| 101 | Devonian Oil Company | Lawrence, KS 66044 | Oil Operator | May 2001 |
| 102 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 103 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 104 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Mar 2026 |
| 105 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Mar 2026 |
| 106 | Doug'S Pumping Service | | Oil Operator | Mar 2026 |
| 107 | Drop Tine Exploration, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2019 |
| 108 | Eagle Creek Resources, LLC | Sewickley, PA 15143 | Oil & Gas Operator | Dec 2025 |
| 109 | Eagle Exploratio | | Oil & Gas Operator | Oct 1991 |
| 110 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Mar 2026 |
| 111 | Edmiston Oil Com | | Oil & Gas Operator | May 1994 |
| 112 | Edmiston Oil Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 113 | Edwards Oil Inco | | Oil Operator | Oct 1984 |
| 114 | Elendil Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Jul 2026 |
| 115 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Mar 2026 |
| 116 | End Of The Trails Re | | Oil Operator | Mar 2026 |
| 117 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 118 | Energy Sources I | | Oil & Gas Operator | Jul 1986 |
| 119 | Energyquest II, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2026 |
| 120 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 121 | Evolution Oil & | | Oil & Gas Operator | Apr 1993 |
| 122 | Exok Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 123 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Apr 2026 |
| 124 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 125 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 126 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 127 | Fancher Oil Co. | | Oil & Gas Operator | Sep 1995 |
| 128 | Fancher Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 129 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 130 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Mar 2026 |
| 131 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 132 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 133 | Ferguson Orval L | | Oil & Gas Operator | Oct 1983 |
| 134 | Fina Oil & Chemi | | Oil & Gas Operator | Oct 1995 |
| 135 | Flatlander Petroleum LLC | | Oil & Gas Operator | Mar 2026 |
| 136 | Gas Producing En | | Oil & Gas Operator | Nov 1983 |
| 137 | Getty Oil Compan | | Oil & Gas Operator | Jun 1992 |
| 138 | Gore Oil Company | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 139 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 140 | Gould Oil Incorp | | Oil & Gas Operator | May 1996 |
| 141 | Graves Drilling | | Oil & Gas Operator | Sep 1995 |
| 142 | Graves Drilling Co., Inc. | Wichita, KS 67208 | Oil & Gas Operator | Mar 2026 |
| 143 | Graybol-Patton C | | Oil & Gas Operator | Oct 1991 |
| 144 | Great Eastern En | | Oil & Gas Operator | Nov 1995 |
| 145 | Great Eastern Energy & Dev. Corp. | Midland, TX 79701 | Oil & Gas Operator | Jul 2008 |
| 146 | Grey Oil Co | Pratt, KS 67124 | Oil & Gas Operator | Sep 2007 |
| 147 | Grey, Glenn E. | Haviland, KS 67059 | Oil Operator | Mar 2002 |
| 148 | Gunner Oil Company | Wichita, KS 67205 | Oil & Gas Operator | Mar 2026 |
| 149 | H-30 Incorporate | | Oil & Gas Operator | Nov 1990 |
| 150 | H-40 Oil & Gas Inc | Medicine Lodge, KS 67104 | Oil Operator | Feb 2026 |
| 151 | H3 Oil & Gas | | Oil & Gas Operator | Mar 2026 |
| 152 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 153 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 154 | Hawkins Oil & Ga | | Oil & Gas Operator | Jun 1995 |
| 155 | Hawkins Oil & Gas Company | Richardson, TX 75080 | Oil & Gas Operator | Jul 2026 |
| 156 | Hayes Oil & Gas LLC | Attica, KS 67009 | Oil & Gas Operator | Mar 2026 |
| 157 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Mar 2026 |
| 158 | HG Oil Holdings, LLC | Hoisington, KS 67544 | Oil & Gas Operator | Mar 2026 |
| 159 | Hinkle Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 160 | Hoffman Resources LLC | Hoisington, KS 67544 | Oil & Gas Operator | Mar 2026 |
| 161 | Horizon Oil & Ga | | Oil & Gas Operator | Jan 1992 |
| 162 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 163 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 164 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Feb 2026 |
| 165 | Iep Kansas Gas, LLC | Burlington, CO 80807 | Oil & Gas Operator | May 2026 |
| 166 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 167 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jul 2026 |
| 168 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Mar 2026 |
| 169 | Jack Exploration Inc | Sulphur, OK 73086 | Oil & Gas Operator | Oct 2017 |
| 170 | Jacobs, Gary D. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2016 |
| 171 | James B. Read Operating, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2026 |
| 172 | JHL Energy, Inc. | Wichita, KS 67209 | Oil & Gas Operator | Apr 2016 |
| 173 | Jody Oil & Gas Corporation | Attica, KS 67009 | Oil & Gas Operator | Mar 2026 |
| 174 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 175 | Jones G R Oil & | | Oil & Gas Operator | Nov 1993 |
| 176 | Jordan Oil Management Inc. | Haysville, KS 67060 | Oil & Gas Operator | Mar 2026 |
| 177 | K & E Drilling I | | Oil & Gas Operator | Sep 1995 |
| 178 | K & E Drilling, Inc | Wichita, KS 67202 | Oil & Gas Operator | Mar 2026 |
| 179 | K C Resources In | | Oil & Gas Operator | Oct 1993 |
| 180 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 181 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 182 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 183 | Kansas Petroleum, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jul 2007 |
| 184 | KBW Oil & Gas Co | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2024 |
| 185 | Kewanee Oil Comp | | Oil & Gas Operator | Nov 1996 |
| 186 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 187 | Knight Oil Company | Victoria, KS 67671 | Gas Operator | Mar 2026 |
| 188 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 189 | Kopco Inc | Caney, KS 67333 | Oil & Gas Operator | Oct 2025 |
| 190 | KP Oil, LLC | | Oil & Gas Operator | Mar 2026 |
| 191 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 192 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 193 | L & J Oil Proper | | Oil Operator | Dec 1996 |
| 194 | Lachenmayr Oil LLC | Newton, KS 67114 | Oil & Gas Operator | Mar 2026 |
| 195 | Ladd Petroleum C | | Oil & Gas Operator | Sep 1989 |
| 196 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 197 | Lario Oil & Gas | | Oil & Gas Operator | Nov 1995 |
| 198 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Jul 2026 |
| 199 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 200 | Lasso Energy LLC | Chase, KS 67524 | Oil & Gas Operator | Mar 2026 |