert | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2025 |
| 15181 | Karenco Energy, Incorporated | Seguin, TX 78155 | Oil & Gas Operator | Oct 1997 |
| 15182 | Karico GP, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 15183 | Karis Resources, LLC | Tyler, TX 75707 | Oil & Gas Operator | Feb 2019 |
| 15184 | Karlton Terry Oil Company | | Oil Operator | Jan 1991 |
| 15185 | Karper Company, The | Graham, TX 76450 | Oil & Gas Operator | Feb 2003 |
| 15186 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 15187 | Karst Brothers Oil Co, A General Partnership | Russell, KS 67665 | Oil Operator | May 2026 |
| 15188 | Karst Don Well S | | Oil Operator | Oct 1990 |
| 15189 | Karst Incorporated | Fort Worth, TX 76116 | Oil Operator | Sep 2026 |
| 15190 | Karst, Elmer L | Russell, KS 67665 | Oil Operator | Feb 1990 |
| 15191 | Karsted Operating, LLC | Billings, MT 59102 | Oil Operator | May 2026 |
| 15192 | Kas Productions | La Veta, CO 81055 | Oil Operator | Mar 2008 |
| 15193 | Kasan Corp. | Pharr, TX 78577 | Oil & Gas Operator | Sep 1995 |
| 15194 | Kase Energy LLC | Roseville, MN 55113 | Oil Operator | Aug 2006 |
| 15195 | Kash Oil And Gas, Inc | | Oil & Gas Operator | Oct 2020 |
| 15196 | Kash Operating LLC | Maljamar, NM 88264 | Oil Operator | Oct 2024 |
| 15197 | Kasle Energy Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2017 |
| 15198 | Kasperski Oil Corp | | Oil & Gas Operator | May 2002 |
| 15199 | Kastle Resources Enterprises Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 15200 | Kastman Oil Company | Lubbock, TX 79408 | Oil & Gas Operator | Nov 2012 |