| 101 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 102 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 103 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 104 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 105 | Westport Petrole | | Oil Operator | Feb 1985 |
| 106 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 107 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 108 | Wheatbelt Invest | | Oil Operator | Mar 1991 |
| 109 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 110 | Wheatland Oil & Gas, Inc. | Wichita, KS 67202 | Gas Operator | Jul 1997 |
| 111 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Sep 2025 |
| 112 | Whitaker Companies, Inc. | Humboldt, KS 66748 | Oil & Gas Operator | Apr 2025 |
| 113 | Whitaker Enterpr | | Oil Operator | Oct 1992 |
| 114 | Whitaker Harold | | Oil Operator | Aug 1990 |
| 115 | Whitco Petroleum, LP | Leoti, KS 67861 | Oil & Gas Operator | Sep 2025 |
| 116 | White & Ellis DR | | Oil & Gas Operator | Aug 1995 |
| 117 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 118 | White Eagle Reso | | Oil Operator | Dec 1996 |
| 119 | White Eagle Resources Corp. | Taos, NM 87571 | Oil & Gas Operator | Jun 2016 |
| 120 | White Exploration Inc | Wichita, KS 67278 | Oil & Gas Operator | Sep 2025 |
| 121 | White Gas & Oil | Mesa, AZ 85210 | Oil Operator | Oct 2006 |
| 122 | White Hawk Oil C | | Oil & Gas Operator | Sep 1995 |
| 123 | White Hawk Oil Company, A General Partnership | Tulsa, OK 74101 | Oil Operator | Sep 2025 |
| 124 | White Hawk Oil Company, LLP | Tulsa, OK 74103 | Oil Operator | Sep 2025 |
| 125 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 126 | White Oilfield S | | Oil & Gas Operator | Jan 1990 |
| 127 | White Pine Petro | | Oil Operator | Mar 1985 |
| 128 | White Pine Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 129 | White Rock Oil LLC | De Soto, KS 66018 | Oil Operator | May 2012 |
| 130 | White, Edgar W. | Elkhart, KS 67950 | Gas Operator | Dec 2015 |
| 131 | White, Kenneth S. | Wichita, KS 67220 | Oil & Gas Operator | Sep 2022 |
| 132 | White, Robert F. | Wichita, KS 67220 | Oil & Gas Operator | Feb 2007 |
| 133 | Whitehall Energy Corp. | Houston, TX 77095 | Gas Operator | Apr 2010 |
| 134 | Whiteman Industries Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2025 |
| 135 | Whitetail Crude | | Oil Operator | Nov 1996 |
| 136 | Whitetail Crude Inc | Ness City, KS 67560 | Oil & Gas Operator | Sep 2025 |
| 137 | Whitlow Energy, Inc. | Spring Hill, KS 66083 | Oil & Gas Operator | Sep 2025 |
| 138 | Wichita Industri | | Oil Operator | Nov 1987 |
| 139 | Wick'S Petroleum | | Oil Operator | Aug 1983 |
| 140 | Widener, A.C. Farms, Inc. | Hudson, KS 67545 | Oil Operator | Dec 2009 |
| 141 | Widrig Donald N | | Oil Operator | May 1988 |
| 142 | Widrig Oil LLC | Leawood, KS 66209 | Oil Operator | Sep 2025 |
| 143 | Widrig, Don | Leawood, KS 66209 | Oil Operator | Jul 2008 |
| 144 | Wiedemann K T TR | | Oil Operator | Jul 1992 |
| 145 | Wiesner, Roman L. | Ellis, KS 67637 | Oil Operator | Dec 1993 |
| 146 | Wiesner, Tom Oil Operations | Hays, KS 67601 | Gas Operator | Sep 2025 |
| 147 | Wil-Max Co. | Kingman, KS 67068 | Oil Operator | Jul 2001 |
| 148 | Wilcox Oil, LLC | Wichita, KS 67235 | Oil Operator | Dec 2019 |
| 149 | Wildcat Energy, Inc. | Sedan, KS 67361 | Oil Operator | Feb 2001 |
| 150 | Wildcat Oil & Gas LLC | Seneca, KS 66538 | Oil & Gas Operator | Sep 2025 |
| 151 | Wildcat Resc Inc | | Oil & Gas Operator | Nov 1992 |
| 152 | Wildcat Resources | | Oil & Gas Operator | Jun 2016 |
| 153 | Wildfire Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2014 |
| 154 | Wildhorse Oil | Bogue, KS 67625 | Oil Operator | Oct 1994 |
| 155 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 156 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 157 | Wiley R. Ash, Jr. | | Oil & Gas Operator | Jun 1983 |
| 158 | Wilkinson Drilli | | Oil Operator | Dec 1991 |
| 159 | William G Smith Oil, LLC | Osawatomie, KS 66064 | Oil Operator | Apr 2014 |
| 160 | Williams Gas Pipeline Central, Inc. | Shawnee Mission, KS 66215 | Oil Operator | Sep 2010 |
| 161 | Williams Gerald | | Oil & Gas Operator | Apr 1989 |
| 162 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 163 | Williams Production RMT Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2010 |
| 164 | Williams Robert | | Oil & Gas Operator | Apr 1995 |
| 165 | Williams, E. L. | Emporia, KS 66801 | Oil & Gas Operator | Nov 1988 |
| 166 | Williams, M. A. | Houston, TX 77263 | Gas Operator | Feb 2025 |
| 167 | Williams, Paul H. | Plainville, KS 67663 | Oil Operator | Mar 1987 |
| 168 | Williams, Paul M. And/Or Judy A. | Leroy, KS 66857 | Oil Operator | Nov 2018 |
| 169 | Williams, Raymond H.(Deceased) | Sedan, KS 67361 | Oil Operator | Nov 2009 |
| 170 | Williams, Robert J. | Independence, KS 67301 | Oil Operator | May 2019 |
| 171 | Williams, W. R. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2013 |
| 172 | Williford Energy | | Gas Operator | Jun 1986 |
| 173 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 174 | Willis Energy | Neodesha, KS 66757 | Oil & Gas Operator | Dec 2009 |
| 175 | Wilson Charles B | | Oil & Gas Operator | Dec 1996 |
| 176 | Wilson County Holdings LLC | Golden, CO 80403 | Oil Operator | Sep 2025 |
| 177 | Wilson Drilling | | Oil & Gas Operator | Apr 1994 |
| 178 | Wilson Oil Compa | | Oil Operator | Dec 1986 |
| 179 | Wilson Oil Properties, LLC | Winfield, KS 67156 | Oil Operator | Nov 2009 |
| 180 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2026 |
| 181 | Wilson Richard A | | Oil Operator | Dec 2009 |
| 182 | Wilson Robert P | | Gas Operator | Dec 1996 |
| 183 | Wilton Petroleum | | Oil & Gas Operator | Jun 1985 |
| 184 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Sep 2025 |
| 185 | Wimsett Kenneth | | Oil Operator | Apr 1989 |
| 186 | Win Oil Company | Russell, KS 67665 | Oil & Gas Operator | Jul 2021 |
| 187 | Winco Of Kansas | Kechi, KS 67067 | Oil Operator | Aug 1982 |
| 188 | Wind River Exploration Inc | Sewickley, PA 15143 | Oil & Gas Operator | Sep 2025 |
| 189 | Wind River Oil & Gas, Inc. | Jackson, WY 83002 | Oil Operator | Aug 2000 |
| 190 | Winder Oil Company | | Oil Operator | Jun 2025 |
| 191 | Windgate Oil Com | | Oil Operator | Jul 1985 |
| 192 | Windler-Doudna, A General Partnership | | Oil Operator | Sep 2000 |
| 193 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 194 | Winona Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 195 | Winterscheid Oil, LLC | Olpe, KS 66865 | Oil Operator | Dec 2019 |
| 196 | Wintershall Oil | | Oil Operator | Sep 1985 |
| 197 | Wirtz Oil, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Sep 2025 |
| 198 | Wise, Rodney J. | Anna, OH 45302 | Oil Operator | Jul 2011 |
| 199 | Witcraft, Jimmy D. | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 1987 |
| 200 | Withers, Lawrence | Copeland, KS 67837 | Gas Operator | Nov 1996 |