| 101 | Keystone Gas Corporation | Drumright, OK 7403O | Oil & Gas Operator | Apr 2015 |
| 102 | Keystone Oil And Gas Company LLC | | Oil & Gas Operator | Jan 2024 |
| 103 | Keystone Production Company | Duncan, OK 73533-9117 | Oil & Gas Operator | May 2005 |
| 104 | Kibtec Oil & Gas Inc | Guthrie, OK 73044-1215 | Oil & Gas Operator | Nov 2023 |
| 105 | Kickapoo Oil Co | Baton Rouge, LA 70815 | Gas Operator | Feb 1994 |
| 106 | Kidd Bill R | Bristow, OK 74010-9721 | Oil Operator | Jan 2013 |
| 107 | Kidd Oil & Gas, LC | Dallas, TX 75219 | Oil & Gas Operator | Apr 1999 |
| 108 | Kiefer Oil And Gas Co Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Apr 2011 |
| 109 | Kienzle John A | Shawnee, OK 74802-1265 | Oil & Gas Operator | Aug 2013 |
| 110 | Kiester Operating Company | Oklahoma City, OK 73101-0705 | Oil & Gas Operator | Feb 2024 |
| 111 | Kile Production | Cypress, TX 77410 | Oil & Gas Operator | Aug 2014 |
| 112 | Kim Ray Oil & Gas | Ada, OK 74821-0474 | Oil & Gas Operator | Dec 2023 |
| 113 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 114 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 115 | Kimco Oil And Gas | Wewoka, OK 74884-0613 | Oil & Gas Operator | Jul 2016 |
| 116 | Kimraco Oil Inc | Pawnee, OK 74058-2869 | Oil & Gas Operator | Apr 2016 |
| 117 | King Energy LLC | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Feb 2024 |
| 118 | King Jerry L | Wann, OK 74083-9727 | Oil & Gas Operator | Oct 2019 |
| 119 | King Operating Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2024 |
| 120 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2024 |
| 121 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 122 | Kingfisher Resources Inc | Clinton, OK 73601-1237 | Oil & Gas Operator | Feb 2024 |
| 123 | Kingman Petroleum Inc | Dolores, CO 81323-9503 | Oil & Gas Operator | Mar 2023 |
| 124 | Kiowa Gas Company | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 125 | Kirby Exploration Co | Houston, TX 77251 | Oil & Gas Operator | Jan 2014 |
| 126 | Kirk Billie E | Morris, OK 74445-0146 | Oil & Gas Operator | Dec 2023 |
| 127 | Kirk David | Midland, TX 79705-7433 | Oil & Gas Operator | Jan 2024 |
| 128 | Kirk Tank Trucks Inc | Morris, OK 74445-4832 | Oil & Gas Operator | Dec 2021 |
| 129 | Kirkpatrick Oil Company | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2024 |
| 130 | Kirkpatrick W E | Ponca City, OK 74604-4146 | Gas Operator | Oct 2001 |
| 131 | Kirrie Oil Company LLC | Oklahoma City, OK 73113-0125 | Oil & Gas Operator | Nov 2016 |
| 132 | Kiska Oil Company | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2019 |
| 133 | KJB Oil Company LLC | Dewey, OK 74029-3053 | Oil Operator | Dec 2023 |
| 134 | KJR Services LLC | | Oil & Gas Operator | Dec 2023 |
| 135 | Klabzuba Brothers LLC | Prague, OK 74864-0567 | Oil & Gas Operator | Jul 2007 |
| 136 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 137 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 138 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 139 | KLBW Partners LLC | Ratliff City, OK 73481-0088 | Oil & Gas Operator | Jan 2024 |
| 140 | Kleen Oilfield Services Co | Velma, OK 73491-0178 | Oil & Gas Operator | Nov 2023 |
| 141 | Klinger Energy Inc | Ponca City, OK 74601-7812 | Oil & Gas Operator | Oct 2019 |
| 142 | Klinger Shirley | Ponca City, OK 74601-7812 | Oil & Gas Operator | Jan 2024 |
| 143 | KLM Oil & Gas Company | Tonganoxie, KS 66086 | Oil & Gas Operator | Apr 2014 |
| 144 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2024 |
| 145 | Kloberdanz, Paul E. | Oklahoma City, OK 73157 | Oil & Gas Operator | Aug 2021 |
| 146 | Klotzman, M. S. Exploration Co. | Victoria, TX 77903 | Oil & Gas Operator | May 2024 |
| 147 | KN Production Co. | Lakewood, CO 80228 | Oil & Gas Operator | Jun 2003 |
| 148 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 149 | Knife Oil Company Inc | Cushing, OK 74023-1347 | Oil & Gas Operator | Aug 2000 |
| 150 | Knight Energy Inc | | Oil Operator | Feb 2024 |
| 151 | Knutson Production Company | Loco, OK 73442-9706 | Oil & Gas Operator | Feb 2024 |
| 152 | Koby Oil Company LLC | Oklahoma City, OK 73101-1945 | Oil & Gas Operator | Jan 2024 |
| 153 | Koch Hydrocarbon Company | Wichita, KS 67220-3203 | Oil & Gas Operator | Nov 2014 |
| 154 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 155 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 156 | Koda Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 157 | Kodiak Oil & Gas Exploration Inc | | Oil & Gas Operator | Jan 2024 |
| 158 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | May 2024 |
| 159 | Koelsch Rex Or Marie | Tulsa, OK 74107-8647 | Oil & Gas Operator | May 2023 |
| 160 | Kolar Petroleum Inc | Oklahoma City, OK 73162-1509 | Oil & Gas Operator | Jun 2007 |
| 161 | Kopco, Inc. | Caney, KS 67333 | Oil & Gas Operator | Jan 2024 |
| 162 | Kornblit, Majir | | Oil Operator | Nov 1998 |
| 163 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 164 | KPL Production Company LLC | Oklahoma City, OK 73112-4709 | Oil & Gas Operator | Feb 2017 |
| 165 | Kraker Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 1995 |
| 166 | Krebbs A N & Kay | Pawhuska, OK 74056 | Oil Operator | Jan 2024 |
| 167 | Krebbs, David B | | Oil & Gas Operator | Jan 2024 |
| 168 | Krotzer Oil Company | Cleveland, OK 74020-0383 | Oil & Gas Operator | Feb 2024 |
| 169 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |
| 170 | Krumme Oil Company LLP | Bristow, OK 74010-0749 | Oil & Gas Operator | Jan 2024 |
| 171 | Krumme Wesley J | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 1997 |
| 172 | KSW Operating LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 173 | KT Energy Inc | Enid, OK 73702-2365 | Oil & Gas Operator | Jan 2024 |
| 174 | KT Investments Inc | Englewood, FL 34223 | Oil & Gas Operator | Feb 2024 |
| 175 | KTP Energy, Inc. | Denver, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 176 | Kuran Resources Inc | | Oil Operator | Jul 2021 |
| 177 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 178 | Ky Oil Co | Palco, KS 67657 | Oil & Gas Operator | Aug 2000 |
| 179 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 180 | Kyler Oil Company | Pawhuska, OK 74056-0117 | Oil Operator | Nov 1998 |