| 201 | Wolfe, Ray | Longton, KS 67352 | Oil Operator | Jul 1988 |
| 202 | Wollard-Abbott Crude, A General Partnership | Parker, KS 66072 | Oil Operator | May 2008 |
| 203 | Womelsdorf Oil | Welda, KS 66091 | Oil Operator | Apr 1999 |
| 204 | Wood Energy, Inc. | Mount Vernon, IL 62864 | Oil Operator | Dec 2024 |
| 205 | Wood McShane & T | | Oil Operator | Nov 1987 |
| 206 | Wood, Donald E. | Independence, KS 67301 | Oil & Gas Operator | Dec 2023 |
| 207 | Wood, E. H., Jr. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2010 |
| 208 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |
| 209 | Woodman & Iannitti Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2003 |
| 210 | Woods Oil | | Oil Operator | Dec 2024 |
| 211 | Woolsey Operating Company, LLC | Wichita, KS 67226 | Oil & Gas Operator | Dec 2024 |
| 212 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2024 |
| 213 | Worldwide Energy | | Oil & Gas Operator | May 1989 |
| 214 | Worsham Petroleum | Denver, CO 80209 | Gas Operator | Aug 2001 |
| 215 | Worth Drilling | | Oil Operator | Jun 1993 |
| 216 | Wortman Farms, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2017 |
| 217 | Wren Investments | | Oil Operator | Feb 1991 |
| 218 | Wrestler Ronald | | Oil Operator | Dec 1994 |
| 219 | Wrestler, David L., A General Partnership | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 220 | Wrestler, Ronald D., A General Partnership | Elsmore, KS 66732 | Oil Operator | Dec 2024 |
| 221 | Wright, Erbe & Oil Assoc.& Tubbs | Thayer, KS 66776 | Oil Operator | Apr 2005 |
| 222 | Wykoma Oil Incor | | Oil & Gas Operator | Jul 1990 |
| 223 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |