| 101 | Greenwood Resources L.L.C. | Pratt, KS 67124 | Oil Operator | Feb 2026 |
| 102 | Grey Oil Co | Pratt, KS 67124 | Oil & Gas Operator | Sep 2007 |
| 103 | Griffin, Charles N. | Pratt, KS 67124 | Oil & Gas Operator | Feb 2026 |
| 104 | Grunder Oil, LLC | St John, KS 67576 | Oil Operator | Feb 2026 |
| 105 | Gunner Oil Company | Wichita, KS 67205 | Oil & Gas Operator | Feb 2026 |
| 106 | H & W Oil Corpor | | Oil Operator | Dec 1996 |
| 107 | H3 Oil & Gas | | Oil & Gas Operator | Feb 2026 |
| 108 | Hacker, Jack | Coats, KS 67028 | Oil & Gas Operator | Nov 2025 |
| 109 | Halliburton Oil | | Oil & Gas Operator | Sep 2008 |
| 110 | Hellar Drilling | | Oil & Gas Operator | Jan 1994 |
| 111 | Hellar Drilling Company, Inc. | Wichita, KS 67208 | Oil & Gas Operator | Jan 2009 |
| 112 | Herman L. Loeb LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Feb 2026 |
| 113 | Hess Oil Company | McPherson, KS 67460 | Oil & Gas Operator | Feb 2026 |
| 114 | Hilliker Oil Com | | Oil Operator | Jul 1984 |
| 115 | Hilliker Production | Indian Wells, CA 92210 | Oil & Gas Operator | Jul 2007 |
| 116 | Hinkle Oil Compa | | Oil & Gas Operator | Nov 1994 |
| 117 | Hirt Farms Incor | | Oil & Gas Operator | Apr 1994 |
| 118 | Hoener Ross Inco | | Oil Operator | Dec 1991 |
| 119 | Hoener, Ross | Iuka, KS 67066 | Oil & Gas Operator | Feb 2026 |
| 120 | Houston Hydrolan | | Oil Operator | Jul 1984 |
| 121 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 122 | Hummon Corp | Medicine Lodge, KS 67104 | Oil & Gas Operator | Feb 2026 |
| 123 | Hupfer Operating, Inc. | Shawnee, KS 66203 | Oil & Gas Operator | Dec 2019 |
| 124 | Imperial Oil & G | | Gas Operator | Jan 1990 |
| 125 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 126 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2026 |
| 127 | Isern, James R. | Wichita, KS 67277 | Oil Operator | Apr 1996 |
| 128 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Feb 2026 |
| 129 | J & M Water Serv | | Oil Operator | Sep 1992 |
| 130 | J B Gas Detectors, Inc. | Pratt, KS 67124 | Oil Operator | Oct 1994 |
| 131 | JHS Energy, Inc | Denver, CO 80222 | Oil & Gas Operator | Feb 2026 |
| 132 | John O. Farmer, Inc. | | Oil & Gas Operator | Dec 1996 |
| 133 | Jones And Buck Development LLC | Sedan, KS 67361 | Oil & Gas Operator | Mar 2026 |
| 134 | Jones Oil, LLC | St John, KS 67576 | Oil & Gas Operator | Feb 2026 |
| 135 | Jordan Oil Management Inc. | Haysville, KS 67060 | Oil & Gas Operator | Feb 2026 |
| 136 | K & N Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Feb 2026 |
| 137 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Mar 2026 |
| 138 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 139 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 140 | Kansas Gas Service | | Oil Operator | Nov 1996 |
| 141 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |
| 142 | Kansas Petroleum | | Oil & Gas Operator | Dec 1993 |
| 143 | Kansas Power & L | | Oil Operator | Mar 1982 |
| 144 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Feb 2026 |
| 145 | Kelly Company LC | Lenexa, KS 67215 | Oil & Gas Operator | Feb 2026 |
| 146 | Kelso, Mike Oil | Chase, KS 67524 | Oil Operator | Oct 2013 |
| 147 | Kimbark Oil & Ga | | Oil & Gas Operator | Aug 1992 |
| 148 | Kimbark Oil & Gas Company | Denver, CO 80203 | Oil & Gas Operator | May 2007 |
| 149 | Kirkman W L Inco | | Oil & Gas Operator | Dec 1994 |
| 150 | Kirkpatrick Properties LLC | Ellinwood, KS 67526 | Oil Operator | Feb 2026 |
| 151 | Kiwanda Energy, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jan 2008 |
| 152 | KLM Operating | | Oil & Gas Operator | Mar 2025 |
| 153 | Knighton Oil Com | | Oil & Gas Operator | Nov 1996 |
| 154 | Knighton Oil Company, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 155 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |
| 156 | L & J Oil Proper | | Oil Operator | Dec 1996 |
| 157 | L & M Oil Co. | Yates Center, KS 66783 | Oil & Gas Operator | Dec 1998 |
| 158 | L & M Oil Compan | | Oil & Gas Operator | Dec 1986 |
| 159 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2026 |
| 160 | Lachenmayr Oil LLC | Newton, KS 67114 | Oil & Gas Operator | Feb 2026 |
| 161 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 162 | Lansing Energy C | | Oil Operator | Jun 2006 |
| 163 | Lansing Energy Operations | Wichita, KS 67202 | Oil Operator | Apr 2010 |
| 164 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 165 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 166 | Lasso Energy LLC | Chase, KS 67524 | Oil & Gas Operator | Feb 2026 |
| 167 | Lauck D R Oil Co | | Oil & Gas Operator | Oct 1995 |
| 168 | Leasing & Development, Inc. | Wichita, KS 67202 | Oil Operator | Jun 2022 |
| 169 | Leben Drilling I | | Oil & Gas Operator | Dec 1988 |
| 170 | Leben Oil Corpor | | Oil & Gas Operator | Apr 1991 |
| 171 | Leben Theodore I | | Oil & Gas Operator | Dec 1995 |
| 172 | Little Neil Oil | | Oil Operator | Jul 1994 |
| 173 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 174 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Feb 2026 |
| 175 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 176 | M S Drilling Company | | Oil Operator | Jan 2026 |
| 177 | Mad Operators LLC | | Oil & Gas Operator | Feb 2026 |
| 178 | Magnum Oil & Gas | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2000 |
| 179 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 180 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 181 | Marathon Oil Com | | Oil & Gas Operator | Dec 1996 |
| 182 | Marmac Petroleum | | Oil & Gas Operator | Oct 1994 |
| 183 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 184 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 185 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 186 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 187 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 188 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Feb 2026 |
| 189 | Mica Energy Corp | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 190 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 191 | Moff Oil Company | Pratt, KS 67124 | Gas Operator | Apr 1988 |
| 192 | Molitor Oil, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Feb 2026 |
| 193 | Morsey Oil & Gas | | Oil & Gas Operator | Mar 1995 |
| 194 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 195 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2026 |
| 196 | Mustang Fuel Cor | | Oil & Gas Operator | Dec 1990 |
| 197 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Feb 2026 |
| 198 | National Petroleum Reserves, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2012 |
| 199 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Jun 2026 |
| 200 | Northern Gas Pro | | Gas Operator | Jun 1994 |