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