| 101 | Commonwealth Pet | | Oil & Gas Operator | Nov 1995 |
| 102 | Condor Energy | | Oil Operator | Aug 1995 |
| 103 | Condor Energy, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Oct 2021 |
| 104 | Connell, Mark Allen | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 105 | Coral Production Corporation | Denver, CO 80201 | Oil & Gas Operator | Sep 2025 |
| 106 | Culver & Grounds | | Oil & Gas Operator | Nov 1995 |
| 107 | Custom Oil Explo | | Oil & Gas Operator | May 1992 |
| 108 | Custom Service LLC | St John, KS 67576 | Oil Operator | Sep 2025 |
| 109 | D & G Oil Compan | | Oil Operator | Mar 1988 |
| 110 | D & W Oil Compan | | Oil Operator | Jan 1987 |
| 111 | D. R. Lauck Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jul 2019 |
| 112 | Dakota Resources | | Oil & Gas Operator | Jan 1989 |
| 113 | Damar Resources, Inc. | Hays, KS 67601 | Oil & Gas Operator | Aug 2025 |
| 114 | Darrah John J Jr | | Oil & Gas Operator | Oct 1994 |
| 115 | Darrah John Jay Jr | Wichita, KS 67201 | Oil & Gas Operator | Jan 2026 |
| 116 | Darrah Oil Company, LLC | Wichita, KS 67201 | Oil & Gas Operator | Feb 2026 |
| 117 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 118 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 119 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2025 |
| 120 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | Sep 2025 |
| 121 | Deutsch Oil Company | | Oil & Gas Operator | Sep 2025 |
| 122 | Dewayne'S Tank Service, Inc. | Saint John, KS 67576 | Oil Operator | Nov 2000 |
| 123 | Dixie Oil Incorp | | Oil Operator | Jul 1992 |
| 124 | Dixon Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Sep 2023 |
| 125 | Dixon Operating Company, LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 126 | Dominion Oil & Gas Corporation | Irving, TX 75039 | Oil & Gas Operator | Jun 2012 |
| 127 | Doonan And Sons, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2021 |
| 128 | Double 'B' Oil Co | | Oil Operator | Nov 2009 |
| 129 | Drake Exploration LLC | Arkansas City, KS 67005 | Oil & Gas Operator | Nov 2025 |
| 130 | Dreyer Oil | | Oil Operator | Dec 2019 |
| 131 | Dudrey Carl | | Oil & Gas Operator | Feb 1993 |
| 132 | Duke Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Feb 2006 |
| 133 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 134 | Eagle Exploratio | | Oil & Gas Operator | Oct 1991 |
| 135 | Eagle Petroleum | | Oil & Gas Operator | Nov 1995 |
| 136 | Eagle Petroleum, Inc. | Ellinwood, KS 67526 | Oil Operator | Sep 2025 |
| 137 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Nov 2025 |
| 138 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 139 | Edmiston Oil Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 140 | Edwards Oil Inco | | Oil Operator | Oct 1984 |
| 141 | Elevate Energy LTD | Aurora, CO 80016 | Oil & Gas Operator | Sep 2025 |
| 142 | Ellinwood Oil Reclaiming Inc | | Oil Operator | Oct 2009 |
| 143 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 144 | Emerson, Jim | Plano, TX 75074 | Oil & Gas Operator | Jan 1995 |
| 145 | Empire Energy E & P, LLC | Mayville, NY 14757 | Oil & Gas Operator | Mar 2019 |
| 146 | Encore Operating Company | Denver, CO 80227 | Oil & Gas Operator | Dec 2019 |
| 147 | Energy Reserves | | Oil & Gas Operator | Oct 1993 |
| 148 | Energy Three Inc. | Jackson, MS 39211 | Oil & Gas Operator | Sep 2025 |
| 149 | Evans Oil D W - | | Oil Operator | Mar 1992 |
| 150 | F & M Oil Compan | | Oil & Gas Operator | Feb 1993 |
| 151 | F.G. Holl Co., LLC | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 152 | Falcon Explorati | | Oil & Gas Operator | Apr 1995 |
| 153 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 154 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 155 | Farmer John O Inc | Russell, KS 67665 | Oil & Gas Operator | Sep 2025 |
| 156 | Flatlander Petroleum LLC | | Oil & Gas Operator | Sep 2025 |
| 157 | Fossil Resources LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 158 | Four Star Oil - | | Oil Operator | Dec 1987 |
| 159 | Four-Way Oper In | | Oil Operator | Aug 1994 |
| 160 | Four-Way Operating, Inc. | Great Bend, KS 67530 | Oil Operator | Sep 2013 |
| 161 | Frontier Oil Com | | Oil & Gas Operator | May 1995 |
| 162 | G L M Company | | Oil Operator | Sep 2025 |
| 163 | Galloway Drillin | | Oil Operator | Dec 1996 |
| 164 | Gas Marketing, Inc. | Stafford, KS 67578 | Oil Operator | Mar 2007 |
| 165 | Gee Oil Service LLC | Stafford, KS 67578 | Oil Operator | Feb 2013 |
| 166 | General Oil Comp | | Oil & Gas Operator | Nov 1993 |
| 167 | Giant Holding, LLC | Tucson, AZ 85713 | Oil & Gas Operator | Mar 2025 |
| 168 | Gilbert-Stewart Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 169 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2025 |
| 170 | Globe Exploratio | | Oil & Gas Operator | Jun 1995 |
| 171 | Globe Operating, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 172 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 173 | Gould Oil Incorp | | Oil & Gas Operator | May 1996 |
| 174 | Gra Ex, LLC | Kingman, KS 67068 | Oil & Gas Operator | Oct 2023 |
| 175 | Grady Bolding Corporation | Ellinwood, KS 67526 | Oil & Gas Operator | Sep 2025 |
| 176 | Graham-Michaelis | | Oil & Gas Operator | Nov 1996 |
| 177 | Grassland Petrol | | Oil Operator | Feb 1993 |
| 178 | Graves Drilling | | Oil & Gas Operator | Sep 1995 |
| 179 | Great Eastern En | | Oil & Gas Operator | Nov 1995 |
| 180 | Grey Oil Co | Pratt, KS 67124 | Oil & Gas Operator | Sep 2007 |
| 181 | Grey, Glenn E. | Haviland, KS 67059 | Oil Operator | Mar 2002 |
| 182 | Griffin, Charles | Stafford, KS 67578 | Oil Operator | Sep 1997 |
| 183 | Griffin, Charles N. | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 184 | Grunder Oil, LLC | St John, KS 67576 | Oil Operator | Sep 2025 |
| 185 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Sep 2025 |
| 186 | H & D Exploration LLC | Hoisington, KS 67544 | Oil & Gas Operator | Sep 2025 |
| 187 | H-30 Incorporate | | Oil & Gas Operator | Nov 1990 |
| 188 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 189 | Hallwood Petrole | | Oil & Gas Operator | Apr 1999 |
| 190 | Hallwood Petroleum | Denver, CO 80237 | Oil & Gas Operator | Dec 1997 |
| 191 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 192 | Harms Petroleum | | Oil & Gas Operator | May 1991 |
| 193 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 194 | Hellar Drilling | | Oil & Gas Operator | Jan 1994 |
| 195 | Hellar Drilling Company, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2009 |
| 196 | Helm Energy Company | Tulsa, OK 74133 | Oil Operator | Sep 2025 |
| 197 | Hembree Oil Production, LLC | Great Bend, KS 67530 | Oil Operator | Sep 2025 |
| 198 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Sep 2025 |
| 199 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Sep 2025 |
| 200 | Hesse Petroleum Co.,L.L.C. | Wichita, KS 67208 | Oil & Gas Operator | Sep 2025 |