| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 301 | Wildfire Oil & Gas Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2014 |
| 302 | Williams Robert | Oil & Gas Operator | Apr 1995 | |
| 303 | Williams, Robert J. | Independence, KS 67301 | Oil Operator | May 2019 |
| 304 | Willis Energy | Neodesha, KS 66757 | Oil & Gas Operator | Dec 2009 |
| 305 | Windgate Oil Com | Oil Operator | Jul 1985 | |
| 306 | Wood Donald E | Independence, KS 67301 | Oil & Gas Operator | Dec 2025 |
| 307 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 308 | Yocham Oil Company | Oil Operator | Feb 2026 | |
| 309 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 310 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2026 |
| 311 | Zoandra Petroleu | Oil & Gas Operator | May 1993 |